dermi.util
Class BusClassLoader

java.lang.Object
  java.lang.ClassLoader
      dermi.util.BusClassLoader

All Implemented Interfaces:

RemoteEventListener

public class BusClassLoader
extends java.lang.ClassLoader
implements RemoteEventListener

This is a custom class loader that makes a request to the remote object for the stub class when this is not found on the local machine. The remote object then sends the stub class using the event service and the BusClassLoader loads it in the custom virtual machine enabling highly dynamic remote applications.
The difference between Java RMI is that each object is then responsible for returning the stub class for remote clients.

Version:

1.2

Author:

Carles Pairot , Pedro Garcia

Constructor Summary

BusClassLoader(java.util.Properties env)
Class constructor

Method Summary

java.util.Hashtable	anycallEventArrived(java.util.Hashtable evt) Standard upcall for anycall arrived events
void	close() This method should be used before closing any instance of this class
void	defineClass(java.lang.String className, byte[] data)
void	eventArrived(java.util.Hashtable evt) This method is called whenever an event is received
java.lang.Class	loadClass(java.lang.String name, boolean resolve) Method for remote class to load the specifed class

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, 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

Constructor Detail

BusClassLoader

public BusClassLoader(java.util.Properties env)

Class constructor

Parameters:

env - Properties Environment properties

Method Detail

eventArrived

public void eventArrived(java.util.Hashtable evt)

This method is called whenever an event is received

Specified by:

eventArrived in interface RemoteEventListener

Parameters:

evt - Hashtable Event data

anycallEventArrived

public java.util.Hashtable anycallEventArrived(java.util.Hashtable evt)
                                        throws UnmatchedAnycallMethodException

Description copied from interface: RemoteEventListener

Standard upcall for anycall arrived events

Specified by:

anycallEventArrived in interface RemoteEventListener

Parameters:

evt - Hashtable

Returns:

Hashtable

Throws:

UnmatchedAnycallMethodException

close

public void close()

This method should be used before closing any instance of this class

loadClass

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

Method for remote class to load the specifed class

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - Complete class name

resolve - Boolean look up remotely.

Throws:

java.lang.ClassNotFoundException - Problem with the loaded class: not found.

defineClass

public void defineClass(java.lang.String className,
                        byte[] data)