org.springframework.batch.retry.backoff
Class StatelessBackOffPolicy

java.lang.Object
  org.springframework.batch.retry.backoff.StatelessBackOffPolicy

All Implemented Interfaces:

BackOffPolicy

Direct Known Subclasses:

FixedBackOffPolicy, NoBackOffPolicy

public abstract class StatelessBackOffPolicy
extends Object
implements BackOffPolicy

Simple base class for BackOffPolicy implementations that maintain no state across invocations.

Author:

Rob Harrop, Dave Syer

Constructor Summary

StatelessBackOffPolicy()

Method Summary

void	backOff(BackOffContext backOffContext) Delegates directly to the doBackOff() method without passing on the BackOffContext argument which is not needed for stateless implementations.
protected abstract void	doBackOff() Sub-classes should implement this method to perform the actual back off.
BackOffContext	start(RetryContext status) Returns 'null'.

Methods inherited from class java.lang.Object

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

Constructor Detail

StatelessBackOffPolicy

public StatelessBackOffPolicy()

Method Detail

backOff

public final void backOff(BackOffContext backOffContext)
                   throws BackOffInterruptedException

Delegates directly to the doBackOff() method without passing on the BackOffContext argument which is not needed for stateless implementations.

Specified by:

backOff in interface BackOffPolicy

Throws:

BackOffInterruptedException - if the attempt at back off is interrupted.

start

public BackOffContext start(RetryContext status)

Returns 'null'. Subclasses can add behaviour, e.g. initial sleep before first attempt.

Specified by:

start in interface BackOffPolicy

Parameters:

status - the current retry context, which might contain information that we can use to decide how to proceed.

Returns:

the implementation-specific BackOffContext or 'null'.

doBackOff

protected abstract void doBackOff()
                           throws BackOffInterruptedException

Sub-classes should implement this method to perform the actual back off.

Throws:

BackOffInterruptedException