org.apache.activemq.broker.region.policy

Class AbortSlowConsumerStrategy

java.lang.Object

org.apache.activemq.broker.region.policy.AbortSlowConsumerStrategy

All Implemented Interfaces:

java.lang.Runnable, SlowConsumerStrategy

Direct Known Subclasses:

AbortSlowAckConsumerStrategy

public class AbortSlowConsumerStrategy
extends java.lang.Object
implements SlowConsumerStrategy, java.lang.Runnable

Abort slow consumers when they reach the configured threshold of slowness, default is slow for 30 seconds

Field Summary

Fields

Modifier and Type	Field and Description
protected Broker	broker
protected java.lang.String	name
protected Scheduler	scheduler
protected java.util.Map<Subscription,SlowConsumerEntry>	slowConsumers
protected java.util.concurrent.atomic.AtomicBoolean	taskStarted

Constructor Summary

Constructors

Constructor and Description
AbortSlowConsumerStrategy()

Method Summary

Methods

Modifier and Type	Method and Description
void	abortConsumer(Subscription sub, boolean abortSubscriberConnection)
protected void	abortSubscription(java.util.Map<Subscription,SlowConsumerEntry> toAbort, boolean abortSubscriberConnection)
void	addDestination(Destination destination) For Strategies that need to examine assigned destination for slow consumers periodically the destination is assigned here.
long	getCheckPeriod()
long	getMaxSlowCount()
long	getMaxSlowDuration()
java.lang.String	getName()
java.util.Map<Subscription,SlowConsumerEntry>	getSlowConsumers()
boolean	isAbortConnection()
void	run()
void	setAbortConnection(boolean abortConnection) abort the consumers connection rather than sending a stop command to the remote consumer
void	setBrokerService(Broker broker) Sets the Broker instance which can provide a Scheduler among other things.
void	setCheckPeriod(long checkPeriod) time in milliseconds between checks for slow subscriptions
void	setMaxSlowCount(long maxSlowCount) number of times a subscription can be deemed slow before triggering abort effect depends on dispatch rate as slow determination is done on dispatch
void	setMaxSlowDuration(long maxSlowDuration) time in milliseconds that a sub can remain slow before triggering an abort.
void	setName(java.lang.String name)
void	slowConsumer(ConnectionContext context, Subscription subs) Slow consumer event.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected java.lang.String name

scheduler

protected Scheduler scheduler

broker

protected Broker broker

taskStarted

protected final java.util.concurrent.atomic.AtomicBoolean taskStarted

slowConsumers

protected final java.util.Map<Subscription,SlowConsumerEntry> slowConsumers

Constructor Detail

AbortSlowConsumerStrategy

public AbortSlowConsumerStrategy()

Method Detail

setBrokerService

public void setBrokerService(Broker broker)

Description copied from interface: SlowConsumerStrategy

Sets the Broker instance which can provide a Scheduler among other things.

Specified by:

setBrokerService in interface SlowConsumerStrategy

Parameters:

broker - The running Broker.

slowConsumer

public void slowConsumer(ConnectionContext context,
                Subscription subs)

Description copied from interface: SlowConsumerStrategy

Slow consumer event.

Specified by:

slowConsumer in interface SlowConsumerStrategy

Parameters:

context - Connection context of the subscription.

subs - The subscription object for the slow consumer.

run

public void run()

Specified by:

run in interface java.lang.Runnable

abortSubscription

protected void abortSubscription(java.util.Map<Subscription,SlowConsumerEntry> toAbort,
                     boolean abortSubscriberConnection)

abortConsumer

public void abortConsumer(Subscription sub,
                 boolean abortSubscriberConnection)

getMaxSlowCount

public long getMaxSlowCount()

setMaxSlowCount

public void setMaxSlowCount(long maxSlowCount)

number of times a subscription can be deemed slow before triggering abort effect depends on dispatch rate as slow determination is done on dispatch

getMaxSlowDuration

public long getMaxSlowDuration()

setMaxSlowDuration

public void setMaxSlowDuration(long maxSlowDuration)

time in milliseconds that a sub can remain slow before triggering an abort.

Parameters:

maxSlowDuration -

getCheckPeriod

public long getCheckPeriod()

setCheckPeriod

public void setCheckPeriod(long checkPeriod)

time in milliseconds between checks for slow subscriptions

Parameters:

checkPeriod -

isAbortConnection

public boolean isAbortConnection()

setAbortConnection

public void setAbortConnection(boolean abortConnection)

abort the consumers connection rather than sending a stop command to the remote consumer

Parameters:

abortConnection -

setName

public void setName(java.lang.String name)

getName

public java.lang.String getName()

getSlowConsumers

public java.util.Map<Subscription,SlowConsumerEntry> getSlowConsumers()

addDestination

public void addDestination(Destination destination)

Description copied from interface: SlowConsumerStrategy

For Strategies that need to examine assigned destination for slow consumers periodically the destination is assigned here. If the strategy doesn't is event driven it can just ignore assigned destination.

Specified by:

addDestination in interface SlowConsumerStrategy

Parameters:

destination - A destination to add to a watch list.