springs.classloader
Class ClassFileServer

java.lang.Object
  |
  +--springs.classloader.ClassServer
        |
        +--springs.classloader.ClassFileServer

All Implemented Interfaces:

java.lang.Runnable

public class ClassFileServer

extends ClassServer

The ClassFileServer implements a ClassServer that reads class files from the file system. See the doc for the "Main" method for how to run this server.

Field Summary

private java.lang.String	classpath
private static int	DefaultServerPort

Fields inherited from class springs.classloader.ClassServer

Constructor Summary

ClassFileServer(int port, java.lang.String classpath)
Constructs a ClassFileServer.

Method Summary

byte[]	getBytes(java.lang.String path) Returns an array of bytes containing the bytecodes for the class represented by the argument path.
static void	main(java.lang.String[] args) Main method to create the class server that reads class files.

Methods inherited from class springs.classloader.ClassServer

run

Methods inherited from class java.lang.Object

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

Field Detail

classpath

private java.lang.String classpath

DefaultServerPort

private static int DefaultServerPort

Constructor Detail

ClassFileServer

public ClassFileServer(int port,
                       java.lang.String classpath)
                throws java.io.IOException

Constructs a ClassFileServer.

Parameters:

classpath - the classpath where the server locates classes

Method Detail

getBytes

public byte[] getBytes(java.lang.String path)
                throws java.io.IOException,
                       java.lang.ClassNotFoundException

Returns an array of bytes containing the bytecodes for the class represented by the argument path. The path is a dot separated class name with the ".class" extension removed.

Specified by:

getBytes in class ClassServer

Returns:

the bytecodes for the class

Throws:

java.lang.ClassNotFoundException - if the class corresponding to path could not be loaded.

java.io.IOException - if error occurs reading the class

main

public static void main(java.lang.String[] args)

Main method to create the class server that reads class files. This takes two command line arguments, the port on which the server accepts requests and the root of the classpath. To start up the server:

java ClassFileServer

The codebase of an RMI server using this webserver would simply contain a URL with the host and port of the web server (if the webserver's classpath is the same as the RMI server's classpath):

java -Djava.rmi.server.codebase=http://zaphod:2001/ RMIServer

You can create your own class server inside your RMI server application instead of running one separately. In your server main simply create a ClassFileServer:

new ClassFileServer(port, classpath);