com.tangosol.net.cache

Class ContinuousQueryCache.ServiceListener

java.lang.Object

com.tangosol.net.cache.ContinuousQueryCache.ServiceListener

All Implemented Interfaces:

MemberListener, EventListener

Enclosing class:

ContinuousQueryCache<K,V_BACK,V_FRONT>

protected class ContinuousQueryCache.ServiceListener
extends Object
implements MemberListener

MemberListener for the underlying cache's service.

The primary goal of that listener is invalidation of the ContinuousQueryCache in case of the corresponding CacheService [automatic] restart.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ServiceListener()

Method Summary

Modifier and Type	Method and Description
void	memberJoined(MemberEvent evt) Invoked when a Member has joined the service.
void	memberLeaving(MemberEvent evt) Invoked when a Member is leaving the service.
void	memberLeft(MemberEvent evt) Invoked when a Member has left the service.
String	toString() Produce a human-readable description of this object.

Methods inherited from class java.lang.Object

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

Constructor Detail

ServiceListener

protected ServiceListener()

Method Detail

memberJoined

public void memberJoined(MemberEvent evt)

Description copied from interface: MemberListener

Invoked when a Member has joined the service.

Note: this event could be called during the service restart on the local node (evt.isLocal()) in which case the listener's code should not attempt to use any clustered cache or service functionality.

The most critical situation arises when a number of threads are waiting for a local service restart, being blocked by a Service object synchronization monitor. Since the Joined event should be fired only once, it is called on an event dispatcher thread while holding a synchronization monitor. An attempt to use other clustered service functionality during this local event notification may result in a deadlock.

Specified by:

memberJoined in interface MemberListener

Parameters:

evt - the MemberEvent.MEMBER_JOINED event

memberLeaving

public void memberLeaving(MemberEvent evt)

Description copied from interface: MemberListener

Invoked when a Member is leaving the service.

Specified by:

memberLeaving in interface MemberListener

Parameters:

evt - the MemberEvent.MEMBER_LEAVING event

memberLeft

public void memberLeft(MemberEvent evt)

Description copied from interface: MemberListener

Invoked when a Member has left the service.

Note: this event could be called during the service restart on the local node (evt.isLocal()) in which case the listener's code should not attempt to use any clustered cache or service functionality.

Specified by:

memberLeft in interface MemberListener

Parameters:

evt - the MemberEvent.MEMBER_LEFT event

toString

public String toString()

Produce a human-readable description of this object.

Overrides:

toString in class Object

Returns:

a String describing this object