Package org.apache.storm.daemon.worker

Class BackPressureTracker

java.lang.Object

org.apache.storm.daemon.worker.BackPressureTracker

public class BackPressureTracker
extends Object

Tracks the BackPressure status.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BackPressureTracker.BackpressureState

Constructor Summary

Constructors

Constructor	Description
BackPressureTracker(String workerId, Map<Integer,JCQueue> localTasksToQueues, StormMetricRegistry metricRegistry, Map<Integer,String> taskToComponent)

Method Summary

Modifier and Type	Method	Description
BackPressureTracker.BackpressureState	getBackpressureState(Integer taskId)
BackPressureStatus	getCurrStatus()
int	getLastOverflowCount(BackPressureTracker.BackpressureState state)
boolean	recordBackPressure(BackPressureTracker.BackpressureState state)	Record BP for a task.
boolean	refreshBpTaskList()
void	setLastOverflowCount(BackPressureTracker.BackpressureState state, int value)

Methods inherited from class java.lang.Object

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

Constructor Detail

BackPressureTracker

public BackPressureTracker(String workerId,
                           Map<Integer,JCQueue> localTasksToQueues,
                           StormMetricRegistry metricRegistry,
                           Map<Integer,String> taskToComponent)

Method Detail

getBackpressureState

public BackPressureTracker.BackpressureState getBackpressureState(Integer taskId)

recordBackPressure

public boolean recordBackPressure(BackPressureTracker.BackpressureState state)

Record BP for a task.

This is called by transferLocalBatch() on NettyWorker thread

Returns:

true if an update was recorded, false if taskId is already under BP

refreshBpTaskList

public boolean refreshBpTaskList()

getCurrStatus

public BackPressureStatus getCurrStatus()

getLastOverflowCount

public int getLastOverflowCount(BackPressureTracker.BackpressureState state)

setLastOverflowCount

public void setLastOverflowCount(BackPressureTracker.BackpressureState state,
                                 int value)