winstone.classLoader

Class WebappClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

winstone.classLoader.WebappClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

ReloadingClassLoader

public class WebappClassLoader
extends 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

Fields

Modifier and Type	Field and Description
protected ClassLoader	system

Constructor Summary

Constructors

Constructor and Description
WebappClassLoader(URL[] urls)
WebappClassLoader(URL[] urls, ClassLoader parent)
WebappClassLoader(URL[] urls, ClassLoader parent, URLStreamHandlerFactory factory)

Method Summary

Methods

Modifier and Type	Method and Description
InputStream	getResourceAsStream(String name)
protected Class	loadClass(String name, boolean resolve)

Methods inherited from class java.net.URLClassLoader

addURL, close, 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, getClassLoadingLock, getPackage, getPackages, getParent, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, registerAsParallelCapable, 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 ClassLoader system

Constructor Detail

WebappClassLoader

public WebappClassLoader(URL[] urls)

WebappClassLoader

public WebappClassLoader(URL[] urls,
                 ClassLoader parent)

WebappClassLoader

public WebappClassLoader(URL[] urls,
                 ClassLoader parent,
                 URLStreamHandlerFactory factory)

Method Detail

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class URLClassLoader