ItemProcessListener (Spring Batch 4.1.4.RELEASE API)

All Superinterfaces:
StepListener
All Known Implementing Classes:
CompositeItemProcessListener, DefaultItemFailureHandler, ItemListenerSupport, ItemProcessListenerAdapter, MulticasterBatchListener, StagingItemListener, StepListenerSupport
```
public interface ItemProcessListener<T,S>
extends StepListener
```
Listener interface for the processing of an item. Implementations of this interface will be notified before and after an item is passed to the ItemProcessor and in the event of any exceptions thrown by the processor.
Author:
Dave Syer, Mahmoud Ben Hassine

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`afterProcess(T item, S result)`	Called after `ItemProcessor.process(Object)` returns.
`void`	`beforeProcess(T item)`	Called before `ItemProcessor.process(Object)`.
`void`	`onProcessError(T item, java.lang.Exception e)`	Called if an exception was thrown from `ItemProcessor.process(Object)`.

- Method Detail
  - beforeProcess
```
void beforeProcess(T item)
```
    Called before ItemProcessor.process(Object).
    Parameters:
    item - to be processed.
  - afterProcess
```
void afterProcess(T item,
                  @Nullable
                  S result)
```
    Called after ItemProcessor.process(Object) returns. If the processor returns null, this method will still be called, with a {code null} result, allowing for notification of 'filtered' items.
    Parameters:
    item - to be processed
    result - of processing
  - onProcessError
```
void onProcessError(T item,
                    java.lang.Exception e)
```
    Called if an exception was thrown from ItemProcessor.process(Object).
    Parameters:
    item - attempted to be processed
    e - - exception thrown during processing.