io.engineblock.metrics

Class DeltaHdrHistogramReservoir

java.lang.Object

io.engineblock.metrics.DeltaHdrHistogramReservoir

All Implemented Interfaces:

com.codahale.metrics.Reservoir

@ThreadSafe
public final class DeltaHdrHistogramReservoir
extends Object
implements com.codahale.metrics.Reservoir

A custom wrapping of snapshotting logic on the HdrHistogram. This histogram will always report the last histogram since it was most recently asked for with the getDeltaSnapshot(...) method. This provides local snapshot timing, but with a consistent view for reporting channels about what those snapshots most recently looked like.

Constructor Summary

Constructors

Constructor and Description
DeltaHdrHistogramReservoir() Create a reservoir with a default recorder.
DeltaHdrHistogramReservoir(org.HdrHistogram.Recorder recorder) Create a reservoir with a user-specified recorder.

Method Summary

Modifier and Type	Method and Description
com.codahale.metrics.Snapshot	getLastSnapshot()
com.codahale.metrics.Snapshot	getSnapshot()
com.codahale.metrics.Snapshot	getTotalSnapshot() Get a histogram snapshot that spans the whole lifetime of this reservoir.
int	size()
void	update(long value)

Methods inherited from class java.lang.Object

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

Constructor Detail

DeltaHdrHistogramReservoir

public DeltaHdrHistogramReservoir()

Create a reservoir with a default recorder. This recorder should be suitable for most usage.

DeltaHdrHistogramReservoir

public DeltaHdrHistogramReservoir(org.HdrHistogram.Recorder recorder)

Create a reservoir with a user-specified recorder.

Parameters:

recorder - Recorder to use

Method Detail

size

public int size()

Specified by:

size in interface com.codahale.metrics.Reservoir

update

public void update(long value)

Specified by:

update in interface com.codahale.metrics.Reservoir

getSnapshot

public com.codahale.metrics.Snapshot getSnapshot()

Specified by:

getSnapshot in interface com.codahale.metrics.Reservoir

Returns:

the data accumulated since the reservoir was created, or since the last call to this method

getLastSnapshot

public com.codahale.metrics.Snapshot getLastSnapshot()

Returns:

last histogram snapshot that was provided by getSnapshot()

getTotalSnapshot

public com.codahale.metrics.Snapshot getTotalSnapshot()

Get a histogram snapshot that spans the whole lifetime of this reservoir.

Returns:

a histogram snapshot