/*

 * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* Utility class for test threads

 *

 */

import java.io.*;

public abstract class TestThread

    extends Thread

{

    Exception failure = null;

    String name;

    protected final PrintStream log;

    Thread main;

    TestThread(String name, PrintStream log) {

        super("TestThread-" + name);

        this.name = name;

        this.log = log;

        this.main = Thread.currentThread();

        setDaemon(true);

    }

    TestThread(String name) {

        this(name, System.err);

    }

    abstract void go() throws Exception;

    public void run() {

        try {

            go();

        } catch (Exception x) {

            failure = x;

            main.interrupt();

        }

    }

    int finish(long timeout) {

        try {

            join(timeout);

        } catch (InterruptedException x) { }

        if (isAlive() && (failure == null))

            failure = new Exception(name + ": Timed out");

        if (failure != null) {

            failure.printStackTrace(log);

            return 0;

        }

        return 1;

    }

    void finishAndThrow(long timeout) throws Exception {

        try {

            join(timeout);

        } catch (InterruptedException x) { }

        if (failure != null)

            failure = new Exception(name + " threw an exception",

                                    failure);

        if (isAlive() && (failure == null))

            failure = new Exception(name + " timed out");

        if (failure != null)

            throw failure;

    }

    public String toString() {

        return name;

    }

}