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79 lines
2.4 KiB
79 lines
2.4 KiB
//==============================================================================
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//
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// Copyright (c) 2015-
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// Authors:
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// * Joachim Klein <klein@tcs.inf.tu-dresden.de> (TU Dresden)
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//
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//------------------------------------------------------------------------------
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//
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// This file is part of PRISM.
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//
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// PRISM is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// PRISM is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with PRISM; if not, write to the Free Software Foundation,
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// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//==============================================================================
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package common;
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/**
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* Simple timeout mechanism.
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* After the specified number of seconds have elapsed (measured by
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* System.currentTimeMillis()), a Runnable is invoked.
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* Checks once per second.
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*/
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public class Timeout implements Runnable
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{
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/** The time after which the timeout is expired. */
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private final long timeoutTime;
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/** The Runnable to call after the timeout has expired. */
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private final Runnable timeoutRunnable;
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/**
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* Set a timeout.
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* Starts a (daemon) thread which checks if the timeout has elapsed.
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*/
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public static void setTimeout(int timeoutInSeconds, Runnable timeoutRunnable) {
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Timeout t = new Timeout(timeoutInSeconds, timeoutRunnable);
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Thread timeoutThread = new Thread(t);
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// the thread should be a daemon thread, because otherwise
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// the VM will not exit before the timeout is expired...
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timeoutThread.setDaemon(true);
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timeoutThread.start();
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}
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/**
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* Constructor.
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*/
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private Timeout(int timeoutInSeconds, Runnable timeoutRunnable)
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{
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timeoutTime = System.currentTimeMillis() + timeoutInSeconds*1000;
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this.timeoutRunnable = timeoutRunnable;
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}
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@Override
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public void run()
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{
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while (true) {
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long current = System.currentTimeMillis();
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if (current > timeoutTime) {
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// Timeout is expired, run Runnable
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timeoutRunnable.run();
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return;
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}
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try {
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Thread.sleep(1000);
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} catch (InterruptedException e) {}
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}
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}
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}
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