org.springframework.batch.core.step.tasklet

Interface Tasklet

All Known Subinterfaces:

StoppableTasklet

All Known Implementing Classes:

BatchletAdapter, CallableTaskletAdapter, ChunkOrientedTasklet, MethodInvokingTaskletAdapter, SystemCommandTasklet

public interface Tasklet

Strategy for processing in a step.

Author:

Dave Syer, Mahmoud Ben Hassine

Method Summary

Modifier and Type	Method and Description
RepeatStatus	execute(StepContribution contribution, ChunkContext chunkContext) Given the current context in the form of a step contribution, do whatever is necessary to process this unit inside a transaction.

Method Detail

execute

@Nullable
RepeatStatus execute(StepContribution contribution,
                               ChunkContext chunkContext)
                        throws java.lang.Exception

Given the current context in the form of a step contribution, do whatever is necessary to process this unit inside a transaction. Implementations return RepeatStatus.FINISHED if finished. If not they return RepeatStatus.CONTINUABLE. On failure throws an exception.

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:

java.lang.Exception - thrown if error occurs during execution.