org.apache.hadoop.metrics.spi
Class NullContext

java.lang.Object
  extended by org.apache.hadoop.metrics.spi.AbstractMetricsContext
      extended by org.apache.hadoop.metrics.spi.NullContext
All Implemented Interfaces:
org.apache.hadoop.metrics.MetricsContext

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

Null metrics context: a metrics context which does nothing. Used as the default context, so that no performance data is emitted if no configuration data is found.


Field Summary
 
Fields inherited from interface org.apache.hadoop.metrics.MetricsContext
DEFAULT_PERIOD
 
Constructor Summary
NullContext()
          Creates a new instance of NullContext
 
Method Summary
 
Methods inherited from class org.apache.hadoop.metrics.spi.AbstractMetricsContext
close, createRecord, flush, getAllRecords, getAttribute, getAttributeTable, getContextFactory, getContextName, getPeriod, init, isMonitoring, newRecord, parseAndSetPeriod, registerUpdater, setPeriod, stopMonitoring, unregisterUpdater
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NullContext

@InterfaceAudience.Private
public NullContext()
Creates a new instance of NullContext



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