Package org.infinispan.counter.impl.listener

Class CounterManagerNotificationManager

java.lang.Object

org.infinispan.counter.impl.listener.CounterManagerNotificationManager

public class CounterManagerNotificationManager
extends Object

It manages all the caches events and handles them. Also, it handles the user-specific CounterListener.

When a particular key is updated, its update is send to the counter, via CounterEventGenerator.generate(CounterKey, CounterValue), and the result CounterEvent is used to notify the users CounterListener.

Also listens to topology changes in the cache to update the WeakCounter preferred keys, via TopologyChangeListener.topologyChanged().

An user's CounterListener is invoked in sequence (i.e. only the next update is invoked when the previous one is handled) but it can be invoked in different thread.

Since:

9.2

Author:

Pedro Ruivo

Constructor Summary

Constructors

Constructor	Description
CounterManagerNotificationManager()

Method Summary

Modifier and Type	Method	Description
void	registerCounter(org.infinispan.util.ByteString counterName, CounterEventGenerator generator, TopologyChangeListener topologyChangeListener)	It registers a new counter created locally.
void	registerCounterValueListener()	It registers the clustered cache listener if they aren't already registered.
void	registerTopologyListener()	It registers the topology cache listener if they aren't already registered.
<T extends org.infinispan.counter.api.CounterListener> org.infinispan.counter.api.Handle<T>	registerUserListener(org.infinispan.util.ByteString counterName, T userListener)	It registers an user's CounterListener for a specific counter.
void	removeCounter(org.infinispan.util.ByteString counterName)	It removes and stops sending notification to the counter.
void	setCache(org.infinispan.Cache<CounterKey,CounterValue> cache)
void	stop()
void	useBlockingManager(org.infinispan.util.concurrent.BlockingManager blockingManager)	The blockingManager to use where the user's CounterListener is invoked.

Methods inherited from class java.lang.Object

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

Constructor Detail

CounterManagerNotificationManager

public CounterManagerNotificationManager()

Method Detail

useBlockingManager

public void useBlockingManager(org.infinispan.util.concurrent.BlockingManager blockingManager)

The blockingManager to use where the user's CounterListener is invoked.

Parameters:

blockingManager - The BlockingManager to use.

registerCounter

public void registerCounter(org.infinispan.util.ByteString counterName,
                            CounterEventGenerator generator,
                            TopologyChangeListener topologyChangeListener)

It registers a new counter created locally.

Parameters:

counterName - The counter's name.

generator - The counter's CounterEvent generator.

topologyChangeListener - The counter's listener to topology change. It can be null.

Throws:

IllegalStateException - If the counter with that name is already registered.

registerUserListener

public <T extends org.infinispan.counter.api.CounterListener> org.infinispan.counter.api.Handle<T> registerUserListener(org.infinispan.util.ByteString counterName,
                                                                                                                        T userListener)

It registers an user's CounterListener for a specific counter.

Parameters:

counterName - The counter's name to listen.

userListener - The CounterListener to be invoked.

Returns:

The Handle for the CounterListener.

setCache

public void setCache(org.infinispan.Cache<CounterKey,CounterValue> cache)

registerCounterValueListener

public void registerCounterValueListener()

It registers the clustered cache listener if they aren't already registered.

This listener receives notification when a counter's value is updated.

registerTopologyListener

public void registerTopologyListener()

It registers the topology cache listener if they aren't already registered.

stop

public void stop()

removeCounter

public void removeCounter(org.infinispan.util.ByteString counterName)

It removes and stops sending notification to the counter.

Parameters:

counterName - The counter's name to remove.