com.netflix.hystrix.metric.consumer

Class RollingDistributionStream<Event extends HystrixEvent>

java.lang.Object

com.netflix.hystrix.metric.consumer.RollingDistributionStream<Event>

Direct Known Subclasses:

RollingCollapserBatchSizeDistributionStream, RollingCommandLatencyDistributionStream, RollingCommandUserLatencyDistributionStream

public class RollingDistributionStream<Event extends HystrixEvent>
extends java.lang.Object

Maintains a stream of distributions for a given Command. There is a rolling window abstraction on this stream. The latency distribution object is calculated over a window of t1 milliseconds. This window has b buckets. Therefore, a new set of counters is produced every t2 (=t1/b) milliseconds t1 = metricsRollingPercentileWindowInMilliseconds() b = metricsRollingPercentileBucketSize() These values are stable - there's no peeking into a bucket until it is emitted These values get produced and cached in this class.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RollingDistributionStream(HystrixEventStream<Event> stream, int numBuckets, int bucketSizeInMs, rx.functions.Func2<org.HdrHistogram.Histogram,Event,org.HdrHistogram.Histogram> addValuesToBucket)

Method Summary

Methods

Modifier and Type	Method and Description
int	getLatestMean()
int	getLatestPercentile(double percentile)
rx.Observable<CachedValuesHistogram>	observe()
void	startCachingStreamValuesIfUnstarted()
void	unsubscribe()

Methods inherited from class java.lang.Object

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

Constructor Detail

RollingDistributionStream

protected RollingDistributionStream(HystrixEventStream<Event> stream,
                         int numBuckets,
                         int bucketSizeInMs,
                         rx.functions.Func2<org.HdrHistogram.Histogram,Event,org.HdrHistogram.Histogram> addValuesToBucket)

Method Detail

observe

public rx.Observable<CachedValuesHistogram> observe()

getLatestMean

public int getLatestMean()

getLatestPercentile

public int getLatestPercentile(double percentile)

startCachingStreamValuesIfUnstarted

public void startCachingStreamValuesIfUnstarted()

unsubscribe

public void unsubscribe()