org.drools.persistence.jpa

Class OptimisticLockRetryInterceptor

java.lang.Object

org.drools.core.fluent.impl.PseudoClockRunner

org.drools.core.command.impl.AbstractInterceptor

org.drools.persistence.jpa.OptimisticLockRetryInterceptor

All Implemented Interfaces:

org.drools.core.runtime.ChainableRunner, org.drools.core.runtime.InternalLocalRunner, org.kie.api.runtime.CommandExecutor, org.kie.api.runtime.ExecutableRunner<org.kie.api.runtime.RequestContext>

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

ExecutableInterceptor 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.

Nested Class Summary

Nested classes/interfaces inherited from interface org.drools.core.runtime.InternalLocalRunner

org.drools.core.runtime.InternalLocalRunner.SingleBatchExecutable, org.drools.core.runtime.InternalLocalRunner.SingleCommandExecutable

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<?>	targetConstraintViolationExceptionClass
protected Class<?>	targetExceptionClass

Constructor Summary

Constructors

Constructor and Description
OptimisticLockRetryInterceptor()

Method Summary

Modifier and Type	Method and Description
org.kie.api.runtime.RequestContext	execute(org.kie.api.runtime.Executable executable, org.kie.api.runtime.RequestContext ctx)
long	getDelay()
long	getDelayFactor()
int	getRetries()
Class<?>	getTargetExceptionClass()
protected boolean	hasInterceptorInStack()
protected org.kie.api.runtime.RequestContext	internalExecute(org.kie.api.runtime.Executable executable, org.kie.api.runtime.RequestContext ctx)
protected boolean	isCausedByConstraintViolationFailure(Throwable throwable)
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, getNext, setNext

Methods inherited from class org.drools.core.fluent.impl.PseudoClockRunner

createContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.core.runtime.InternalLocalRunner

execute, execute, execute

Methods inherited from interface org.kie.api.runtime.ExecutableRunner

create, create, createContext

Field Detail

targetExceptionClass

protected Class<?> targetExceptionClass

targetConstraintViolationExceptionClass

protected Class<?> targetConstraintViolationExceptionClass

Constructor Detail

OptimisticLockRetryInterceptor

public OptimisticLockRetryInterceptor()

Method Detail

execute

public final org.kie.api.runtime.RequestContext execute(org.kie.api.runtime.Executable executable,
                                                        org.kie.api.runtime.RequestContext ctx)

Specified by:

execute in interface org.kie.api.runtime.ExecutableRunner<org.kie.api.runtime.RequestContext>

Overrides:

execute in class org.drools.core.fluent.impl.PseudoClockRunner

internalExecute

protected org.kie.api.runtime.RequestContext internalExecute(org.kie.api.runtime.Executable executable,
                                                             org.kie.api.runtime.RequestContext ctx)

isCausedByOptimisticLockingFailure

protected boolean isCausedByOptimisticLockingFailure(Throwable throwable)

isCausedByConstraintViolationFailure

protected boolean isCausedByConstraintViolationFailure(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)

hasInterceptorInStack

protected boolean hasInterceptorInStack()