org.symphonyoss.s2.canon.runtime.cache

Class Monitor<K,V extends Comparable<V>>

java.lang.Object

org.symphonyoss.s2.canon.runtime.SynchronousProducer<V>

org.symphonyoss.s2.canon.runtime.cache.Monitor<K,V>

Type Parameters:

K - The key type

V - The value type

All Implemented Interfaces:

IMonitor<V>, IProducer<V>, IProducerImpl<V>

public class Monitor<K,V extends Comparable<V>>
extends SynchronousProducer<V>
implements IMonitor<V>

An implementation of IMonitor based upon an IProducer which calls listeners in the current thread. Listeners are obliged to return quickly and should not block.

Author:

bruce.skingle

Constructor Summary

Constructors

Constructor and Description
Monitor(V value)

Method Summary

Modifier and Type	Method and Description
void	addListener(org.symphonyoss.s2.fugue.pipeline.IConsumer<V> listener, org.symphonyoss.s2.fugue.core.trace.ITraceContext trace) Add the given listener and optionally call back immediately with the current value.
V	getValue()
Monitor<K,V>	setValue(V value, org.symphonyoss.s2.fugue.core.trace.ITraceContext trace)
Monitor<K,V>	setValueIfGreater(V value, org.symphonyoss.s2.fugue.core.trace.ITraceContext trace)

Methods inherited from class org.symphonyoss.s2.canon.runtime.SynchronousProducer

addListener, notify, produce, removeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.symphonyoss.s2.canon.runtime.IProducer

addListener, removeListener

Constructor Detail

Monitor

public Monitor(V value)

Method Detail

getValue

public V getValue()

Specified by:

getValue in interface IMonitor<V extends Comparable<V>>

setValueIfGreater

public Monitor<K,V> setValueIfGreater(V value,
                                      org.symphonyoss.s2.fugue.core.trace.ITraceContext trace)

Specified by:

setValueIfGreater in interface IMonitor<V extends Comparable<V>>

setValue

public Monitor<K,V> setValue(V value,
                             org.symphonyoss.s2.fugue.core.trace.ITraceContext trace)

Specified by:

setValue in interface IMonitor<V extends Comparable<V>>

addListener

public void addListener(org.symphonyoss.s2.fugue.pipeline.IConsumer<V> listener,
                        org.symphonyoss.s2.fugue.core.trace.ITraceContext trace)

Description copied from interface: IMonitor

Add the given listener and optionally call back immediately with the current value.

Specified by:

addListener in interface IMonitor<V extends Comparable<V>>

Parameters:

listener - A listener which will be called whenever the value of this monitor changes.

trace - If non-null then call the listener with the current value and the given trace context.