net.sourceforge.esw.service
Class ClassServer

java.lang.Object
  |
  +--net.sourceforge.esw.service.ClassServer

All Implemented Interfaces:

java.lang.Runnable

public class ClassServer

extends java.lang.Object

implements java.lang.Runnable

Field Summary

protected static java.lang.String	CLASS_NOT_FOUND
protected java.lang.String	codebase
protected static java.lang.String	CODEBASE_PROPERTY
protected static java.lang.String	COLON
protected static java.lang.String	CONTENT_LENGTH
protected static java.lang.String	CONTENT_TYPE
protected static java.lang.String	CONTENT_TYPE2
protected static java.lang.String	CR
protected static java.lang.String	DOT_CLASS
protected static java.lang.String	END_CONTENT_LENGTH
protected static java.lang.String	GET
protected static java.lang.String	HTTP
protected static java.lang.String	HTTP_START
protected java.net.URLClassLoader	loader
protected int	port
protected java.net.ServerSocket	server
protected static java.lang.String	SLASH
protected static java.lang.String	SPACE

Constructor Summary

ClassServer()
Creates a new ClassServer utilizing any availiable port.

ClassServer(int aPort)
Creates a new ClassServer utilizing the specified port.

Method Summary

protected void	establishCodebase() This adds the codebase for this exporter to the list of codebases stored under the java.rmi.server.codebase property.
protected byte[]	getByteArrayFromInputStream(java.io.InputStream inputstream, int i) Gets a byte array from an inputStream, one byte at a time.
protected byte[]	getByteArrayFromInputStream(java.io.InputStream inputstream, int i, int bufferSize) Gets a byte array from an inputStream, one byte at a time.
protected byte[]	getByteCodes(java.lang.String aClassname) Return the bytecodes for the named class.
protected byte[]	getClassFromJarURLs(java.lang.String s) Attempts to retrieve the requested resource from a jar that's part of the loader list
protected java.lang.String	getCodebase() Return the codebase URL that identifies this exporter.
protected boolean	isJarFile(java.lang.String s) Checks to see if this string indicates a jar file
void	run() Services a socket returned by the server socket
void	shutdown() Shuts down the server socket.

Methods inherited from class java.lang.Object

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

Field Detail

server

protected java.net.ServerSocket server

codebase

protected java.lang.String codebase

port

protected int port

loader

protected java.net.URLClassLoader loader

CODEBASE_PROPERTY

protected static final java.lang.String CODEBASE_PROPERTY

HTTP

protected static final java.lang.String HTTP

COLON

protected static final java.lang.String COLON

SLASH

protected static final java.lang.String SLASH

SPACE

protected static final java.lang.String SPACE

HTTP_START

protected static final java.lang.String HTTP_START

CONTENT_LENGTH

protected static final java.lang.String CONTENT_LENGTH

END_CONTENT_LENGTH

protected static final java.lang.String END_CONTENT_LENGTH

CONTENT_TYPE

protected static final java.lang.String CONTENT_TYPE

CLASS_NOT_FOUND

protected static final java.lang.String CLASS_NOT_FOUND

CR

protected static final java.lang.String CR

CONTENT_TYPE2

protected static final java.lang.String CONTENT_TYPE2

GET

protected static final java.lang.String GET

DOT_CLASS

protected static final java.lang.String DOT_CLASS

Constructor Detail

ClassServer

public ClassServer()
            throws java.io.IOException

Creates a new ClassServer utilizing any availiable port.

Throws:

java.io.IOException - If there was a problem initializing the server socket.

ClassServer

public ClassServer(int aPort)
            throws java.io.IOException,
                   java.net.UnknownHostException

Creates a new ClassServer utilizing the specified port.

Parameters:

aPort - The port on which to run the server. Passing in 0 states that any open port may be utilized.

Throws:

java.io.IOException - If there was a problem initializing the server socket.

java.net.UnknownHostException - If the current hostname could not be determined (required for setting the codebase).

Method Detail

shutdown

public void shutdown()

Shuts down the server socket. This is done in a separate thread, as it may take a while...

run

public void run()

Services a socket returned by the server socket

Specified by:

run in interface java.lang.Runnable

getByteCodes

protected byte[] getByteCodes(java.lang.String aClassname)
                       throws java.lang.ClassNotFoundException

Return the bytecodes for the named class. This implementation attempts to find the class as a resource from the class loader specified at construction time (which is usually the context class loader from the thread that constructed the instance).

Parameters:

aClassname - The class to fetch the bytecodes for.

Throws:

java.lang.ClassNotFoundException - If the named class cannot be found.

getCodebase

protected java.lang.String getCodebase()
                                throws java.net.UnknownHostException

Return the codebase URL that identifies this exporter.

Returns:

The codebase of the exporter.

Throws:

java.net.UnknownHostException - If the local hostname could not be determined.

establishCodebase

protected void establishCodebase()
                          throws java.net.UnknownHostException

This adds the codebase for this exporter to the list of codebases stored under the java.rmi.server.codebase property. It will not remove any preexisting codebases.

Throws:

java.net.UnknownHostException - If the local hostname could not be determined.

getClassFromJarURLs

protected byte[] getClassFromJarURLs(java.lang.String s)

Attempts to retrieve the requested resource from a jar that's part of the loader list

Parameters:

String - The path descriptor of the resource

Returns:

the byte array that is this resource, or null if the resource isn't found

isJarFile

protected boolean isJarFile(java.lang.String s)

Checks to see if this string indicates a jar file

Parameters:

String - the name of the resource

Returns:

if this is a jar resource or not

getByteArrayFromInputStream

protected byte[] getByteArrayFromInputStream(java.io.InputStream inputstream,
                                             int i)
                                      throws java.io.IOException

Gets a byte array from an inputStream, one byte at a time. Uses a buffer of the 4096, with an initial size requested

Parameters:

InputStream - the stream to be read from

int - the initial size of the buffered output stream

Returns:

the byte array from this stream

Throws:

java.io.IOException - If there is a problem reading from the stream

getByteArrayFromInputStream

protected byte[] getByteArrayFromInputStream(java.io.InputStream inputstream,
                                             int i,
                                             int bufferSize)
                                      throws java.io.IOException

Gets a byte array from an inputStream, one byte at a time. Uses a buffer of the requested size, with an initial size requested

Parameters:

InputStream - the stream to be read from

int - the initial size of the buffered output stream

int - the number of bytes to read at each pass

Returns:

the byte array from this stream

Throws:

java.io.IOException - If there is a problem reading from the stream