plantuml/src/net/sourceforge/plantuml/api/TimeoutExecutor.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2023, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
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 *
 * This file is part of PlantUML.
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 *
 *
 */
package net.sourceforge.plantuml.api;

import net.sourceforge.plantuml.log.Logger;

import java.util.concurrent.atomic.AtomicBoolean;

public final class TimeoutExecutor {

	private final long ms;

	public TimeoutExecutor(long ms) {
		this.ms = ms;
	}

	public boolean executeNow(MyRunnable task) {
		final MyThread mainThread = new MyThread(task);
		boolean done = false;
		try {
			mainThread.start();
			mainThread.join(ms);
		} catch (InterruptedException e) {
			System.err.println("TimeoutExecutorA " + e);
			Logger.error(e);
			return false;
		} finally {
			done = mainThread.done.get();
			if (done == false) {
				task.cancelJob();
				mainThread.interrupt();
			}
		}
		return done;
	}

	class MyThread extends Thread {
		private final MyRunnable task;
		private final AtomicBoolean done = new AtomicBoolean(false);

		private MyThread(MyRunnable task) {
			this.task = task;
		}

		@Override
		public void run() {
			try {
				task.runJob();
				done.set(true);
			} catch (InterruptedException e) {
				System.err.println("TimeoutExecutorB " + e);
				Logger.error(e);
			}
		}

	}
}