org.springframework.batch.repeat.callback
Class NestedRepeatCallback

java.lang.Object
  org.springframework.batch.repeat.callback.NestedRepeatCallback

All Implemented Interfaces:

RepeatCallback

public class NestedRepeatCallback
extends Object
implements RepeatCallback

Callback that delegates to another callback, via a RepeatOperations instance. Useful when nesting or composing batches in one another, e.g. for breaking a batch down into chunks.

Author:

Dave Syer

Constructor Summary

NestedRepeatCallback(RepeatOperations template, RepeatCallback callback)
Constructor setting mandatory fields.

Method Summary

RepeatStatus

doInIteration(RepeatContext context) Simply calls template.execute(callback).

Methods inherited from class java.lang.Object

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

Constructor Detail

NestedRepeatCallback

public NestedRepeatCallback(RepeatOperations template,
                            RepeatCallback callback)

Constructor setting mandatory fields.

Parameters:

template - the RepeatOperations to use when calling the delegate callback

callback - the RepeatCallback delegate

Method Detail

doInIteration

public RepeatStatus doInIteration(RepeatContext context)
                           throws Exception

Simply calls template.execute(callback). Clients can use this to repeat a batch process, or to break a process up into smaller chunks (e.g. to change the transaction boundaries).

Specified by:

doInIteration in interface RepeatCallback

Parameters:

context - the current context passed in by the caller.

Returns:

an RepeatStatus which is continuable if there is (or may be) more data to process.

Throws:

Exception - if there is a problem with the processing.

See Also:

RepeatCallback.doInIteration(RepeatContext)