/*
 * Copyright (c) 2014, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 */
package resources;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;

/**
 *
 * @author Jaroslav Bachorik
 */
abstract public class TestApp implements TestPrinter {
    final public void start() throws Exception {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                startWork();
            }
        }, "Worker Thread");
        System.out.println("ready:" + getPID());
        System.out.flush();
        t.setDaemon(true);
        t.start();

        do {
            String resp = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8)).readLine();
            System.out.println("Received " + resp + " - " + "done".contains(resp));
            if ("done".contains(resp)) {
                System.out.flush();
                System.out.println(System.currentTimeMillis() + ":  Interrupting the worker thread");
                t.interrupt();
                System.out.println(System.currentTimeMillis() + ": Waiting for the worker thread to finish");
                t.join(1000);
                if (t.isAlive()) {
                    Thread.dumpStack();
                    throw new RuntimeException("Dangling worker thread");
                }
                System.out.println(System.currentTimeMillis() + ": Worker thread finished");
                break;
            }
        } while (true);
    }

    private static long getPID() {
        String processName
                = java.lang.management.ManagementFactory.getRuntimeMXBean().getName();
        return Long.parseLong(processName.split("@")[0]);
    }

    /**
     * The work here should be done repeatedly until the thread gets interrupted
     */
    abstract protected void startWork();
}
