java.lang.Object
- org.springframework.batch.item.ItemStreamSupport
- - org.springframework.batch.item.support.AbstractItemStreamItemWriter<T>
  - - org.springframework.batch.item.file.MultiResourceItemWriter<T>

Type Parameters:
T - item type
All Implemented Interfaces:
ItemStream, ItemStreamWriter<T>, ItemWriter<T>
```
public class MultiResourceItemWriter<T>
extends AbstractItemStreamItemWriter<T>
```
Wraps a ResourceAwareItemWriterItemStream and creates a new output resource when the count of items written in current resource exceeds setItemCountLimitPerResource(int). Suffix creation can be customized with setResourceSuffixCreator(ResourceSuffixCreator). Note that new resources are created only at chunk boundaries i.e. the number of items written into one resource is between the limit set by setItemCountLimitPerResource(int) and (limit + chunk size).
Author:
Robert Kasanicky

Constructor Summary
Constructors
Constructor Description
MultiResourceItemWriter()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	No-op.
`void`	`open(ExecutionContext executionContext)`	No-op.
`void`	`setDelegate(ResourceAwareItemWriterItemStream<? super T> delegate)`	Delegate used for actual writing of the output.
`void`	`setItemCountLimitPerResource(int itemCountLimitPerResource)`	After this limit is exceeded the next chunk will be written into newly created resource.
`void`	`setResource(org.springframework.core.io.Resource resource)`	Prototype for output resources.
`void`	`setResourceSuffixCreator(ResourceSuffixCreator suffixCreator)`	Allows customization of the suffix of the created resources based on the index.
`void`	`setSaveState(boolean saveState)`	Indicates that the state of the reader will be saved after each commit.
`void`	`update(ExecutionContext executionContext)`	Return empty `ExecutionContext`.
`void`	`write(java.util.List<? extends T> items)`	Process the supplied data element.

Methods inherited from class org.springframework.batch.item.ItemStreamSupport
getExecutionContextKey, setExecutionContextName, setName

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

- Constructor Detail
  - MultiResourceItemWriter
```
public MultiResourceItemWriter()
```
- Method Detail
  - write
```
public void write(java.util.List<? extends T> items)
           throws java.lang.Exception
```
    Description copied from interface: ItemWriter
    Process the supplied data element. Will not be called with any null items in normal operation.
    Parameters:
    items - items to be written
    Throws:
    java.lang.Exception - if there are errors. The framework will catch the exception and convert or rethrow it as appropriate.
  - setResourceSuffixCreator
```
public void setResourceSuffixCreator(ResourceSuffixCreator suffixCreator)
```
    Allows customization of the suffix of the created resources based on the index.
    Parameters:
    suffixCreator - ResourceSuffixCreator to be used by the writer.
  - setItemCountLimitPerResource
```
public void setItemCountLimitPerResource(int itemCountLimitPerResource)
```
    After this limit is exceeded the next chunk will be written into newly created resource.
    Parameters:
    itemCountLimitPerResource - int item threshold used to determine when a new resource should be created.
  - setDelegate
```
public void setDelegate(ResourceAwareItemWriterItemStream<? super T> delegate)
```
    Delegate used for actual writing of the output.
    Parameters:
    delegate - ResourceAwareItemWriterItemStream that will be used to write the output.
  - setResource
```
public void setResource(org.springframework.core.io.Resource resource)
```
    Prototype for output resources. Actual output files will be created in the same directory and use the same name as this prototype with appended suffix (according to setResourceSuffixCreator(ResourceSuffixCreator).
    Parameters:
    resource - The prototype resource.
  - setSaveState
```
public void setSaveState(boolean saveState)
```
    Indicates that the state of the reader will be saved after each commit.
    Parameters:
    saveState - true the state is saved.
  - close
```
public void close()
           throws ItemStreamException
```
    Description copied from class: ItemStreamSupport
    No-op.
    Specified by:
    close in interface ItemStream
    Overrides:
    close in class ItemStreamSupport
    Throws:
    ItemStreamException
    See Also:
    ItemStream.close()
  - open
```
public void open(ExecutionContext executionContext)
          throws ItemStreamException
```
    Description copied from class: ItemStreamSupport
    No-op.
    Specified by:
    open in interface ItemStream
    Overrides:
    open in class ItemStreamSupport
    Parameters:
    executionContext - current step's ExecutionContext. Will be the executionContext from the last run of the step on a restart.
    Throws:
    ItemStreamException
    See Also:
    ItemStream.open(ExecutionContext)
  - update
```
public void update(ExecutionContext executionContext)
            throws ItemStreamException
```
    Description copied from class: ItemStreamSupport
    Return empty ExecutionContext.
    Specified by:
    update in interface ItemStream
    Overrides:
    update in class ItemStreamSupport
    Parameters:
    executionContext - to be updated
    Throws:
    ItemStreamException
    See Also:
    ItemStream.update(ExecutionContext)

Class MultiResourceItemWriter<T>

Constructor Summary

Method Summary

Methods inherited from class org.springframework.batch.item.ItemStreamSupport

Methods inherited from class java.lang.Object

Constructor Detail

MultiResourceItemWriter

Method Detail

write

setResourceSuffixCreator

setItemCountLimitPerResource

setDelegate

setResource

setSaveState

close

open

update