Hibernate Tutorial - Fix 5 of 6 - Using Proper Version of javassist JAR Files

Preface:
I tried to follow the Hibernate Tutorial posted on official Hibernate site. Here is the link to the tutorial. I was using Apache Maven version 2.2.1 and I had to make a lot of modifications to the tutorial code (specially in pom.xml) to make it work. I want to post these fixes/code updates and maybe it might help someone who is having problems walking through the tutorial.

There were so many issues and the post was getting big so I am splitting it into different posts. you can skip reading the 'preface' section of the other posts in this series.

Problem 5 of 6:
Using Proper Version of javassist jar files


Still trying to add an Event, by executing the EventManager, using the maven command:

mvn exec:java -Dexec.mainClass="org.hibernate.tutorial.EventFactory" -Dexec.args="store"

And the errors continued. The new error I was getting:

+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'exec'.
[INFO] ------------------------------------------------------------------------
[INFO] Building First hibernate tutorials
[INFO]    task-segment: [exec:java]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing exec:java
[INFO] No goals needed for project - skipping
[WARNING] While downloading javassist:javassist:3.0
  This artifact has been relocated to jboss:javassist:3.0.


[INFO] [exec:java {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. null

javassist.util.proxy.MethodFilter
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured while executing the Java class. null
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
 at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
 at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
 at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
 at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
 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 org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
 at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
 at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
 at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. null
 at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:338)
 at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
 ... 17 more
Caused by: java.lang.reflect.InvocationTargetException
 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 org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
 at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ExceptionInInitializerError
 at org.hibernate.tutorial.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:31)
 at org.hibernate.tutorial.util.HibernateUtil.(HibernateUtil.java:12)
 at org.hibernate.tutorial.EventManager.createAndStoreEvent(EventManager.java:37)
 at org.hibernate.tutorial.EventManager.main(EventManager.java:25)
 ... 6 more
Caused by: java.lang.NoClassDefFoundError: javassist/util/proxy/MethodFilter
 at org.hibernate.bytecode.javassist.BytecodeProviderImpl.getProxyFactoryFactory(BytecodeProviderImpl.java:49)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactoryInternal(PojoEntityTuplizer.java:203)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:181)
 at org.hibernate.tuple.entity.AbstractEntityTuplizer.(AbstractEntityTuplizer.java:158)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.(PojoEntityTuplizer.java:76)
 at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.(EntityEntityModeToTuplizerMapping.java:80)
 at org.hibernate.tuple.entity.EntityMetamodel.(EntityMetamodel.java:325)
 at org.hibernate.persister.entity.AbstractEntityPersister.(AbstractEntityPersister.java:457)
 at org.hibernate.persister.entity.SingleTableEntityPersister.(SingleTableEntityPersister.java:131)
 at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
 at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:261)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1327)
 at org.hibernate.tutorial.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:21)
 ... 9 more
Caused by: java.lang.ClassNotFoundException: javassist.util.proxy.MethodFilter
 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 java.lang.ClassLoader.loadClass(ClassLoader.java:248
 ... 22 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1 second
[INFO] Finished at: Tue May 11 18:15:28 PDT 2010
[INFO] Final Memory: 6M/16M
[INFO] ------------------------------------------------------------------------

Again, it is clear from the logs that the necessary class is not found and i fixed this by simply changing the javassist dependency in the pom.xml.

 javassist
 javassist
 3.4.GA

Thats out of the way, I was able to successfully execute the EventManager. Here is the success log:

+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'exec'.
[INFO] ------------------------------------------------------------------------
[INFO] Building First hibernate tutorials
[INFO]    task-segment: [exec:java]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing exec:java
[INFO] No goals needed for project - skipping
[INFO] [exec:java {execution: default-cli}]
Hibernate: insert into EVENTS (EVENT_ID, EVENT_DATE, title) values (null, ?, ?)
Hibernate: call identity()
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Tue May 11 18:18:42 PDT 2010
[INFO] Final Memory: 6M/16M
[INFO] ------------------------------------------------------------------------