Package org.springframework.batch.integration.async

Class AsyncItemWriter<T>

java.lang.Object

org.springframework.batch.integration.async.AsyncItemWriter<T>

All Implemented Interfaces:

org.springframework.batch.item.ItemStream, org.springframework.batch.item.ItemStreamWriter<Future<T>>, org.springframework.batch.item.ItemWriter<Future<T>>, org.springframework.beans.factory.InitializingBean

public class AsyncItemWriter<T>
extends Object
implements org.springframework.batch.item.ItemStreamWriter<Future<T>>, org.springframework.beans.factory.InitializingBean

Constructor Summary

Constructors

Constructor	Description
AsyncItemWriter()

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()
void	close()
void	open(org.springframework.batch.item.ExecutionContext executionContext)
void	setDelegate(org.springframework.batch.item.ItemWriter<T> delegate)
void	update(org.springframework.batch.item.ExecutionContext executionContext)
void	write(org.springframework.batch.item.Chunk<? extends Future<T>> items)	In the processing of the Futures passed, nulls are not passed to the delegate since they are considered filtered out by the AsyncItemProcessor's delegated ItemProcessor.

Methods inherited from class java.lang.Object

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

Constructor Details

AsyncItemWriter

public AsyncItemWriter()

Method Details

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

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

Throws:

Exception

setDelegate

public void setDelegate(org.springframework.batch.item.ItemWriter<T> delegate)

Parameters:

delegate - ItemWriter that does the actual writing of the Future results

write

public void write(org.springframework.batch.item.Chunk<? extends Future<T>> items)
           throws Exception

In the processing of the Futures passed, nulls are not passed to the delegate since they are considered filtered out by the AsyncItemProcessor's delegated ItemProcessor. If the unwrapping of the Future results in an ExecutionException, that will be unwrapped and the cause will be thrown.

Specified by:

write in interface org.springframework.batch.item.ItemWriter<T>

Parameters:

items - Futures to be unwrapped and passed to the delegate

Throws:

Exception - The exception returned by the Future if one was thrown

open

public void open(org.springframework.batch.item.ExecutionContext executionContext)
          throws org.springframework.batch.item.ItemStreamException

Specified by:

open in interface org.springframework.batch.item.ItemStream

Throws:

org.springframework.batch.item.ItemStreamException

update

public void update(org.springframework.batch.item.ExecutionContext executionContext)
            throws org.springframework.batch.item.ItemStreamException

Specified by:

update in interface org.springframework.batch.item.ItemStream

Throws:

org.springframework.batch.item.ItemStreamException

close

public void close()
           throws org.springframework.batch.item.ItemStreamException

Specified by:

close in interface org.springframework.batch.item.ItemStream

Throws:

org.springframework.batch.item.ItemStreamException