org.mortbay.cometd.client.ext
Class AckExtension

java.lang.Object
  org.mortbay.cometd.client.ext.AckExtension

All Implemented Interfaces:

org.cometd.Extension

public class AckExtension
extends Object
implements org.cometd.Extension

AckExtension This client-side extension enables the client to acknowledge to the server the messages that the client has received. For the acknowledgement to work, the server must be configured with the correspondent server-side ack extension. If both client and server support the ack extension, then the ack functionality will take place automatically. By enabling this extension, all messages arriving from the server will arrive via the long poll, so the comet communication will be slightly chattier. The fact that all messages will return via long poll means also that the messages will arrive with total order, which is not guaranteed if messages can arrive via both long poll and normal response. Messages are not acknowledged one by one, but instead a group of messages is acknowledged when long poll returns.

Author:

dyu

Field Summary

static String

EXT_FIELD

Constructor Summary

AckExtension()

Method Summary

org.cometd.Message	rcv(org.cometd.Client from, org.cometd.Message message)
org.cometd.Message	rcvMeta(org.cometd.Client from, org.cometd.Message message)
org.cometd.Message	send(org.cometd.Client from, org.cometd.Message message)
org.cometd.Message	sendMeta(org.cometd.Client from, org.cometd.Message message)

Methods inherited from class java.lang.Object

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

Field Detail

EXT_FIELD

public static final String EXT_FIELD

See Also:

Constant Field Values

Constructor Detail

AckExtension

public AckExtension()

Method Detail

send

public org.cometd.Message send(org.cometd.Client from,
                               org.cometd.Message message)

Specified by:

send in interface org.cometd.Extension

rcv

public org.cometd.Message rcv(org.cometd.Client from,
                              org.cometd.Message message)

Specified by:

rcv in interface org.cometd.Extension

sendMeta

public org.cometd.Message sendMeta(org.cometd.Client from,
                                   org.cometd.Message message)

Specified by:

sendMeta in interface org.cometd.Extension

rcvMeta

public org.cometd.Message rcvMeta(org.cometd.Client from,
                                  org.cometd.Message message)

Specified by:

rcvMeta in interface org.cometd.Extension