com.netflix.hystrix.metric.consumer

Class RollingThreadPoolEventCounterStream

java.lang.Object

com.netflix.hystrix.metric.consumer.BucketedCounterStream<Event,Bucket,Output>

com.netflix.hystrix.metric.consumer.BucketedRollingCounterStream<HystrixCommandCompletion,long[],long[]>

com.netflix.hystrix.metric.consumer.RollingThreadPoolEventCounterStream

public class RollingThreadPoolEventCounterStream
extends BucketedRollingCounterStream<HystrixCommandCompletion,long[],long[]>

Maintains a stream of event counters for a given ThreadPool. There is a rolling window abstraction on this stream. The event counters 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 = HystrixThreadPoolProperties.metricsRollingStatisticalWindowInMilliseconds() b = HystrixThreadPoolProperties.metricsRollingStatisticalWindowBuckets() These values are stable - there's no peeking into a bucket until it is emitted These values get produced and cached in this class. You may query to find the latest rolling count of 2 events (executed/rejected) via RollingThreadPoolEventCounterStream.getLatestCount(com.netflix.hystrix.HystrixEventType.ThreadPool).

Field Summary

Fields inherited from class com.netflix.hystrix.metric.consumer.BucketedCounterStream

bucketedStream, numBuckets, subscription

Method Summary

Methods

Modifier and Type	Method and Description
long[]	getEmptyBucketSummary()
long[]	getEmptyOutputValue()
static RollingThreadPoolEventCounterStream	getInstance(HystrixThreadPoolKey threadPoolKey, HystrixThreadPoolProperties properties)
static RollingThreadPoolEventCounterStream	getInstance(HystrixThreadPoolKey threadPoolKey, int numBuckets, int bucketSizeInMs)
long	getLatestCount(HystrixEventType.ThreadPool eventType)
static void	reset()

Methods inherited from class com.netflix.hystrix.metric.consumer.BucketedRollingCounterStream

observe

Methods inherited from class com.netflix.hystrix.metric.consumer.BucketedCounterStream

getLatest, startCachingStreamValuesIfUnstarted, unsubscribe

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static RollingThreadPoolEventCounterStream getInstance(HystrixThreadPoolKey threadPoolKey,
                                              HystrixThreadPoolProperties properties)

getInstance

public static RollingThreadPoolEventCounterStream getInstance(HystrixThreadPoolKey threadPoolKey,
                                              int numBuckets,
                                              int bucketSizeInMs)

reset

public static void reset()

getEmptyBucketSummary

public long[] getEmptyBucketSummary()

getEmptyOutputValue

public long[] getEmptyOutputValue()

getLatestCount

public long getLatestCount(HystrixEventType.ThreadPool eventType)