/*

 * Copyright (c) 2019, 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.

 */

/*

 * @test

 * @bug 8231387

 * @library ../testlibrary

 * @summary make sure getService() avoids a race

 * @author Tianmin Shi

 */

import java.security.Provider;

public class GetServiceRace {

    private static final Provider testProvider;

    static {

        testProvider = new Provider("MyProvider", 1.0, "test") {

        };

        testProvider.put("CertificateFactory.Fixed", "MyCertificateFactory");

    }

    private static final int NUMBER_OF_RETRIEVERS = 3;

    private static final int TEST_TIME_MS = 1000;

    public static boolean testFailed = false;

    public static void main(String[] args) throws Exception {

        Updater updater = new Updater();

        updater.start();

        Retriever [] retrievers = new Retriever[NUMBER_OF_RETRIEVERS];

        for (int i=0; i<retrievers.length; i++) {

            retrievers[i] = new Retriever();

            retrievers[i].start();

        }

        Thread.sleep(TEST_TIME_MS);

        System.out.println("Interrupt");

        updater.interrupt();

        updater.join();

        for (int i=0; i<retrievers.length; i++) {

            retrievers[i].interrupt();

            retrievers[i].join();

        }

        System.out.println("Done");

        if (testFailed) {

            throw new Exception("Test Failed");

        }

        System.out.println("Test Passed");

    }

    private static class Updater extends Thread {

        @Override

        public void run() {

            while (!isInterrupted()) {

                testProvider.put("CertificateFactory.Added", "MyCertificateFactory");

            }

            System.out.println("Updater stopped");

        }

    }

    private static class Retriever extends Thread {

        @Override

        public void run() {

            while (!isInterrupted()) {

                Provider.Service service = testProvider.getService("CertificateFactory", "Fixed");

                if (service == null) {

                    if (!testFailed) {

                        System.err.println("CertificateFactory.Fixed is NULL");

                        testFailed = true;

                    }

                } else {

                    //System.out.println("CertificateFactory.Fixed is good");

                }

            }

            System.out.println("Retriever stopped");

        }

    }

}