/*

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

 *

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 * 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

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 */

/*

 * @test

 * @bug 7009998

 * @summary Tests the correct processing of concurrent ClientComunicatorAdmin reconnect requests.

 * @author Jaroslav Bachorik

 * @run clean CCAdminReconnectTest

 * @run build CCAdminReconnectTest

 * @run main CCAdminReconnectTest

 */

import com.sun.jmx.remote.internal.ClientCommunicatorAdmin;

import java.io.*;

import java.util.Collection;

import java.util.LinkedList;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.atomic.AtomicBoolean;

public class CCAdminReconnectTest {

    final private static int THREAD_COUNT = 3;

    public static void main(String ... args) throws Exception {

        final ExecutorService e = Executors.newFixedThreadPool(THREAD_COUNT);

        final AtomicBoolean beingReconnected = new AtomicBoolean();

        final Collection<Exception> thrownExceptions = new LinkedList<>();

        System.out.println(": Testing concurrent restart of ClientCommunicatorAdmin");

        final ClientCommunicatorAdmin cca = new ClientCommunicatorAdmin(50) {

            @Override

            protected void checkConnection() throws IOException {

                // empty

            }

            @Override

            protected void doStart() throws IOException {

                if (!beingReconnected.compareAndSet(false, true)) {

                    IOException e = new IOException("Detected overlayed reconnect requests");

                    thrownExceptions.add(e);

                    throw e;

                }

                try {

                    Thread.sleep(800); // simulating a workload

                    beingReconnected.set(false);

                } catch (InterruptedException e) {

                }

            }

            @Override

            protected void doStop() {

                // empty

            }

        };

        Runnable r = new Runnable() {

            final private IOException e = new IOException("Forced reconnect");

            @Override

            public void run() {

                try {

                    // forcing the reconnect request

                    cca.gotIOException(e);

                } catch (Exception ex) {

                    ex.printStackTrace();

                }

            }

        };

        System.out.println(": Spawning " + THREAD_COUNT + " concurrent reconnect requests");

        for(int i=0;i<THREAD_COUNT;i++) {

            e.execute(r);

        }

        Thread.sleep(THREAD_COUNT * 1000);

        e.shutdown();

        e.awaitTermination(10, TimeUnit.SECONDS);

        cca.terminate();

        for(Exception thrown : thrownExceptions) {

            throw thrown;

        }

        System.out.println(": Requests processed successfully");

    }

}