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Re: Custom ClassLoader
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created by <a href="https://community.jboss.org/people/irbash">Irfan Basha</a> in <i>JBoss Microcontainer</i> - <a href="https://community.jboss.org/message/804847#804847">View the full discussion</a>
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<div class="jive-rendered-content"><p>Solution: </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>1. Add jboss-beans.xml to WEB-INF: </p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em><deployment xmlns="urn:jboss:bean-deployer:2.0"></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>         </em></span><em style="color: #339966;"> <classloader name="custom-classloader" xmlns="urn:jboss:classloader:1.0"</em></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                    export-all="NON_EMPTY" import-all="true" /></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>          <bean name="CustomCL" class="com.beans.CustomClassLoader"></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                    <constructor></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                              <parameter></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                                        <inject bean="custom-classloader:0.0.0" /></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                              </parameter></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                    </constructor></em></span> </p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>          </bean></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>          <bean name="CB1" class="com.Sample"></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>          <classloader></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>                    <inject bean="CustomCL" /></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em>          </classloader></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em></bean></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em></deployment></em></span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;"><em><br/></em></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>2. Create a CustomClassLoader (com.beans.CustomClassLoader):</p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">public class CustomClassLoader extends ClassLoader</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">{</span><span style="color: #339966;"> </span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   public CustomClassLoader(ClassLoader parent)</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   {</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">      super(parent);</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   }</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   public Class<?> loadClass(String name) throws ClassNotFoundException</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   {</span><span style="color: #339966;">     </span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">          //This simply calls super's loadClass (if run from jboss, it calls BaseClassLoader</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">         return super.loadClass(name);</span><span style="color: #339966;">     </span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   }</span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">   </span></p><p style="background-color: #eef4f9; font-size: 12px; padding: 0 0 0 30px; color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif;"><span style="color: #339966;">}</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Run JBoss, keep a breakpoint in CustomClassLoader.loadClass method. when class com.Sample has to be loaded the breakpoint will be hit. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Regards,</p><p>Irfan</p></div>
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<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/804847#804847">going to Community</a></p>
        <p style="margin: 0;">Start a new discussion in JBoss Microcontainer at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2114">Community</a></p>
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