org.apache.brooklyn.core.feed

Class AttributePollHandler<V>

java.lang.Object

org.apache.brooklyn.core.feed.AttributePollHandler<V>

All Implemented Interfaces:

PollHandler<V>

public class AttributePollHandler<V>
extends java.lang.Object
implements PollHandler<V>

Handler for when polling an entity's attribute. On each poll result the entity's attribute is set. Calls to onSuccess and onError will happen sequentially, but may be called from different threads each time. Note that no guarantees of a synchronized block exist, so additional synchronization would be required for the Java memory model's "happens before" relationship.

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	log

Constructor Summary

Constructors

Constructor and Description
AttributePollHandler(FeedConfig<V,?,?> config, Entity entity, AbstractFeed feed)

Method Summary

Modifier and Type	Method and Description
boolean	checkSuccess(V val)
java.lang.String	getDescription()
void	onException(java.lang.Exception exception)
void	onFailure(V val)
void	onSuccess(V val)
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

log

public static final org.slf4j.Logger log

Constructor Detail

AttributePollHandler

public AttributePollHandler(FeedConfig<V,?,?> config,
                            Entity entity,
                            AbstractFeed feed)

Method Detail

checkSuccess

public boolean checkSuccess(V val)

Specified by:

checkSuccess in interface PollHandler<V>

onSuccess

public void onSuccess(V val)

Specified by:

onSuccess in interface PollHandler<V>

onFailure

public void onFailure(V val)

Specified by:

onFailure in interface PollHandler<V>

onException

public void onException(java.lang.Exception exception)

Specified by:

onException in interface PollHandler<V>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getDescription

public java.lang.String getDescription()

Specified by:

getDescription in interface PollHandler<V>