Java Doc for ClassLoaderFactory.java in  » ESB » open-esb » com » sun » jbi » framework » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ESB » open esb » com.sun.jbi.framework   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.sun.jbi.framework.ClassLoaderFactory ClassLoaderFactory final public class ClassLoaderFactory (Code) This is the implementation of the ClassLoaderFactory. It acts as a factory and cache to create and retrieve different types of classloaders and classloader chains for use in the JBI Framework. Examples include Component ClassLoaders, Bootstrap Classloaders, Shared Classloaders. author:    Sun Microsystems, Inc. Method Summary public  ClassLoader createBootstrapClassLoader(Component component)      Creates and returns the installation bootstrap classloader for a JBI component. This instance is not cached by the ClassLoaderFactory as these are created and used infrequently. public  ClassLoader createComponentClassLoader(Component component)      Creates and returns the classloader for a JBI component. It is used to load classes in the classpath of a component installed in the JBI namespace. public  ClassLoader createSharedClassLoader(SharedLibrary sharedLib)      Creates and returns the classloader for a Shared Library. This classloader is used to load classes belonging to libraries that are shared between two or more JBI components. Parameters:   sharedLib - A SharedLibrary object representing the library. throws:   javax.jbi.JBIException - If the shared classloader cannot besuccessfully created. throws:   java.lang.IllegalArgumentException - If a null argument isreceived. public  ClassLoader getComponentClassLoader(String componentId)      Returns the classloader of a JBI component (binding or engine). This method is typically called by components such as NMS after the initial class loader creation by the ComponentFramework. public static  ClassLoaderFactory getInstance()      Returns a singleton instance of the ClassLoaderFactory class. public  ClassLoader getSharedClassLoader(String sharedLibId)      Returns the classloader for a Shared Library. This shared class loader is shared between two or more components installed in the JBI namespace. This method is typically called by components such as NMR after the initial class loader creation by the ComponentFramework. public  void removeComponentClassLoader(String componentId)      Removes the classloader of a JBI component. public  void removeSharedClassLoader(String sharedLibId)      Destroys the classloader for a Shared Library. This method should be called only when the corresponding Shared Library is being destroyed. Method Detail createBootstrapClassLoader public ClassLoader createBootstrapClassLoader(Component component) throws JBIException(Code) Creates and returns the installation bootstrap classloader for a JBI component. This instance is not cached by the ClassLoaderFactory as these are created and used infrequently. The bootstrap classloader is used to bootstrap the installation of a binding/engine. Parameters:   component - runtime representation of the component. throws:   javax.jbi.JBIException - if the classloader could not be created. throws:   java.lang.IllegalArgumentException - if a null or empty list ofclass path elements is found. An instance of the Bootstrap classloader. createComponentClassLoader public ClassLoader createComponentClassLoader(Component component) throws JBIException(Code) Creates and returns the classloader for a JBI component. It is used to load classes in the classpath of a component installed in the JBI namespace. It is important that all shared libraries that are referenced by this component are already installed by the time a call to this method is made as it needs these to create the DelegatingClassLoader chain. Parameters:   component - reference to the component object throws:   java.lang.SecurityException - If the current thread does not have permissions to create a class loader. throws:   JBIException - if class loader cannot be created.create a class loader. throws:   IllegalArgumentException - if a null component is passed in The component classloader. createSharedClassLoader public ClassLoader createSharedClassLoader(SharedLibrary sharedLib) throws JBIException(Code) Creates and returns the classloader for a Shared Library. This classloader is used to load classes belonging to libraries that are shared between two or more JBI components. Parameters:   sharedLib - A SharedLibrary object representing the library. throws:   javax.jbi.JBIException - If the shared classloader cannot besuccessfully created. throws:   java.lang.IllegalArgumentException - If a null argument isreceived. The shared library classloader. getComponentClassLoader public ClassLoader getComponentClassLoader(String componentId) throws JBIException(Code) Returns the classloader of a JBI component (binding or engine). This method is typically called by components such as NMS after the initial class loader creation by the ComponentFramework. Hence there should always be a valid classloader for a valid component. If this method throws an exception,it probably means that the component was not installed correctly or that an invalid component id was passed in. Parameters:   componentId - the id of the binding or engine throws:   JBIException - If there is no class loader available for thecomponent. The classloader for the component. getInstance public static ClassLoaderFactory getInstance()(Code) Returns a singleton instance of the ClassLoaderFactory class. The instance of the ClassLoaderFactory getSharedClassLoader public ClassLoader getSharedClassLoader(String sharedLibId) throws JBIException(Code) Returns the classloader for a Shared Library. This shared class loader is shared between two or more components installed in the JBI namespace. This method is typically called by components such as NMR after the initial class loader creation by the ComponentFramework. Hence there should always be a valid classloader for a valid Shared Library. If this method throws an exception,it probably means that the library was not installed correctly or that an invalid Shared Library ID was passed in. Parameters:   sharedLibId - The id of the Shared Library. throws:   JBIException - If there is no class loader available for the Shared Library. The Shared Library classloader. removeComponentClassLoader public void removeComponentClassLoader(String componentId) throws JBIException(Code) Removes the classloader of a JBI component. This should only be called when a component is being uninstalled. Parameters:   componentId - The component ID throws:   JBIException - If the classloader cannot be removed. throws:   IllegalArgumentException - If a null component ID is passed in. removeSharedClassLoader public void removeSharedClassLoader(String sharedLibId) throws JBIException(Code) Destroys the classloader for a Shared Library. This method should be called only when the corresponding Shared Library is being destroyed. There should never be a condition where a shared classloader does not exist for an active Shared Library. Parameters:   sharedLibId - Shared Library ID. throws:   javax.jbi.JBIException - If a shared classloader cannot be removed. throws:   java.lang.IllegalArgumentException - If a null argument is received. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)