org.jboss.aerogear.unifiedpush.message.jms

Class MetricCollectionTrigger

java.lang.Object

org.jboss.aerogear.unifiedpush.message.jms.MetricCollectionTrigger

public class MetricCollectionTrigger
extends Object

Receives TriggerVariantMetricCollectionEvents and turns them into one TriggerMetricCollectionEvent. Since TriggerMetricCollectionEvent should be send exactly once, it maintains set of IDs that metrics processing was started for. It also rechecks in DB whether metrics processing already started. When metrics processing is starting, it broadcast that information via a topic to nodes in the cluster.

Constructor Summary

Constructors

Constructor and Description
MetricCollectionTrigger()

Method Summary

Modifier and Type	Method and Description
void	markMetricsProcessingAsStarted(MetricsProcessingStartedEvent event)
void	tryToStartMetricCollection(TriggerVariantMetricCollectionEvent event) Receives TriggerVariantMetricCollectionEvent event from JMS and determines whether a TriggerMetricCollectionEvent should be sent as reaction or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetricCollectionTrigger

public MetricCollectionTrigger()

Method Detail

tryToStartMetricCollection

public void tryToStartMetricCollection(@Observes
                                       TriggerVariantMetricCollectionEvent event)

Receives TriggerVariantMetricCollectionEvent event from JMS and determines whether a TriggerMetricCollectionEvent should be sent as reaction or not. It check with shared Set of IDs that metrics processing already started for, and if no record is there, it rechecks in DB.

Parameters:

event - the event dequeued from JMS

markMetricsProcessingAsStarted

public void markMetricsProcessingAsStarted(@Observes
                                           MetricsProcessingStartedEvent event)
                                    throws javax.jms.JMSException

Throws:

javax.jms.JMSException