org.atmosphere.gwt.client.impl
Class OperaEventSourceCometTransport

java.lang.Object
  org.atmosphere.gwt.client.impl.BaseCometTransport
      org.atmosphere.gwt.client.impl.OperaEventSourceCometTransport

All Implemented Interfaces:

CometTransport

public class OperaEventSourceCometTransport
extends BaseCometTransport

This class uses Opera's event-source element to stream events.
http://my.opera.com/WebApplications/blog/show.dml/438711

The main issue with Opera's implementation is that we can't detect connection events. To support this three event listeners are setup: one "s" for string messages, one "o" for the GWT serialized object messages, and the other "c" for connection events. The server sends the event "c" as soon as the connection is established and "d" when the connection is terminated. A connection timer is setup to detect initial connection errors. To detect subsequent connection failure it also sends a heart beat events "h" when no messages have been sent for a specified heart beat interval.

Author:

Richard Zschech

Nested Class Summary

Nested classes/interfaces inherited from class org.atmosphere.gwt.client.impl.BaseCometTransport

BaseCometTransport.RPCServerTransport

Field Summary

Fields inherited from class org.atmosphere.gwt.client.impl.BaseCometTransport

client, connectionId, listener, serverTransport

Constructor Summary

OperaEventSourceCometTransport()

Method Summary

void	connect(int connectionCount)
void	disconnect()
void	initiate(AtmosphereClient client, AtmosphereListener listener)

Methods inherited from class org.atmosphere.gwt.client.impl.BaseCometTransport

addUrlParameter, broadcast, broadcast, getServerTransport, getUrl, parse, post, post

Methods inherited from class java.lang.Object

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

Constructor Detail

OperaEventSourceCometTransport

public OperaEventSourceCometTransport()

Method Detail

initiate

public void initiate(AtmosphereClient client,
                     AtmosphereListener listener)

Specified by:

initiate in interface CometTransport

Overrides:

initiate in class BaseCometTransport

connect

public void connect(int connectionCount)

disconnect

public void disconnect()

Specified by:

disconnect in interface CometTransport

Overrides:

disconnect in class BaseCometTransport