SharedFileBackedOutputStream (controller-docs 0.11.1 API)

java.lang.Object
- java.io.OutputStream
- - org.opendaylight.controller.cluster.io.FileBackedOutputStream
  - - org.opendaylight.controller.cluster.io.SharedFileBackedOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable
```
public class SharedFileBackedOutputStream
extends FileBackedOutputStream
```
A FileBackedOutputStream that allows for sharing in that it maintains a usage count and the backing file isn't deleted until the usage count reaches 0. The usage count is initialized to 1 on construction. Subsequent users of the instance must call incrementUsageCount(). The cleanup() method decrements the usage count and, when it reaches 0, the FileBackedOutputStream.cleanup() is called to delete the backing file.

Author:

Thomas Pantelis

Constructor Summary

Constructors
Constructor Description

SharedFileBackedOutputStream(int fileThreshold, String fileDirectory)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`cleanup()`	Overridden to decrement the usage count.
`int`	`getUsageCount()`	Returns the current usage count.
`void`	`incrementUsageCount()`	Increments the usage count.
`<T> void`	`setOnCleanupCallback(Consumer<T> callback, T context)`	Sets the callback to be notified when `FileBackedOutputStream.cleanup()` is called to delete the backing file.

Methods inherited from class org.opendaylight.controller.cluster.io.FileBackedOutputStream
asByteSource, close, flush, getCount, write, write, write

Methods inherited from class java.io.OutputStream
nullOutputStream

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

- Constructor Detail
  - SharedFileBackedOutputStream
```
public SharedFileBackedOutputStream(int fileThreshold,
                                    String fileDirectory)
```
- Method Detail
  - incrementUsageCount
```
public void incrementUsageCount()
```
    Increments the usage count. This must be followed by a corresponding call to cleanup() when this instance is no longer needed.
  - getUsageCount
```
public int getUsageCount()
```
    Returns the current usage count.
    
    Returns:
    
    the current usage count
  - setOnCleanupCallback
```
public <T> void setOnCleanupCallback(Consumer<T> callback,
                                     T context)
```
    Sets the callback to be notified when FileBackedOutputStream.cleanup() is called to delete the backing file.
  - cleanup
```
public void cleanup()
```
    Overridden to decrement the usage count.
    
    Overrides:
    
    cleanup in class FileBackedOutputStream