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POMultiple referenced shared libraries from WebLogic 12c web apps
 

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  1. POMultiple referenced shared libraries from WebLogic 12c web apps
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    <p>I'm trying to use Moxy 2.4.1 (updated JAXB impl) and Jersey 1.17 (updated JAX-RS impl). I have the shared library modules deployed (as libraries) to the server with no problems.</p> <p>In the app (WAR) I'm developing I try to reference them from the weblogic.xml file like so:</p> <pre><code>&lt;library-ref&gt; &lt;library-name&gt;EclipseLink-2.4.1&lt;/library-name&gt; &lt;specification-version&gt;2.4.1&lt;/specification-version&gt; &lt;implementation-version&gt;2.4.1.v20121003-ad44345&lt;/implementation-version&gt; &lt;exact-match&gt;true&lt;/exact-match&gt; &lt;/library-ref&gt; &lt;library-ref&gt; &lt;library-name&gt;Jersey-1.17&lt;/library-name&gt; &lt;specification-version&gt;1.17&lt;/specification-version&gt; &lt;implementation-version&gt;1.17.0&lt;/implementation-version&gt; &lt;exact-match&gt;true&lt;/exact-match&gt; &lt;/library-ref&gt; </code></pre> <p>But only the first referenced library seems to get used. If I use Classloader Analysis Tool (wls-cat) I only see one FilteringClassLoader and the filter pattern only matches the packages for the first shared lib. Switching the order gives me the other library.</p> <p>Looking at <a href="http://xmlns.oracle.com/weblogic/weblogic-web-app/1.4/weblogic-web-app.xsd" rel="nofollow">http://xmlns.oracle.com/weblogic/weblogic-web-app/1.4/weblogic-web-app.xsd</a> shows that library-ref is unbounded.</p> <p>Anything I can do besides merging the shared libraries and only using one library-ref per application?</p> <p>Edit: Please note that I am using Shared Libraries (a WebLogic specific feature) and not Optional Packages (a EE standard feature). The definition of a library is the same with both methods but which types of modules can be libraries and how you reference them are different.</p>
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    1. COPlease see the updated response.
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    2. COPlease see another updated response :) Please take a moment to give it a try. Java EE libraries are optional in the context of applications that are deployed without references to them, vs something on the system classpath, domain classpath or packaged with the artifact being deployed.
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    3. COFound http://docs.oracle.com/cd/E24329_01/web.1211/e24368/libraries.htm#i1073492 which clearly states _When multiple libraries are present, the CLASSPATH/resource path precedence order follows the order in which the library-refs elements appear in the weblogic.xml file._ so multiple shared libraries should work.
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