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EclipseLink/Examples/JPA/OC4J Web Tutorial

< EclipseLink‎ | Examples‎ | JPA
Revision as of 16:06, 9 April 2008 by Michael.obrien.oracle.com (Talk | contribs) (Create server in Eclipse)

EclipseLink JPA Deployed on OC4J using Eclipse WTP

Note: This page started on 20080409 is in edit progress for 72 hours until 20080412

This basic example details how to use Eclipse to run/debug a minimum J2EE web application servlet using EclipseLink JPA as the persistence provider. The goal of this example is to detail the minimum steps needed to run EclipseLink inside OC4J using the Eclipse IDE - no presentation/controller layer such as JSF or Spring will be used beyond a basic Servlet so we can concentration on the the integration layer JPA setup.

Development Environment

Hardware: Windows Vista SP1, HP Core2Quad, 2.4Ghz, 3Gb Ram

Software: Eclipse 3.4 M5 Ganymede (Feb 2008) with all 5 WTP packages (DTP 1.6, EMF 2.4, GEF 3.4, WTP 3.0, XSD 2.4), Oracle 11g DB 11.1.0.6.0, Java JDK 1.5.0_11, OC4J 11.1.1.0.0 Preview 3

This example will run fine with Eclipse 3.3 and any DB that EclipseLink supports.

Prerequisites

  • Install Eclipse
    • I installed a clean version of Eclipse Ganymede M5 with all of WTP 3.0
  • Install a Database
    • In this example I am using Oracle 11g, the table schemas have already been created manually and all entitity java classes have been generated using the Eclipse DALI tool.
  • Install OC4J11
    • See the following Technology Preview 3
    • Here I installed OC4J Standalone version to the following directory.
C:\opt\oc4j11samba
Where 
OC4J_HOME=C:/opt/oc4j11samba/j2ee/home

OC4J Configuration Changes

  • Edit oc4j11 config $OC4J_HOME/config/data-sources.xml and enter the following DataSource definition for JTA and non-JTA sources.
  <managed-data-source name="OracleDS" connection-pool-name="local oracle11g" jndi-name="jdbc/OracleDS"/>
  <connection-pool name="local oracle11g">
    <connection-factory factory-class="oracle.jdbc.pool.OracleDataSource"
      user="user"
      password="password"
      url="jdbc:oracle:thin:@//127.0.0.1:1521/orcl">
    </connection-factory>
  </connection-pool>

EclipseLink JAR location

The eclipselink.jar should be placed as noted by config/server.xml in the directory $OC4J_HOME/applib

  <!-- Global application libraries -->
  <shared-library name="global.libraries" version="1.0" library-compatible="true">
    <code-source path="../applib"/>
  </shared-library>

Create server in Eclipse

Open the servers view New | Server | Oracle | Oracle OC4J Standalone Server 10.1.3.1 (it is ok to use this one for 11.1.1). The only default I had to change was my admin user from oc4jadmin to fmwadmin.

Create J2EE application

Check out the 3 example projects or create your own J2EE Enterprise Application. File | new | project | J2EE | Enterprise Application Project Select server, use 5.0 Ear version Create a new Web and an optional EJB project Select generate deployment descriptor if you want to change the context-root

  • Path changes
	<classpathentry combineaccessrules="false" kind="src" path="/eclipselink.core"/>
	<classpathentry combineaccessrules="false" kind="src" path="/eclipselink.jpa"/>

After EAR project creation - reference eclipselink.core and eclipselink.jpa or include a reference to eclipselink.jar in your WAR project.

  • Persistence.xml
    • Put persistence.xml in yourProjectWeb\src\META-INF
<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="statJPATopLinkJ2EE" transaction-type="RESOURCE_LOCAL">
       <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <non-jta-data-source>jdbc/OracleDS</non-jta-data-source>
        <class>org.eclipse.persistence.example.navigation.business.StatClass</class>
… other entity classes
        <properties>
            <property name="eclipselink.jdbc.driver" value="oracle.jdbc.driver.OracleDriver"/>
            <property name="eclipselink.target-database" value="org.eclipse.persistence.platform.database.oracle.OraclePlatform"/>            
            <property name="eclipselink.logging.level" value="FINEST"/>
        </properties>       
    </persistence-unit>
</persistence>

Start Server

  • Steps: Select the Ear (or the War) and Run on Server.
  • The first run may not start the server, here you start the server and then Run on Server.

Publish EAR

  • In the predeploy of the War you should see weaving messages for your entities if logs are set to FINEST in persistence.xml
  • Depending on your application you will see the following after running [start server]
    • In your console window you will see two processes - one for the server and the second for the deploy target.
Oracle OC4J SA Server 11.1.1.0.0 localhost [Generic Server]	
	C:\jdk1.5.0\bin\javaw.exe (Apr 9, 2008 9:06:19 AM)	
<terminated>jpaELTestEAR module publisher [Ant Build]	
	<terminated, exit value: 0>C:\jdk1.5.0\bin\javaw.exe (Apr 9, 2008 9:06:36 AM)	
  • If you click on the deploy target you will see the deploy logs...
Buildfile: C:\eclipse34\plugins\org.eclipse.jst.server.generic.oc4j_1.5.105.v20071217\buildfiles\oracle.10.1.3.xml
check.skip.ear.deploy:
deploy.j2ee.ear:
package.module.ear:
      [jar] Building jar: C:\opt\oc4j11samba\j2ee\home\applications\jpaELTestEAR.ear
[oracle:deploy] Deploying application jpaELTestEAR.
...
[oracle:deploy] Application deployer for jpaELTestEAR COMPLETES.
  • If you click on the server console you will see the predeploy weaving logs
08/04/09 09:06:29 Oracle Containers for J2EE 11g (11.1.1.0.0)  initialized.
08/04/09 09:06:39 Application Deployer for jpaELTestEAR STARTS.
...
08/04/09 09:06:39 Started application : jpaELTestEAR
08/04/09 09:06:39 Binding jpaELTestWeb web-module for application jpaELTestEAR to site default-web-site under context root jpaELTest
[EPS Finest]: 2008.04.09 09:06:39.893--ServerSession(23543153)--Thread(Thread[DeployerRunnable Thread for jpaELTestEAR,9,SystemThreadGroup])--Begin predeploying Persistence Unit statJPATopLinkJ2EE; state Initial; factoryCount 0
...
[EPS Finer]: 2008.04.09 09:06:39.940--ServerSession(23543153)--Thread(Thread[DeployerRunnable Thread for jpaELTestEAR,9,SystemThreadGroup])--Found a default mapping file at file:/C:/opt/oc4j11samba/j2ee/home/applications/jpaELTestEAR/jpaELTestWeb/WEB-INF/classes/META-INF/orm.xml for root URL file:/C:/opt/oc4j11samba/j2ee/home/applications/jpaELTestEAR/jpaELTestWeb/WEB-INF/classes/
...
[EPS Finer]: 2008.04.09 09:06:40.783--ServerSession(23543153)--Thread(Thread[DeployerRunnable Thread for jpaELTestEAR,9,SystemThreadGroup])--Class [org.eclipse.persistence.example.navigation.business.StatClass] registered to be processed by weaver.
...
[EPS Finest]: 2008.04.09 09:06:40.783--ServerSession(23543153)--Thread(Thread[DeployerRunnable Thread for jpaELTestEAR,9,SystemThreadGroup])--End predeploying Persistence Unit statJPATopLinkJ2EE; state Predeployed; factoryCount 1
[EPS Finest]: 2008.04.09 09:06:41.033--ServerSession(23543153)--Thread(Thread[DeployerRunnable Thread for jpaELTestEAR,9,SystemThreadGroup])--Begin weaver class transformer processing class [org/eclipse/persistence/example/navigation/business/StatClass].
[EPS Finest]: 2008.04.09 09:06:41.079--ServerSession(23543153)--Thread(Thread[DeployerRunnable Thread for jpaELTestEAR,9,SystemThreadGroup])--End weaver class transformer processing class [org/eclipse/persistence/example/navigation/business/StatClass].
...
08/04/09 09:06:41 Binding web application(s) to site default-web-site ends...
08/04/09 09:06:41 Application Deployer for jpaELTestEAR COMPLETES. Operation time: 2155 msecs

Perform a JPQL query

   		emf = Persistence.createEntityManagerFactory(puName);
    		entityManager = emf.createEntityManager();
  • Console Output
08/04/09 09:19:29 Action: init
[EPS Finest]: 2008.04.09 09:19:29.634--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--Begin deploying Persistence Unit statJPATopLinkJ2EE; state Predeployed; factoryCount 2
[EPS Warning]: 2008.04.09 09:19:29.868--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--PersistenceUnitInfo statJPATopLinkJ2EE has transactionType RESOURCE_LOCAL and therefore jtaDataSource will be ignored
[EPS Info]: 2008.04.09 09:19:29.884--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--EclipseLink, version: Eclipse Persistence Services - 1.0 (Build SNAPSHOT - 20080403)
[EPS Config]: 2008.04.09 09:19:30.289--ServerSession(2059288)--Connection(17254324)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--connecting(DatabaseLogin(
	platform=>OraclePlatform
	user name=> "stat"
	connector=>JNDIConnector datasource name=>null
))
[EPS Config]: 2008.04.09 09:19:30.289--ServerSession(2059288)--Connection(16022259)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--Connected: jdbc:oracle:thin:@//127.0.0.1:1521/orcl
	User: STAT
	Database: Oracle  Version: Oracle Database 11g Release 11.1.0.0.0 - Production
	Driver: Oracle JDBC driver  Version: 11.1.0.6.0-Production+
[EPS Finest]: 2008.04.09 09:19:30.289--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--sequencing connected, state is Preallocation_NoTransaction_State
[EPS Finest]: 2008.04.09 09:19:30.289--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--sequence STAT_CLASS_SEQ_GENERATOR: preallocation size 25
[EPS Info]: 2008.04.09 09:19:30.336--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--file:/C:/opt/oc4j11samba/j2ee/home/applications/jpaELTestEAR/jpaELTestWeb/WEB-INF/classes/-statJPATopLinkJ2EE login successful
[EPS Finest]: 2008.04.09 09:19:30.336--ServerSession(2059288)--Thread(Thread[HTTPThreadGroup-1,9,HTTPThreadGroup])--End deploying Persistence Unit statJPATopLinkJ2EE; state Deployed; factoryCount 2
*Exercise your application in a browser by requesting a JPQL query
<pre>
http://127.0.0.1:8888/jpaELTest/FrontController?action=query&jpql=select%20object(e)%20from%20StatClass%20e%20where%20e.id<100
  • Browser Output
action: query
JPQL: select object(e) from StatClass e where e.id<100
99 Results
1 org.eclipse.persistence.example.navigation.business.StatClass@15c0102

References

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