Class SingletonConsumerWorkerFactory<InputT,MetricsT>

java.lang.Object

io.aleph0.yap.core.worker.SingletonConsumerWorkerFactory<InputT,MetricsT>

Type Parameters:

InputT - the type of the worker's inputs

MetricsT - the type of the worker's metrics

All Implemented Interfaces:

Measureable<MetricsT>, ConsumerWorkerFactory<InputT,MetricsT>

public class SingletonConsumerWorkerFactory<InputT,MetricsT>
extends Object
implements ConsumerWorkerFactory<InputT,MetricsT>

A ConsumerWorkerFactory that manages a singleton MeasuredConsumerWorker 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
SingletonConsumerWorkerFactory(MeasuredConsumerWorker<InputT,MetricsT> worker)

Method Summary

Modifier and Type	Method	Description
MetricsT	checkMetrics()	Non-destructive check of the metrics.
MetricsT	flushMetrics()	Destructive read of the metrics.
MeasuredConsumerWorker<InputT,MetricsT>	newConsumerWorker()

Methods inherited from class java.lang.Object

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

Constructor Details

SingletonConsumerWorkerFactory

public SingletonConsumerWorkerFactory(MeasuredConsumerWorker<InputT,MetricsT> worker)

Method Details

newConsumerWorker

public MeasuredConsumerWorker<InputT,MetricsT> newConsumerWorker()

Specified by:

newConsumerWorker in interface ConsumerWorkerFactory<InputT,MetricsT>

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<InputT>

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<InputT>

Returns:

the metrics