http://www.eclipse.org/jgit//org.eclipse.jgit: Repository access and algorithms (Eclipse JGit Project)
  • Eclipse Distribution License (New BSD License)
  • Andrey Loskutov
  • Christian Halstrick
  • Dave Borowitz
  • David Pursehouse
  • Gunnar Wagenknecht
  • Jonathan Nieder
  • Jonathan Tan
  • Matthias Sohn
  • Sasa Zivkov
  • Terry Parker
  • Thomas Wolf 
/*
 * Copyright (C) 2010, Google Inc.
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.eclipse.jgit.lib;


Asynchronous operation handle.
Callers that start an asynchronous operation are supplied with a handle that
may be used to attempt cancellation of the operation if the caller does not
wish to continue.

/**
 * Asynchronous operation handle.
 *
 * Callers that start an asynchronous operation are supplied with a handle that
 * may be used to attempt cancellation of the operation if the caller does not
 * wish to continue.
 */
public interface AsyncOperation {
	
Cancels the running task.
Attempts to cancel execution of this task. This attempt will fail if the
task has already completed, already been cancelled, or could not be
cancelled for some other reason. If successful, and this task has not
started when cancel is called, this task should never run. If the task
has already started, then the mayInterruptIfRunning parameter determines
whether the thread executing this task should be interrupted in an
attempt to stop the task.

Params:
  • mayInterruptIfRunning – 
           true if the thread executing this task should be interrupted;
           otherwise, in-progress tasks are allowed to complete
Returns:false if the task could not be cancelled, typically because it
        has already completed normally; true otherwise
/**
	 * Cancels the running task.
	 *
	 * Attempts to cancel execution of this task. This attempt will fail if the
	 * task has already completed, already been cancelled, or could not be
	 * cancelled for some other reason. If successful, and this task has not
	 * started when cancel is called, this task should never run. If the task
	 * has already started, then the mayInterruptIfRunning parameter determines
	 * whether the thread executing this task should be interrupted in an
	 * attempt to stop the task.
	 *
	 * @param mayInterruptIfRunning
	 *            true if the thread executing this task should be interrupted;
	 *            otherwise, in-progress tasks are allowed to complete
	 * @return false if the task could not be cancelled, typically because it
	 *         has already completed normally; true otherwise
	 */
	boolean cancel(boolean mayInterruptIfRunning);

	
Release resources used by the operation, including cancellation.

/**
	 * Release resources used by the operation, including cancellation.
	 */
	void release();
}