public class LauncherClassLoader extends java.net.URLClassLoader
LauncherClassLoaderextends the standard Java VM
URLClassLoadersuch, that classes and resources which are contained in the launcher JAR File are never looked up in the parent class loader.
This class loader shields the Sling OSGi framework completely from the environment because
The first point is important if Sling is deployed into any container, which provides some or all of the same packages as the Sling launcher JAR file. One such example is the Glassfish v3 Prelude application service, which itself runs in a Felix OSGi framework and sort of leaks the classes into the web application.
In the general case, we cannot prevent any leaking of classes, which may also be the OSGi core or compendium libraries, into Sling. So, this class loader is the barrier for this leaking and shields Sling from the environment unless explicitly configured to use this leaking.
Instances of this class loader are setup with the launcher JAR file as the
only contents of the
URLClassLoaders class path and the class
loader of this class itself as the parent class loader.
|Modifier and Type||Method and Description|
Return an URL to the requested resource.
Load the name class and optionally resolve it, if found.
addURL, close, definePackage, findClass, findResource, findResources, getPermissions, getResourceAsStream, getURLs, newInstance, newInstance
clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners
protected java.lang.Class<?> loadClass(java.lang.String name, boolean resolve) throws java.lang.ClassNotFoundException
This method checks whether the package of the class is contained in the launcher JAR file. If so, the launcher JAR file is looked up for the class and class loading fails if not found. Otherwise the standard class loading strategy is applied by calling the base class implementation.
public java.net.URL getResource(java.lang.String name)
This method checks whether the package of the resource is contained in the launcher JAR file. If so, the launcher JAR file is looked up for the resource and resource access fails if not found. Otherwise the standard resource access strategy is applied by calling the base class implementation.
Copyright © 2018 The Apache Software Foundation. All rights reserved.