com.netflix.hystrix.metric.consumer

Class CumulativeCommandEventCounterStream

java.lang.Object

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

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

com.netflix.hystrix.metric.consumer.CumulativeCommandEventCounterStream

public class CumulativeCommandEventCounterStream
extends BucketedCumulativeCounterStream<HystrixCommandCompletion,long[],long[]>

Maintains a stream of event counters for a given Command. There is no rolling window abstraction on this stream - every event since the start of the JVM is kept track of. The event counters object is calculated on the same schedule as the rolling abstract RollingCommandEventCounterStream, so bucket rolls correspond to new data in this stream, though data never goes out of window in this stream. 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 CumulativeCommandEventCounterStream.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 CumulativeCommandEventCounterStream	getInstance(HystrixCommandKey commandKey, HystrixCommandProperties properties)
static CumulativeCommandEventCounterStream	getInstance(HystrixCommandKey commandKey, int numBuckets, int bucketSizeInMs)
long	getLatest(HystrixEventType eventType)
static void	reset()

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

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 CumulativeCommandEventCounterStream getInstance(HystrixCommandKey commandKey,
                                              HystrixCommandProperties properties)

getInstance

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

reset

public static void reset()

getLatest

public long getLatest(HystrixEventType eventType)