RunnableDeath.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility;

import org.eclipse.persistence.tools.workbench.utility.string.StringTools;

/**
 * This runnable will sleep for a specified amount of time
 * and then kill the JVM with a call to System.exit() with
 * a specified exit status. If the thread is interrupted,
 * we will stop the thread without killing the JVM.
 */
public final class RunnableDeath implements Runnable {
    /** The time to wait before killing the JVM, in milliseconds. */
    private final int wait;
    /** The exit status code that will passed to the O/S on exit. */
    private final int exitStatus;

    /**
     * Construct a killer that will wait for the specified time and
     * exit with the specified exit status.
     */
    public RunnableDeath(int wait, int exitStatus) {
        super();
        this.wait = wait;
        this.exitStatus = exitStatus;
    }

    /**
     * @see Runnable#run()
     */
    public void run() {
        long stop = System.currentTimeMillis() + this.wait;
        long remaining = this.wait;
        while (remaining > 0L) {
            try {
                Thread.sleep(remaining);
            } catch (InterruptedException ex) {
                return;        // commuted death sentence
            }
            remaining = stop - System.currentTimeMillis();
        }
        System.exit(this.exitStatus);
    }

    /**
     * @see Object#toString()
     */
    public String toString() {
        return StringTools.buildToStringFor(this, "wait=" + this.wait + "; exit status=" + this.exitStatus);
    }

}