Class SingletonProducerWorkerFactory<OutputT,MetricsT>

java.lang.Object

io.aleph0.yap.core.worker.SingletonProducerWorkerFactory<OutputT,MetricsT>

Type Parameters:

OutputT - the type of the worker's output

MetricsT - the type of the worker's metrics

All Implemented Interfaces:

Measureable<MetricsT>, ProducerWorkerFactory<OutputT,MetricsT>

public class SingletonProducerWorkerFactory<OutputT,MetricsT>
extends Object
implements ProducerWorkerFactory<OutputT,MetricsT>

A ProducerWorkerFactory that manages a singleton MeasuredProducerWorker and tracks its metrics.

This factory will only create one worker, for which it will return its given worker. All subsequent attempts to create a worker will throw an IllegalStateException.

Constructor Summary

Constructors

Constructor	Description
SingletonProducerWorkerFactory(MeasuredProducerWorker<OutputT,MetricsT> worker)

Method Summary

Modifier and Type	Method	Description
MetricsT	checkMetrics()	Non-destructive check of the metrics.
MetricsT	flushMetrics()	Destructive read of the metrics.
MeasuredProducerWorker<OutputT,MetricsT>	newProducerWorker()	Creates a new worker

Methods inherited from class java.lang.Object

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

Constructor Details

SingletonProducerWorkerFactory

public SingletonProducerWorkerFactory(MeasuredProducerWorker<OutputT,MetricsT> worker)

Method Details

newProducerWorker

public MeasuredProducerWorker<OutputT,MetricsT> newProducerWorker()

Description copied from interface: ProducerWorkerFactory

Creates a new worker

Specified by:

newProducerWorker in interface ProducerWorkerFactory<OutputT,MetricsT>

Returns:

the new worker

checkMetrics

public MetricsT checkMetrics()

Description copied from interface: Measureable

Non-destructive check of the metrics. This should be used to check the state of metrics without clearing them, for example in a TaskController.

Specified by:

checkMetrics in interface Measureable<OutputT>

Returns:

the metrics

flushMetrics

public MetricsT flushMetrics()

Description copied from interface: Measureable

Destructive read of the metrics. This should be used to check and reset the state of metrics, for example by the metrics checking thread.

Specified by:

flushMetrics in interface Measureable<OutputT>

Returns:

the metrics