Difference between revisions of "EclipseLink/Examples/JPA/Migration/JBoss"

From Eclipsepedia

Jump to: navigation, search
m (Migrating to JBoss using EclipseLink as JPA provider)
m (Migrating to JBoss using EclipseLink as JPA provider)
Line 1: Line 1:
=Migrating to JBoss using EclipseLink as JPA provider=
 
*These instructions are for users wishing to migrate EclipseLink to the [http://www.jboss.org/jbossas/downloads JBoss] container as well as possibly migrating from another persistence provider such as Hibernate.
 
*The EJB3 example on jboss.org will be used as a common open-source example of how to migrate a small <font color="green">'''container managed'''</font> web application from using Hibernate to using EclipeLink as the JPA provider.
 
**See the RedHat [http://www.redhat.com/docs/manuals/jboss/jboss-eap-4.3/doc/Getting_Started/html-single/index.html#EJB3_Caveats JBoss EJB3 Example] documentation.
 
**See the JBoss EJB3 example [http://www.redhat.com/docs/manuals/jboss/jboss-eap-4.3/gettingstarted.zip jsfejb3.ear] binary.
 
  
==persistence.xml Modifications==
 
===Original persistence.xml===
 
<source lang="xml">
 
<persistence>
 
  <persistence-unit name="helloworld">
 
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
 
      <jta-data-source>java:/DefaultDS</jta-data-source>
 
      <properties>
 
        <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
 
        <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
 
      </properties>
 
  </persistence-unit>
 
</persistence>
 
</source>
 
 
===Modified persistence.xml===
 
<source lang="xml">
 
<xml version="1.0" encoding="UTF-8"?>
 
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence"
 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 
  xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
 
  <persistence-unit name="helloworld">
 
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
 
    <jta-data-source>java:/DefaultDS</jta-data-source>
 
    <!-- Entities must be specified for EclipseLink weaving -->
 
    <class>Todo</class>
 
    <properties>
 
      <property name="eclipselink.target-database" value="HSQL"/>
 
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
 
      <property name="eclipselink.ddl-generation.output-mode" value="database"/>
 
      <property name="eclipselink.target-server" value="JBoss"/>
 
      <property name="eclipselink.logging.level" value="FINEST"/>
 
    </properties>
 
  </persistence-unit>
 
</persistence>
 
</source>
 
*The following changes must be done to persistence.xml
 
 
===Set target-server===
 
The fix for [http://jira.jboss.org/jira/browse/EJBTHREE-572 EJBTHREE-572] requires that the PersistenceUnit state the JBoss platform using the ''target-server'' property. We recommend the short name ''JBoss'' (but the full package name ''org.eclipse.persistence.platform.server.jboss.JBossPlatform'' is supported).
 
* See org.eclipse.persistence.config.TargetServer for a list of container platforms supported.
 
 
<source lang="xml">
 
<property name="eclipselink.target-server" value="JBoss"/>
 
</source>
 
 
===Set target-database===
 
To continue to use the HSQL (Hypersonic) Database all you need to do is define the target-database in the persistence unit, we recommend the short name ''HSQL'' (but the full package name ''org.eclipse.persistence.platform.database.HSQLPlatform'' is supported).
 
* See org.eclipse.persistence.config.TargetDatabase for a list of databases supported.
 
 
<source lang="xml">
 
<property name="eclipselink.target-database" value="HSQL"/>
 
</source>
 
 
===Drop/Create Database===
 
The tables will be automatically dropped and created by EclipseLink with the following 2 properties in the persistence unit.  For production environments you would normally already have the schema setup on the database, so using the following schema generation properties will erase any previous existing tables and are normally used for example/demo purposes.
 
<source lang="xml">
 
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
 
<property name="eclipselink.ddl-generation.output-mode" value="database"/>
 
</source>
 
 
==JTA Datasource Configuration==
 
No changes are required in the deploy directory of JBoss 4.2.2 out of the box to run HSQL.
 
 
==@EJB Injection/JNDI lookup Modifications==
 
*The @EJB injection annotation does not currently work outside of the JBoss EJB container - for example in the servlet container.  The solution is to use a custom JNDI lookup which is not in standard JNDI naming format such as "java:comp/env/ejb/jsfejb3/TodoDao" - this code is already on the session DAO bean.
 
<source lang="java">
 
InitialContext ctx = new InitialContext();
 
return (TodoDaoInt) ctx.lookup("jsfejb3/TodoDao/local");
 
</source>
 
 
==Static Weaving / EAR Packaging Modifications==
 
*<font color="red">This example does not require weaving - this section is for reference and can be skipped.</font>
 
*Dynamic weaving (byte-code instrumentation) is not currently available in JBoss 4.2.2 because of [http://jira.jboss.org/jira/browse/EJBTHREE-572 JIRA EJBTHREE-572].  Our workaround is to statically weave the entities by running the following Ant task before creating your EJB jar during EAR packaging.  You must use the statically weaved classes if you would like to use LAZY 1-1 and many-1 functionality.
 
*See [http://bugs.eclipse.org/229634 229634: JBoss predeploy workaround]
 
*Note: that the ant task references persistence.jar, eclipselink.jar and the persistence 1.0 XSD - you may reference these where they exist on your system.
 
*Note: persistence.xml must have both the <xml> element declaration and the namespace validation references in the <persistence> element.
 
 
*Ant static weaving ant task
 
<source lang="xml">
 
<target name="run-weaver">
 
  <taskdef name="weave" classname="org.eclipse.persistence.tools.weaving.jpa.StaticWeaveAntTask">
 
    <classpath>
 
      <pathelement path="${libs}/persistence.jar"/>
 
      <pathelement path="${libs}/eclipselink.jar"/>
 
      <pathelement path="${libs}/persistence_1_0.xsd"/>
 
    </classpath>
 
  </taskdef>
 
 
  <!-- process the weaving function, persistenceInfo references persistence.xml -->
 
  <weave source="build/classes_unweaved"
 
    target="build/classes"
 
    persistenceinfo="build/jars/app_unweaved.jar"
 
    loglevel="FINEST">
 
  </weave>
 
</target>
 
</source>
 
 
==Results==
 
===Building===
 
*You should see the following on your Ant log.
 
<pre>
 
C:\wse\w34b\jbossHWEAR>ant -lib c:\wse\w34b\jbossHWEAR -f build.xml
 
Buildfile: build.xml
 
clean:
 
  [delete] Deleting directory C:\wse\w34b\jbossHWEAR\build
 
compile:
 
    [mkdir] Created dir: C:\wse\w34b\jbossHWEAR\build\classes
 
    [mkdir] Created dir: C:\wse\w34b\jbossHWEAR\build\classes_unweaved
 
    [javac] Compiling 5 source files to C:\wse\w34b\jbossHWEAR\build\classes_unweaved
 
    [javac] Note: C:\wse\w34b\jbossHWEJB\ejbModule\TodoDao.java uses unchecked or unsafe operations.
 
    [javac] Note: Recompile with -Xlint:unchecked for details.
 
ejb3jar0:
 
    [mkdir] Created dir: C:\wse\w34b\jbossHWEAR\build\jars
 
      [jar] Building jar: C:\wse\w34b\jbossHWEAR\build\jars\app_unweaved.jar
 
run-weaver:
 
    [weave] [EL Finer] : 2008.05.05 16:30:41.216--ServerSession(29857804)--Thread(Thread[main,5,main])--Searching for default mapping file in file:/C:/wse/w34b/jbossHWEAR/build/jars/app_unweaved.jar
 
    [weave] [EL Finer] : 2008.05.05 16:30:41.246--ServerSession(29857804)--Thread(Thread[main,5,main])--Found a default mapping file at jar:file:/C:/wse/w34b/jbossHWEAR/build/jars/app_unweaved.jar!/META-INF/orm.xml for root URL file:/C:/wse/w34b/jbossHWEAR/build/jars/app_unweaved.jar
 
    [weave] [EL Config]: 2008.05.05 16:30:41.878--ServerSession(29857804)--Thread(Thread[main,5,main])--The table name for entity [Todo] is being defaulted to: TODO.
 
    [weave] [EL Config]: 2008.05.05 16:30:41.891--ServerSession(29857804)--Thread(Thread[main,5,main])--The discriminator column name for the root inheritance class [class Todo] is being defaulted to: DTYPE.
 
    [weave] [EL Config]: 2008.05.05 16:30:41.928--ServerSession(29857804)--Thread(Thread[main,5,main])--The column name for element [public java.lang.String Todo.getDescription()] is being defaulted to: DESCRIPTION.
 
    [weave] [EL Config]: 2008.05.05 16:30:41.937--ServerSession(29857804)--Thread(Thread[main,5,main])--The column name for element [public java.lang.String Todo.getTitle()] is being defaulted to: TITLE.
 
    [weave] [EL Finer] : 2008.05.05 16:30:41.950--ServerSession(29857804)--Thread(Thread[main,5,main])--Class [Todo] registered to be processed by weaver.
 
    [weave] [EL Finest]: 2008.05.05 16:30:41.974--ServerSession(29857804)--Thread(Thread[main,5,main])--Begin weaver class transformer processing class [Todo].
 
    [weave] [EL Finest]: 2008.05.05 16:30:42.020--ServerSession(29857804)--Thread(Thread[main,5,main])--Weaved persistence (PersistenceEntity) [Todo].
 
    [weave] [EL Finest]: 2008.05.05 16:30:42.029--ServerSession(29857804)--Thread(Thread[main,5,main])--Weaved change tracking (ChangeTracker) [Todo].
 
    [weave] [EL Finest]: 2008.05.05 16:30:42.040--ServerSession(29857804)--Thread(Thread[main,5,main])--Weaved fetch groups (FetchGroupTracker) [Todo].
 
    [weave] [EL Finest]: 2008.05.05 16:30:42.053--ServerSession(29857804)--Thread(Thread[main,5,main])--End weaver class transformer processing class [Todo].
 
war:
 
      [war] Building war: C:\wse\w34b\jbossHWEAR\build\jars\app.war
 
ejb3jar:
 
      [jar] Building jar: C:\wse\w34b\jbossHWEAR\build\jars\app.jar
 
ear:
 
      [ear] Building ear: C:\wse\w34b\jbossHWEAR\build\jars\jsfejb3.ear
 
deploy:
 
    [copy] Copying 1 file to C:\opt\jboss422\server\default\deploy
 
main:
 
BUILD SUCCESSFUL
 
Total time: 3 seconds
 
</pre>
 
 
*A diff of the unweaved and weaved bytecode will look like the following.
 
 
[[Image:Eclipselink_jboss_weaving_bytecode_diff.jpg]]
 
 
===Deployment===
 
*Make sure the JBoss server is running when the ear is copied to the deploy directory or start the server.
 
<pre>
 
 
10:13:11,063 INFO  [JmxKernelAbstraction] jboss.jca:name=DefaultDS,service=DataSourceBinding
 
10:13:11,064 INFO  [PersistenceUnitDeployment] Starting persistence unit persistence.units:ear=jsfejb3.ear,jar=app.jar,unitName=helloworld
 
10:13:11,230 INFO  [STDOUT] [EL Warning]: 2008.05.08 10:13:11.205--Thread(Thread[main,5,jboss])--The temporary classLoader for PersistenceLoadProcessor [helloworld] is not available.  Switching classLoader to [org.jboss.mx.loading.UnifiedClassLoader3@182d86{ url=file:/C:/opt/jboss422/server/default/tmp/deploy/tmp20649jsfejb3.ear ,addedOrder=45}].  Weaving has been disabled for this session. EclipseLink may be unable to get a spec mandated temporary class loader from the server, you may be able to use static weaving as an optional workaround.
 
10:13:11,238 INFO  [STDOUT] [EL Finest]:  2008.05.08 10:13:11.231--ServerSession(2522904)--Thread(Thread[main,5,jboss])--Begin predeploying Persistence Unit helloworld; state Initial; factoryCount 0
 
10:13:11,241 INFO  [STDOUT] [EL Finest]:  2008.05.08 10:13:11.241--ServerSession(2522904)--Thread(Thread[main,5,jboss])--property=eclipselink.weaving; value=true
 
10:13:11,241 INFO  [STDOUT] [EL Finest]:  2008.05.08 10:13:11.241--ServerSession(2522904)--Thread(Thread[main,5,jboss])--property=eclipselink.orm.throw.exceptions; default value=true
 
10:13:11,259 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:11.256--ServerSession(2522904)--Thread(Thread[main,5,jboss])--Searching for default mapping file in file:/C:/opt/jboss422/server/default/tmp/deploy/tmp20649jsfejb3.ear-contents/app.jar
 
10:13:11,264 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:11.263--ServerSession(2522904)--Thread(Thread[main,5,jboss])--Found a default mapping file at jar:file:/C:/opt/jboss422/server/default/tmp/deploy/tmp20649jsfejb3.ear-contents/app.jar!/META-INF/orm.xml for root URL file:/C:/opt/jboss422/server/default/tmp/deploy/tmp20649jsfejb3.ear-contents/app.jar
 
10:13:12,007 INFO  [STDOUT] [EL Config]:  2008.05.08 10:13:12.006--ServerSession(2522904)--Thread(Thread[main,5,jboss])--The table name for entity [Todo] is being defaulted to: TODO.
 
10:13:12,011 INFO  [STDOUT] [EL Config]:  2008.05.08 10:13:12.011--ServerSession(2522904)--Thread(Thread[main,5,jboss])--The discriminator column name for the root inheritance class [class Todo] is being defaulted to: DTYPE.
 
10:13:12,042 INFO  [STDOUT] [EL Config]:  2008.05.08 10:13:12.042--ServerSession(2522904)--Thread(Thread[main,5,jboss])--The column name for element [public java.lang.String Todo.getDescription()] is being defaulted to: DESCRIPTION.
 
10:13:12,046 INFO  [STDOUT] [EL Config]:  2008.05.08 10:13:12.046--ServerSession(2522904)--Thread(Thread[main,5,jboss])--The column name for element [public java.lang.String Todo.getTitle()] is being defaulted to: TITLE.
 
10:13:12,048 INFO  [STDOUT] [EL Finest]:  2008.05.08 10:13:12.048--ServerSession(2522904)--Thread(Thread[main,5,jboss])--End predeploying Persistence Unit helloworld; state Predeployed; factoryCount 1
 
10:13:12,088 INFO  [JmxKernelAbstraction] creating wrapper delegate for: org.jboss.ejb3.stateless.StatelessContainer
 
10:13:12,092 INFO  [JmxKernelAbstraction] installing MBean: jboss.j2ee:ear=jsfejb3.ear,jar=app.jar,name=TodoDao,service=EJB3 with dependencies:
 
10:13:12,092 INFO  [JmxKernelAbstraction] persistence.units:ear=jsfejb3.ear,jar=app.jar,unitName=helloworld
 
10:13:12,231 INFO  [EJBContainer] STARTED EJB: TodoDao ejbName: TodoDao
 
10:13:12,253 INFO  [EJB3Deployer] Deployed: file:/C:/opt/jboss422/server/default/tmp/deploy/tmp20649jsfejb3.ear-contents/app.jar
 
10:13:12,257 INFO  [TomcatDeployer] deploy, ctxPath=/jsfejb3, warUrl=.../tmp/deploy/tmp20649jsfejb3.ear-contents/app-exp.war/
 
10:13:12,704 INFO  [EARDeployer] Started J2EE application: file:/C:/opt/jboss422/server/default/deploy/jsfejb3.ear
 
</pre>
 
 
===Runtime Add new TODO and display ===
 
*http://127.0.0.1:8080/jsfejb3
 
**Action create, read
 
<pre>
 
10:13:22,482 INFO  [STDOUT] >>>>new Todo: Todo@1397218
 
10:13:22,525 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.525--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--property=eclipselink.target-server; value=org.eclipse.persistence.platform.server.jboss.JBossPlatform
 
10:13:22,526 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.526--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--property=eclipselink.target-database; value=org.eclipse.persistence.platform.database.HSQLPlatform
 
10:13:22,556 INFO  [STDOUT] [EL Config]: 2008.05.08 10:13:22.556--ServerSession(2522904)--Connection(28982303)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--Connected: jdbc:hsqldb:C:\opt\jboss422\server\default\data\hypersonic\localDB
 
User: SA
 
Database: HSQL Database Engine  Version: 1.8.0
 
Driver: HSQL Database Engine Driver  Version: 1.8.0
 
10:13:22,596 INFO  [STDOUT] [EL Info]:  2008.05.08 10:13:22.596--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--file:/C:/opt/jboss422/server/default/tmp/deploy/tmp20649jsfejb3.ear-contents/app.jar-helloworld login successful
 
10:13:22,621 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.621--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--Execute query DataModifyQuery()
 
10:13:22,621 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.621--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--reconnecting to external connection pool
 
10:13:22,622 INFO  [STDOUT] [EL Fine]:  2008.05.08 10:13:22.622--ServerSession(2522904)--Connection(9673691)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--DROP TABLE TODO
 
10:13:22,627 INFO  [STDOUT] [EL Warning]: 2008.05.08 10:13:22.624--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--Exception [EclipseLink-4002] (Eclipse Persistence Services - 1.0 (Build SNAPSHOT - 20080502)): org.eclipse.persistence.exceptions.DatabaseException
 
Internal Exception: java.sql.SQLException: Table not found: TODO in statement [DROP TABLE TODO]
 
Error Code: -22 Call: DROP TABLE TODO Query: DataModifyQuery()
 
10:13:22,627 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.627--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--Execute query DataModifyQuery()
 
10:13:22,628 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.628--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--reconnecting to external connection pool
 
10:13:22,628 INFO  [STDOUT] [EL Fine]:  2008.05.08 10:13:22.628--ServerSession(2522904)--Connection(24215639)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--CREATE TABLE TODO (ID NUMERIC(19) NOT NULL, DTYPE VARCHAR(31), DESCRIPTION VARCHAR(255), TITLE VARCHAR(255), PRIMARY KEY (ID))
 
10:13:22,629 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.628--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--End deploying Persistence Unit helloworld; state Deployed; factoryCount 1
 
10:13:22,639 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:22.639--ServerSession(2522904)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--client acquired
 
10:13:22,641 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:22.641--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--TX binding to tx mgr, status=STATUS_ACTIVE
 
10:13:22,641 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.641--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--Execute query DoesExistQuery()
 
10:13:22,647 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.647--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--PERSIST operation called on: Todo@1397218.
 
10:13:22,648 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:22.648--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--TX beforeCompletion callback, status=STATUS_ACTIVE
 
10:13:22,648 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:22.648--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--begin unit of work commit
 
10:13:22,652 INFO  [STDOUT] [EL Finer]:  2008.05.08 10:13:22.652--ClientSession(25769070)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--TX beginTransaction, status=STATUS_ACTIVE
 
10:13:22,653 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.652--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--Execute query InsertObjectQuery(Todo@1397218)
 
10:13:22,655 INFO  [STDOUT] [EL Finest]: 2008.05.08 10:13:22.655--ClientSession(25769070)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--reconnecting to external connection pool
 
10:13:22,655 INFO  [STDOUT] [EL Fine]:  2008.05.08 10:13:22.655--ClientSession(25769070)--Connection(21848338)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--INSERT INTO TODO (ID, DESCRIPTION, TITLE, DTYPE) VALUES (?, ?, ?, ?)
 
bind => [0, TEST, TEST, Todo]
 
10:13:22,665 INFO  [STDOUT] [EL Finer]: 2008.05.08 10:13:22.664--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--TX afterCompletion callback, status=COMMITTED
 
10:13:22,666 INFO  [STDOUT] [EL Finer]: 2008.05.08 10:13:22.666--UnitOfWork(9517133)--Thread(Thread[http-127.0.0.1-8080-2,5,jboss])--end unit of work commit
 
</pre>
 
*Browser Output
 
[[Image:Jpa_jboss_jsfejb3_screencap.jpg]]
 
 
==References==
 
*See [http://wiki.eclipse.org/EclipseLink/Examples/JPA/JBoss_Web_Tutorial Another example of how to use EclipseLink as JPA provider on the JBoss container.]
 
*See [[EclipseLink/UserGuide/Developing_JPA_Projects_%28ELUG%29|Developing JPA Projects]] in the EclipseLink User's Guide.
 

Revision as of 13:48, 14 July 2008