Ryan,
Maybe this will help. I don't have a standalone war, but an ear, and I figured out how to have the jar that contains the entities and the jar that contains the persistence.xml at the same level. Since I actually have multiple ejb jars with entities, this makes it so all I have to do is note that in persistence.xml. I think it's relevant to your situation and i think these are the important bits:
layout:
app.ear
-- core.jar
-- web.war
-- persistence.jar (contains only persistence.xml)
persistence.xml has:
<jar-file>core.jar</jar-file>
pom.xml for web.war has stuff to generate classpath in manifest.mf and keep duplicate jars out, which may or may not matter to you:
[code]
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<archive>
<addMavenDescriptor>false</addMavenDescriptor>
</archive>
<outputFileNameMapping>@{artifactId}@.@{extension}@</outputFileNameMapping>
<packagingExcludes>WEB-INF/lib/*.jar</packagingExcludes>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
<webresource>
<excludes>**/persistence.xml</excludes>
</webresource>
</configuration>
</plugin>
[/code]
pom.xml for app.ear has:
[code]
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<version>5</version>
<generateApplicationXml>true</generateApplicationXml>
<defaultLibBundleDir>lib</defaultLibBundleDir>
<modules>
<ejbModule>
<groupId>com.xyz</groupId>
<artifactId>core</artifactId>
<bundleFileName>core.jar</bundleFileName>
</ejbModule>
<webModule>
<groupId>com.xyz</groupId>
<artifactId>web</artifactId>
<contextRoot>/web</contextRoot>
<bundleFileName>web.war</bundleFileName>
</webModule>
<jarModule>
<groupId>com.xyz</groupId>
<artifactId>persistence</artifactId>
<bundleDir>/</bundleDir>
<bundleFileName>persistence.jar</bundleFileName>
</jarModule>
</modules>
</configuration>
</plugin>
[/code]
-Jim
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