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<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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About JBoss5 classloader
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reply from <a href="http://community.jboss.org/people/jnesta">nesta fdb</a> in <i>JBoss Microcontainer</i> - <a href="http://community.jboss.org/message/555092#555092">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi Ales,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you very much.</p><blockquote class="jive-quote"><br/><p>Yup, both should be in the same domain - DefaultDomain.</p><p>How can you tell B is not visible to A?</p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>A.java snippet<br/>public class A {<br/>     public void start() {<br/>          System.out.println(this.getClass()..getClassLoader());<br/>          // and print parent and ancestor classloader<br/>          System.out.println(new B());<br/>     }<br/>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When JBoss starts, NoClassDefFoundError is thrown out.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>According to my understanding, two BaseClassLoader instances for a.beans and b.beans share a same class repository (DefaultDomain). If B is visible to A, then BaseClassLoader for a.beans can load class B. <br/>The scenario contains servel steps:<br/>1. BaseClassLoaders are registered to class repository (DefaultDomain)<br/>2. BaseClassLoader for a.beans trys to load class B, and it trys from class repository, but it can't find. <br/>3. Because BaseClassLoader for b.beans declares that it can load class B<br/>4. Class repository delegates BaseClassLoader for b.beans to load class B</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But this doesn't explain why NoClassDefFoundError happens.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Another question:<br/>When is contextClassLoader of current thread set in JBoss5?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Regards,<br/>Nesta</p></div>
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