/*

 * Copyright (c) 2010, 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 4517279

 * @summary Stochastic test of thread-local coder caches

 */

import java.nio.*;

import java.nio.charset.*;

import java.util.*;

public class BashCache {

    private static final int THREADS = 10;

    private static final int TRIALS = 1000;

    private static final Charset[] charsets

        = new Charset[] {

            Charset.forName("US-ASCII"),

            Charset.forName("UTF-8"),

            Charset.forName("CP1252"),

            Charset.forName("UTF-16BE") };

    private static volatile boolean failed = false;

    private static class Basher extends Thread {

        Random rnd = new Random(System.identityHashCode(this));

        public void run() {

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

                Charset cs = charsets[rnd.nextInt(4)];

                try {

                    if (rnd.nextBoolean()) {

                        cs.encode("hi mom");

                    } else {

                        cs.decode(ByteBuffer.wrap(new byte[] {

                            (byte)'x', (byte)'y',

                            (byte)'z', (byte)'z',

                            (byte)'y' }));

                    }

                } catch (Exception x) {

                    x.printStackTrace();

                    failed = true;

                    return;

                }

                if (rnd.nextBoolean())

                    Thread.yield();

            }

        }

    }

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

        Charset cs = Charset.forName("us-ascii");

        Basher[] bashers = new Basher[THREADS];

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

            bashers[i] = new Basher();

            bashers[i].start();

        }

        for (int i = 0; i < THREADS; i++)

            bashers[i].join();

        if (failed)

            throw new Exception("Test failed");

    }

}