winstone.classLoader
Class WebappClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              winstone.classLoader.WebappClassLoader

Direct Known Subclasses:

ReloadingClassLoader

public class WebappClassLoader
extends java.net.URLClassLoader

Implements the servlet spec model (v2.3 section 9.7.2) for classloading, which is different to the standard JDK model in that it delegates *after* checking local repositories. This has the effect of isolating copies of classes that exist in 2 webapps from each other. Thanks to James Berry for the changes to use the system classloader to prevent loading servlet spec or system classpath classes again.

Version:

$Id: WebappClassLoader.java,v 1.3 2007/12/29 03:32:54 rickknowles Exp $

Author:

Rick Knowles

Field Summary

protected java.lang.ClassLoader

system

Constructor Summary

WebappClassLoader(java.net.URL[] urls)

WebappClassLoader(java.net.URL[] urls, java.lang.ClassLoader parent)

WebappClassLoader(java.net.URL[] urls, java.lang.ClassLoader parent, java.net.URLStreamHandlerFactory factory)

Method Summary

java.io.InputStream	getResourceAsStream(java.lang.String name)
protected java.lang.Class	loadClass(java.lang.String name, boolean resolve)

Methods inherited from class java.net.URLClassLoader

addURL, definePackage, findClass, findResource, findResources, getPermissions, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

system

protected java.lang.ClassLoader system

Constructor Detail

WebappClassLoader

public WebappClassLoader(java.net.URL[] urls)

WebappClassLoader

public WebappClassLoader(java.net.URL[] urls,
                         java.lang.ClassLoader parent)

WebappClassLoader

public WebappClassLoader(java.net.URL[] urls,
                         java.lang.ClassLoader parent,
                         java.net.URLStreamHandlerFactory factory)

Method Detail

loadClass

protected java.lang.Class loadClass(java.lang.String name,
                                    boolean resolve)
                             throws java.lang.ClassNotFoundException

Overrides:

loadClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String name)

Overrides:

getResourceAsStream in class java.lang.ClassLoader