| /* |
| * Copyright (c) 2015, 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 |
| * @summary Test ServiceLoader with two iterators, interleaving their use |
| * to test that they don't interfere with each other |
| * @run testng TwoIterators |
| */ |
| |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.ServiceLoader; |
| |
| import org.testng.annotations.BeforeClass; |
| import org.testng.annotations.Test; |
| import static org.testng.Assert.*; |
| |
| public class TwoIterators { |
| |
| // service type |
| public static interface S { } |
| |
| // service provider implementations |
| public static class S1 implements S { } |
| public static class S2 implements S { } |
| |
| private ClassLoader testClassLoader; |
| |
| // creates the services configuration file and sets the ClassLoader |
| @BeforeClass |
| void setup() throws Exception { |
| String classes = System.getProperty("test.classes"); |
| Path dir = Paths.get(classes, "META-INF", "services"); |
| Files.createDirectories(dir); |
| Path config = dir.resolve(S.class.getName()); |
| Files.write(config, Arrays.asList(S1.class.getName(), S2.class.getName())); |
| |
| this.testClassLoader = TwoIterators.class.getClassLoader(); |
| } |
| |
| @Test |
| public void testSequentialUse1() { |
| ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader); |
| |
| Iterator<S> iterator1 = sl.iterator(); |
| iterator1.next(); |
| iterator1.next(); |
| assertFalse(iterator1.hasNext()); |
| |
| Iterator<S> iterator2 = sl.iterator(); |
| iterator2.next(); |
| iterator2.next(); |
| assertFalse(iterator2.hasNext()); |
| } |
| |
| @Test |
| public void testSequentialUse2() { |
| ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader); |
| |
| Iterator<S> iterator1 = sl.iterator(); |
| Iterator<S> iterator2 = sl.iterator(); |
| |
| iterator1.next(); |
| iterator1.next(); |
| assertFalse(iterator1.hasNext()); |
| |
| iterator2.next(); |
| iterator2.next(); |
| assertFalse(iterator2.hasNext()); |
| } |
| |
| @Test |
| public void testInterleaved1() { |
| ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader); |
| |
| Iterator<S> iterator1 = sl.iterator(); |
| Iterator<S> iterator2 = sl.iterator(); |
| |
| iterator1.next(); |
| iterator2.next(); |
| iterator1.next(); |
| iterator2.next(); |
| assertFalse(iterator1.hasNext()); |
| assertFalse(iterator2.hasNext()); |
| } |
| |
| @Test |
| public void testInterleaved2() { |
| ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader); |
| |
| Iterator<S> iterator1 = sl.iterator(); |
| iterator1.next(); |
| |
| Iterator<S> iterator2 = sl.iterator(); |
| |
| assertTrue(iterator1.hasNext()); |
| assertTrue(iterator2.hasNext()); |
| |
| iterator1.next(); |
| iterator2.next(); |
| iterator2.next(); |
| |
| assertFalse(iterator1.hasNext()); |
| assertFalse(iterator2.hasNext()); |
| } |
| |
| @Test |
| public void testInterleaved3() { |
| ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader); |
| |
| Iterator<S> iterator1 = sl.iterator(); |
| iterator1.next(); |
| |
| Iterator<S> iterator2 = sl.iterator(); |
| |
| assertTrue(iterator2.hasNext()); |
| assertTrue(iterator1.hasNext()); |
| |
| iterator2.next(); |
| iterator2.next(); |
| iterator1.next(); |
| |
| assertFalse(iterator1.hasNext()); |
| assertFalse(iterator2.hasNext()); |
| } |
| } |
| |