net.sf.ehcache.cluster
Class NoopCacheCluster

java.lang.Object
  net.sf.ehcache.cluster.NoopCacheCluster

All Implemented Interfaces:

CacheCluster

public class NoopCacheCluster
extends Object
implements CacheCluster

This is a dummy implementation of the CacheCluster (Null Object Pattern). It ignores all listeners and reports no nodes.

Since:

2.0

Author:

Geert Bevin

Field Summary

static CacheCluster

INSTANCE A singleton instance you can use rather than constructing your own.

Constructor Summary

NoopCacheCluster()

Method Summary

boolean	addTopologyListener(ClusterTopologyListener listener) Add a listener for cluster events
ClusterNode	getCurrentNode() Retrieves the ClusterNode instance that corresponds to the current node.
Collection<ClusterNode>	getNodes() Get all the nodes in the cluster
ClusterScheme	getScheme() Always returns the ClusterScheme.NONE
List<ClusterTopologyListener>	getTopologyListeners() Get all the topology listeners
boolean	isClusterOnline() Find out if the current node is connected to the cluster or not
boolean	removeTopologyListener(ClusterTopologyListener listener) Remove a listener for cluster events
ClusterNode	waitUntilNodeJoinsCluster() Waits until the current node has successfully joined the cluster.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final CacheCluster INSTANCE

A singleton instance you can use rather than constructing your own.

Constructor Detail

NoopCacheCluster

public NoopCacheCluster()

Method Detail

getNodes

public Collection<ClusterNode> getNodes()

Get all the nodes in the cluster

Specified by:

getNodes in interface CacheCluster

Returns:

information on all the nodes in the cluster, including ID, hostname, and IP address.

getScheme

public ClusterScheme getScheme()

Always returns the ClusterScheme.NONE

Specified by:

getScheme in interface CacheCluster

Returns:

ClusterScheme.NONE

addTopologyListener

public boolean addTopologyListener(ClusterTopologyListener listener)

Add a listener for cluster events

Specified by:

addTopologyListener in interface CacheCluster

Parameters:

listener - Listener

Returns:

True if already listening

removeTopologyListener

public boolean removeTopologyListener(ClusterTopologyListener listener)

Remove a listener for cluster events

Specified by:

removeTopologyListener in interface CacheCluster

Parameters:

listener - Listener

Returns:

True if not listening

isClusterOnline

public boolean isClusterOnline()

Find out if the current node is connected to the cluster or not

Specified by:

isClusterOnline in interface CacheCluster

Returns:

true if cluster is online otherwise false

getCurrentNode

public ClusterNode getCurrentNode()

Retrieves the ClusterNode instance that corresponds to the current node.

Specified by:

getCurrentNode in interface CacheCluster

Returns:

the ClusterNode instance that corresponds to the current node

waitUntilNodeJoinsCluster

public ClusterNode waitUntilNodeJoinsCluster()

Waits until the current node has successfully joined the cluster.

Specified by:

waitUntilNodeJoinsCluster in interface CacheCluster

Returns:

the ClusterNode instance that corresponds to the current node

getTopologyListeners

public List<ClusterTopologyListener> getTopologyListeners()

Get all the topology listeners

Specified by:

getTopologyListeners in interface CacheCluster

Returns:

a list of all the topology listeners