JobParameterExecutionContextCopyListener (Spring Batch 4.1.4.RELEASE API)

java.lang.Object
- org.springframework.batch.core.listener.StepExecutionListenerSupport
- - org.springframework.batch.core.listener.JobParameterExecutionContextCopyListener

All Implemented Interfaces:
StepExecutionListener, StepListener
```
public class JobParameterExecutionContextCopyListener
extends StepExecutionListenerSupport
```
This class can be used to automatically copy items from the JobParameters to the StepExecutionContext. A list of keys should be provided that correspond to the items in the StepExecutionContext that should be copied.
Since:
2.0
Author:
Dave Syer

Constructor Summary
Constructors
Constructor Description
JobParameterExecutionContextCopyListener()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`beforeStep(StepExecution stepExecution)`	Copy attributes from the `JobParameters` to the `StepExecutionContext`, if not already present.
`void`	`setKeys(java.lang.String[] keys)`

Methods inherited from class org.springframework.batch.core.listener.StepExecutionListenerSupport
afterStep

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - JobParameterExecutionContextCopyListener
```
public JobParameterExecutionContextCopyListener()
```
- Method Detail
  - setKeys
```
public void setKeys(java.lang.String[] keys)
```
    Parameters:
    keys - A list of keys corresponding to items in the JobParameters that should be copied.
  - beforeStep
```
public void beforeStep(StepExecution stepExecution)
```
    Copy attributes from the JobParameters to the StepExecutionContext, if not already present. The the key is already present we assume that a restart is in operation and the previous value is needed. If the provided keys are empty defaults to copy all keys in the JobParameters.
    Specified by:
    beforeStep in interface StepExecutionListener
    Overrides:
    beforeStep in class StepExecutionListenerSupport
    Parameters:
    stepExecution - instance of StepExecution.