| /* |
| * Copyright (c) 2016, 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 8022640 |
| * @summary Test verifies whether ServiceProvider API's of |
| * ServiceRegistry are safe for concurrent access. |
| * @run main ServiceRegistrySyncTest |
| */ |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Locale; |
| import javax.imageio.spi.ImageInputStreamSpi; |
| import javax.imageio.spi.ServiceRegistry; |
| import javax.imageio.stream.ImageInputStream; |
| |
| public class ServiceRegistrySyncTest { |
| public static void main(String[] args) throws InterruptedException { |
| |
| final ArrayList<Class<?>> services = new ArrayList<Class<?>>(); |
| services.add(ImageInputStreamSpi.class); |
| |
| final ServiceRegistry reg = new ServiceRegistry(services.iterator()); |
| |
| //create new thread for Registerer and Consumer Class |
| Thread registerer = new Thread(new Registerer(reg)); |
| Thread consumer = new Thread(new Consumer(reg)); |
| |
| //run both registerer and consumer thread parallely |
| registerer.start(); |
| consumer.start(); |
| } |
| |
| static class Consumer implements Runnable { |
| private final ServiceRegistry reg; |
| boolean go = true; |
| int duration; |
| long start, end; |
| |
| public Consumer(ServiceRegistry r) { |
| reg = r; |
| //set 5000ms duration to run the test |
| duration = 5000; |
| } |
| |
| @Override |
| public void run() { |
| start = System.currentTimeMillis(); |
| end = start + duration; |
| while (start < end) { |
| //access the ServiceProvider API |
| reg.getServiceProviders(ImageInputStreamSpi.class, true); |
| start = System.currentTimeMillis(); |
| } |
| } |
| } |
| |
| static class Registerer implements Runnable { |
| private final ServiceRegistry reg; |
| boolean go = true; |
| int duration; |
| long start, end; |
| |
| public Registerer(ServiceRegistry r) { |
| reg = r; |
| //set 5000ms duration to run the test |
| duration = 5000; |
| } |
| |
| @Override |
| public void run() { |
| final int N = 20; |
| |
| MyService[] services = new MyService[N]; |
| for (int i = 0; i < N; i++) { |
| services[i] = new MyService(); |
| } |
| start = System.currentTimeMillis(); |
| end = start + duration; |
| while (start < end) { |
| //access the ServiceProvider API's |
| for (int i = 0; i < N; i++) { |
| reg.registerServiceProvider(services[i]); |
| } |
| for (int i = 0; i < N; i++) { |
| reg.deregisterServiceProvider(services[i]); |
| } |
| start = System.currentTimeMillis(); |
| } |
| } |
| } |
| } |
| |
| class MyService extends ImageInputStreamSpi { |
| public MyService() { |
| } |
| |
| @Override |
| public String getDescription(Locale locale) { |
| return null; |
| } |
| |
| @Override |
| public ImageInputStream createInputStreamInstance |
| (Object input, boolean useCache, File cacheDir) throws IOException { |
| return null; |
| } |
| } |