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List:       rampart-dev
Subject:    [jira] Resolved: (AXIS2-4349) Child first class loading
From:       "Andreas Veithen (JIRA)" <jira () apache ! org>
Date:       2010-12-28 18:58:46
Message-ID: 26553558.47591293562726111.JavaMail.jira () thor
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     [ https://issues.apache.org/jira/browse/AXIS2-4349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

Andreas Veithen resolved AXIS2-4349.
------------------------------------

       Resolution: Fixed
    Fix Version/s: 1.6

This was actually implemented by r776555 and r776612.

> Child first class loading
> -------------------------
> 
> Key: AXIS2-4349
> URL: https://issues.apache.org/jira/browse/AXIS2-4349
> Project: Axis2
> Issue Type: Improvement
> Reporter: Amila Chinthaka Suriarachchi
> Fix For: 1.6
> 
> Attachments: child_first_class_loading.patch, classloaderpatch.txt
> 
> 
> Currently Axis2 follows the parent first class loading for service and module \
> loading.  The reason for this is it uses DeploymentClassLoader loader which is \
> extended from the ClassLoader class. The loadClass method of the ClassLoader class \
> looks like this. protected synchronized Class<?> loadClass(String name, boolean \
> resolve)  throws ClassNotFoundException
> {
> 	// First, check if the class has already been loaded
> 	Class c = findLoadedClass(name);
> 	if (c == null) {
> 	    try {
> 		if (parent != null) {
> 		    c = parent.loadClass(name, false);
> 		} else {
> 		    c = findBootstrapClass0(name);
> 		}
> 	    } catch (ClassNotFoundException e) {
> 	        // If still not found, then invoke findClass in order
> 	        // to find the class.
> 	        c = findClass(name);
> 	    }
> 	}
> 	if (resolve) {
> 	    resolveClass(c);
> 	}
> 	return c;
> }
> it first check for parent class loader classes and then for its classes. So we can \
> add child first class loading simply reversing this order in a override loadClass \
> method as follows. protected synchronized Class<?> loadClass(String name, boolean \
> resolve) throws ClassNotFoundException { Class c = findLoadedClass(name);
> if (c == null) {
> try {
> c = findClass(name);
> } catch (Exception e) {
> c = super.loadClass(name, resolve);
> }
> }
> return c;
> }

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