ch.qos.logback.core.net.server
Class ServerSocketListener<T extends Client>

java.lang.Object
  ch.qos.logback.core.net.server.ServerSocketListener<T>

All Implemented Interfaces:

ServerListener<T>, Closeable

public abstract class ServerSocketListener<T extends Client>
extends Object
implements ServerListener<T>

A ServerListener that accepts connections on a ServerSocket.

Author:

Carl Harris

Constructor Summary

ServerSocketListener(ServerSocket serverSocket)
Constructs a new listener.

Method Summary

T	acceptClient() Accepts the next client that appears on this listener.
void	close() Closes any underlying Closeable resources associated with this listener.
protected abstract T	createClient(String id, Socket socket) Creates the client object for a new socket connection
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ServerSocketListener

public ServerSocketListener(ServerSocket serverSocket)

Constructs a new listener.

Parameters:

serverSocket - server socket delegate

Method Detail

acceptClient

public T acceptClient()
                              throws IOException

Accepts the next client that appears on this listener.

An implementation of this method is expected to block the calling thread and not return until either a client appears or an exception occurs.

Specified by:

acceptClient in interface ServerListener<T extends Client>

Returns:

client object

Throws:

IOException

createClient

protected abstract T createClient(String id,
                                  Socket socket)
                                          throws IOException

Creates the client object for a new socket connection

Parameters:

id - identifier string for the client

socket - client's socket connection

Returns:

client object

Throws:

IOException

close

public void close()

Closes any underlying Closeable resources associated with this listener.

Note that (as described in Doug Lea's discussion about interrupting I/O operations in "Concurrent Programming in Java" (Addison-Wesley Professional, 2nd edition, 1999) this method is used to interrupt any blocked I/O operation in the client when the server is shutting down. The client implementation must anticipate this potential, and gracefully exit when the blocked I/O operation throws the relevant IOException subclass.

Note also, that unlike Closeable.close() this method is not permitted to propagate any IOException that occurs when closing the underlying resource(s).

Specified by:

close in interface ServerListener<T extends Client>

Specified by:

close in interface Closeable

toString

public String toString()

Overrides:

toString in class Object