org.jgroups.blocks
Class MembershipListenerAdapter

java.lang.Object
  org.jgroups.blocks.MembershipListenerAdapter

All Implemented Interfaces:

MembershipListener

Direct Known Subclasses:

PartitionedHashMap.ArrayBasedConsistentHashFunction, PartitionedHashMap.ConsistentHashFunction

public class MembershipListenerAdapter
extends java.lang.Object
implements MembershipListener

This class provides multiplexing possibilities for MembershipListener instances. Usually, we have more than one instance willing to listen to membership messages. PullPushAdapter allows only one instance of MembershipListener to be registered for message notification. With help of this class you can overcome this limitation.

Author:

Roman Rokytskyy (rrokytskyy@acm.org)

Field Summary

protected java.util.HashSet	membershipListeners
protected MembershipListener[]	membershipListenersCache

Constructor Summary

MembershipListenerAdapter()

Method Summary

void	addMembershipListener(MembershipListener listener) Add membership listener to this adapter.
void	block() Notify membership listeners to temporarily stop sending messages into a channel.
void	removeMembershipListener(MembershipListener listener) Remove membership listener from this adapter.
void	suspect(Address suspected_mbr) Notify membership listener that some node was suspected.
void	unblock()
void	viewAccepted(View new_view) Notify membership listener that new view was accepted.

Methods inherited from class java.lang.Object

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

Field Detail

membershipListeners

protected final java.util.HashSet membershipListeners

membershipListenersCache

protected MembershipListener[] membershipListenersCache

Constructor Detail

MembershipListenerAdapter

public MembershipListenerAdapter()

Method Detail

block

public void block()

Notify membership listeners to temporarily stop sending messages into a channel. This method in turn calls same method of all registered membership listener.

Specified by:

block in interface MembershipListener

unblock

public void unblock()

suspect

public void suspect(Address suspected_mbr)

Notify membership listener that some node was suspected. This method in turn passes suspected member address to all registered membership listeners.

Specified by:

suspect in interface MembershipListener

viewAccepted

public void viewAccepted(View new_view)

Notify membership listener that new view was accepted. This method in turn passes new view to all registered membership listeners.

Specified by:

viewAccepted in interface MembershipListener

addMembershipListener

public void addMembershipListener(MembershipListener listener)

Add membership listener to this adapter. This method registers listener to be notified when membership event is generated.

Parameters:

listener - instance of MembershipListener that should be added to this adapter.

removeMembershipListener

public void removeMembershipListener(MembershipListener listener)

Remove membership listener from this adapter. This method deregisters listener from notification when membership event is generated.

Parameters:

listener - instance of MembershipListener that should be removed from this adapter.