Package org.apache.hadoop.hdfs.util

Class Canceler

java.lang.Object

org.apache.hadoop.hdfs.util.Canceler

@Private
public class Canceler
extends Object

Provides a simple interface where one thread can mark an operation for cancellation, and another thread can poll for whether the cancellation has occurred.

Constructor Summary

Constructors

Constructor	Description
Canceler()

Method Summary

Modifier and Type	Method	Description
void	cancel(String reason)	Requests that the current operation be canceled if it is still running.
String	getCancellationReason()
boolean	isCancelled()

Methods inherited from class java.lang.Object

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

Constructor Details

Canceler

public Canceler()

Method Details

cancel

public void cancel(String reason)

Requests that the current operation be canceled if it is still running. This does not block until the cancellation is successful.

Parameters:

reason - the reason why cancellation is requested

isCancelled

public boolean isCancelled()

getCancellationReason

public String getCancellationReason()