AbortSlowConsumerStrategy (ActiveMQ

java.lang.Object
- org.apache.activemq.broker.region.policy.AbortSlowConsumerStrategy

All Implemented Interfaces:

Runnable, SlowConsumerStrategy

Direct Known Subclasses:

AbortSlowAckConsumerStrategy
```
public class AbortSlowConsumerStrategy
extends Object
implements SlowConsumerStrategy, 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 String`	`name`
`protected org.apache.activemq.thread.Scheduler`	`scheduler`
`protected Map<Subscription,SlowConsumerEntry>`	`slowConsumers`
`protected AtomicBoolean`	`taskStarted`

Constructor Summary

Constructors
Constructor and Description

AbortSlowConsumerStrategy()

Constructors
Constructor and Description
`AbortSlowConsumerStrategy()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`abortConsumer(Subscription sub, boolean abortSubscriberConnection)`
`protected void`	`abortSubscription(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()`
`String`	`getName()`
`Map<Subscription,SlowConsumerEntry>`	`getSlowConsumers()`
`boolean`	`isAbortConnection()`
`boolean`	`isIgnoreNetworkSubscriptions()` Returns whether the strategy is configured to ignore subscriptions that are from a network connection.
`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`	`setIgnoreNetworkConsumers(boolean ignoreNetworkConsumers)` Sets whether the strategy is configured to ignore consumers that are part of a network connection to another broker.
`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(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 String name
```
  - scheduler
```
protected org.apache.activemq.thread.Scheduler scheduler
```
  - broker
```
protected Broker broker
```
  - taskStarted
```
protected final AtomicBoolean taskStarted
```
  - slowConsumers
```
protected final 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 Runnable
  - abortSubscription
```
protected void abortSubscription(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 -
  - isIgnoreNetworkSubscriptions
```
public boolean isIgnoreNetworkSubscriptions()
```
    Returns whether the strategy is configured to ignore subscriptions that are from a network connection.
    
    Returns:
    
    true if the strategy will ignore network connection subscriptions when looking for slow consumers.
  - setIgnoreNetworkConsumers
```
public void setIgnoreNetworkConsumers(boolean ignoreNetworkConsumers)
```
    Sets whether the strategy is configured to ignore consumers that are part of a network connection to another broker. When configured to not ignore idle consumers this strategy acts not only on consumers that are actually slow but also on any consumer that has not received any messages for the maxTimeSinceLastAck. This allows for a way to evict idle consumers while also aborting slow consumers however for a network subscription this can create a lot of unnecessary churn and if the abort connection option is also enabled this can result in the entire network connection being torn down and rebuilt for no reason.
    
    Parameters:
    
    ignoreNetworkConsumers - Should this strategy ignore subscriptions made by a network connector.
  - setName
```
public void setName(String name)
```
  - getName
```
public String getName()
```
  - getSlowConsumers
```
public 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.

Class AbortSlowConsumerStrategy

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

name

scheduler

broker

taskStarted

slowConsumers

Constructor Detail

AbortSlowConsumerStrategy

Method Detail

setBrokerService

slowConsumer

run

abortSubscription

abortConsumer

getMaxSlowCount

setMaxSlowCount

getMaxSlowDuration

setMaxSlowDuration

getCheckPeriod

setCheckPeriod

isAbortConnection

setAbortConnection

isIgnoreNetworkSubscriptions

setIgnoreNetworkConsumers

setName

getName

getSlowConsumers

addDestination