/*

 * Copyright (c) 2003, 2011, 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 4892841

 * @summary     Subject.getPrincipals(Class) not thread-safe against changes to

 *              principals

 */

import java.util.Set;

import javax.security.auth.Subject;

import javax.security.auth.x500.X500Principal;

public class Synch3 {

    static volatile boolean finished = false;

    public static void main(String[] args) {

        Subject subject = new Subject();

        final Set principals = subject.getPrincipals();

        principals.add(new X500Principal("CN=Alice"));

        new Thread() {

            {

                start();

            }

            public void run() {

                X500Principal p = new X500Principal("CN=Bob");

                while (!finished) {

                    principals.add(p);

                    principals.remove(p);

                }

            }

        };

        for (int i = 0; i < 1000; i++) {

            subject.getPrincipals(X500Principal.class);

        }

        finished = true;

    }

}