132 lines
4.1 KiB
Java
132 lines
4.1 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8022640
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* @summary Test verifies whether ServiceProvider API's of
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* ServiceRegistry are safe for concurrent access.
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* @run main ServiceRegistrySyncTest
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*/
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Locale;
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import javax.imageio.spi.ImageInputStreamSpi;
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import javax.imageio.spi.ServiceRegistry;
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import javax.imageio.stream.ImageInputStream;
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public class ServiceRegistrySyncTest {
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public static void main(String[] args) throws InterruptedException {
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final ArrayList<Class<?>> services = new ArrayList<Class<?>>();
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services.add(ImageInputStreamSpi.class);
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final ServiceRegistry reg = new ServiceRegistry(services.iterator());
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//create new thread for Registerer and Consumer Class
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Thread registerer = new Thread(new Registerer(reg));
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Thread consumer = new Thread(new Consumer(reg));
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//run both registerer and consumer thread parallely
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registerer.start();
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consumer.start();
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}
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static class Consumer implements Runnable {
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private final ServiceRegistry reg;
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boolean go = true;
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int duration;
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long start, end;
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public Consumer(ServiceRegistry r) {
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reg = r;
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//set 5000ms duration to run the test
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duration = 5000;
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}
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@Override
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public void run() {
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start = System.currentTimeMillis();
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end = start + duration;
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while (start < end) {
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//access the ServiceProvider API
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reg.getServiceProviders(ImageInputStreamSpi.class, true);
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start = System.currentTimeMillis();
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}
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}
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}
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static class Registerer implements Runnable {
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private final ServiceRegistry reg;
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boolean go = true;
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int duration;
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long start, end;
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public Registerer(ServiceRegistry r) {
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reg = r;
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//set 5000ms duration to run the test
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duration = 5000;
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}
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@Override
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public void run() {
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final int N = 20;
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MyService[] services = new MyService[N];
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for (int i = 0; i < N; i++) {
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services[i] = new MyService();
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}
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start = System.currentTimeMillis();
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end = start + duration;
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while (start < end) {
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//access the ServiceProvider API's
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for (int i = 0; i < N; i++) {
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reg.registerServiceProvider(services[i]);
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}
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for (int i = 0; i < N; i++) {
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reg.deregisterServiceProvider(services[i]);
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}
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start = System.currentTimeMillis();
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}
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}
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}
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}
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class MyService extends ImageInputStreamSpi {
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public MyService() {
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}
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@Override
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public String getDescription(Locale locale) {
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return null;
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}
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@Override
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public ImageInputStream createInputStreamInstance
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(Object input, boolean useCache, File cacheDir) throws IOException {
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return null;
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}
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}
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