Arrogant Programmer

Gradle

2012-01-24T15:04:00.000-05:00

A few years ago I read The Pragmatic Programmer. The Pragmatic Programmer may not be the GoF book, but it's almost as valuable.

Andy Hunt and Dave Thomas recommend learning a new language every year. I started with Groovy.

Being a Java developer I thought Groovy would give me the most bang-for-the-buck. After all Groovy is part of the Java spec so there is no excuse not to learn it.

I think Groovy delivered. I used to think that Groovy was worth learning for XML parsing/writing alone. XMLSlurper and MarkupBuilder are by far the best things I've used for dealing with XML.

Gradle changed my mind. Gradle is a fantastic build tool. Maven solves some problems, but it is a whole set of problems itself. Gradle can run Ant tasks so you keep Ant's functionality.

As for the one language per year thing I picked up Python next and got a Django app into production. I'm on Ruby now, but I'm behind schedule. I'll get to Scala soon...

No bundle plugin resource available to handle deployment for bundle type

2012-01-24T14:47:00.000-05:00

The first time I tried deploying a bundle with a fresh server and JBoss Operations Network agent I got the following error :

java.lang.Exception:No bundle plugin resource available to handle deployment for bundle type [BundleType[id=10001,name=Ant Bundle]]. Ensure the bundle plugin is deployed and its resource is imported into inventory.

I restarted the agent and everything was fine.

If I can reproduce this its time to login to Bugzilla. I thought I'd post here first in case anyone Googles the Exception though.

Happy coding

PAE kernel

2011-12-15T08:14:00.000-05:00

I use virtual machines a lot and really need more memory (more than 3.7GiB.)

Unfortunately I'm still running 32 bit Fedora 14. I tried the 64 bit version, but had some problems with Firefox and Eclipse.

I've put off upgrading because of Gnome 3. I tried out the Live Disc for 15. It didn't convince me.

Since then I've heard enough good things about Gnome Shell that I'm willing to bite the bullet. But just to play it safe I've been waiting until I have a few days with no meetings. So meanwhile...

I added memory and installed the PAE kernel.

sudo yum install kernel-PAE

Pretty simple and my machine immediately recognized the extra memory.

SELinux and WebEx playback

2011-11-15T23:13:00.001-05:00

While trying to watch a WebEx recording I got only sound and an SELinux alert.

I had to set SELinux to "Permissive" :

# setenforce Permissive

A small price to pay.

The WebEx, btw, was Kris Verlaen's presentation on jBPM5.

JBUG ATL or Atlanta JBoss Users Group

2011-11-14T15:30:00.000-05:00

The Atlanta JBug kicks off December 14.

The meeting will be held at :
Shadow-Soft
8200 Roberts Drive, Suite 201, Atlanta, GA

How to change the ports that JBoss uses

2011-10-27T20:27:00.001-04:00

The easiest way is to simply pass a command line argument. This takes care of any desktop/laptop/development purposes.

run -Djboss.service.binding.set=ports-01
run -Djboss.service.binding.set=ports-02

For more complete changes check out the official docs under, 1.7 The Service Binding Manager .

Where did the drools-api.jar go?

2011-10-26T14:54:00.000-04:00

JBoss BRMS 5.2 is out so naturally I started a new project in it.

The first thing I noticed after updating my pom.xml was that there was no drools-api-version.jar.

All of the api classes are now in knowledge-api-version.jar. Be sure to update your pom!

Architecting Solutions

2011-08-24T05:11:00.000-04:00

Yesterday was my one year anniversary with Red Hat specifically with the JBoss the middleware division. I am a Middleware Solutions Architect or "SA."

I haven't blogged much since joining Red Hat. The drop in output is partially due to time constraints. In the past year I have been in
Atlanta, Boston, Canton, GA, Franklin, TN, Ft. Lauderdale, Knoxville, Memphis, Miami, Mt. View, Nashville, Orlando, Pittsburgh, Raleigh, San Francisco, Tampa, and Washington D.C.

Another reason for the reduced output is that I had not written my disclaimer post either. This is the disclaimer post.

I have largely avoided opinionated posts focusing instead on solutions to real problems. However, I don't get my hands dirty in code on a daily basis any more. I still plan to focus on real solutions, but I might add some opinion, observations and predictions. So be forewarned, the opinions that you read here belong to a Red Hat employee.

Red Hat is a great place to work, btw.

Rubykoans.com

2011-02-01T20:32:00.003-05:00

A few years ago I decided to follow the Pragmatic Programmer's suggestion to learn a new language each year.

I started with Groovy. I make my living coding Java. I figured that I would get the most bang for my buck with Groovy. Groovy's XML utilities alone have saved me tons of time. I've also done a project in Grails, and I would gladly do another one.

I picked up Python next. I like Python, and I have had some fun monkeying with Google AppEngine. I have not had the chance to use it professionally.

I had intended to pick up Ruby last year. Several of the best people I've worked with, one of whom is a best selling Java author, have extolled Ruby's virtues to me. Hectic schedules and a job change threw a wrench into my plans so I'm picking up Ruby this year.

I have been enjoying rubykoans for the past couple of days. The koans consist of a handful of ruby files full of assertions that don't pass. By correcting and filling them in the files of course begin to work.

Simply running "rake" in the directory tells you how many you have completed. You are even rewarded with ASCII art upon completing a koan.

KVM : disabled by BIOS

2011-01-31T21:37:00.004-05:00

I had no idea what Intel AMT was before I tried to fire up libvirt.

While working through the Fedora virtualization quick start, I ran :

$ lsmod | grep kvm

which should have returned :

$ lsmod | grep kvm
kvm
kvm_intel

Unfortunately I had only, "kvm." The troubleshooting guide suggested running :

$ dmesg | grep -i kvm

Which returned,

$ dmesg | grep -i kvm
KVM: disabled by BIOS

Happy day. I booted into the BIOS ("Press the blue, ThinkVantage button!") and disabled AMT. Unfortunately that didn't do it either. I rebooted again, pressed "the blue, ThinkVantage button," chose "CPU" and enabled the two settings for virtualization,"Intel Virtualization Technology" and "Intel VT-d Feature."

After the next reboot all was well.

SOAPui

2011-01-11T20:15:00.002-05:00

This post is a shameless plug for soapUI.

I came across soapUI while running through the Self-Paced Workshop for the JBoss SOA Platform (pdf download.) It is incredibly simple to create a test for a web service. There is even an Eclipse plugin, but I haven't tried that yet.

Happy coding.

Recursive setfacl or how to add your PostgreSQL data directory to Git

2010-11-29T22:13:00.003-05:00

This was an interesting annoyance.

I was working on some examples and wanted to be able to delete everything cleanly after I was done.

I had an instance of JBoss and wanted PostgreSQL to use a local directory for data.

My directory structure was :
example/
data
jboss-eap-5.1
logs

I had a user "postgres" to run PostgreSQL. Since the rest of the directory was created by me, "jeremy," I used setfacl to add "postgres" to the data directory:

setfacl -m u:postgres:rwx ./data/

When I ran :

initdb -D data/

It wasn't happy. I got :

"initdb: could not change permissions of directory"

Next up was :

sudo chown -R postgres:postgres data/

That worked for "initdb." I was able to su to the "postgres" user and execute "initdb" in "data/."

I was happy until I tried to add "data/" to Git :

[jeremy@jeremy example]$ git add data
error: open("data/PG_VERSION"): Permission denied
error: unable to index file data/PG_VERSION
fatal: adding files failed

setfacl to the rescue!

sudo setfacl -Rm u:jeremy:rwx ./data/

Unfortunately I got the same error.
I was missing the important "d" argument. The following worked :

sudo setfacl -Rm u:jeremy:rwx,d:u:jeremy:rwx ./data/

"sudo" was necessary because of changing the ownership to the "postgres" user.

I added everything to Git.

The moral of this rambling story : use the "d" flag with setfacl to cascade permissions to the files.

xlcip or How to copy past from the command line to x-windows

2010-10-12T11:10:00.003-04:00

Brain Ashburn, my colleague in the Atlanta Red Hat office, introduced me to the xclip utility today. It copies output from the command line and puts it into x-windows.

For example, to copy the current directory :

 pwd | xclip -i -sel "clip"

There are of course more useful things that can be piped to it. To try it out create a file, add some text and :

cat newfile | xclip -i -sel "clip"

Its available through yum :

sudo yum install xclip

Installing MySQL with Yum

2010-10-05T09:43:00.003-04:00

A quick note on installing mysql with yum in case anyone else is lazy (like me) and runs :

sudo yum install mysql

That only installs half of what's needed. nixCraft sums it up nicely for RHEL. It also works for Fedora :

$ sudo yum install mysql
$ sudo yum install mysql-server

To start it up and set the root user/password :

$ sudo yum install mysql
$ sudo chkconfig mysqld on
$ sudo /etc/init.d/mysqld start
$ mysqladmin -u root password PASSWORD
$ mysql -u root -p

H2 Connections in Eclipse

2010-10-05T08:43:00.002-04:00

H2 is a great database for prototyping and local work. Eclipse does not come with a default driver definition though.

Dan Allen has a nice tutorial on Google code illustrating how to set one up.

You don't have permission to access / on this server.

2010-10-01T14:47:00.002-04:00

More fun with Apache.

There was a time when I could configure Apache without the help of Google. Alas, that time was years ago.

I wanted several versions of Apache on my machine so that I could test different mod_cluster configurations side by side.

I downloaded the Apache source, built it and put in "/examples" under my home directory. After I started it I got :

You don't have permission to access / on this server.

I immediately checked the directory permissions. They looked okay. I spent some time monkeying with the SELinux security settings.

The problem was simple: Apache needs execute permissions all the way up to the root directory.

Simply moving my "examples" directory to the root fixed it.

httpd dead but subsys locked

2010-09-24T12:05:00.003-04:00

While firing up apache this morning I got nothing. A quick "httpd status" returned an interesting message :

httpd dead but subsys locked

I have no idea when the lock got created. I assume it was the last time I ran apache. I don't use it as a daemon.

The solution was simply to delete the lock :

sudo rm /var/lock/subsys/httpd

All was well after that.

Gnome Do

2010-08-27T08:20:00.004-04:00

A Mac user by choice I am completely addicted to Quicksilver.

I've used Launchy on Windows. Launchy is okay, but it requires a lot of babysitting. Searchable folders have to be tweaked to get decent results.

I've recently started using Fedora 13. Naturally I wanted a launcher. Wikipedia has a nice comparison of launchers. I installed Gnome Do from yum :

sudo yum install gnome-do

Its fast and returns meaningful results quickly. Its also written in Mono which I find marginally interesting.

Hidden Gnome Panels in Fedora 13

2010-08-26T20:57:00.002-04:00

I recently installed the new Fedora.

I right clicked my top panel and chose "Add Panel." Firefox, which had been maximized shrank about the size of a panel on the right side of the screen.

Just for grins I right clicked and added another panel. Firefox shrank on the left side.

I added "Show Desktop" to the top panel and clicked it. Panels appeared on each side of the desktop. I right clicked and deleted them.

Debugging Grails Apps in Eclipse

2010-08-08T15:01:00.003-04:00

This is pretty simple to accomplish. Simply run "grails-debug run-app" instead of "grails run-app".

However, be sure to start the debugger in Eclipse! The app doesn't finish starting up until the debugger is attached. I spent some time wondering what was taking so long before putting that together.

Grails LinkageError for SAXParseException

2010-07-29T15:18:00.004-04:00

I ran "grails run-app" for the app that I've been working on and was greeted with the following :

java.lang.LinkageError: loader constraint violation: loader (instance of <bootlo
ader>) previously initiated loading for a different type with name "org/xml/sax/
SAXParseException"
   at java.lang.Class.getDeclaredMethods0(Native Method)
   at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
   at java.lang.Class.getDeclaredMethods(Class.java:1791)
   at java.security.AccessController.doPrivileged(Native Method)
   at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:4
6)
   at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
   at grails.util.PluginBuildSettings.getPluginInfos(PluginBuildSettings.gr
oovy:127)
   at grails.util.PluginBuildSettings.getPluginInfos(PluginBuildSettings.gr
oovy)
   at grails.util.PluginBuildSettings$getPluginInfos.callCurrent(Unknown So
urce)
   at grails.util.PluginBuildSettings.getPluginInfo(PluginBuildSettings.gro
ovy:164)
   at grails.util.PluginBuildSettings$getPluginInfo.callCurrent(Unknown Sou
rce)
   at grails.util.PluginBuildSettings.getPluginInfoForSource(PluginBuildSet
tings.groovy:202)
   at org.codehaus.groovy.transform.ASTTransformationVisitor$3.call(ASTTran
sformationVisitor.java:303)
   at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(Compil
ationUnit.java:832)
   at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(Compilat
ionUnit.java:519)
   at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(Co
mpilationUnit.java:495)
   at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.j
ava:472)
   at _GrailsEvents_groovy.run(_GrailsEvents_groovy:54)
   at _GrailsEvents_groovy$run.call(Unknown Source)
   at _GrailsClean_groovy$run.call(Unknown Source)
   at _GrailsClean_groovy.run(_GrailsClean_groovy:29)
   at _GrailsClean_groovy$run.call(Unknown Source)
$
   at _GrailsPlugins_groovy.run(_GrailsPlugins_groovy:32)
   at _GrailsPlugins_groovy$run.call(Unknown Source)
   at _GrailsRun_groovy$run.call(Unknown Source)
   at _GrailsRun_groovy.run(_GrailsRun_groovy:31)
   at _GrailsRun_groovy$run.call(Unknown Source)
   at RunApp.run(RunApp.groovy:25)
   at RunApp$run.call(Unknown Source)
   at gant.Gant.prepareTargets(Gant.groovy:606)
Error loading event script from file [PATH_TO_GRAILS\.grails
\1.3.1\projects\PROJECT_NAME\plugins\code-coverage-1.1.8\scripts\_Events.gr
oovy] loader constraint violation: loader (instance of <bootloader>) previously
initiated loading for a different type with name "org/xml/sax/SAXParseException"

Grails had done some sort of update that I didn't pay a lot of attention to. I wondered if this had something to do with the update and will have to find out what went on later.

I found an entry on the Grails Jira dealing with the problem of xerces and Java 6. The suggested solution was to remove xml-apis-1.0.2.b2.jar.

I ran :

find . -name "*xml*"
find . -name "*api*"

from my project directory, my .grails directory and my .ivy directory. I found xml-apis-1.3.04.jar in my .ivy directory.

I ran jarscan against my project directory, .grails directory and .ivy directory and found 0 hits for SAXParseException.

I added :

    inherits("global") {
      excludes "xml-apis"
  }

To my BuildConfig.groovy file just below dependencies. The app ran.

Changing form actions with jQuery

2010-07-17T10:37:00.004-04:00

I'm working on a simple cms in a side project. Naturally I have a page where administrators can create new web pages.

I'm using the jQuery version of TinyMCE for editing. It is worth a look if you need wysiwyg textarea editing.

I wanted to give my client the ability to preview the page before saving it. The solution was simple: change the form's action in the click handler.

The implementation eluded me for a while; although, it was completely obvious:

                $("#preview").click(function(event){
                   event.preventDefault();
                   $("#create_page_form").attr( "action", "/preview_page" );
                   $("#create_page_form").submit();
               });

               $("#submit").click(function(event){
                   event.preventDefault();
                   $("#create_page_form").attr( "action", "/create_page" );
                   $("#create_page_form").submit();
               });

"#preview" and "#submit" are the ids of two links but could be buttons.

I thought I would post it in the event that anyone else Google's "jQuery change form action."

SHIFT : q

2010-07-13T21:12:00.001-04:00

No matter what text editor I'm in I can't help but typing "SHIFT :" followed by "q".

Does that happen to anyone else?

groovy.lang.MissingMethodException: No signature of method: static .list() is applicable for argument types:

2010-06-25T14:17:00.002-04:00

I've started using Grails recently. Its really nice. Productive, easy to get up and running, etc.

My first stab at testing a Controller produced :

groovy.lang.MissingMethodException: No signature of method: static dbtestapp.Team.list() is applicable for argument types:
(org.codehaus.groovy.grails.web.taglib.GroovyPageAttributes) values: [[max:10]]
Possible solutions: is(java.lang.Object), wait(), wait(long), print(java.lang.Object), split(groovy.lang.Closure), use([Ljava.lang.Object;)
at dbtestapp.TeamController$_closure2.doCall

A little weird. list() is a dynamic method and should be on the object.

Its a known issue in the Grails Jira. The solution is to stick the test inside the "integration" package.

Ubuntu slow internet connection

2010-06-14T23:19:00.002-04:00

I'm running Ubuntu Karmic Koala on a Dell Latitude D620. I've had a pretty tough time with wireless. Broadcom's support for Linux is terrible.

Yesterday my browsers became ridiculously slow. Running "ping" or "host" from Konsole showed that the problem wasn't networking.

I found a few posts suggesting that I disable IPv6 and reboot. I created a file "/etc/modprobe.d/bad_list", added "alias net-pf-10 off" and rebooted. Much better.

I was on another machine and don't have links to the actual posts from Linux forums and Ubuntu's forums. My apologies to the solution's authors.

java.lang.ClassNotFoundException: org.codehaus.groovy.transform.powerassert.ValueRecorder

2010-06-07T09:33:00.002-04:00

Running a GroovyTestCase in a new project I got the following :

java.lang.NoClassDefFoundError: org/codehaus/groovy/transform/powerassert/ValueRecorder
   at [My Package Hierarchy].[My TestCase].[My Test Method]([My Test Case].groovy:29)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at junit.framework.TestCase.runTest(TestCase.java:168)
   at junit.framework.TestCase.runBare(TestCase.java:134)
   at junit.framework.TestResult$1.protect(TestResult.java:110)
   at junit.framework.TestResult.runProtected(TestResult.java:128)
   at junit.framework.TestResult.run(TestResult.java:113)
   at junit.framework.TestCase.run(TestCase.java:124)
   at junit.framework.TestSuite.runTest(TestSuite.java:232)
   at junit.framework.TestSuite.run(TestSuite.java:227)
   at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:79)
   at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
   at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.transform.powerassert.ValueRecorder
   at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
   ... 20 more

I found a bug that was closed because it couldn't be reproduced in the Groovy Eclipse JIRA.

I had run GroovyTestCases in other projects without this problem.

I right clicked the project and chose "Groovy -> Add Groovy libs to Classpath." That fixed it.

I had added my own Groovy library instead of the plugins. I often point Eclipse Libraries to the jar files in my .m2 directory. The "org.codehaus.groovy.transform.powerassert" package was not part of the Groovy distro. It is part of Groovy Eclipse plugin.

Another cool NetBeans theme

2010-06-05T08:24:00.002-04:00

I really like a dark background in my IDE. I previously mentioned the Aloha theme for NetBeans. I've been using if for a while.

Yesterday I found a version of Twilight for NetBeans. This one is set up for PHP, but works pretty well for Python. It is tweakable of course too.

Using .hgignore

2010-05-19T20:53:00.002-04:00

Being a Java guy by day I typically use the source control stalwarts subversion and cvs. I've been exposed to other source control software of course. I used Borland's StarTeam on one gig, and I had a brief, horrific experience with Visual Source Safe.

Now that I'm a Python guy by night I have been using Mercurial. I like it. Its fast. Bitbucket is really sweet.

I use it on the command line; although, NetBeans has built in support. Naturally I got tired of seeing all my compiled Python files (*.pyc) when I ran, "hg status."

hg status
...
flatpages/forms.pyc                                                               
flatpages/models.pyc
...

Putting a file, ".hgignore" in the root of the directory is the solution. This is duly documented all over the web. I had problems with the syntax nonetheless.

That was what I ended up with:

# use glob syntax.
syntax: glob
*.elc
*.pyc
*
*.bfproject
*.kpf

templates_compiled/**

The glob syntax is pretty intuitive.

Parse Error: Expected no additional symbols at symbol select

2010-05-16T15:20:00.002-04:00

Running the following query :

query = MODEL_NAME.gql("select * from MODEL_NAME where name = :1", supplied_name)

I got the error below :

Traceback (most recent call last):                                                               
File "<console>", line 1, in <module>                                                          
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/db/__init__.py", line 1100, in gql                                                                                                              
 *args, **kwds)                                                                                             
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/db/__init__.py", line 2047, in __init__                                                                                                         
 self._proto_query = gql.GQL(query_string, _app=app)                                                        
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 192, in __init__                                                                                                         
 if not self.__Select():                                                                                    
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 799, in __Select                                                                                                         
 return self.__From()                                                                                       
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 820, in __From                                                                                                           
 return self.__Where()                                                                                      
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 833, in __Where                                                                                                          
 return self.__OrderBy()                                                                                    
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 1056, in __OrderBy                                                                                                       
 return self.__Limit()                                                                                      
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 1098, in __Limit                                                                                                         
 return self.__Offset()                                                                                     
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 1117, in __Offset                                                                                                        
 return self.__Hint()                                                                                       
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 1140, in __Hint                                                                                                          
 return self.__AcceptTerminal()                                                                             
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appengine/ext/gql/__init__.py", line 784, in __AcceptTerminal                                                                                                 
 self.__Error('Expected no additional symbols')                                                             
File "[PATH TO APP ENGINE INSTALL]google_appengine_1.3.1/google/appeng
ine/ext/gql/__init__.py", line 724, in __Error                                                                                                          
 (error_message, self.__symbols[self.__next_symbol]))                                                       
BadQueryError: Parse Error: Expected no additional symbols at symbol select

This is a simple fix:

query = MODEL_NAME.gql("select * from MODEL_NAME where name = :1", supplied_name)

App Engine's orm is already supplying the "select * from" part of the query.

Gql and object inheritance

2010-05-13T20:47:00.003-04:00

I am working on an AppEngine project using the Kay Framework.

I was testing my queries in Kay Framework's shell. If you are familiar with Django's shell it is essentially the same.

Running the following query :

query = db.GqlQuery("select * from MyUserObject where user_name = :1 and password = :2")

I got this error :

raise KindError('No implementation for kind \'%s\'' % kind)

I had imported the object. My object inherits from the framework's DatatstoreUser.

Apparently the ORM sometimes struggles with inherited classes in different packages.

Changing to the following :

query = MyUserObject.gql("where user_name = :1", "testuser@testuser.com")

provided exactly what I needed.

Projects using GWT 1.5 or lower may only specify one entry point module to compile

2010-04-30T10:08:00.003-04:00

Despite

Having the 2.0.3 GWT plugin installed

Never having used the 1.5 GWT plugin

I was getting the following error when clicking the GWT compile button :

 Projects using GWT 1.5 or lower may only specify one entry point module to compile

The solution was to move my GWT dependencies above my Maven dependencies.

Right click on the project -> Build Path -> Configure Build Path... -> Order and Export

Click on GWT SDK and Up until it is just below the JDK.

Please make sure the -vm option in eclipse.ini is pointing to a JDK

2010-04-30T09:23:00.003-04:00

Ececutive summary : put the vm argument on the line after "-vm" in eclipse.ini.

I got the following dialog after a fresh Eclipse install :

The Maven Integration requires that Eclipse be running in a JDK, because a number of Maven core plugins are using jars from the JDK.
Please make sure the -vm option in eclipse.ini is pointing to a JDK and verify that Installed JREs are also using JDK installs.

The Installed JREs were already pointing to a JDK. I set my my eclipse.ini to : -vm C:\Sun\SDK\jdk

-vm C:\Sun\SDK\jdk\bin\javaw.exe

No luck.
Eclipsepedia has an eclipse.ini.

I put the vm location on the next line and everything worked.

Cool NetBeans Plugin

2010-03-16T22:32:00.005-04:00

Last week at AJUG's Devnexus conference Venkat Subramanium made an interesting point about IDEs.

He asked how many of the people in attendance used Eclipse. Unsurprisingly almost everyone raised a hand.

Then he asked how many of us would use it if it cost $500. Almost all of the hands dropped, including mine.

I downloaded NetBeans and IntelliJ.

I had used NetBeans for a while before. One thing I liked was its themes. I like light text on a dark background.

I found this theme, Aloha, and installed it. Pretty nice.

Django Nonrel and Google App Engine

2010-03-10T23:51:00.004-05:00

The guys behind appengine patch have a new project using the Django nonrel project to run on App Engine.

Clone the appropriate projects from bitbucket :

$ hg clone https://[Bitbucket User Name]@bitbucket.org/wkornewald/django-nonrel/
$ hg clone https://[Bitbucket User Name]@bitbucket.org/wkornewald/djangoappengine/
$ hg clone https://[Bitbucket User Name]@bitbucket.org/wkornewald/django-testapp/

The instructions say next, "Now you should be able to create a new app in the testapp folder and use native Django models on App Engine. Try it!"

dignan@dignan-laptop:~/workspace/django-nonrel/django-testapp$ python manage.py runserver
Traceback (most recent call last):
File "manage.py", line 4, in <module>
from djangoappengine.boot import setup_env
ImportError: No module named djangoappengine.boot

Hmmm.

The documentation calls for two symlinks :

django-testapp/common-apps/djangoappengine -> ../../djangoappengine

django-testapp/common-apps/djangoappengine -> ../../django-nonrel/django

I created them and tried again.

The Google App Engine SDK could not be found!
Make sure it's accessible via your PATH environment.

So I added the it to my path and tried again. Same result.

I found the following on the appengine-patch website:

"you can also put the SDK into any folder that is in the system's PATH environment variable as long as it's called "google_appengine" (this works with any OS)"

My sdk was in "google_appengine_1.3.0". I created a symlink, "google_appengine" and tried again.

/home/dignan/tools/appengine/google_appengine_1.3.0/google/appengine/api/datastore_file_stub.py:40: DeprecationWarning: the md5 module is deprecated; use hashlib instead                                                             
import md5                                                                                                    
/home/dignan/tools/appengine/google_appengine_1.3.0/google/appengine/api/memcache/__init__.py:31: DeprecationWarning: the sha module is deprecated; use the hashlib module instead                                                    
import sha
WARNING  2010-03-10 22:41:09,468 datastore_file_stub.py:483] Could not read datastore data from /tmp/django_nonreltest.datastore
Traceback (most recent call last):
File "workspace/django-norel/django-testapp/manage.py", line 16, in <module>
execute_manager(settings)
File "/home/dignan/workspace/django-norel/django-testapp/common-apps/django/core/management/__init__.py", line 438, in execute_manager
utility.execute()
File "/home/dignan/workspace/django-norel/django-testapp/common-apps/django/core/management/__init__.py", line 379, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "workspace/django-norel/django-testapp/common-apps/djangoappengine/management/commands/runserver.py", line 88, in run_from_argv
start_dev_appserver(argv)
File "workspace/django-norel/django-testapp/common-apps/djangoappengine/management/commands/runserver.py", line 74, in start_dev_appserver
dev_appserver_main.main([progname] + args + [os.getcwdu()])
File "/home/dignan/tools/appengine/google_appengine_1.3.0/google/appengine/tools/dev_appserver_main.py", line 360, in main
config, matcher = dev_appserver.LoadAppConfig(root_path, {})
File "/home/dignan/tools/appengine/google_appengine_1.3.0/google/appengine/tools/dev_appserver.py", line 3441, in LoadAppConfig
raise AppConfigNotFoundError
google.appengine.tools.dev_appserver.AppConfigNotFoundError

At least it started! I cd'd into the app's directory and ran:

python manage.py runserver

It started up. I got the default "It worked!" page.

Using the Google App Engine Helper for Django

2010-02-14T18:28:00.003-05:00

Working through the steps to install the Google Appengine Helper for Django, I zipped up Django 1.1 and placed it in the root directory. I ran, "python manage.py runserver" and got the following error :

dignan@dignan-laptop:~/workspace/python/[PROJECT_NAME]$ python manage.py runserver
ERROR:root:Django 1.0 or greater is required!

The solution was simple. I zipped up the "django" folder inside the complete distro and put it in the root.

Cool JQuery UI trick

2010-01-21T09:20:00.001-05:00

I saw this on DZone this morning. I think it deserve an upvote and a link :

Mycila Blog: Page decomposition with JQuery UI

Dustin's Software Development Cogitations and Speculations: Viewing Groovy Application's Classpath

2010-01-11T08:55:00.000-05:00

I found this Groovy tip on DZone this morning :

Dustin's Software Development Cogitations and Speculations: Viewing Groovy Application's Classpath

Django properties for settings.py

2009-11-20T23:42:00.002-05:00

I wanted to externalize all of the properties in settings.py for obvious reasons. I found a couple of suggestions.

What I did was create to files, properties_local.py and properties_dev.py. Working locally I imported, "import properties_local as properties"

# Django settings for [project name] project.
import properties_local as properties

and then set the variables accordingly:

DATABASE_ENGINE = properties.DATABASE_ENGINE
DATABASE_NAME = properties.DATABASE_NAME
DATABASE_USER = properties.DATABASE_USER
DATABASE_PASSWORD = properties.DATABASE_PASSWORD
DATABASE_HOST = properties.DATABASE_HOST
DATABASE_PORT = properties.DATABASE_PORT

I only have to change the import setting. I should figure out a way around that soon though.

Django template does not exist

2009-11-19T22:38:00.002-05:00

I got a really annoying error while putting up a new Django site:


TemplateDoesNotExist at /flatpage/
flatpages/default.html
Request Method:    GET
Request URL:    http://[site url]/flatpage/
Exception Type:    TemplateDoesNotExist
Exception Value:  
flatpages/default.html
Exception Location:    /usr/lib/python2.4/site-packages/django/template/loader.py in find_template_source, line 74
Python Executable:    /usr/bin/python
Python Version:    2.4.3
Python Path:    ['/[python path]', '/usr/lib/python24.zip', '/usr/lib/python2.4', '/usr/lib/python2.4/plat-linux2', '/usr/lib/python2.4/lib-tk', '/usr/lib/python2.4/lib-dynload', '/usr/lib/python2.4/site-packages']
Server time:    Thu, 19 Nov 2009 22:39:37 -0500

Of course I had templates in Apache's directory. The Template-loader postmortem (great name) showed that Django was looking for the wrong directory (in italics below.)


Template-loader postmortem

Django tried loading these templates, in this order:
Using loader django.template.loaders.filesystem.load_template_source:
/[development path]/flatpages/default.html (File does not exist)
Using loader django.template.loaders.app_directories.load_template_source:
/usr/lib/python2.4/site-packages/django/contrib/admin/templates/flatpages/default.html (File does not exist)

I know these things should be put into properties. I was being lazy.

I restarted the server to clear out whatever had cashed the older directory entry. Everything was fine.

Nice!

Infoq Interview with Gavin King about Weld anc CDI

2009-11-19T07:52:00.003-05:00

Infoq has a nice interview with Gavin King about Weld and CDI.

Seam is an excellent framework. Hopefully having its' model implemented as part of the JEE spec will push adoption!

Django flatpages, templatetags and dynamic menus

2009-11-10T21:35:00.004-05:00

One thing that Django's flatpages app is missing is a dynamic menu.

Coming from a Java background I am used to a huge user base and lots of open source code. The Django user base continues to meet my expectations.

I found this post detailing the creation of such a menu tag. I hadn't explored custom tags before anyway so I looked forward to trying it out.

I followed the instructions and got the following error :

TemplateSyntaxError at /menu/
'flatpage_menu' is not a valid tag library: Could not load template library from django.templatetags.flatpage_menu, No module named flatpage_menu
Request Method:    GET
Request URL:    http://127.0.0.1:8000/menu/
Exception Type:    TemplateSyntaxError
Exception Value:   
'flatpage_menu' is not a valid tag library: Could not load template library from django.templatetags.flatpage_menu, No module named flatpage_menu
Exception Location:    /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/django/template/defaulttags.py in load, line 927
Python Executable:    /Library/Frameworks/Python.framework/Versions/2.6/Resources/Python.app/Contents/MacOS/Python
Python Version:    2.6.4
Python Path:    ['/Users/jdavis/Documents/django_workspace/cantina76', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python26.zip', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-darwin', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac/lib-scriptpackages', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-old', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload', '/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages']

The post was from last year. I was using the Django 1.1.1. I figured something had changed since his post.

I found a couple of references in Google Groups to this same example, but their suggestions didn't work for me.

The solution was to add my own app to INSTALLED_APPS and "from django import template" to the "flatpage_menu.py" file.

It worked fine after that.

The excellent Mr. Haki blog

2009-09-22T09:30:00.005-04:00

My morning routine has changed recently. I check out Mr. Haki, fire up the Groovy console and run the latest example.

I have been seriously impressed with the work Mr. Haki is doing.

Even if nobody reads this post, I want to at least help his search rankings!

jRecruiter presentation at AJUG

2009-09-16T13:18:00.001-04:00

Gunnar Hillert gave an excellent presentation on his jRecruiter project at AJUG last night.

I will soon be downloading jRecruiter to check it out in more depth. Gunnar mentioned that the Maven build is a little wonky at the moment. He said he would fix it in the next week or two.

He has a lot of really cool stuff in the app:

Struts 2.1, which I have not used. I spent years using the Struts 1.* releases, but have been in the JSF camp for a while now.
Twitter integration, which I've wanting to check out.
GZip and minification.

Check out the project or his blog for a complete list.

"The processing instruction target matching "[xX][mM][lL]" is not allowed."

2009-09-11T15:53:00.002-04:00

I often put the Xml I use for test cases inside of Groovy classes. This allows me to make use of multiline Strings.


String inputXml = '''
<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<records>
<record>
    <recordid>833432</recordid>
    <name>Lorem ipsum dolor</name>
    <parentid>0</parentid>
    <link>http://consectetueradipiscingelit</link>
    <date>9/10/2009</date>
    <description>Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu.</description>
    <category ID="48015"></category>
    <category>In enim justo</category>
</record>
</records>
'''

I ran into this error today :

"The processing instruction target matching "[xX][mM][lL]" is not allowed."

I'm surprised I hadn't run into it before. The problem was that I had white space before the xml prolog.

There are two easy solutions :

Remove the whitespace.
Call "trim()" on the String.

Whitespace removed :

String inputXml = '''<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<records>
 <record>
     <recordid>833432</recordid>
     <name>Lorem ipsum dolor</name>
     <parentid>0</parentid>
     <link>http://consectetueradipiscingelit</link>
     <date>9/10/2009</date>
     <description>Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu.</description>
     <category ID="48015"></category>
     <category>In enim justo</category>
 </record>
</records>

trim() called :

String inputXml = '''
<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<records>
  <record>
      <recordid>833432</recordid>
      <name>Lorem ipsum dolor</name>
      <parentid>0</parentid>
      <link>http://consectetueradipiscingelit</link>
      <date>9/10/2009</date>
      <description>Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu.</description>
      <category ID="48015"></category>
      <category>In enim justo</category>
  </record>
</records>
'''.trim()

app-engine-patch Database problems

2009-08-27T21:26:00.004-04:00

I've been using app-engine-patch to get some Django stuff running on Google AppEngine.

Several times my admin password has been reset or invalidated. On a couple of occasions I recreated the admin user from the link on the default page. After styling the site this wasn't possible.

I added the "create_admin_user" entry from the generated myapp/urls.py to the root level urls.py and manually entered the url. That worked.

Unexpected Groovy return value

2009-08-27T09:03:00.002-04:00

I like Groovy's multiline Strings. I use them all the time in my test cases. Usually I have a utility class that returns whatever content I need.

Yesterday I decided to do the whole test in Groovy. Inside my TestNG test case I had a method that returned some xml :

    String createInputFile(){
       return
       '''
           <xml><one>Hello</one><two>World!</two></xml>
       '''
   }

The output was null. Kind of silly of me. Adding a semicolon after the String didn't produce an output. Putting the opening quote on the same line as the return statement did.

I still don't miss semicolons though.

Practical Django Projects, coltrane weblog app and django-tagging

2009-07-16T23:10:00.003-04:00

I'm working through Practical Django Projects 2nd Edition.

There is a problem with Chapter 4's weblog application, "coltrane." I won't go into detail about the coltrane app, but in the event that you encounter the same problem I've posted a solution.

I downloaded django-tagging. The current version was 0.2.1.

I created a symlink from my projects directory to the downloaded directory.

I added "'taggigng'" to "INSTALLED_APPS" and tried to start the server. I got the following :

Validating models...
Unhandled exception in thread started by <function inner_run at 0x652c30>
Traceback (most recent call last):
File "/Library/Python/2.5/site-packages/django/core/management/commands/runserver.py", line 48, in inner_run
  self.validate(display_num_errors=True)
File "/Library/Python/2.5/site-packages/django/core/management/base.py", line 246, in validate
  num_errors = get_validation_errors(s, app)
File "/Library/Python/2.5/site-packages/django/core/management/validation.py", line 28, in get_validation_errors
  for (app_name, error) in get_app_errors().items():
File "/Library/Python/2.5/site-packages/django/db/models/loading.py", line 128, in get_app_errors
  self._populate()
File "/Library/Python/2.5/site-packages/django/db/models/loading.py", line 57, in _populate
  self.load_app(app_name, True)
File "/Library/Python/2.5/site-packages/django/db/models/loading.py", line 72, in load_app
  mod = __import__(app_name, {}, {}, ['models'])
File "/[path to django projects]/coltrane/models.py", line 6, in <module>
  from tagging.fields import TagField
File "/[path to django projects]/tagging/fields.py", line 10, in <module>
File "/[path to django projects]/tagging/models.py", line 9, in <module>
File "/[path to django projects]/tagging/managers.py", line 6, in <module>
ImportError: cannot import name parse_lookup

Sweet!

Turns out a lot of people have had this problem.

I checked out the current version from svn and recreated the symlink. All was well.

Django syncdb and create/drop

2009-07-16T17:50:00.002-04:00

Django's manage.py syncdb command doesn't drop/create. It is clearly stated in the documentation. Naturally it took me a while to figure that out.

There is an easy solution :

python ./Documents/DjangoWorkspace/cms/manage.py reset coltrane

I've used it a few times now.

Creating a build.xml for a JBoss Tools Seam project continued

2009-07-16T13:27:00.003-04:00

I posted earlier about a really nice blog entry outlining the differences between JBoss Tools and Seam-Gen generated projects. I grabbed the build.xml the author supplied, saving myself a few hours. However, I ran into an annoying hiccup.

I usually develop with an exploded .ear. The ant target,"explode," worked fine.

I ran the "deploy" target to verify before committing my latest changes. The app wouldn't start.

java.lang.NoClassDefFoundError: org/ajax4jsf/application/ViewHandlerWrapper
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at org.jboss.mx.loading.RepositoryClassLoader.findClassLocally(RepositoryClassLoader.java:682)
at org.jboss.mx.loading.RepositoryClassLoader.findClass(RepositoryClassLoader.java:662)
at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassLocally(RepositoryClassLoader.java:200)
at org.jboss.mx.loading.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:131)
at org.jboss.mx.loading.LoadMgr3.nextTask(LoadMgr3.java:399)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:527)
at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
at java.lang.Class.getConstructor0(Class.java:2671)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:825)
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:486)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:381)
at org.jboss.web.jsf.integration.config.JBossJSFConfigureListener.contextInitialized(JBossJSFConfigureListener.java:69)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3856)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4361)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:790)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:770)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:553)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.apache.catalina.core.StandardContext.init(StandardContext.java:5312)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.web.tomcat.service.TomcatDeployer.performDeployInternal(TomcatDeployer.java:301)
at org.jboss.web.tomcat.service.TomcatDeployer.performDeploy(TomcatDeployer.java:104)
at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:375)
at org.jboss.web.WebModule.startModule(WebModule.java:83)
at org.jboss.web.WebModule.startService(WebModule.java:61)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
at $Proxy0.start(Unknown Source)
at org.jboss.system.ServiceController.start(ServiceController.java:417)
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy44.start(Unknown Source)
at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:466)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
at org.jboss.wsf.container.jboss42.DeployerInterceptor.start(DeployerInterceptor.java:87)
at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy45.start(Unknown Source)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1015)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy9.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
at $Proxy0.start(Unknown Source)
at org.jboss.system.ServiceController.start(ServiceController.java:417)
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy4.start(Unknown Source)
at org.jboss.deployment.SARDeployer.start(SARDeployer.java:302)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy5.deploy(Unknown Source)
at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
at org.jboss.Main.boot(Main.java:200)
at org.jboss.Main$1.run(Main.java:508)
at java.lang.Thread.run(Thread.java:613)
IN

Nice.

I tried again with "explode," and everything was fine. I love these kinds of errors.

I uzipped the .ear file and diffed the resulting folder with the exploded ear folder.

The first difference I noticed was that the MANIFEST.MF in the .ear/META-INF did not contain a Class-Path entry while the exploded one contained an entry with "/lib/groovy-all,jar quartz.jar".

I added a manifest tag to the jar command of the build.xml. The result was :

    <target name="archive" depends="jar,war,ear"
                     description="Package the archives">
     <jar jarfile="${dist.dir}/${project.name}-ejb.jar" basedir="${jar.dir}" />
     <jar jarfile="${dist.dir}/${project.name}.war" basedir="${war.dir}" />
     <jar jarfile="${dist.dir}/${project.name}.ear">
         <manifest >
             <attribute name="Class-Path" value="lib/groovy-all.jar quartz.jar"/>
         </manifest>
         <fileset dir="${ear.dir}" />
         <fileset dir="${dist.dir}" >
             <include name="${project.name}-ejb.jar" />
             <include name="${project.name}.war" />
         </fileset>
     </jar>
 </target>

It didn't matter. I ran "deploy" and got the same error. So I checked the MANIFEST.MF in the ear. Sure enough the exploded one contained a "Class-Path" entry and the archived one didn't.

Adding the "Class-Path" attribute to the manifest fixed it. The result was :

    <target name="archive" depends="jar,war,ear"
                      description="Package the archives">
      <jar jarfile="${dist.dir}/${project.name}-ejb.jar" basedir="${jar.dir}" >
          <manifest>
               <attribute name="Class-Path" value="antlr-runtime.jar drools-compiler.jar drools-core.jar jboss-el.jar jboss-seam.jar jbpm-jpdl.jar mvel14.jar richfaces-api.jar" />
          </manifest>
      </jar>
      <jar jarfile="${dist.dir}/${project.name}.war" basedir="${war.dir}" />
      <jar jarfile="${dist.dir}/${project.name}.ear">
          <manifest >
              <attribute name="Class-Path" value="lib/groovy-all.jar quartz.jar"/>
          </manifest>
          <fileset dir="${ear.dir}" />
          <fileset dir="${dist.dir}" >
              <include name="${project.name}-ejb.jar" />
              <include name="${project.name}.war" />
          </fileset>
      </jar>
  </target>

Finally, back to real work.

Creating a build.xml for a JBoss Tools Seam project

2009-07-10T09:53:00.005-04:00

I usually use seam-gen to create my Seam projects. I have also been relying on a lot of JBoss Tools. JBoss Tools is a suite of Eclipse plugins.

I created my most recent project using the ide. The generated project does not contain a build.xml. This is of course a problem when you want to automate the build process.

There is a resolved JIRA issue so I imagine this won't be a problem much longer.

In the meantime this really nice blog entry contains a template build.xml.

Adjusting log4j in JBoss

2009-06-23T12:25:00.002-04:00

JBoss' log4j configuration can be found at [server root]/server/default/conf/jboss-log4j.xml.

There are two important parts to tweaking your logging, the appender settings and limit categories.

The appender settings start on line 64 for jboss-4.2.2.GA. The default is :

   <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Target" value="System.out"/>
     <param name="Threshold" value="INFO"/>

     <layout class="org.apache.log4j.PatternLayout">
        <!-- The default pattern: Date Priority [Category] Message\n -->
        <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n"/>
     </layout>
  </appender>

Mine look like this :

   <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Target" value="System.out"/>

     <layout class="org.apache.log4j.PatternLayout">
        <!-- The default pattern: Date Priority [Category] Message\n -->
        <param name="ConversionPattern" value="%-5p [%c{7}.%M] %m %n"/>

     </layout>
  </appender>

The difference is the ConversionPattern. Inside the brackets I use %c{7}.%M. That means that the class name will append 7 levels back, i.e. com.foo.bar.baz.buz.bam.SomeClass. The ".%M" appends the method name as well, i.e. com.foo.bar.baz.buz.bam.SomeClass.someMethod.

This way I can see the fully qualified class name and method.

Distilled Brilliance on Python Integer equality

2009-06-21T19:15:00.003-04:00

Excellent blog post on DZone this morning. I like the name of this blog, "Distilled Brilliance," too.

Safari 4

2009-06-10T20:34:00.003-04:00

If you are a Mac user run Software Update and get Safari 4 now.

This release is significantly faster in loading pages and url completion.

The new "Top Sites" feature is really cool. Apple cribbed it from Opera, but they've improved on it.

httpd.conf on Mac OSX

2009-05-30T15:13:00.005-04:00

On Mac OSX Apache's httpd.conf is located here : /private/etc/apache2.

I wanted to add .xhtml files to the list of default pages served. The solution is to simply add "index.xhtml" the "IfModule dir_module" entry on line 224:

<IfModule dir_module>
  DirectoryIndex index.html, index.xhtml
</IfModule>

Lorem ipsum generator

2009-05-28T09:07:00.002-04:00

I've used http://www.lipsum.com/ for generating lorem ipsum text for ages.

Thanks to this nettuts.com tutorial I discovered a new Lorem ipsum generator : http://www.blindtextgenerator.com/. It is nicely configurable.

Where is the site-packages directory on Mac OSX?

2009-04-28T22:04:00.003-04:00

/Library/Python/2.5/site-packages

Running :

 python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"

As suggested in the Django documentation displays the directory.

can not perform DDL/DML over objects in Recycle Bin

2009-04-28T14:15:00.003-04:00

I got this error today while trying to run jBPM drop/create scripts.

I didn't know Oracle had a recycle bin?

Theoretically the solution is to run, "purge recyclebin;" and wait. I say theoretically because my solution required dropping and recreating the user. Somehow my foreign keys didn't get moved to the recycle bin at the same time as my tables.

Additionally the "purge" command needs to be added to delete statements.

Useful Eclipse Plugins

2009-04-23T10:06:00.006-04:00

I changed laptops recently. While updating Eclipse I realized that I did not have a list of the update sites I use. I figured this place was as good as any.

JBoss Tools

JBoss tools wraps some other useful plugins like Hibernate. It also has functionality for Seam and JBoss AS administration.

TestNG

Seam leverages TestNG so the plugin is useful.

Groovy Eclipse Plugin

I have to use Groovy now.

Subclipse

Linkage error

2009-04-22T08:38:00.004-04:00

I got the following error after redeploying this morning :

java.lang.RuntimeException: Could not create Component: ClassName
 at org.jboss.seam.init.Initialization.addComponent(Initialization.java:1178)
 at org.jboss.seam.init.Initialization.installComponents(Initialization.java:1094)
 at org.jboss.seam.init.Initialization.init(Initialization.java:728)
 at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:35)
 at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3856)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4361)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:790)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:770)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:553)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296)
 at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
 at org.apache.catalina.core.StandardContext.init(StandardContext.java:5312)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296)
 at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
 at org.jboss.web.tomcat.service.TomcatDeployer.performDeployInternal(TomcatDeployer.java:301)
 at org.jboss.web.tomcat.service.TomcatDeployer.performDeploy(TomcatDeployer.java:104)
 at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:375)
 at org.jboss.web.WebModule.startModule(WebModule.java:83)
 at org.jboss.web.WebModule.startService(WebModule.java:61)
 at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
 at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
 at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
 at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
 at $Proxy0.start(Unknown Source)
 at org.jboss.system.ServiceController.start(ServiceController.java:417)
 at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
 at $Proxy44.start(Unknown Source)
 at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:466)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
 at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
 at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
 at org.jboss.wsf.container.jboss42.DeployerInterceptor.start(DeployerInterceptor.java:87)
 at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
 at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
 at $Proxy45.start(Unknown Source)
 at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
 at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1015)
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
 at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
 at $Proxy9.deploy(Unknown Source)
 at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
 at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:610)
 at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
 at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:274)
 at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:225)
Caused by: java.lang.LinkageError: loader constraints violated when linking fully/qualified/ClassName class
 at java.lang.Class.getDeclaredMethods0(Native Method)
 at java.lang.Class.privateGetDeclaredMethods(Class.java:2395)
 at java.lang.Class.privateGetPublicMethods(Class.java:2519)
 at java.lang.Class.getMethods(Class.java:1406)
 at org.jboss.seam.Component.hasAnnotation(Component.java:1125)
 at org.jboss.seam.Component.<init>(Component.java:219)
 at org.jboss.seam.Component.<init>(Component.java:206)
 at org.jboss.seam.init.Initialization.addComponent(Initialization.java:1162)
 ... 93 more

Of course the app was working when I showed up this morning and fired up JBoss.

This post on JBoss' wiki points out the problem. I liked this line from the wiki post, "Depending on how unlucky you may be, you might get a LinkageError or ClassCircularityError as well."

I checked the jboss-app.xml inside my ear and sure enough it was empty. I have no idea how that happened. However, the fix is simple. I just added the following :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss-app
  PUBLIC "-//JBoss//DTD J2EE Application 4.2//EN"
  "http://www.jboss.org/j2ee/dtd/jboss-app_4_2.dtd">

<jboss-app>
 <loader-repository>
    seam.jboss.org:loader=appName
 </loader-repository>
</jboss-app>

XmlUnit

2009-04-10T12:18:00.004-04:00

XmlUnit is an insanely great tool. It has saved me a ton of time in the past few weeks.

I log the differences from my unit test like this :

        XMLUnit.setIgnoreWhitespace(true);
      Diff xmlDiff = new Diff(expectedXml, result);

      DetailedDiff myDiff = new DetailedDiff(xmlDiff);
      List<Difference> allDifferences = myDiff.getAllDifferences();
      for(Difference d : allDifferences){
          log.debug("difference : " + d);
      }

The "result" string comes from a Groovy class using XmlSlurper. Also I usually generate "expectedXml" from a Groovy class.

illegal character: \64 when running Eclipse on Mac OSX

2009-02-16T15:11:00.003-05:00

I develop on a Mac. We use Luntbuild to automate our builds.

We added our new project into Luntbuild this morning. Luntbuild kicked this back :

[package name]/ChannelDetails.java:24: illegal character: \64
compile    [ javac ]    @Entity

Nice.

Our team has used OS X, Ubuntu, XP and Vista. We had not encountered this problem before.

Why wouldn't Eclipse just standardize on one character encoding?

The solution is to change the encoding by right clicking on the project and choose Properties -> Resource.

There are panels for "Text file encoding" and "New text file delimiter."

NetBeans 6.5 and svn+ssh on a Mac

2009-02-04T10:07:00.003-05:00

I've been playing with NetBeans occaisonally. I couldn't stand it a couple of years ago. However, after Sun's Tech Days in Atlanta I decided to give it a try.

Besides, I wanted to verify a clean checkout, build, test cycle.

We use svn over ssh at work. It was a headache to get this running with NetBeans. I didn't completely succeed either.

This post has a nice tutorial from a Rails perspective. I started here. I was able to checkout fine. But when I right clicked -> Subversion -> Update I got an error stating that ssh_askpass couldn't be found.

I did some digging around. This post is a great discussion about Leopard and ssh.

I checked out this tutorial from the NetBeans site. I was pretty annoyed that I hadn't found an answer so I clicked the update button. It worked.

I can't reproduce the error now. Right clicking the project and running an update has worked since I updated from the button.

So in the event that you hit this post while having the same problems, run an update from the button.

JBPM_ID_USER

2009-01-13T14:52:00.003-05:00

While helping a coworker set up jBPM I learned that part of the create script for jBPM 3.3.0.GA is missing. The user part. You can't log in without it.

This post from JBoss' forums has the solution.

Here's the missing create statements :

create table JBPM_ID_GROUP (ID_ number(19,0) not null, CLASS_ char(1 char) not null, NAME_ varchar2(255 char), TYPE_ varchar2(255 char), PARENT_ number(19,0), primary key (ID_));
create table JBPM_ID_MEMBERSHIP (ID_ number(19,0) not null, CLASS_ char(1 char) not null, NAME_ varchar2(255 char), ROLE_ varchar2(255 char), USER_ number(19,0), GROUP_ number(19,0), primary key (ID_));
create table JBPM_ID_PERMISSIONS (ENTITY_ number(19,0) not null, CLASS_ varchar2(255 char), NAME_ varchar2(255 char), ACTION_ varchar2(255 char));
create table JBPM_ID_USER (ID_ number(19,0) not null, CLASS_ char(1 char) not null, NAME_ varchar2(255 char), EMAIL_ varchar2(255 char), PASSWORD_ varchar2(255 char), primary key (ID_));
create table JBPM_JOB (ID_ number(19,0) not null, CLASS_ char(1 char) not null, VERSION_ number(10,0) not null, DUEDATE_ timestamp, PROCESSINSTANCE_ number(19,0), TOKEN_ number(19,0), TASKINSTANCE_ number(19,0), ISSUSPENDED_ number(1,0), ISEXCLUSIVE_ number(1,0), LOCKOWNER_ varchar2(255 char), LOCKTIME_ timestamp, EXCEPTION_ varchar2(4000 char), RETRIES_ number(10,0), NAME_ varchar2(255 char), REPEAT_ varchar2(255 char), TRANSITIONNAME_ varchar2(255 char), ACTION_ number(19,0), GRAPHELEMENTTYPE_ varchar2(255 char), GRAPHELEMENT_ number(19,0), NODE_ number(19,0), primary key (ID_));

For the jbpm-console app to work run the following inserts as well :

INSERT INTO JBPM_ID_USER VALUES(1,'U','user','user@sample.domain','user');
INSERT INTO JBPM_ID_USER VALUES(2,'U','manager','manager@sample.domain','manager');
INSERT INTO JBPM_ID_USER VALUES(3,'U','admin','admin@sample.domain','admin');
INSERT INTO JBPM_ID_USER VALUES(4,'U','shipper','shipper@sample.domain','shipper');
INSERT INTO JBPM_ID_GROUP VALUES(1,'G','sales','organisation',NULL);
INSERT INTO JBPM_ID_GROUP VALUES(2,'G','manager','security-role',NULL);
INSERT INTO JBPM_ID_GROUP VALUES(3,'G','hr','organisation',NULL);
INSERT INTO JBPM_ID_GROUP VALUES(4,'G','admin','security-role',NULL);
INSERT INTO JBPM_ID_GROUP VALUES(5,'G','user','security-role',NULL);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(1,'M',NULL,NULL,2,2);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(2,'M',NULL,NULL,2,4);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(3,'M',NULL,NULL,3,4);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(4,'M',NULL,NULL,2,5);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(5,'M',NULL,NULL,1,5);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(6,'M',NULL,NULL,4,3);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(7,'M',NULL,NULL,4,5);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(8,'M',NULL,NULL,3,5);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(9,'M',NULL,NULL,3,3);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(10,'M',NULL,NULL,2,3);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(11,'M',NULL,'boss',2,1);
INSERT INTO JBPM_ID_MEMBERSHIP VALUES(12,'M',NULL,NULL,1,1);

Seam-Gen and the TestNG plugin

2009-01-06T09:04:00.002-05:00

Here's an interesting heads up to running SeamTest classes inside Eclipse.

I was having some problems getting my tests, extending SeamTest, to run with the Eclipse TestNG plugin. I found this post on seamframework.org which states,

"the Eclipse Run dialog to start the TestNG test will only be viable if you have a Seam Web Project created from JBoss Tools"

I used Seam-Gen instead of JBoss Tools for my project. I ran the tests from ant and they worked.

Seam 2.1.0 RefCard from Dzone

2009-01-05T10:44:00.003-05:00

DZone has a refcard for Seam 2.1.0. Registration is required for download.

I've found these things to be useful.

SeamTest and Eclipse TestNG plugin

2009-01-02T13:47:00.002-05:00

I encountered a small problem running a new SeamTest with Eclipse' TestNG plugin. The error was :

DEBUG [main] (KernelFactory.java:86) - Starting JBoss Kernel construction...
DEBUG [main] (KernelFactory.java:112) - Completed JBoss Kernel construction.  Duration: 381 milliseconds
FAILED CONFIGURATION: @BeforeSuite startSeam
org.jboss.deployers.spi.DeploymentException: Unable to find bootstrap file: conf/bootstrap-beans.xml in classpath
  at org.jboss.embedded.Bootstrap.bootstrap(Bootstrap.java:181)
  at org.jboss.embedded.Bootstrap.bootstrap(Bootstrap.java:195)
  at org.jboss.seam.mock.EmbeddedBootstrap.startAndDeployResources(EmbeddedBootstrap.java:11)
  at org.jboss.seam.mock.AbstractSeamTest.startJbossEmbeddedIfNecessary(AbstractSeamTest.java:1025)
  at org.jboss.seam.mock.AbstractSeamTest.startSeam(AbstractSeamTest.java:916)
  at org.jboss.seam.mock.SeamTest.startSeam(SeamTest.java:58)
... Removed 15 stack frames

The solution is pretty simple.

Open up the run configuration (the arrow next to the run button and choose "Run Configurations...")
The most recently run test should be highlighted. If not select it.
Choose the "Classpath" tab in the right side of the pane.
Click "User Entries" which should be in the center pane.
Click "Advanced' -> "Add Folders" -> OK and navigate to the "bootstrap" folder.
Click "Add Jars" and navigate to the "lib/test" folder and add all three jars.

Ok.

jBPM 3.3.0.GA and JBoss AS 4.2.3.GA

2008-12-29T08:59:00.004-05:00

The ops guys had already installed JBoss 4.2.3.GA on our servers. In an attempt to submit as few help desk requests as possible I decided to port jBPM 3.3.0.GA to JBoss instead of asking them to roll back.

The new docs say,

"The jbpm directory
"When jBPM is installed on a server configuration in JBoss, only the jbpm directory is added to the deploy directory and all components will be deployed under that directory. No other files of JBoss are changed or added outside that directory. "

I figured that would be a good place to start.

I copied the jbpm folder from the 3.3.0.GA distro to a clean JBoss 4.2.3.GA that I built from source.

I opened my browser and checked, "http://localhost:8080/jbpm-console." I tried logging in with "manager/manager." I got the error, "Login failed. Invalid user name or password. "

I added the following to $JBOSS_INSTALL/server/default/conf/login-congif.xml :

<application-policy name = "jbpm">
       <authentication>
           <login-module code="org.jboss.security.auth.spi.DatabaseServerLoginModule"
               flag="required">
               <module-option name="dsJndiName">java:/JbpmDS</module-option>
               <module-option name="principalsQuery">
                   SELECT PASSWORD_ FROM JBPM_ID_USER WHERE NAME_=?
               </module-option>
               <module-option name="rolesQuery">
                   SELECT g.NAME_ ,'Roles'
                   FROM JBPM_ID_USER u,
                   JBPM_ID_MEMBERSHIP m,
                   JBPM_ID_GROUP g
                   WHERE g.TYPE_='security-role'
                   AND m.GROUP_ = g.ID_
                   AND m.USER_ = u.ID_
                   AND u.NAME_=?
               </module-option>
           </login-module>
       </authentication>
   </application-policy>

When I restarted I could log in fine. I saw the processes that I had been working on.

Adding jBPM support to a Seam app

2008-12-15T16:15:00.003-05:00

I created my app with seam-gen. While adding support for jBPM, I got the following error :

Caused by: org.dom4j.DocumentException: Error on line 29 of document  : The prefix "bpm" for element "bpm:jbpm" is not bound. Nested exception: The prefix "bpm" for element "bpm:jbpm" is not bound.
 at org.dom4j.io.SAXReader.read(SAXReader.java:482)
 at org.dom4j.io.SAXReader.read(SAXReader.java:343)
 at org.jboss.seam.util.XML.getRootElement(XML.java:24)
 at org.jboss.seam.init.Initialization.initComponentsFromXmlDocument(Initialization.java:217)

The fix was to add the following to <components> declaration in the components.xml :


xmlns:bpm="http://jboss.com/products/seam/bpm"

Here's a nice tutorial from mastertheboss on adding jBPM support to a Seam app.

Seam Tip Number 5

2008-12-04T23:06:00.003-05:00

If you ever copy and paste a project directory be sure to change the seam-gen.properties file.

I got a new MacBook Pro. I copied my Eclipse workspaces over of course.

I made some changes to the entities in a project. I then opened a terminal and ran "seam generate-ui." I got a FileNotFound exception in build.xml line 1154 . Something was still pointing to the C:/ drive.

Inside the root Eclipse project directory there is a seam-gen.properties file. Changing that fixes anything.

jBPM 3.3.0.GA and Oracle 10g Express Server

2008-12-04T10:02:00.003-05:00

I grabbed the jBPM 3.3.0.GA release. I got a process deployed under hsqldb to make sure everything worked. The next step is to switch out hsqldb for Oracle XE. I run Oracle XE under parallels.

The user guide chapter 7 lays out the changes.

One "gotcha: I had was the type mapping in the datasource. "Oracle9i" was the appropriate setting. It took me a couple of tries.

The datasource, located in /jbpm-3.3.0.GA/jboss-4.2.2.GA/server/default/deploy/jbpm, I ended up with :

<?xml version="1.0" encoding="UTF-8"?>

<!-- ===================================================================== -->
<!--                                                                       -->
<!--  JBoss Server Configuration                                           -->
<!--                                                                       -->
<!-- ===================================================================== -->

<!-- $Id: oracle-ds.xml 71535 2008-04-01 07:05:03Z adrian@jboss.org $ -->
<!-- ==================================================================== -->
<!--  Datasource config for Oracle originally from Steven Coy             -->
<!-- ==================================================================== -->


<datasources>
<local-tx-datasource>
 <jndi-name>JbpmDS</jndi-name>
 <connection-url>jdbc:oracle:thin:@IP_ADDRESS:1521:xe</connection-url>
 <!--

     Here are a couple of the possible OCI configurations.
     For more information, see http://otn.oracle.com/docs/products/oracle9i/doc_library/release2/java.920/a96654/toc.htm

 <connection-url>jdbc:oracle:oci:@youroracle-tns-name</connection-url>
     or
 <connection-url>jdbc:oracle:oci:@(description=(address=(host=youroraclehost)(protocol=tcp)(port=1521))(connect_data=(SERVICE_NAME=yourservicename)))</connection-url>

     Clearly, its better to have TNS set up properly.
  -->
 <driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
 <user-name>USER_NAME</user-name>
 <password>PASSWORD</password>
 <!-- Uses the pingDatabase method to check a connection is still valid before handing it out from the pool -->
 <!--valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name-->
 <!-- Checks the Oracle error codes and messages for fatal errors -->
 <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name>
     <!-- sql to call when connection is created
     <new-connection-sql>some arbitrary sql</new-connection-sql>
     -->

     <!-- sql to call on an existing pooled connection when it is obtained from pool - the OracleValidConnectionChecker is prefered
     <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
     -->

   <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
   <metadata>
      <type-mapping>Oracle9i</type-mapping>
   </metadata>
</local-tx-datasource>

</datasources>

The hibernate.cfg.xml, located in /jbpm-3.3.0.GA/jboss-4.2.2.GA/server/default/deploy/jbpm/jbpm-service.sar, I ended up with :

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>

  <!-- hibernate dialect -->
  <!--
  <property name="hibernate.dialect">org.hibernate.dialect.HSQLDialect</property>
  -->
  <property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property>

  <!-- JDBC connection properties (begin) ===
  <property name="hibernate.connection.driver_class">org.hsqldb.jdbcDriver</property>
  <property name="hibernate.connection.url">jdbc:hsqldb:mem:jbpm</property>
  <property name="hibernate.connection.username">sa</property>
  <property name="hibernate.connection.password"></property>
  ==== JDBC connection properties (end) -->


  <!-- DataSource properties (begin)
  <property name="hibernate.connection.datasource">java:comp/env/jdbc/JbpmDataSource</property>
  -->
  <property name="hibernate.connection.datasource">java:/JbpmDS</property>
  <!-- DataSource properties (end) -->

  <!-- JTA transaction properties (begin) -->
  <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
  <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
  <!-- JTA transaction properties (end) -->

  <!-- CMT transaction properties (begin) ===
  <property name="hibernate.transaction.factory_class">org.hibernate.transaction.CMTTransactionFactory</property>
  <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
  ==== CMT transaction properties (end) -->

  <!-- ################################### -->
  <!-- # common settings                 # -->
  <!-- ################################### -->

  <!-- Automatic schema creation (begin) ===
  <property name="hibernate.hbm2ddl.auto">create</property>
  ==== Automatic schema creation (end) -->

  <!-- Simple memory-only cache -->
  <property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property>

  <!-- logging properties -->
  <property name="hibernate.format_sql">true</property>
  <property name="hibernate.use_sql_comments">true</property>

  <!-- ############################################ -->
  <!-- # mapping files with external dependencies # -->
  <!-- ############################################ -->

  <!-- Additional mappings defined per module go here -->
  <mapping resource="hibernate.extra.hbm.xml" />
  <mapping resource="hibernate.identity.hbm.xml" />


 <!-- ###################### -->
 <!-- # jbpm mapping files # -->
 <!-- ###################### -->

 <!-- hql queries and type defs -->
 <mapping resource="org/jbpm/db/hibernate.queries.hbm.xml" />
 <!-- hql queries used in simulation for querying historical data
      uncomment if you want to use the GetSimulationInputCommand
      or maybe you also want to use the queries yourself
      be patient: the queries need the stddev function to be enabled in your dialect
      more information on this can be found here: http://www.camunda.com/business_process_simulation_news/mysql_and_stddev.html -->
 <!--
 <mapping resource="org/jbpm/sim/bam/hibernate.queries.hbm.xml" />
 -->

 <!-- graph.action mapping files -->
 <mapping resource="org/jbpm/graph/action/MailAction.hbm.xml"/>

 <!-- graph.def mapping files -->
 <mapping resource="org/jbpm/graph/def/ProcessDefinition.hbm.xml"/>
 <mapping resource="org/jbpm/graph/def/Node.hbm.xml"/>
 <mapping resource="org/jbpm/graph/def/Transition.hbm.xml"/>
 <mapping resource="org/jbpm/graph/def/Event.hbm.xml"/>
 <mapping resource="org/jbpm/graph/def/Action.hbm.xml"/>
 <mapping resource="org/jbpm/graph/def/SuperState.hbm.xml"/>
 <mapping resource="org/jbpm/graph/def/ExceptionHandler.hbm.xml"/>
 <mapping resource="org/jbpm/instantiation/Delegation.hbm.xml"/>

 <!-- ############################################ -->
 <!-- # another mapping file with external dependencies # -->
 <!-- ############################################ -->
 <!-- following mapping file has a dependency on   -->
 <!-- 'bsh-{version}.jar'.                         -->
 <!-- uncomment this if you don't have bsh on your -->
 <!-- classpath.  you won't be able to use the     -->
 <!-- script element in process definition files   -->
 <!-- has to be defined below org/jbpm/graph/def/Action.hbm.xml -->
 <!-- due to the inline collection-cache elements below -->
 <mapping resource="org/jbpm/graph/action/Script.hbm.xml"/>

 <!-- graph.node mapping files -->
 <mapping resource="org/jbpm/graph/node/StartState.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/EndState.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/ProcessState.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/Decision.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/Fork.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/Join.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/MailNode.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/State.hbm.xml"/>
 <mapping resource="org/jbpm/graph/node/TaskNode.hbm.xml"/>

 <!-- context.def mapping files -->
 <mapping resource="org/jbpm/context/def/ContextDefinition.hbm.xml"/>
 <mapping resource="org/jbpm/context/def/VariableAccess.hbm.xml"/>

 <!-- bytes mapping files -->
 <mapping resource="org/jbpm/bytes/ByteArray.hbm.xml"/>

 <!-- module.def mapping files -->
 <mapping resource="org/jbpm/module/def/ModuleDefinition.hbm.xml"/>

 <!-- file.def mapping files -->
 <mapping resource="org/jbpm/file/def/FileDefinition.hbm.xml"/>

 <!-- taskmgmt.def mapping files -->
 <mapping resource="org/jbpm/taskmgmt/def/TaskMgmtDefinition.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/def/Swimlane.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/def/Task.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/def/TaskController.hbm.xml"/>

 <!-- scheduler.def mapping files -->
 <mapping resource="org/jbpm/scheduler/def/CreateTimerAction.hbm.xml"/>
 <mapping resource="org/jbpm/scheduler/def/CancelTimerAction.hbm.xml"/>

 <!-- graph.exe mapping files -->
 <mapping resource="org/jbpm/graph/exe/Comment.hbm.xml"/>
 <mapping resource="org/jbpm/graph/exe/ProcessInstance.hbm.xml"/>
 <mapping resource="org/jbpm/graph/exe/Token.hbm.xml"/>
 <mapping resource="org/jbpm/graph/exe/RuntimeAction.hbm.xml"/>

 <!-- module.exe mapping files -->
 <mapping resource="org/jbpm/module/exe/ModuleInstance.hbm.xml"/>

 <!-- context.exe mapping files -->
 <mapping resource="org/jbpm/context/exe/ContextInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/TokenVariableMap.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/VariableInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/ByteArrayInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/DateInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/DoubleInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/HibernateLongInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/HibernateStringInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/LongInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/NullInstance.hbm.xml"/>
 <mapping resource="org/jbpm/context/exe/variableinstance/StringInstance.hbm.xml"/>

 <!-- job mapping files -->
 <mapping resource="org/jbpm/job/Job.hbm.xml"/>
 <mapping resource="org/jbpm/job/Timer.hbm.xml"/>
 <mapping resource="org/jbpm/job/ExecuteNodeJob.hbm.xml"/>
 <mapping resource="org/jbpm/job/ExecuteActionJob.hbm.xml"/>
 <mapping resource="org/jbpm/job/CleanUpProcessJob.hbm.xml"/>

 <!-- taskmgmt.exe mapping files -->
 <mapping resource="org/jbpm/taskmgmt/exe/TaskMgmtInstance.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/exe/TaskInstance.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/exe/PooledActor.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/exe/SwimlaneInstance.hbm.xml"/>

 <!-- logging mapping files -->
 <mapping resource="org/jbpm/logging/log/ProcessLog.hbm.xml"/>
 <mapping resource="org/jbpm/logging/log/MessageLog.hbm.xml"/>
 <mapping resource="org/jbpm/logging/log/CompositeLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/ActionLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/NodeLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/ProcessInstanceCreateLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/ProcessInstanceEndLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/ProcessStateLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/SignalLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/TokenCreateLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/TokenEndLog.hbm.xml"/>
 <mapping resource="org/jbpm/graph/log/TransitionLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/VariableLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/VariableCreateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/VariableDeleteLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/VariableUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/ByteArrayUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/DateUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/DoubleUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/HibernateLongUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/HibernateStringUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/LongUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/context/log/variableinstance/StringUpdateLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/TaskLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/TaskCreateLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/TaskAssignLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/TaskEndLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/SwimlaneLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/SwimlaneCreateLog.hbm.xml"/>
 <mapping resource="org/jbpm/taskmgmt/log/SwimlaneAssignLog.hbm.xml"/>

<!-- ################################### -->
<!-- # cache settings                  # -->
<!-- # strategy="nonstrict-read-write" # -->
<!-- # can be used with hibernate.cache.provider_class=org.hibernate.cache.HashtableCacheProvider # -->
<!-- ################################### -->

<class-cache class="org.jbpm.context.def.VariableAccess" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.file.def.FileDefinition.processFiles" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.graph.action.Script.variableAccesses" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.graph.def.Action" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.graph.def.Event" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Event.actions" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.graph.def.ExceptionHandler" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.ExceptionHandler.actions" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.graph.def.Node" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Node.events" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Node.exceptionHandlers" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Node.leavingTransitions" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Node.arrivingTransitions" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.graph.def.ProcessDefinition" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.ProcessDefinition.events" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.ProcessDefinition.exceptionHandlers" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.ProcessDefinition.nodes" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.ProcessDefinition.actions" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.ProcessDefinition.definitions" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.graph.def.SuperState.nodes" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.graph.def.Transition" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Transition.events" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.graph.def.Transition.exceptionHandlers" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.graph.node.Decision.decisionConditions" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.graph.node.ProcessState.variableAccesses" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.graph.node.TaskNode.tasks" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.instantiation.Delegation" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.module.def.ModuleDefinition" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.taskmgmt.def.Swimlane.tasks" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.taskmgmt.def.TaskController" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.taskmgmt.def.TaskController.variableAccesses" usage="nonstrict-read-write" />

<class-cache class="org.jbpm.taskmgmt.def.Task" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.taskmgmt.def.Task.events" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.taskmgmt.def.Task.exceptionHandlers" usage="nonstrict-read-write" />

<collection-cache collection="org.jbpm.taskmgmt.def.TaskMgmtDefinition.swimlanes" usage="nonstrict-read-write" />
<collection-cache collection="org.jbpm.taskmgmt.def.TaskMgmtDefinition.tasks" usage="nonstrict-read-write" />


</session-factory>
</hibernate-configuration>

Unsigned JUnit 4 in JBoss Developer Studio

2008-12-03T09:54:00.003-05:00

Running a JUnit4 test I got the following error :


junit.framework.JUnit4TestCaseFacade"'s signer information does not match signer information of other classes in the same package

Apparently other people have had the same problem with Europa.

The solution was easy. I downloaded JUnit4 jars and created a new User Library with them. I then added my new user library to the project and the run configuration.

To add the new library to the project :

I downloaded Junit4 and its' sources.
I put both jars in "/Users/[USER_NAME]/Java."
I control-clicked on the prject name and chose "Build Path -> Configure Build Path."
Under "Libraries" I removed the JUnit 4 library.
I clicked "Add Library -> User Library -> Next -> User Libraries -> New" and created a Library called "JUnit4 Local."
I added the jars I downloaded.

To add the new library to the run configuration :

Run Button -> Run Configurations
The most recently run test is highlighted. Choose the one that needs to be changed.
Click the "Classpath" tab.
Expand "User Entries"
Remove the existing JUnit4 library.
Add the user library.

Building jBPM 3.3.0.GA From Source

2008-11-27T19:30:00.009-05:00

The reason for this extremely long post is simply to save someone time in the event they are having the same problems. The errors I got are copied here in their entirety in the even that someone is googling them. The moral of this story is to update after checkout!

jBPM 3.3.0.GA is out!

Sweet. I'll build it from source.

First, I checked it out from the svn repository. I used Eclipse and checked it out as a project.

Second, control click (new MacBook Pro!) on the pom.xml in the root directory. I chose "run as -> Maven package" That didn't work.

[INFO] [jar:jar]
[INFO] Building jar: [ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/core/target/jbpm-jpdl-3.3.1-SNAPSHOT.jar
[INFO] [assembly:single]
[INFO] Reading assembly descriptor: [ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/core/scripts/assembly-config.xml
Exception in thread "main" java.lang.NullPointerException
at org.apache.maven.plugin.assembly.archive.ManifestCreationFinalizer.getVirtualFiles(ManifestCreationFinalizer.java:99)
at org.codehaus.plexus.archiver.AbstractArchiver.hasVirtualFiles(AbstractArchiver.java:546)
at org.codehaus.plexus.archiver.zip.AbstractZipArchiver.createArchiveMain(AbstractZipArchiver.java:258)
at org.codehaus.plexus.archiver.zip.AbstractZipArchiver.execute(AbstractZipArchiver.java:242)
at org.codehaus.plexus.archiver.AbstractArchiver.createArchive(AbstractArchiver.java:513)
at org.apache.maven.plugin.assembly.archive.DefaultAssemblyArchiver.createArchive(DefaultAssemblyArchiver.java:103)
at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:278)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:579)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:498)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmentForProject(DefaultLifecycleExecutor.java:265)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:191)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:149)
at org.apache.maven.DefaultMaven.execute_aroundBody0(DefaultMaven.java:223)
at org.apache.maven.DefaultMaven.execute_aroundBody1$advice(DefaultMaven.java:304)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:1)
at org.apache.maven.embedder.MavenEmbedder.execute_aroundBody2(MavenEmbedder.java:904)
at org.apache.maven.embedder.MavenEmbedder.execute_aroundBody3$advice(MavenEmbedder.java:304)
at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:1)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:176)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:63)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:52)

I don't have a lot of experience with Maven. I like the idea of Maven more than its actuality. The repository is a great idea. But I have found it painful to use.

I'm using MyEclipse at the moment. I've used for years now; although, I had switched to Eclipse with the JBoss Tools for the past few months. I opened the run dialog () and created a new Maven run profile.

I checked "Debug Output" and ran it again. This time I got a lot more information.

[INFO] Reading assembly descriptor: [ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/core/scripts/assembly-config.xml
[DEBUG] No dependency sets specified.
[DEBUG] FileSet[/] dir perms: 40755 file perms: 100644
[DEBUG] The archive base directory is 'null'
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-antrun-plugin:1.1@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-antrun-plugin:1.1@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-site-plugin:2.0-beta-6@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-site-plugin:2.0-beta-6@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-resources-plugin:2.2@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-resources-plugin:2.2@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-surefire-plugin:2.4.2@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-surefire-plugin:2.4.2@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-1@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-1@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-compiler-plugin:2.0.2.SP1@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-compiler-plugin:2.0.2.SP1@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-source-plugin:2.0.4@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-source-plugin:2.0.4@48/thread:main
[DEBUG] disposing managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-jar-plugin:2.2@48/thread:main
[DEBUG] dissociating all components from managed ClassRealm with id: /plugins/org.apache.maven.plugins:maven-jar-plugin:2.2@48/thread:main
Exception in thread "main" java.lang.NullPointerException
at org.apache.maven.plugin.assembly.archive.ManifestCreationFinalizer.getVirtualFiles(ManifestCreationFinalizer.java:99)
at org.codehaus.plexus.archiver.AbstractArchiver.hasVirtualFiles(AbstractArchiver.java:546)
at org.codehaus.plexus.archiver.zip.AbstractZipArchiver.createArchiveMain(AbstractZipArchiver.java:258)
at org.codehaus.plexus.archiver.zip.AbstractZipArchiver.execute(AbstractZipArchiver.java:242)
at org.codehaus.plexus.archiver.AbstractArchiver.createArchive(AbstractArchiver.java:513)
at org.apache.maven.plugin.assembly.archive.DefaultAssemblyArchiver.createArchive(DefaultAssemblyArchiver.java:103)
at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:278)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:579)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:498)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmentForProject(DefaultLifecycleExecutor.java:265)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:191)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:149)
at org.apache.maven.DefaultMaven.execute_aroundBody0(DefaultMaven.java:223)
at org.apache.maven.DefaultMaven.execute_aroundBody1$advice(DefaultMaven.java:304)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:1)
at org.apache.maven.embedder.MavenEmbedder.execute_aroundBody2(MavenEmbedder.java:904)
at org.apache.maven.embedder.MavenEmbedder.execute_aroundBody3$advice(MavenEmbedder.java:304)
at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:1)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:176)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:63)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:52)

The line, "The archive base directory is 'null'" didn't look good.

I decided to try from the command line. This time there were test failures:

Running org.jbpm.enterprise.jta.JtaDbPersistenceTest
java.lang.RuntimeException: Cannot obtain MBeanServerConnection using jndi props: {java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.provider.url=localhost:1099, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces}
 at org.jboss.bpm.api.test.IntegrationTestHelper.getServer(IntegrationTestHelper.java:131)
 at org.jboss.bpm.api.test.IntegrationTestHelper.getDeployer(IntegrationTestHelper.java:139)
 at org.jboss.bpm.api.test.IntegrationTestHelper.deploy(IntegrationTestHelper.java:58)
 at org.jboss.bpm.api.test.IntegrationTestHelper.deploy(IntegrationTestHelper.java:53)
 at org.jboss.bpm.api.test.IntegrationTestSetup.setUp(IntegrationTestSetup.java:105)
 at junit.extensions.TestSetup$1.protect(TestSetup.java:18)
 at junit.framework.TestResult.runProtected(TestResult.java:124)
 at junit.extensions.TestSetup.run(TestSetup.java:23)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
 at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
 at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
 at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:338)
 at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:997)
Caused by: javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]]
 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1562)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:634)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
 at javax.naming.InitialContext.lookup(InitialContext.java:351)
 at org.jboss.bpm.api.test.IntegrationTestHelper.getServer(IntegrationTestHelper.java:127)
 ... 21 more
Caused by: javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]
 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:274)
 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1533)
 ... 25 more
Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]
 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:248)
 ... 26 more
Caused by: java.net.ConnectException: Connection refused
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:432)
 at java.net.Socket.connect(Socket.java:520)
 at java.net.Socket.connect(Socket.java:470)
 at java.net.Socket.<init>(Socket.java:367)
 at java.net.Socket.<init>(Socket.java:267)
 at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:84)
 at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:77)
 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:244)
 ... 26 more
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 11.054 sec <<< FAILURE!
Running org.jbpm.enterprise.config.AppServerConfigurationsTest
java.lang.RuntimeException: Cannot obtain MBeanServerConnection using jndi props: {java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.provider.url=localhost:1099, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces}
 at org.jboss.bpm.api.test.IntegrationTestHelper.getServer(IntegrationTestHelper.java:131)
 at org.jboss.bpm.api.test.IntegrationTestHelper.getDeployer(IntegrationTestHelper.java:139)
 at org.jboss.bpm.api.test.IntegrationTestHelper.deploy(IntegrationTestHelper.java:58)
 at org.jboss.bpm.api.test.IntegrationTestHelper.deploy(IntegrationTestHelper.java:53)
 at org.jboss.bpm.api.test.IntegrationTestSetup.setUp(IntegrationTestSetup.java:105)
 at junit.extensions.TestSetup$1.protect(TestSetup.java:18)
 at junit.framework.TestResult.runProtected(TestResult.java:124)
 at junit.extensions.TestSetup.run(TestSetup.java:23)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
 at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
 at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
 at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:338)
 at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:997)
Caused by: javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]]
 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1562)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:634)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
 at javax.naming.InitialContext.lookup(InitialContext.java:351)
 at org.jboss.bpm.api.test.IntegrationTestHelper.getServer(IntegrationTestHelper.java:127)
 ... 21 more
Caused by: javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]
 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:274)
 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1533)
 ... 25 more
Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]
 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:248)
 ... 26 more
Caused by: java.net.ConnectException: Connection refused
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:432)
 at java.net.Socket.connect(Socket.java:520)
 at java.net.Socket.connect(Socket.java:470)
 at java.net.Socket.<init>(Socket.java:367)
 at java.net.Socket.<init>(Socket.java:267)
 at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:84)
 at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:77)
 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:244)
 ... 26 more
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 10.082 sec <<< FAILURE!
Running org.jbpm.enterprise.config.ContainerProvidedJarsTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 5.019 sec <<< FAILURE!

Results :

Tests in error:
org.jbpm.enterprise.jta.JtaDbPersistenceTest
org.jbpm.enterprise.config.AppServerConfigurationsTest
testDependencies(org.jbpm.enterprise.config.ContainerProvidedJarsTest)

Tests run: 3, Failures: 0, Errors: 3, Skipped: 0

[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] There are test failures.

I started JBoss and try again. Same thing.

I tried by skipping the tests. That didn't work either. I got a compile error.

I changed into the core directory thinking that maybe I had to compile it in a certain order. I was able to compile the core. Finally!

Back to the root directory to try again. Nope.

I changed into the identity directory. I thought that building individually in the order listed by Maven's output might help me isolate the problem.

Unfortunately there was a missing dependency, jbpm-jpdl-3.3.1-SNAPSHOT.jar. That's the artifact that I was able to build in core directory.

I had run "package" not "install." So I changed back into the core directory and ran "install." I forgot to add the flag for skipping tests. This time the tests all passed. Hmm.

So back into the identity directory. This time no problem.

I changed into the "db" directory. It installed fine.

So did the "enterprise" directory.

So did the "simulation" directory.

The "integration" directory failed :

INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Compilation failure

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/ExpressionEvaluator.java:[29,32] cannot find symbol
symbol  : class Token
location: package org.jboss.bpm.api.client

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/ExpressionEvaluator.java:[55,35] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.runtime.ExpressionEvaluator

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/NodeExecuteInterceptor.java:[26,32] cannot find symbol
symbol  : class Token
location: package org.jboss.bpm.api.client

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/RuntimeContext.java:[29,32] cannot find symbol
symbol  : class Token
location: package org.jboss.bpm.api.client

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/RuntimeContext.java:[42,10] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.runtime.RuntimeContext

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/RuntimeContext.java:[44,9] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.runtime.RuntimeContext

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/RuntimeContext.java:[49,23] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.runtime.RuntimeContext

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ExclusiveGatewayImpl.java:[26,32] cannot find symbol
symbol  : class Token
location: package org.jboss.bpm.api.client

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[33,32] cannot find symbol
symbol  : class Token
location: package org.jboss.bpm.api.client

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[34,38] package org.jboss.bpm.api.client.Token does not exist

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[146,9] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[152,9] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[181,9] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[186,13] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[191,34] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[191,14] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[34,32] cannot find symbol
symbol  : class Token
location: package org.jboss.bpm.api.client

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[52,34] cannot find symbol
symbol: class Token
public class TokenImpl implements Token

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[96,9] cannot find symbol
symbol  : class TokenStatus
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[107,13] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[137,9] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[144,9] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/runtime/NodeExecuteInterceptor.java:[39,4] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.runtime.NodeExecuteInterceptor

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ExclusiveGatewayImpl.java:[75,6] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ExclusiveGatewayImpl.ExclusiveGatewayDecisionHandler

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[51,7] org.jbpm.integration.model.ProcessImpl is not abstract and does not override abstract method cancel() in org.jboss.bpm.api.model.Process

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[91,4] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[94,40] cannot find symbol
symbol  : variable TokenStatus
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[161,4] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[193,8] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[193,36] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/model/ProcessImpl.java:[197,11] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.model.ProcessImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[98,4] cannot find symbol
symbol  : class TokenStatus
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[98,25] cannot find symbol
symbol  : variable TokenStatus
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[101,15] cannot find symbol
symbol  : variable TokenStatus
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[109,8] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.client.TokenImpl

[ECLIPSE WORKSPACE DIRECTORY]/jbpm3/modules/integration/spec/src/main/java/org/jbpm/integration/client/TokenImpl.java:[109,41] cannot find symbol
symbol  : class Token
location: class org.jbpm.integration.client.TokenImpl


[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 12 seconds
[INFO] Finished at: Thu Nov 27 20:40:08 EST 2008
[INFO] Final Memory: 24M/44M
[INFO] ------------------------------------------------------------------------

Getting pretty frustrated, I control clicked the project and ran "Team -> Synchronize with Repository." There were a bunch of updates. The classes I was missing were included. I have no idea how that happened.

I updated and re-ran maven. Success. I changed to the root directory and ran "package" again. Success.

How the hell was I missing sources? Oh well.

Format My Source Code for Blogging

2008-11-26T11:56:00.002-05:00

Here's a really nice utility :

Format My Source Code for Blogging

The results will be all over my blog!

OSX and JAVA_HOME

2008-11-25T13:13:00.004-05:00

Trying to use seam-gen on my new MacBook Pro I got the following error :

The JAVA_HOME environment variable is not set
Please point it to a valid JDK installation

So I ran :

JAVA_HOME=/Library/Java/Home

This article from Apple's site suggested that the home should always point to that symlink. Unfortunately I got the same error.

Running :

java -version

showed only a JRE :

java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b06-284)
Java HotSpot(TM) Client VM (build 1.5.0_16-133, mixed mode, sharing)

Running :

$JAVA_HOME/bin/java -version

showed the same thing. So where is this JDK that Apple speaks of? Its there. The only thing that I was missing was :

export JAVA_HOME

Oops.

Calendar and date ranges

2008-11-25T10:23:00.009-05:00

I hate Java's Calendar and Date apis. Hopefully JSR 310 will improve things.

In the meantime, here's a trick for selecting based on a date range :


   Calendar cal = Calendar.getInstance();
   cal.set(Calendar.HOUR, (cal.get(Calendar.HOUR) - 1));
   beforeDate = cal.getTime();
   cal.set(Calendar.DATE, (cal.get(Calendar.DATE) - 1));
   cal.set(Calendar.HOUR_OF_DAY, 00);
   cal.set(Calendar.MINUTE, 00);
   cal.set(Calendar.SECOND, 00);
   afterDate = cal.getTime();

The beforeDate member variable is set to the current date minus one hour. Then the cal Calendar instance is set to 12:00 AM the day before.

Dashboard wouldn't start

2008-11-21T14:48:00.007-05:00

I got a new MacBook Pro at work. I'm completely happy about that!

Dashboard quit working. It might not have ever worked, but I think it did. After installing a new widget it wouldn't start.

I typed : defaults write com.apple.dashboard mcx-disabled -boolean NO

Followed by : killall Dock

Dashboard worked fine after that.

I found the answer here.

Seam-gen and Oracle Express

2008-11-12T09:51:00.005-05:00

I installed Oracle Express. I created a user, "local," with the creative password, "local." I created a project with seam-gen. I created an entity object and annotated the id column with :

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@Column(name = "id", unique = true, nullable = false)
private Long id;

On deploy I saw in the logs :

09:42:14,281 INFO  [SchemaExport] exporting generated schema to database
09:42:14,609 ERROR [SchemaExport] Unsuccessful: create table TABLE_NAME (id number(19,0) not null unique, name varchar2(30) not null, description varchar2(200) not null, inputChannel varchar2(100) not null, outputChannel varchar2(100) not null, parser varchar2(100), primary key (id))
09:42:14,609 ERROR [SchemaExport] ORA-02261: such unique or primary key already exists in the table

The message, "such unique or primary key already exists in the table," led me to believe that the table existed. However, I couldn't see it using the Oracle web interface. Or SQL Developer. Or MyEclipse.

So I ran the statement in the web interface. Same error.

The problem turned out to be that the statement was creating the id twice. First with, "id number(19,0) not null unique," and second with, "primary key (id)."

I changed the syntax, and it worked. As for the annotations, I removed the "Column" annotation :

@Column(name = "id", unique = true, nullable = false)

When I redeployed it worked fine.

The working annotation was :

@Id
@SequenceGenerator(name = "TABLE_NAME_SEQUENCE_GENERATOR", sequenceName = "TABLE_NAME_SEQUENCE")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "TABLE_NAME_SEQUENCE_GENERATOR")
private Long id;

JBossWS Eclipse JUnit Error

2008-10-21T21:03:00.008-04:00

I played with JBossWS for the first time this evening. I'm runningEclipse with JBossTools installed. It was easy enough to compile (Ant task) and import the project into Eclipse.

However, when I ran the tests I got a "Java Virtual Machine Error." The popup read "Could not find the main class. Program will exit." There's an post about this in the JBoss forums but no answer.

The tests run from Ant (even within Eclipse.) While running the tests from the command line a second time I noticed the following message :

tests-prepare: [echo] [echo] ----------------------------------------------- [echo] jboss.home = C:/tools/servers/jboss/jboss-4.2.3.GA [echo] excludesfile = C:\tools\jbossws\jbossws-native-3.0.4.GA\jbossws-native-bin-dist/tests/resources/test-exclude s-jboss423.txt [echo] java.home = C:\tools\java\j2se5.0u16\jre

It's pointing to the jre of my java home for some reason. I check the environment variable by running, echo %JAVA_HOME%, but it is pointing to the base install not just the jre.

Searching through the project for "jre" doesn't return anything. I hate to give up before I find a solution, but I had stuff to get done.

I ran the "ant eclipse" task again and imported into a fresh Eclipse install. No problem running the tests.

I'll try to reproduce and file a Jira issue. I thought I'd post this just in case anyone else is banging their head against the same wall.

Running Eclipse in a full JDK

2008-10-16T10:09:00.001-04:00

After installing the Maven plugin I got a warning that Eclipse should run in a full jdk. The solution is really simple (and on the Eclipse wiki), and I was kind of surprised I hadn't run into this before.

Simply add the following to eclipse.ini (found in the Eclipse install folder) :
-vm
path-to-your-jdk (C:\tools\java\j2se5.0u16\bin\javaw.exe for example)

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gVim

2008-09-25T12:28:00.001-04:00

Want to change your font in gVim? Here's how. I love the title of that page, "Troubleshooters.com and T.C Linux Library Present Permananetly Changing Your Graphical Vim Font"

If you want to change the color scheme, edit your _vimrc file on Windows, which is located in : C:\Program Files\Vim. Simply add "colors [name of the color theme you want to use]." The themes themselves can be found in C:\Program Files\Vim\vim72\colors. I like "darkblue."

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Seam-gen, HSQLDB and development schemas

2008-09-25T10:56:00.001-04:00

I like using HSQLDB's in memory db for early development. Changes the annotations on my entities and letting hbm2ddl create the schema (tables actually which is what this post is about) for me is way useful. One of the best things about Seam IMHO.

I ran into an error in my curent project which I set up using seam-gen and giving it a schema name of "PROJECTDEV." After creating an entity class, "Job" I ran "seam generate-ui" from my project directory. I deployed expecting to see the default crud screens that seam generates. However, when I clicked on the "Job List" link I got an error. The console told me something was wrong with my schema :

Caused by: java.sql.SQLException: invalid schema name in statement

And looking further back in the logs I found error messages from Seam while the schema export was running:

[SchemaExport] invalid schema name: PROJECTDEV in statement

Poking around the web I found some references to this problem on the Hibernate forums, JBoss forums and JBoss Jira.

I tried putting :

CREATE SCHEMA PROJECTDEV AUTHORIZATION DBA;

in my import.sql file, but that didn't work. Same errors.

I had to create the schema manually in the HSQLDB database manager (I have a post on how to use this if you don't already know how.) After that everything worked fine.

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DBUnit and slf4j

2008-09-19T11:31:00.001-04:00

I had never heard of slf4j before this morning, and I have no idea why. I'm usually pretty up on stuff.

I started to pull some test data with dbunit ( in case you aren't familiar with dbunit here's an excellent intro by Bill Siggelkow ), and when I ran it I got the following error :

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.dbunit.database.AbstractDatabaseConnection.<clinit>(AbstractDatabaseConnection.java:46)
at [my package and class].main(DBUnitExporter.java:62)

The solution is to download slf4j, and add slf4j-api-1.5.2.jar and slf4j-log4j12-1.5.2.jar to the classpath (I'm using Eclipse so I threw it in the run dialog.)

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HIbernate join tables or xref tables or cross reference tables or cross-reference tables

2008-07-21T15:34:00.002-04:00

I just spent a bit of time figuring out how to do bidirectional one-to-many mappings that are associated with a join table / xref / cross reference / cross-reference (I'm spelling all of these out in the event that some other poor soul is searching those terms) and exist in separate schemas.

Its actually spelled out (not the separate schema part, but that's easy) on the hibernate site which shouldn't be surprising since its an excellent site.

There are two tricks to making this work :

Map the children into the parent as a many-to-many, but set "unique='true'" in the mapping.
Map the join table into the child object.

In my case this meant something along the lines of this in the parent :
<set name="children" table="XREF" schema="PARENT_SCHEMA"
lazy="false" inverse="true">
<key column="XREF_PARENT_ID" not-null="true" />
<many-to-many unique="true" column="XREF_CHILD_ID" class="com.jeremyrdavis.Child" />
</set>

And this in the child :
<join table="PARENT_SCHEMA.XREF" inverse="true" optional="true" >
<key column="XREF_CHILD_ID" not-null="true" />
<many-to-one name="group" column="XREF_PARENT_ID" not-null="true"></many-to-one>
</join>

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Terracotta at July's AJUG

2008-07-16T22:09:00.003-04:00

Last Tuesday's AJUG (that's the Atlanta Java User's Group) presentation by Kunal Bhasin, a field engineer at Terracotta, ruled. First of all, Kunal did a bang up job of fielding a ton of questions, and most of crowd stayed around an extra half hour for his presentation. Second, Terracotta has a seriously cool app.

I've attend AJUG regularly (meaning most of them) for the past few years. Burr Sutter who runs AJUG and is the product manager for JBoss ESB does a great job with the speakers, but there have been a few that really stand out. I got introduced to both Hibernate and Spring (although I had read about Hibernate previously) a few years back at AJUG meetings, and on both occasions got the feeling that those technologies were not only worth using but would be really big. I got a similar impression about Terracotta; although, its nothing like either Hibernate or Spring. Its actually pretty invisible to developers, which is the point.

In a nutshell (echoes of O'Reilly?) Terracotta's server(s) controls the objects for numerous JVMs allowing applications from each to access the same instances without any special apis. I'm sure there's plenty of information on their site, and if you are an architect or have had to worry about clustering, caching or scaling then check it out. They have separate sites for the commercial and open source versions (a lot like JBoss.com and JBoss.org - is this going to be the standard for oss business models now?)

Bill Sengstacken, who is in marketing, is going to post a video, and there should be a link on the AJUG site at some point.

Excellent post about Seam and Google bots

2008-06-04T09:25:00.001-04:00

I haven't blogged in ages so it is pretty lame to simply link to someone else's post; however, this is an excellent piece of work.

Its about dealing with Google bots that can crash a Seam site.

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'findstr' is not recognized as an internal or external command

2008-04-30T14:40:00.001-04:00

I got this error starting JBoss from a dos prompt today :

'findstr' is not recognized as an internal or external command

I guess I had been using the ide more than usual since re-imaging my laptop. The problem was pretty easily resolved thanks to this post on JBoss wiki.

I added C:\WINDOWS\system32 to my PATH variable and everything booted.

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Printing Arrays in Groovy

2008-04-25T08:51:00.002-04:00

While working through the arrays page of the Getting Started Guide at the Groovy codehaus site, I stumbled upon some interesting behaviour. I was adding "print" statements to the following block of code :

assert a as List == ['a', 2, 'c', false] 
so that I ended up with :

print "\na as List : " + a as List

The result wasn't what I expected :

["\n", "a", " ", "a", "s", " ", "L", "i", "s", "t", " ", ":", " ", "{", "\"", "a", "\"", ",", " ", "2", ",", " ", "\"", "f", "o", "o", "\"", ",", " ", "f", "a", "l", "s", "e", "}"] I added parentheses around the "a as List" and got what I expected : a as List : ["a", 2, "foo", false] Simple lesson : pay attention to precedence! That or drink coffee first thing in the morning.

Also, turning the whole string into a list that easily is cool.

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Netbeans Keyboard Shortcuts

2008-04-18T16:12:00.002-04:00

I've been using Netbeans some recently after a the Sun Tech Days (Atlanta) and an AJUG presentation on Glassfish. Barry Hawkins' announcement at last night's (April) AJUG meeting about upcoming Python support really piqued my interest and made me decide to get comfortable using it.

My biggest annoyance when switching IDEs is not knowing the keyboard shortcuts. I despise the mouse and keep it on the left side of my desk (I'm right handed) - a Neal Ford suggestion. There is a pdf of shortcuts accessible from Netbeans' help menu, but there is a more complete list available on their wiki.

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Google AppEngine

2008-04-08T12:18:00.002-04:00

New Google AppEngine!

Sweet, couldn't wait to use it. I started the tutorial during lunch. I downloaded and installed Python and the AppEngine. Then I created a work directory, "C:\google_workspace" and a helloworld folder, "C:\google_workspace\helloworld" just like the tutorial said to do, created the files "helloworld.py" and "app.yaml" just like in the tutorial, and fired up the dev_appserver with, "C:\google_workspace\helloworld>dev_appserver.py helloworld\". Instead of "Hello, world!" I got :

C:\google_workspace\helloworld>dev_appserver.py helloworld/
Traceback (most recent call last):
File "C:\Program Files\Google\google_appengine\dev_appserver.py", line 50, in
<module>
execfile(script_path, globals())
File "C:\Program Files\Google\google_appengine\google/appengine/tools/dev_apps
erver_main.py", line 338, in <module>
sys.exit(main(sys.argv))
File "C:\Program Files\Google\google_appengine\google/appengine/tools/dev_apps
erver_main.py", line 287, in main
config, matcher = dev_appserver.LoadAppConfig(root_path, {})
File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_apps
erver.py", line 2415, in LoadAppConfig
raise AppConfigNotFoundError
google.appengine.tools.dev_appserver.AppConfigNotFoundError

Hmm. I ran through a mental checklist before diving into the code (I knew I was being lazy. I was also really looking forward to diving into the code, but I wanted to at least get the thing running first.)

Perhaps I should've installed somewhere other than "C:\Program Files" I don't usually put anything in there.
Apparently I had Tomcat running which would be blocking 80 (I usually set Tomcat to 80 and JBoss to 8080).

Neither of those made a difference. "I, d, ten, t" error - I was running the wrong file.

Running, "C:\google_workspace\helloworld>dev_appserver.py ./" started the server.

The first line was a prompt, "Allow dev_appserver to check for updates on startup? (Y/n):"
Naturally I said "Y", and I liked name of the config file which was conveniently printed out on the next line, "dev_appserver will check for updates on startup. To change this setting, edit C
:\Documents and Settings\jdavis/.appcfg_nag"

I saw "Hello, world!"

I can't wait to start using this. Now I can finally build a completely scalable side project to make myself rich without spending any money out of pocket! Actually, I can finally stop putting off learning Python.

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Hibernate reverse engineering and "yes_no" columns

2008-02-28T10:25:00.003-05:00

Since attending JBossWorld Orlando, I've been playing with the JBoss Developer Studio. I've had some problems with reverse generation of my entities, and so I thought I'd post some of the solutions.

My database uses logical deletes ("Y" and "N".) The generated entities, which were typed as Boolean's choked on insert.

I haven't had much luck yet customizing the generation from the JBoss Developer Studio menu , and so I've been using the Hibernate Tools for Eclipse to generate my entities into a separate project, ModelProject, and then copying them into a seam project.

My plan was to use Seam tools to generate the crud ui from the project. However, right clicking the project and choosing "New -> Seam Generate Entities" and then selecting "Use existing entities" didn't do anything.

I started over and did the following :
ran seam-gen from the command line and created a new project, SeamProject
imported the resulting project into Eclipse
copied the reverse-engineered entities from ModelProject into SeamProject
ran "seam generate-ui" from the command line

This worked beautifully. The only hitch was I kept getting a vague error from DB2/400 when I tried to create a new entity, "[SQL0545] INSERT or UPDATE not allowed by CHECK constraint."

I checked all the constraints and after a few failed attempts determined that I wasn't violating any foreign keys. There were only a couple of not null fields one of which was the logical delete column. I had entered the translation I wanted into the hibernate.reveng.xml file (or at least I thought I had), but there was no annotation for "yes_no." I simply added @Type(type="yes_no") to the field, and everything worked.

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JBoss World Orlando - Friday

2008-02-15T16:32:00.003-05:00

EJB3, Seam, JSF, and RichFaces on JBoss 4.2.0 was the first session I attended. It was a case study of easycredit a German loan system. I've found the case studies useful.

The second session I attended was a 90 minute JBoss Developer Studio workshop. I had already installed the JBoss Tools project into Eclipse so I was glancingly familiar with it; however, I've used seam-gen for the projects I've been working on and hadn't made use of the Developer Studio tooling. Reverse engineering a domain model is stupidly simple.

Agile Development Using JBoss Seam was the third session I attended. Daniel Hinojosa was the speaker, and he had some cool tips on using Groovy for unit testing that I want to check out. He also showed off some stuff that I didn't know Hudson could do.

Testing JSF Applications which was an intro to JSFUnit by Stan Silvert was another session that I really liked, meaning I will start using JSFUnit next week. The executive summary is that resulting from his hatred of Mock objects, Stan created a JSF testing framework that works inside the the container without all the overhead of Cactus.

Some Other JBossWorld Bloggers

2008-02-15T13:45:00.003-05:00

Daniel Hinojosa is currently speaking (I'm in his seminar now) and blogging about the show on his evolutionnext blog.

JBoss World Orlando - Thursday

2008-02-14T09:48:00.006-05:00

Introduction into JBoss Drools and the Business Rules Management System (BRMS) by Mark Proctor was the first session I attended.

Drools/JBoss rules is really cool. The web based BRMS system looks very nice, and offloading the maintenance to the business users is a must anyway. I'll be using this soon.

I found the keynote by Vefim Natis from Gartner interesting. Although I am way tired of hearing about SOA I still got a lot out of his talk. Some of his points :

Gartner's hype cycle currently puts SOA entering mainstream acceptance.
SOA is primarily about business modeling : identifying the business components that need to be developed as software.
Establishment of an Integration/SOA Competency Center (ICC) is the barometer of success
Heterogenous software/environments are not only necessary, but should be regarded as a goal.

The Hibernate Search session was impressive. Emmanuel Bernard, the project's team lead was the presenter. I didn't have a lot of experience using Lucene (one project a few years ago), but it looked like they've done a nice job wrapping Lucene and providing an API that should be familiar to Hibernate users.

JBoss World Orlando - Wednesday

2008-02-13T12:44:00.002-05:00

I'm at JBossWorld Orlando. We got the usual t-shirt and bag, but the 1G flash drive was definitely the best schwag I've picked up (I didn't take a single pen during the vendor meet and greet!)

I checked out the jBPM session, "A Lightweight Approach to Business Processes With JBoss jBPM", first. I would've liked more practical use information, but the overview of the jBPM platform, which is how Tom Bayens described it, was interesting.

The next session on "Seam, SEAM, AS, EJB3, Hibernate, AJAX4JSF, RichFaces, and Facelets", was given by four guys from Big Lots. It was an excellent talk. I don't know how much presenting they do, but they traded off easily and kept the talk moving really well. It didn't hurt that their case study was very relevant to the project I'm working on.

Server did not start after 50s

2008-01-31T16:37:00.002-05:00

I got this error while starting up JBoss from Eclipse, 3.3 with the latest JBoss Tools installed (I haven't shelled out the $100 for Red Hat Developer Studio.)

"Timeout waiting for JBOSS 4.2 to start. Server did not start after 50s."

At December's AJUG meeting I saw a demonstration of Glassfish starting in under a minute, which was seriously impressive. However, Eclipse can't be pimping Glassfish, and while I am interested in giving Glassfish a look, I need this running now. Besides, I like JBoss.

I deleted a couple of the ear files that I wasn't working on, but I kept getting the timeout error. A quick Google, and I located the following folders in my EclipseDist\plugins directory :

org.eclipse.jst.server.generic.jboss_1.5.102.v20070608
org.eclipse.jst.server.generic.jboss_1.5105.v200709061325.

I edited the plugin.xml in the org.eclipse.jst.server.generic.jboss_1.5105.v200709061325 folder. The relevant parts were the serverType entries, startTimeout parameters.

<extension point="org.eclipse.wst.server.core.serverTypes">
<serverType
runtime="true"
class="org.eclipse.jst.server.generic.core.internal.GenericServer"
id="org.eclipse.jst.server.generic.jboss323"
initialState="stopped"
supportsRemoteHosts="false"
runtimeTypeId="org.eclipse.jst.server.generic.runtime.jboss323"
description="%jboss323serverTypeDescription"
launchConfigId="org.eclipse.jst.server.generic.core.launchConfigurationType"
behaviourClass="org.eclipse.jst.server.generic.core.internal.GenericServerBehaviour"
name="%jboss323serverTypeName"
startTimeout="50000"
stopTimeout="15000"
hasConfiguration="false"
launchModes="run,debug,profile">
</serverType>
<serverType
runtime="true"
class="org.eclipse.jst.server.generic.core.internal.GenericServer"
id="org.eclipse.jst.server.generic.jboss4"
initialState="stopped"
supportsRemoteHosts="false"
runtimeTypeId="org.eclipse.jst.server.generic.runtime.jboss4"
description="%jboss4serverTypeDescription"
launchConfigId="org.eclipse.jst.server.generic.core.launchConfigurationType"
behaviourClass="org.eclipse.jst.server.generic.core.internal.GenericServerBehaviour"
name="%jboss4serverTypeName"
startTimeout="50000"
stopTimeout="15000"
hasConfiguration="false"
launchModes="run,debug,profile">
</serverType>
<serverType
runtime="true"
class="org.eclipse.jst.server.generic.core.internal.GenericServer"
id="org.eclipse.jst.server.generic.jboss42"
initialState="stopped"
supportsRemoteHosts="false"
runtimeTypeId="org.eclipse.jst.server.generic.runtime.jboss42"
description="%jboss42serverTypeDescription"
launchConfigId="org.eclipse.jst.server.generic.core.launchConfigurationType"
behaviourClass="org.eclipse.jst.server.generic.core.internal.GenericServerBehaviour"
name="%jboss42serverTypeName"
startTimeout="50000"
stopTimeout="15000"
hasConfiguration="false"
launchModes="run,debug,profile">
</serverType>
<serverType
runtime="true"
class="org.eclipse.jst.server.generic.core.internal.GenericServer"
id="org.eclipse.jst.server.generic.jboss5"
initialState="stopped"
supportsRemoteHosts="false"
runtimeTypeId="org.eclipse.jst.server.generic.runtime.jboss5"
description="%jboss5serverTypeDescription"
launchConfigId="org.eclipse.jst.server.generic.core.launchConfigurationType"
behaviourClass="org.eclipse.jst.server.generic.core.internal.GenericServerBehaviour"
name="%jboss5serverTypeName"
startTimeout="50000"
stopTimeout="15000"
hasConfiguration="false"
launchModes="run,debug,profile">
</serverType>
</extension>

I changed the values to 180000 ms and JBoss booted just fine.

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Seam Tip Number 4

2007-11-19T13:39:00.001-05:00

Seam Tip Number 4 : @In(required = false) pitfall

In retrospect this is really obvious, but a member variable annotated with @In will be overwritten in subsequent invocations of a Stateful Session Bean even with a "required = false" on the annotation.

I had assumed that the "required = false" would prevent the variable from being injected if it wasn't present, but that isn't the case.

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NumberFox

2007-11-07T10:25:00.002-05:00

This is a completely cool Firefox plugin that Neal Ford mentioned in his Productivity talk at No Fluff Just Stuff (I was at the Atlanta one.)

Clicking ctrl + z or ctrl + w will display small, numbered boxes next to the clickable elements in a page. You can then click the link by clicking the number and enter from the keyboard.

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Seam Tip Number 3

2007-10-30T15:17:00.001-04:00

Seam Tip Number 3

This isn't so much a tip, but a "gotcha" to avoid.

Make sure that you have an <h:messages /> tag in your page and that it does not have "globalOnly" set to "true."

I spent a lot of time wondering my my method wasn't getting called when the problem was a not null value being trapped.

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Seam Tip Number 2

2007-10-24T09:43:00.001-04:00

Seam Tip Number 2

Keep insert statements inside the import.sql file on the same line.

One of the coolest things about developing in Seam is the "create-drop" setting for data.

If you create your project with seam-gen and choose "y" for the prompt, "Do you want to drop and recreate the database tables and data in import.sql each time you deploy?" there will be three files, import-dev.sql, import-test.sql and import-prod.sql. The data in these files will be used to populate tables generated from your entities. You can of course do this manually, but I want to be brief.

I mocked up some data and redeployed, but I wasn't seeing anything when I hit the page. Watching the log files after restarting the server showed an sql error on import which turned out to be the line break. I was using Eclipse to edit the file so I found that odd, but stranger things have of course happened. I removed the line breaks and everything worked.

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Seam Tip Number 1

2007-10-23T08:07:00.001-04:00

Seam Tip Number 1

Seam-gen saves your defaults in the build.properties (Ant of course) file inside the [Seam dist]/seam-gen folder.

If like me you have accidentally typed the wrong directory for your project workspace or the wrong directory for your db driver jar file, simply edit the build.properties and the defaults will change.

Seam-gen is a cool part of JBoss Seam. From the Seam docs,
"This is the easy way to get your feet wet with Seam, and gives you some ammunition for next time you find yourself trapped in an elevator with one of those tedious Ruby guys ranting about how great and wonderful his new toy is for building totally trivial applications that put things in databases."

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