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EclipseLink/Development/JPA 2.0/weblogic

< EclipseLink‎ | Development‎ | JPA 2.0
Revision as of 11:50, 2 December 2009 by Michael.obrien.oracle.com (Talk | contribs) (Analysis)

Running JPA 2.0 API on WebLogic 10.3

Analysis

  • EclipseLink 1.2 and 2.0+ fully implement the JPA 2.0 specification via enhancement # 248291 and are the RI for the GlassFish V3 JEE6 server. In order to use this functionality the 2.0 version of the JPA specification jar - javax.persistence.jar must be added higher in the WebLogic server classpath see enhancement # 296271.
  • Now, you may have noticed that the modules/org.eclipse.persistence_1.0.0.0_1-2-0.jar jar contains JPA 2.0 API implementation classes such as org.eclipse.persistence.internal.jpa.metamodel - however this API is not available through interface classes (because only the javax.persistence 1.0 is present) and we also are missing the services file for Criteria/Metamodel - in any case a predeploy should fail where the EAR contains JPA 2.0 API out of the box.

Design

Design Issue 1: JSR-317 JPA 2.0 EJB 3.1 Support

DI 1: Problem

  • The modules currently shipped with WebLogic 10.3.2.0 (Patch Set 1) in are the following JPA 1.0 compatible versions - these must be overriden in order to run JPA 2.0 API.
    • modules/org.eclipse.persistence_1.0.0.0_1-2-0.jar
    • modules/javax.persistence_1.0.0.0_1-0-2.jar

DI 1: Alternative 1: Manual overwrite of eclipselink and javax.persistence libraries in modules

  • Current solution - this should be deprecated.

DI 1: Alternative 2: Reference higher in the server classpath via commEnv.cmd

  • Workable solution but it has issues
    • The server now runs a single version of the two libraries for all applications - this may not be compatible with older applications or other JPA providers running on the server.

DI 1: Solution

  • In <WEBLOGIC_HOME>\wlserver_10.3\common\bin\commEnv.cmd
    • change
      • set WEBLOGIC_CLASSPATH=%JAVA_HOME%\lib\tools.jar...
    • To
      • set WEBLOGIC_CLASSPATH=F:/view_w35d/jpa/plugins/javax.persistence_2.0.0.v200911041116.jar;%JAVA_HOME%\lib\tools.jar...
      • where F:/view_w35d == %SVN_TRUNK
  • Note: do not use the javax.persistence_2.0_preview.jar - the dated javax.persistence_2.0.0.v200911041116.jar one is the final PFD version for the JPA 2.0 specification.

DI 1: Alternative 3: Application Level Shared Library

  • 20091202 - scope is not large enough - deprecated.

DI 1: Alternative 4: Global Level Shared Library

Weblogic shared libraries in eclipse preferences.jpg

DI 1: Alternative 5: Domain Extension Template

  • 20091202 - This one suggested by Doug - similar to what is done for other vendor libraries.

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