dk.brics.jwig.server.comet

Class Synchronizer

java.lang.Object

dk.brics.jwig.server.comet.Synchronizer

public class Synchronizer
extends Object

Synchronizer.

Receives Comet long-polls from clients and sends back update instructions.

Constructor Summary

Constructors

Constructor and Description
Synchronizer() Constructs a new synchronizer.

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy() Invoked by the servlet engine when stopping.
boolean	handleComet(HttpServletRequest request, HttpServletResponse response, CometEvent event) Handles a Comet request from a client.
void	init() Invoked by the servlet engine when starting.
void	update(String name) Invoked when a page fragment has been updated.

Methods inherited from class java.lang.Object

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

Constructor Detail

Synchronizer

public Synchronizer()

Constructs a new synchronizer.

Method Detail

destroy

public void destroy()

Invoked by the servlet engine when stopping.

handleComet

public boolean handleComet(HttpServletRequest request,
                  HttpServletResponse response,
                  CometEvent event)
                    throws IOException,
                           ServletException

Handles a Comet request from a client. Invoked by a Comet handler. For a BEGIN event, the connection is stored and it is checked (using the cache) whether updates are available already. For an END event, the connection is removed.

Returns:

true if request should be closed, false to keep alive

Throws:

IOException

ServletException

init

public void init()

Invoked by the servlet engine when starting.

update

public void update(String name)

Invoked when a page fragment has been updated. Informs all listeners.