test/lib/jdk/test/lib/jfr/Stressor.java

/*
 * Copyright (c) 2016, 2018, 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
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 */
package jdk.test.lib.jfr;

import java.util.ArrayList;
import java.util.List;

/**
 * Class to help run multiple threads executing some task
 *
 *
 * @since 1.9
 */
public class Stressor {
    public static void execute(int numberOfThreads, Thread.UncaughtExceptionHandler eh, Runnable task) throws Exception {
        List<Thread> threads = new ArrayList<>();
        for (int n = 0; n < numberOfThreads; ++n) {
            Thread t = new Thread(task);
            t.setUncaughtExceptionHandler(eh);
            threads.add(t);
            t.start();
        }
        for (Thread t : threads) {
            t.join();
        }
    }
}