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EAR+WAR+EJB ... cannot find resource ... classloader problem on my side?
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created by <a href="http://community.jboss.org/people/zecas">zecas zecas</a> in <i>Beginner's Corner</i> - <a href="http://community.jboss.org/message/594878#594878">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm having a serious problem putting a project to work. It really is hold back my advance in the project, and I'm getting very frustrated with this.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Maybe someone can help me here ... I hope so.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have the following structure:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>project.ear</p><p>+- load-api.jar</p><p>+- webapp.war</p><p>   +- WEB-INF</p><p>      +- classes</p><p>               +- config.properties</p><p>+- myejb.jar</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Components:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>load-api.jar - jar package that loads stuff, including "config.properties" from classpath.</p><p>Uses something like:</p><p>OneClass.class.getClassLoader().getResourceAsStream( "config.properties" );</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>webapp.war - simple war module, the only one that depends on "load-api.jar"</p><p>Executes a servlet context listener on startup, that will load "config.properties" through "load-api.jar".</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>myejb.jar - simple EJB3 project, that has a simple EJB component that does nothing at this time.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Now I need to use from within the EJB project a class that is defined on "load-api.jar". What I did was just to add a dependency to "load-api.jar", and nothing more (manifest.mf gets updated with jar info). Before I even add a line of code, my project stops working.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What happens: the listener executed from within "webapp.war" fails to find the "config.properties" resource.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The "config.properties" resource is still defined inside the "WEB-INF->classes" folder of the "webapp.war", like before. But seems that the classloader fails to find it, as if it searches for it inside the EJB ...</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I believe this should be normal ... but why is it? Can I change this behaviour? Is it a manifest.mf classpath problem?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This seems to be a matter of classloading-hell, as I've heard of it. The solution is to pull everything to the EJB? And if it is, will it work the same way in other application server JavaEE compliant?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks</p></div>
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