org.apache.hadoop.fs.s3a.statistics.impl

Class EmptyS3AStatisticsContext

java.lang.Object

org.apache.hadoop.fs.s3a.statistics.impl.EmptyS3AStatisticsContext

All Implemented Interfaces:

CountersAndGauges, S3AStatisticsContext, org.apache.hadoop.fs.statistics.DurationTrackerFactory

public final class EmptyS3AStatisticsContext
extends Object
implements S3AStatisticsContext

Special statistics context, all of whose context operations are no-ops. All statistics instances it returns are also empty.

This class is here primarily to aid in testing, but it also allows for classes to require a non-empty statistics context in their constructor -yet still be instantiated without one bound to any filesystem.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	EmptyS3AStatisticsContext.EmptyMultipartUploaderStatistics Multipart Uploader.

Field Summary

Fields

Modifier and Type	Field and Description
static BlockOutputStreamStatistics	EMPTY_BLOCK_OUTPUT_STREAM_STATISTICS
static CommitterStatistics	EMPTY_COMMITTER_STATISTICS
static DelegationTokenStatistics	EMPTY_DELEGATION_TOKEN_STATISTICS
static S3AInputStreamStatistics	EMPTY_INPUT_STREAM_STATISTICS
static StatisticsFromAwsSdk	EMPTY_STATISTICS_FROM_AWS_SDK

Constructor Summary

Constructors

Constructor and Description
EmptyS3AStatisticsContext()

Method Summary

Modifier and Type	Method and Description
void	addValueToQuantiles(Statistic op, long value) Add a value to a quantiles statistic.
S3AMultipartUploaderStatistics	createMultipartUploaderStatistics() Creaet a multipart statistics collector.
void	decrementGauge(Statistic op, long count) Decrement a specific gauge.
void	incrementCounter(Statistic op, long count) Increment a specific counter.
void	incrementGauge(Statistic op, long count) Increment a specific gauge.
CommitterStatistics	newCommitterStatistics() Create a new instance of the committer statistics.
DelegationTokenStatistics	newDelegationTokenStatistics() Create a delegation token statistics instance.
S3AInputStreamStatistics	newInputStreamStatistics() Create a stream input statistics instance.
BlockOutputStreamStatistics	newOutputStreamStatistics() Create a stream output statistics instance.
StatisticsFromAwsSdk	newStatisticsFromAwsSdk() Create a StatisticsFromAwsSdk instance.
void	recordDuration(Statistic op, boolean success, Duration duration) Record a duration.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.fs.statistics.DurationTrackerFactory

trackDuration, trackDuration

Field Detail

EMPTY_INPUT_STREAM_STATISTICS

public static final S3AInputStreamStatistics EMPTY_INPUT_STREAM_STATISTICS

EMPTY_COMMITTER_STATISTICS

public static final CommitterStatistics EMPTY_COMMITTER_STATISTICS

EMPTY_BLOCK_OUTPUT_STREAM_STATISTICS

public static final BlockOutputStreamStatistics EMPTY_BLOCK_OUTPUT_STREAM_STATISTICS

EMPTY_DELEGATION_TOKEN_STATISTICS

public static final DelegationTokenStatistics EMPTY_DELEGATION_TOKEN_STATISTICS

EMPTY_STATISTICS_FROM_AWS_SDK

public static final StatisticsFromAwsSdk EMPTY_STATISTICS_FROM_AWS_SDK

Constructor Detail

EmptyS3AStatisticsContext

public EmptyS3AStatisticsContext()

Method Detail

newInputStreamStatistics

public S3AInputStreamStatistics newInputStreamStatistics()

Description copied from interface: S3AStatisticsContext

Create a stream input statistics instance.

Specified by:

newInputStreamStatistics in interface S3AStatisticsContext

Returns:

the new instance

newCommitterStatistics

public CommitterStatistics newCommitterStatistics()

Description copied from interface: S3AStatisticsContext

Create a new instance of the committer statistics.

Specified by:

newCommitterStatistics in interface S3AStatisticsContext

Returns:

a new committer statistics instance

newOutputStreamStatistics

public BlockOutputStreamStatistics newOutputStreamStatistics()

Description copied from interface: S3AStatisticsContext

Create a stream output statistics instance.

Specified by:

newOutputStreamStatistics in interface S3AStatisticsContext

Returns:

the new instance

newDelegationTokenStatistics

public DelegationTokenStatistics newDelegationTokenStatistics()

Description copied from interface: S3AStatisticsContext

Create a delegation token statistics instance.

Specified by:

newDelegationTokenStatistics in interface S3AStatisticsContext

Returns:

an instance of delegation token statistics

newStatisticsFromAwsSdk

public StatisticsFromAwsSdk newStatisticsFromAwsSdk()

Description copied from interface: S3AStatisticsContext

Create a StatisticsFromAwsSdk instance.

Specified by:

newStatisticsFromAwsSdk in interface S3AStatisticsContext

Returns:

an instance of StatisticsFromAwsSdk

createMultipartUploaderStatistics

public S3AMultipartUploaderStatistics createMultipartUploaderStatistics()

Description copied from interface: S3AStatisticsContext

Creaet a multipart statistics collector.

Specified by:

createMultipartUploaderStatistics in interface S3AStatisticsContext

Returns:

an instance

incrementCounter

public void incrementCounter(Statistic op,
                             long count)

Description copied from interface: CountersAndGauges

Increment a specific counter. No-op if not defined.

Specified by:

incrementCounter in interface CountersAndGauges

Parameters:

op - operation

count - increment value

incrementGauge

public void incrementGauge(Statistic op,
                           long count)

Description copied from interface: CountersAndGauges

Increment a specific gauge. No-op if not defined.

Specified by:

incrementGauge in interface CountersAndGauges

Parameters:

op - operation

count - increment value

decrementGauge

public void decrementGauge(Statistic op,
                           long count)

Description copied from interface: CountersAndGauges

Decrement a specific gauge. No-op if not defined.

Specified by:

decrementGauge in interface CountersAndGauges

Parameters:

op - operation

count - increment value

addValueToQuantiles

public void addValueToQuantiles(Statistic op,
                                long value)

Description copied from interface: CountersAndGauges

Add a value to a quantiles statistic. No-op if the quantile isn't found.

Specified by:

addValueToQuantiles in interface CountersAndGauges

Parameters:

op - operation to look up.

value - value to add.

recordDuration

public void recordDuration(Statistic op,
                           boolean success,
                           Duration duration)

Description copied from interface: CountersAndGauges

Record a duration.

Specified by:

recordDuration in interface CountersAndGauges

Parameters:

op - operation

success - was the operation a success?

duration - how long did it take