ch.elca.el4j.services.exceptionhandler.handler
Class RoundRobinSwappableTargetExceptionHandler

java.lang.Object
  ch.elca.el4j.services.exceptionhandler.handler.AbstractExceptionHandler
      ch.elca.el4j.services.exceptionhandler.handler.AbstractRetryExceptionHandler
          ch.elca.el4j.services.exceptionhandler.handler.AbstractSwappableTargetExceptionHandler
              ch.elca.el4j.services.exceptionhandler.handler.RoundRobinSwappableTargetExceptionHandler

All Implemented Interfaces:

ExceptionHandler, InitializingBean

public class RoundRobinSwappableTargetExceptionHandler
extends AbstractSwappableTargetExceptionHandler
implements InitializingBean

This class implements a round robin strategy to swap a proxy's target. It even supports repairing targets that are not contained in the list of alternative targets.

Author:

Andreas Bur (ABU)

File-location:

RoundRobinSwappableTargetExceptionHandler

Last check-in date:

2009-08-04 15:35:01 +0200 (Di, 04. Aug 2009) by swismer for revision 3883

Constructor Summary

RoundRobinSwappableTargetExceptionHandler()

Method Summary

void	afterPropertiesSet()
protected Object	getNewTarget(Object current, Throwable t, org.aopalliance.intercept.MethodInvocation invocation, org.slf4j.Logger logger) Determines a new target to be used by the proxy.
void	setTargets(List targets) Sets the list of targets that are used one after the other if the current target doesn't work anymore.

Methods inherited from class ch.elca.el4j.services.exceptionhandler.handler.AbstractSwappableTargetExceptionHandler

retry, setSwapper

Methods inherited from class ch.elca.el4j.services.exceptionhandler.handler.AbstractRetryExceptionHandler

getRetries, handleException, setRetries

Methods inherited from class ch.elca.el4j.services.exceptionhandler.handler.AbstractExceptionHandler

getInvocationDescription, handleException, setUseDynamicLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

RoundRobinSwappableTargetExceptionHandler

public RoundRobinSwappableTargetExceptionHandler()

Method Detail

setTargets

public void setTargets(List targets)

Sets the list of targets that are used one after the other if the current target doesn't work anymore.

Parameters:

targets - The list of targets to set.

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception

getNewTarget

protected Object getNewTarget(Object current,
                              Throwable t,
                              org.aopalliance.intercept.MethodInvocation invocation,
                              org.slf4j.Logger logger)
                       throws Throwable

Determines a new target to be used by the proxy.

Specified by:

getNewTarget in class AbstractSwappableTargetExceptionHandler

Parameters:

current - The current target which the proxy is working on.

t - The exception that caused this strategy. Subclasses may distinguish between different exception types.

invocation - The original invocation that failed.

logger - The logger.

Returns:

Returns an alternative bean that implements the same interface as the original one.

Throws:

RetryException - Signals that the complete invocation has to be rerun.

Throwable - Whenever something goes wrong.