Class DefaultConsumerWorkerFactory<InputT,MetricsT>

java.lang.Object

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

Type Parameters:

InputT - the type of the input

MetricsT - the type of the metrics

All Implemented Interfaces:

Measureable<MetricsT>, ConsumerWorkerFactory<InputT,MetricsT>

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

A ConsumerWorkerFactory that creates and manages multiple MeasuredConsumerWorkers and tracks their metrics.

This factory uses a BinaryOperator to aggregate the metrics of all active workers. If there are no active workers, the metrics will be null. If there is one active worker, the metrics will be the metrics of that worker. If there are multiple active workers, the metrics will be the result of applying the BinaryOperator to the metrics of all active workers.

Constructor Summary

Constructors

Constructor	Description
DefaultConsumerWorkerFactory(MeasuredConsumerWorker<InputT,MetricsT> workerSupplier, BinaryOperator<MetricsT> metricsAggregator)

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

DefaultConsumerWorkerFactory

public DefaultConsumerWorkerFactory(MeasuredConsumerWorker<InputT,MetricsT> workerSupplier,
 BinaryOperator<MetricsT> metricsAggregator)

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