com.ericsson.research.trap.utils.RunnableFuture Maven / Gradle / Ivy
package com.ericsson.research.trap.utils;
/*
* ##_BEGIN_LICENSE_##
* Transport Abstraction Package (trap)
* ----------
* Copyright (C) 2014 Ericsson AB
* ----------
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the Ericsson AB 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 HOLDER 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.
* ##_END_LICENSE_##
*/
public class RunnableFuture implements Future, Runnable
{
private Runnable task;
boolean run = false;
public RunnableFuture(Runnable task)
{
this.task = task;
}
public boolean cancel()
{
return this.cancel(false);
}
public boolean cancel(boolean mayInterruptIfRunning)
{
if (this.run)
return false;
this.task = null;
return true;
}
public boolean isCancelled()
{
return !this.run && (this.task == null);
}
public boolean isDone()
{
return this.run;
}
public void run()
{
if (this.task != null)
{
this.run = true;
try
{
this.task.run();
}
finally
{
this.task = null;
}
}
}
}