Package org.springframework.batch.core.step.tasklet

Class MethodInvokingTaskletAdapter

java.lang.Object

org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator<Object>

org.springframework.batch.core.step.tasklet.MethodInvokingTaskletAdapter

All Implemented Interfaces:

Tasklet, org.springframework.beans.factory.InitializingBean

public class MethodInvokingTaskletAdapter
extends AbstractMethodInvokingDelegator<Object>
implements Tasklet

A Tasklet that wraps a method in a POJO. By default the return value is ExitStatus.COMPLETED unless the delegate POJO itself returns an ExitStatus. The POJO method is usually going to have no arguments, but a static argument or array of arguments can be used by setting the arguments property.

Author:

Dave Syer, Mahmoud Ben Hassine

See Also:

• AbstractMethodInvokingDelegator

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator

AbstractMethodInvokingDelegator.InvocationTargetThrowableWrapper

Constructor Summary

Constructors

Constructor	Description
MethodInvokingTaskletAdapter()

Method Summary

Modifier and Type	Method	Description
RepeatStatus	execute(StepContribution contribution, ChunkContext chunkContext)	Delegate execution to the target object and translate the return value to an ExitStatus by invoking a method in the delegate POJO.
protected ExitStatus	mapResult(Object result)	If the result is an ExitStatus already just return that, otherwise return ExitStatus.COMPLETED.

Methods inherited from class org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator

afterPropertiesSet, getArguments, getTargetMethod, getTargetObject, invokeDelegateMethod, invokeDelegateMethodWithArgument, invokeDelegateMethodWithArguments, setArguments, setTargetMethod, setTargetObject

Methods inherited from class java.lang.Object

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

Constructor Details

MethodInvokingTaskletAdapter

public MethodInvokingTaskletAdapter()

Method Details

execute

@Nullable
public RepeatStatus execute(StepContribution contribution,
 ChunkContext chunkContext)
                     throws Exception

Delegate execution to the target object and translate the return value to an ExitStatus by invoking a method in the delegate POJO. Ignores the StepContribution and the attributes.

Specified by:

execute in interface Tasklet

Parameters:

contribution - mutable state to be passed back to update the current step execution

chunkContext - attributes shared between invocations but not between restarts

Returns:

an RepeatStatus indicating whether processing is continuable. Returning null is interpreted as RepeatStatus.FINISHED

Throws:

Exception - thrown if error occurs during execution.

See Also:

• Tasklet.execute(StepContribution, ChunkContext)

mapResult

protected ExitStatus mapResult(Object result)

If the result is an ExitStatus already just return that, otherwise return ExitStatus.COMPLETED.

Parameters:

result - the value returned by the delegate method

Returns:

an ExitStatus consistent with the result