Package org.jgroups

Interface MessageListener

All Known Subinterfaces:

ExtendedMessageListener, ExtendedReceiver, Receiver

All Known Implementing Classes:

Chat, ChatCore, DistributedHashtable, DistributedQueue, DistributedTree, Draw, ExtendedReceiverAdapter, MessageListenerAdapter, NotificationBus, QuoteServer, ReceiverAdapter, ReplicatedHashMap, ReplicatedHashtable, ReplicatedTree, ViewDemo, VotingAdapter, Whiteboard

public interface MessageListener

Allows a listener to be notified when a message arrives. Contrary to the pull-style of channels, some building blocks (e.g., PullPushAdapter) provide an event-like, push-style message delivery model. In this case, the entity to be notified of message reception needs to provide a callback to be invoked whenever a message has been received. The MessageListener interface provides a method to do so.

Method Summary

Modifier and Type	Method	Description
byte[]	getState()	Answers the group state; e.g., when joining.
void	receive(Message msg)	Called when a message is received.
void	setState(byte[] state)	Sets the group state; e.g., when joining.

Method Detail

receive

void receive(Message msg)

Called when a message is received.

Parameters:

msg -

getState

byte[] getState()

Answers the group state; e.g., when joining.

Returns:

byte[]

setState

void setState(byte[] state)

Sets the group state; e.g., when joining.

Parameters:

state -