org.jppf.classloader
Class JPPFClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              org.jppf.classloader.AbstractJPPFClassLoaderLifeCycle
                  org.jppf.classloader.AbstractJPPFClassLoader
                      org.jppf.classloader.JPPFClassLoader

public class JPPFClassLoader
extends AbstractJPPFClassLoader

This class is a custom class loader serving the purpose of dynamically loading the JPPF classes and the client application classes, to avoid costly redeployment system-wide.

Author:

Laurent Cohen

Nested Class Summary

protected class

JPPFClassLoader.ResourceRequest Encapsulates a remote resource request submitted asynchronously via the single-thread executor.

Nested classes/interfaces inherited from class org.jppf.classloader.AbstractJPPFClassLoaderLifeCycle

AbstractJPPFClassLoaderLifeCycle.AbstractResourceRequest

Field Summary

Fields inherited from class org.jppf.classloader.AbstractJPPFClassLoaderLifeCycle

cache, dynamic, executor, INITIALIZING, LOCK, requestUuid, serializer, uuidPath

Constructor Summary

JPPFClassLoader(ClassLoader parent)
Initialize this class loader with a parent class loader.

JPPFClassLoader(ClassLoader parent, List<String> uuidPath)
Initialize this class loader with a parent class loader.

Method Summary

void	close() Terminate this classloader and clean the resources it uses.
protected void	init() Initialize the underlying socket connection.
protected JPPFResourceWrapper	loadRemoteData(Map<String,Object> map, boolean asResource) Load the specified class from a socket connection.
void	reset() Reset and reinitialize the connection ot the server.

Methods inherited from class org.jppf.classloader.AbstractJPPFClassLoader

computeRemoteData, findClass, findMultipleResources, findResource, findResources, getMultipleResources, getResourceAsStream, loadJPPFClass

Methods inherited from class org.jppf.classloader.AbstractJPPFClassLoaderLifeCycle

addURL, getSerializer, loadResourceData, loadResourceData0, setRequestUuid

Methods inherited from class java.net.URLClassLoader

definePackage, 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, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

JPPFClassLoader

public JPPFClassLoader(ClassLoader parent)

Initialize this class loader with a parent class loader.

Parameters:

parent - a ClassLoader instance.

JPPFClassLoader

public JPPFClassLoader(ClassLoader parent,
                       List<String> uuidPath)

Initialize this class loader with a parent class loader.

Parameters:

parent - a ClassLoader instance.

uuidPath - unique identifier for the submitting application.

Method Detail

init

protected void init()

Initialize the underlying socket connection.

Specified by:

init in class AbstractJPPFClassLoaderLifeCycle

reset

public void reset()

Reset and reinitialize the connection ot the server.

Specified by:

reset in class AbstractJPPFClassLoaderLifeCycle

close

public void close()

Terminate this classloader and clean the resources it uses.

Specified by:

close in class AbstractJPPFClassLoaderLifeCycle

See Also:

AbstractJPPFClassLoaderLifeCycle.close()

loadRemoteData

protected JPPFResourceWrapper loadRemoteData(Map<String,Object> map,
                                             boolean asResource)
                                      throws Exception

Load the specified class from a socket connection.

Specified by:

loadRemoteData in class AbstractJPPFClassLoaderLifeCycle

Parameters:

map - contains the necessary resource request data.

asResource - true if the resource is loaded using getResource(), false otherwise.

Returns:

a JPPFResourceWrapper containing the resource content.

Throws:

Exception - if the connection was lost and could not be reestablished.