org.jahia.ajax.gwt.commons.server

Class JGroupsChannelImpl

java.lang.Object

org.jgroups.ReceiverAdapter

org.jahia.ajax.gwt.commons.server.JGroupsChannelImpl

All Implemented Interfaces:

JGroupsChannel, org.jgroups.MembershipListener, org.jgroups.MessageListener, org.jgroups.Receiver

public class JGroupsChannelImpl
extends org.jgroups.ReceiverAdapter
implements JGroupsChannel

JGroupsChannel establishes a connection to a JGroups cluster. It sends/receives over that and forwards the received messages to the appropriate Broadcaster on its node.

Best practice would have only 1 of these per Atmosphere application. Each JGroupsFilter instance has a reference to the singleton JGroupsChannel object and registers its broadcaster via the addBroadcaster() method.

Author:

westraj

Constructor Summary

Constructors

Constructor and Description
JGroupsChannelImpl(org.jgroups.JChannel jChannel, String clusterName) Constructor

Method Summary

Modifier and Type	Method and Description
void	addBroadcaster(org.atmosphere.cpr.Broadcaster broadcaster) Adds/replaces the broadcaster to the JGroupsChannel
void	destroy() Shutdown the cluster.
void	init() Connect to the cluster
void	receive(org.jgroups.Message jgroupMessage)
void	removeBroadcaster(org.atmosphere.cpr.Broadcaster broadcaster) Removes the broadcaster from the JGroupsChannel
void	send(String topic, Object message) Called from a ClusterBroadcastFilter filter() method to send the message over to other Atmosphere cluster nodes

Methods inherited from class org.jgroups.ReceiverAdapter

block, getState, setState, suspect, unblock, viewAccepted

Methods inherited from class java.lang.Object

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

Constructor Detail

JGroupsChannelImpl

public JGroupsChannelImpl(org.jgroups.JChannel jChannel,
                          String clusterName)

Constructor

Parameters:

jChannel - unconnected JGroups JChannel object

clusterName - name of the group to connect the JChannel to

Method Detail

init

public void init()
          throws Exception

Connect to the cluster

Throws:

Exception - if an exception happen during initialization

destroy

public void destroy()

Shutdown the cluster.

receive

public void receive(org.jgroups.Message jgroupMessage)

Specified by:

receive in interface org.jgroups.MessageListener

Overrides:

receive in class org.jgroups.ReceiverAdapter

send

public void send(String topic,
                 Object message)

Called from a ClusterBroadcastFilter filter() method to send the message over to other Atmosphere cluster nodes

Specified by:

send in interface JGroupsChannel

Parameters:

topic - the channel topic

message - the message to send

addBroadcaster

public void addBroadcaster(org.atmosphere.cpr.Broadcaster broadcaster)

Adds/replaces the broadcaster to the JGroupsChannel

Parameters:

broadcaster - add this broadcaster to the channel

removeBroadcaster

public void removeBroadcaster(org.atmosphere.cpr.Broadcaster broadcaster)

Removes the broadcaster from the JGroupsChannel

Parameters:

broadcaster - remove this broadcaster from the channel