Class SingletonProcessorWorkerFactory<InputT,OutputT,MetricsT>

java.lang.Object

io.aleph0.yap.core.worker.SingletonProcessorWorkerFactory<InputT,OutputT,MetricsT>

Type Parameters:

InputT - the type of the worker's input

OutputT - the type of the worker's output

MetricsT - the type of the worker's metrics

All Implemented Interfaces:

Measureable<MetricsT>, ProcessorWorkerFactory<InputT,OutputT,MetricsT>

public class SingletonProcessorWorkerFactory<InputT,OutputT,MetricsT>
extends Object
implements ProcessorWorkerFactory<InputT,OutputT,MetricsT>

A ProcessorWorkerFactory that manages a singleton MeasuredProcessorWorker 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
SingletonProcessorWorkerFactory(MeasuredProcessorWorker<InputT,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.
MeasuredProcessorWorker<InputT,OutputT,MetricsT>	newProcessorWorker()	Creates a new worker

Methods inherited from class java.lang.Object

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

Constructor Details

SingletonProcessorWorkerFactory

public SingletonProcessorWorkerFactory(MeasuredProcessorWorker<InputT,OutputT,MetricsT> worker)

Method Details

newProcessorWorker

public MeasuredProcessorWorker<InputT,OutputT,MetricsT> newProcessorWorker()

Description copied from interface: ProcessorWorkerFactory

Creates a new worker

Specified by:

newProcessorWorker in interface ProcessorWorkerFactory<InputT,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<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