| /* |
| * Copyright (c) 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation |
| package org.eclipse.persistence.testing.tests.junit.helper; |
| |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.eclipse.persistence.internal.helper.ConcurrencyUtil; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| |
| public class ConcurrencySemaphoreTest { |
| |
| private static final int INITIAL_NO_OF_THREADS = 100; |
| private static final long MAX_TIME_PERMIT = 500L; |
| private static final long TIMEOUT_BETWEEN_LOG_MESSAGES = 20000L; |
| |
| @Before |
| public void setup() { |
| //This kind of setup is for test purpose only. Standard way is via persistence.xml properties or system properties. |
| ConcurrencyUtil.SINGLETON.setConcurrencySemaphoreMaxTimePermit(MAX_TIME_PERMIT); |
| ConcurrencyUtil.SINGLETON.setConcurrencySemaphoreLogTimeout(TIMEOUT_BETWEEN_LOG_MESSAGES); |
| } |
| |
| @Test |
| public void testConcurrencySemaphore() throws Exception { |
| //Verify setup |
| assertEquals(MAX_TIME_PERMIT, ConcurrencyUtil.SINGLETON.getConcurrencySemaphoreMaxTimePermit()); |
| assertEquals(TIMEOUT_BETWEEN_LOG_MESSAGES, ConcurrencyUtil.SINGLETON.getConcurrencySemaphoreLogTimeout()); |
| //Prepare executor and start threads |
| ExecutorService executorService = Executors.newFixedThreadPool(INITIAL_NO_OF_THREADS); |
| for (int i = 1; i <= INITIAL_NO_OF_THREADS; i++) { |
| Runnable thread = new ConcurrencySemaphoreThread(); |
| executorService.execute(thread); |
| } |
| executorService.shutdown(); |
| // Wait for everything to finish. |
| while (!executorService.awaitTermination(20, TimeUnit.SECONDS)) { |
| System.out.println("Awaiting completion of threads."); |
| } |
| } |
| } |