backtype.storm.utils
Class DisruptorQueue

java.lang.Object
  backtype.storm.utils.DisruptorQueue

All Implemented Interfaces:

IStatefulObject

public class DisruptorQueue
extends Object
implements IStatefulObject

A single consumer queue that uses the LMAX Disruptor. They key to the performance is the ability to catch up to the producer by processing tuples in batches.

Nested Class Summary

static class

DisruptorQueue.ObjectEventFactory

Constructor Summary

DisruptorQueue(String queueName, com.lmax.disruptor.ClaimStrategy claim, com.lmax.disruptor.WaitStrategy wait)

Method Summary

long	capacity()
void	consumeBatch(com.lmax.disruptor.EventHandler<Object> handler)
void	consumeBatchWhenAvailable(com.lmax.disruptor.EventHandler<Object> handler)
void	consumerStarted()
String	getName()
Object	getState()
void	haltWithInterrupt()
float	pctFull()
long	population()
void	publish(Object obj)
void	publish(Object obj, boolean block)
long	readPos()
void	tryPublish(Object obj)
long	writePos()

Methods inherited from class java.lang.Object

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

Constructor Detail

DisruptorQueue

public DisruptorQueue(String queueName,
                      com.lmax.disruptor.ClaimStrategy claim,
                      com.lmax.disruptor.WaitStrategy wait)

Method Detail

getName

public String getName()

consumeBatch

public void consumeBatch(com.lmax.disruptor.EventHandler<Object> handler)

haltWithInterrupt

public void haltWithInterrupt()

consumeBatchWhenAvailable

public void consumeBatchWhenAvailable(com.lmax.disruptor.EventHandler<Object> handler)

publish

public void publish(Object obj)

tryPublish

public void tryPublish(Object obj)
                throws com.lmax.disruptor.InsufficientCapacityException

Throws:

com.lmax.disruptor.InsufficientCapacityException

publish

public void publish(Object obj,
                    boolean block)
             throws com.lmax.disruptor.InsufficientCapacityException

Throws:

com.lmax.disruptor.InsufficientCapacityException

consumerStarted

public void consumerStarted()

population

public long population()

capacity

public long capacity()

writePos

public long writePos()

readPos

public long readPos()

pctFull

public float pctFull()

getState

public Object getState()

Specified by:

getState in interface IStatefulObject