com.netflix.hystrix.metric.consumer

Class BucketedCounterStream<Event extends HystrixEvent,Bucket,Output>

java.lang.Object

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

Type Parameters:

Event - type of raw data that needs to get summarized into a bucket

Bucket - type of data contained in each bucket

Output - type of data emitted to stream subscribers (often is the same as A but does not have to be)

Direct Known Subclasses:

BucketedCumulativeCounterStream, BucketedRollingCounterStream

public abstract class BucketedCounterStream<Event extends HystrixEvent,Bucket,Output>
extends java.lang.Object

Abstract class that imposes a bucketing structure and provides streams of buckets

Field Summary

Fields

Modifier and Type	Field and Description
protected rx.Observable<Bucket>	bucketedStream
protected int	numBuckets
protected java.util.concurrent.atomic.AtomicReference<rx.Subscription>	subscription

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BucketedCounterStream(HystrixEventStream<Event> inputEventStream, int numBuckets, int bucketSizeInMs, rx.functions.Func2<Bucket,Event,Bucket> appendRawEventToBucket)

Method Summary

Methods

Modifier and Type	Method and Description
Output	getLatest() Synchronous call to retrieve the last calculated bucket without waiting for any emissions
abstract rx.Observable<Output>	observe() Return the stream of buckets
void	startCachingStreamValuesIfUnstarted()
void	unsubscribe()

Methods inherited from class java.lang.Object

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

Field Detail

numBuckets

protected final int numBuckets

bucketedStream

protected final rx.Observable<Bucket> bucketedStream

subscription

protected final java.util.concurrent.atomic.AtomicReference<rx.Subscription> subscription

Constructor Detail

BucketedCounterStream

protected BucketedCounterStream(HystrixEventStream<Event> inputEventStream,
                     int numBuckets,
                     int bucketSizeInMs,
                     rx.functions.Func2<Bucket,Event,Bucket> appendRawEventToBucket)

Method Detail

observe

public abstract rx.Observable<Output> observe()

Return the stream of buckets

Returns:

stream of buckets

startCachingStreamValuesIfUnstarted

public void startCachingStreamValuesIfUnstarted()

getLatest

public Output getLatest()

Synchronous call to retrieve the last calculated bucket without waiting for any emissions

Returns:

last calculated bucket

unsubscribe

public void unsubscribe()