submission.Demo
Class TCPEchoServer

java.lang.Object
  java.lang.Thread
      simnet.Application
          submission.Demo.EchoServer
              submission.Demo.TCPEchoServer

All Implemented Interfaces:

Pluggable, PlugoutListener, java.lang.Runnable, SimnetWindowListener

public class TCPEchoServer

extends EchoServer

implements Pluggable

An example of an EchoServer implemented with UDP. Unlike the UDP example, this echo server only runs on one port at a time.

Nested Class Summary

private class

TCPEchoServer.TCPEchoServerThread The thread that does all of the work for an open port.

Field Summary

(package private) int	connCount
(package private) int	port
(package private) java.util.HashSet	sessions
(package private) ServerSocket	ssock

Fields inherited from class submission.Demo.EchoServer

prefix

Fields inherited from class simnet.Application

appid, appstart, node, NODE_ID, pid, random, sim

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

TCPEchoServer()

Method Summary

void	close() Close the server.
void	close(int dummy) For compatibilty with EchoServer...
void	customInit() This is where an application can do any application-specific initializeation it requires.
void	open(int port) Opens the server.
boolean	prePlugout(java.lang.Object replacement) To cleanup, just clear out the sessions table (the worker threads clean themselves up when sockets close).
void	run() Wait for connections, and spawn a thread to deal with them.
void	status() Print a status report

Methods inherited from class submission.Demo.EchoServer

close, open, setPrefix

Methods inherited from class simnet.Application

closeWindow, finalize, getTitleString, initialize, plugoutNotification, printout, printout, processWindowCommand, rawOut, window

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

port

int port

connCount

int connCount

ssock

transient ServerSocket ssock

sessions

transient java.util.HashSet sessions

Constructor Detail

TCPEchoServer

public TCPEchoServer()

Method Detail

customInit

public void customInit()

Description copied from class: Application

This is where an application can do any application-specific initializeation it requires.

Overrides:

customInit in class Application

open

public void open(int port)

Opens the server.

Specified by:

open in class EchoServer

run

public void run()

Wait for connections, and spawn a thread to deal with them.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class Application

close

public void close()

Close the server.

close

public void close(int dummy)

For compatibilty with EchoServer...

Specified by:

close in class EchoServer

status

public void status()

Print a status report

Specified by:

status in class EchoServer

prePlugout

public boolean prePlugout(java.lang.Object replacement)

To cleanup, just clear out the sessions table (the worker threads clean themselves up when sockets close).

Specified by:

prePlugout in interface Pluggable

Returns:

if this object can now be removed (was the operation sucessful)