Package org.springframework.batch.core.step.job

Class JobStep

java.lang.Object

org.springframework.batch.core.step.AbstractStep

org.springframework.batch.core.step.job.JobStep

All Implemented Interfaces:

Step, org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanNameAware, org.springframework.beans.factory.InitializingBean

public class JobStep
extends AbstractStep

A Step that delegates to a Job to do its work. This is a great tool for managing dependencies between jobs, and also to modularise complex step logic into something that is testable in isolation. The job is executed with parameters that can be extracted from the step execution, hence this step can also be usefully used as the worker in a parallel or partitioned execution.

Author:

Dave Syer

Field Summary

Fields inherited from interface org.springframework.batch.core.Step

STEP_TYPE_KEY

Constructor Summary

Constructors

Constructor	Description
JobStep()

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()
protected void	doExecute(StepExecution stepExecution)	Execute the job provided by delegating to the JobLauncher to prevent duplicate executions.
void	setJob(Job job)	The Job to delegate to in this step.
void	setJobLauncher(JobLauncher jobLauncher)	A JobLauncher is required to be able to run the enclosed Job.
void	setJobParametersExtractor(JobParametersExtractor jobParametersExtractor)	The JobParametersExtractor is used to extract JobParametersExtractor from the StepExecution to run the Job.

Methods inherited from class org.springframework.batch.core.step.AbstractStep

close, doExecutionRegistration, doExecutionRelease, execute, getCompositeListener, getJobRepository, getName, getStartLimit, isAllowStartIfComplete, open, registerStepExecutionListener, setAllowStartIfComplete, setBeanName, setJobRepository, setName, setStartLimit, setStepExecutionListeners, toString

Methods inherited from class java.lang.Object

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

Constructor Details

JobStep

public JobStep()

Method Details

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Overrides:

afterPropertiesSet in class AbstractStep

Throws:

Exception

setJob

public void setJob(Job job)

The Job to delegate to in this step.

Parameters:

job - a Job

setJobLauncher

public void setJobLauncher(JobLauncher jobLauncher)

A JobLauncher is required to be able to run the enclosed Job.

Parameters:

jobLauncher - the JobLauncher to set

setJobParametersExtractor

public void setJobParametersExtractor(JobParametersExtractor jobParametersExtractor)

The JobParametersExtractor is used to extract JobParametersExtractor from the StepExecution to run the Job. By default an instance will be provided that simply copies the JobParameters from the parent job.

Parameters:

jobParametersExtractor - the JobParametersExtractor to set

doExecute

protected void doExecute(StepExecution stepExecution)
                  throws Exception

Execute the job provided by delegating to the JobLauncher to prevent duplicate executions. The job parameters will be generated by the JobParametersExtractor provided (if any), otherwise empty. On a restart, the job parameters will be the same as the last (failed) execution.

Specified by:

doExecute in class AbstractStep

Parameters:

stepExecution - the current step context

Throws:

Exception - checked exception thrown by implementation

See Also:

• AbstractStep.doExecute(StepExecution)