Package org.apache.hadoop.hdfs.server.federation.metrics

Class NullStateStoreMetrics

java.lang.Object

org.apache.hadoop.hdfs.server.federation.metrics.StateStoreMetrics

org.apache.hadoop.hdfs.server.federation.metrics.NullStateStoreMetrics

All Implemented Interfaces:

StateStoreMBean

public class NullStateStoreMetrics
extends StateStoreMetrics

Implementation of the State Store metrics which does not do anything. This is used when the metrics are disabled (e.g., tests).

Constructor Summary

Constructors

Constructor	Description
NullStateStoreMetrics()

Method Summary

Modifier and Type	Method	Description
void	addFailure(long latency)
void	addRead(long latency)
void	addRemove(long latency)
void	addWrite(long latency)
double	getFailureAvg()
long	getFailureOps()
double	getReadAvg()
long	getReadOps()
double	getRemoveAvg()
long	getRemoveOps()
double	getWriteAvg()
long	getWriteOps()
void	reset()
void	setCacheSize(java.lang.String name, int size)	Set the size of the cache for a State Store interface.
void	shutdown()

Methods inherited from class org.apache.hadoop.hdfs.server.federation.metrics.StateStoreMetrics

create, getCacheLoadMetrics, setCacheLoading, setLocationCache

Methods inherited from class java.lang.Object

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

Constructor Detail

NullStateStoreMetrics

public NullStateStoreMetrics()

Method Detail

addRead

public void addRead(long latency)

Overrides:

addRead in class StateStoreMetrics

getReadOps

public long getReadOps()

Specified by:

getReadOps in interface StateStoreMBean

Overrides:

getReadOps in class StateStoreMetrics

getReadAvg

public double getReadAvg()

Specified by:

getReadAvg in interface StateStoreMBean

Overrides:

getReadAvg in class StateStoreMetrics

addWrite

public void addWrite(long latency)

Overrides:

addWrite in class StateStoreMetrics

getWriteOps

public long getWriteOps()

Specified by:

getWriteOps in interface StateStoreMBean

Overrides:

getWriteOps in class StateStoreMetrics

getWriteAvg

public double getWriteAvg()

Specified by:

getWriteAvg in interface StateStoreMBean

Overrides:

getWriteAvg in class StateStoreMetrics

addFailure

public void addFailure(long latency)

Overrides:

addFailure in class StateStoreMetrics

getFailureOps

public long getFailureOps()

Specified by:

getFailureOps in interface StateStoreMBean

Overrides:

getFailureOps in class StateStoreMetrics

getFailureAvg

public double getFailureAvg()

Specified by:

getFailureAvg in interface StateStoreMBean

Overrides:

getFailureAvg in class StateStoreMetrics

addRemove

public void addRemove(long latency)

Overrides:

addRemove in class StateStoreMetrics

getRemoveOps

public long getRemoveOps()

Specified by:

getRemoveOps in interface StateStoreMBean

Overrides:

getRemoveOps in class StateStoreMetrics

getRemoveAvg

public double getRemoveAvg()

Specified by:

getRemoveAvg in interface StateStoreMBean

Overrides:

getRemoveAvg in class StateStoreMetrics

setCacheSize

public void setCacheSize(java.lang.String name,
                         int size)

Description copied from class: StateStoreMetrics

Set the size of the cache for a State Store interface.

Overrides:

setCacheSize in class StateStoreMetrics

Parameters:

name - Name of the record to cache.

size - Number of records.

reset

public void reset()

Overrides:

reset in class StateStoreMetrics

shutdown

public void shutdown()

Overrides:

shutdown in class StateStoreMetrics