com.netflix.hystrix.metric.consumer

Class RollingCommandEventCounterStream

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.RollingCommandEventCounterStream

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

Maintains a stream of event counters for a given Command. 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 = HystrixCommandProperties.metricsRollingStatisticalWindowInMilliseconds() b = HystrixCommandProperties.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. This value (the latest observed value) may be queried using RollingCommandEventCounterStream.getLatest(HystrixEventType).

Field Summary

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

bucketedStream, numBuckets, subscription

Method Summary

Methods

Modifier and Type	Method and Description
static RollingCommandEventCounterStream	getInstance(HystrixCommandKey commandKey, HystrixCommandProperties properties)
static RollingCommandEventCounterStream	getInstance(HystrixCommandKey commandKey, int numBuckets, int bucketSizeInMs)
long	getLatest(HystrixEventType 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 RollingCommandEventCounterStream getInstance(HystrixCommandKey commandKey,
                                           HystrixCommandProperties properties)

getInstance

public static RollingCommandEventCounterStream getInstance(HystrixCommandKey commandKey,
                                           int numBuckets,
                                           int bucketSizeInMs)

reset

public static void reset()

getLatest

public long getLatest(HystrixEventType eventType)