org.apache.hadoop.metrics.spi

Class NoEmitMetricsContext

java.lang.Object

org.apache.hadoop.metrics.spi.AbstractMetricsContext

org.apache.hadoop.metrics.spi.NoEmitMetricsContext

All Implemented Interfaces:

org.apache.hadoop.metrics.MetricsContext

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class NoEmitMetricsContext
extends AbstractMetricsContext

A MetricsContext that does not emit data, but, unlike NullContextWithUpdate, does save it for retrieval with getAllRecords(). This is useful if you want to support MetricsServlet, but not emit metrics in any other way.

Field Summary

Fields inherited from interface org.apache.hadoop.metrics.MetricsContext

DEFAULT_PERIOD

Constructor Summary

Constructors

Constructor and Description
NoEmitMetricsContext() Creates a new instance of NullContextWithUpdateThread

Method Summary

Methods inherited from class org.apache.hadoop.metrics.spi.AbstractMetricsContext

close, createRecord, flush, getAllRecords, getAttribute, getAttributeTable, getContextFactory, getContextName, getPeriod, isMonitoring, newRecord, parseAndSetPeriod, registerUpdater, remove, setPeriod, startMonitoring, stopMonitoring, unregisterUpdater, update

Methods inherited from class java.lang.Object

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

Constructor Detail

NoEmitMetricsContext

@InterfaceAudience.Private
public NoEmitMetricsContext()

Creates a new instance of NullContextWithUpdateThread