org.drools.persistence.jpa
Class OptimisticLockRetryInterceptor

java.lang.Object
  org.drools.core.command.impl.AbstractInterceptor
      org.drools.persistence.jpa.OptimisticLockRetryInterceptor

All Implemented Interfaces:

org.drools.core.command.CommandService, org.drools.core.command.Interceptor, org.kie.api.runtime.CommandExecutor

public class OptimisticLockRetryInterceptor
extends org.drools.core.command.impl.AbstractInterceptor

Interceptor that is capable of retrying command execution. It is intended to retry only if right exception has been thrown. By default it will look for org.hibernate.StaleObjectStateException and only then attempt to retry. Since this is Hibernate specific class another can be given as system property to override default. Name of the system property org.kie.optlock.exclass and its value should be fully qualified class name of the exception that indicates OptimisticLocking. By default it will:

• Retry 3 times
• First retry will be attempted after 50 milliseconds
• next retries will be calculated as last sleep time multiplied by a factor (default factor is 4)

In case all retries failed origin exception will be thrown.

Field Summary

protected Class<?>

targetExceptionClass

Constructor Summary

OptimisticLockRetryInterceptor()

Method Summary

<T> T	execute(org.kie.api.command.Command<T> command)
long	getDelay()
long	getDelayFactor()
int	getRetries()
Class<?>	getTargetExceptionClass()
protected boolean	isCausedByOptimisticLockingFailure(Throwable throwable)
void	setDelay(long delay)
void	setDelayFactor(long delayFactor)
void	setRetries(int retries)
void	setTargetExceptionClass(Class<?> targetExceptionClass)

Methods inherited from class org.drools.core.command.impl.AbstractInterceptor

executeNext, getContext, getNext, setNext

Methods inherited from class java.lang.Object

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

Field Detail

targetExceptionClass

protected Class<?> targetExceptionClass

Constructor Detail

OptimisticLockRetryInterceptor

public OptimisticLockRetryInterceptor()

Method Detail

execute

public <T> T execute(org.kie.api.command.Command<T> command)

isCausedByOptimisticLockingFailure

protected boolean isCausedByOptimisticLockingFailure(Throwable throwable)

getRetries

public int getRetries()

setRetries

public void setRetries(int retries)

getDelay

public long getDelay()

setDelay

public void setDelay(long delay)

getDelayFactor

public long getDelayFactor()

setDelayFactor

public void setDelayFactor(long delayFactor)

getTargetExceptionClass

public Class<?> getTargetExceptionClass()

setTargetExceptionClass

public void setTargetExceptionClass(Class<?> targetExceptionClass)