org.ow2.easybeans.component.smartclient.client
Class AskingClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              org.ow2.easybeans.component.smartclient.client.AskingClassLoader

public class AskingClassLoader
extends java.net.URLClassLoader

ClassLoader that is used and that ask the EasyBeans remote server.

Author:

Florent Benoit

Constructor Summary

AskingClassLoader(java.lang.String host, int portNumber)
Creates a new classloader by using an empty URL.

Method Summary

protected java.lang.Class<?>	findClass(java.lang.String name) Finds and loads the class with the specified name from the URL search path. If the super classloader doesn't find the class, it ask the remote server to download the class
java.net.URL	findResource(java.lang.String name) Finds the resource with the specified name on the URL search path.
java.lang.String	getProviderURL() Ask and return the remote PROVIDER_URL in order to connect with RMI.
java.nio.ByteBuffer	sendRequest(Message message, java.nio.channels.SocketChannel channel) Sends the given message on the given channel.

Methods inherited from class java.net.URLClassLoader

addURL, definePackage, 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, getPackage, getPackages, getParent, getResource, getResourceAsStream, 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

AskingClassLoader

public AskingClassLoader(java.lang.String host,
                         int portNumber)

Creates a new classloader by using an empty URL.

Parameters:

host - the remote host to connect.

portNumber - the port number for the protocol.

Method Detail

sendRequest

public java.nio.ByteBuffer sendRequest(Message message,
                                       java.nio.channels.SocketChannel channel)

Sends the given message on the given channel.

Parameters:

message - the message to send

channel - the channel used to send the message.

Returns:

the bytebuffer containing the answer (to analyze)

findClass

protected java.lang.Class<?> findClass(java.lang.String name)
                                throws java.lang.ClassNotFoundException

Finds and loads the class with the specified name from the URL search path.
If the super classloader doesn't find the class, it ask the remote server to download the class

Overrides:

findClass in class java.net.URLClassLoader

Parameters:

name - the name of the class

Returns:

the resulting class

Throws:

java.lang.ClassNotFoundException - if the class could not be found

getProviderURL

public java.lang.String getProviderURL()

Ask and return the remote PROVIDER_URL in order to connect with RMI.

Returns:

a string with the PROVIDER_URL value.

findResource

public java.net.URL findResource(java.lang.String name)

Finds the resource with the specified name on the URL search path.
If resource is not found locally, search on the remote side.

Overrides:

findResource in class java.net.URLClassLoader

Parameters:

name - the name of the resource

Returns:

a URL for the resource, or null if the resource could not be found.