146 lines
4.6 KiB
Java
146 lines
4.6 KiB
Java
/*
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* Copyright (c) 2013, 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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import org.testng.annotations.Test;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.CompletionException;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.ThreadLocalRandom;
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import java.util.function.BiConsumer;
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import java.util.function.Supplier;
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import java.util.stream.IntStream;
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import java.util.stream.Stream;
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/**
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* @test
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* @bug 8028564
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* @run testng ConcurrentAssociateTest
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* @summary Test that association operations, such as put and compute,
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* place entries in the map
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*/
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@Test
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public class ConcurrentAssociateTest {
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// The number of entries for each thread to place in a map
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private static final int N = Integer.getInteger("n", 128);
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// The number of iterations of the test
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private static final int I = Integer.getInteger("i", 256);
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// Object to be placed in the concurrent map
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static class X {
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// Limit the hash code to trigger collisions
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int hc = ThreadLocalRandom.current().nextInt(1, 9);
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public int hashCode() { return hc; }
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}
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@Test
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public void testPut() {
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test("CHM.put", (m, o) -> m.put(o, o));
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}
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@Test
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public void testCompute() {
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test("CHM.compute", (m, o) -> m.compute(o, (k, v) -> o));
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}
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@Test
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public void testComputeIfAbsent() {
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test("CHM.computeIfAbsent", (m, o) -> m.computeIfAbsent(o, (k) -> o));
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}
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@Test
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public void testMerge() {
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test("CHM.merge", (m, o) -> m.merge(o, o, (v1, v2) -> v1));
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}
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@Test
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public void testPutAll() {
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test("CHM.putAll", (m, o) -> {
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Map<Object, Object> hm = new HashMap<>();
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hm.put(o, o);
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m.putAll(hm);
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});
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}
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private static void test(String desc, BiConsumer<ConcurrentMap<Object, Object>, Object> associator) {
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for (int i = 0; i < I; i++) {
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testOnce(desc, associator);
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}
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}
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static class AssociationFailure extends RuntimeException {
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AssociationFailure(String message) {
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super(message);
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}
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}
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private static void testOnce(String desc, BiConsumer<ConcurrentMap<Object, Object>, Object> associator) {
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ConcurrentHashMap<Object, Object> m = new ConcurrentHashMap<>();
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CountDownLatch s = new CountDownLatch(1);
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Supplier<Runnable> sr = () -> () -> {
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try {
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s.await();
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}
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catch (InterruptedException e) {
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}
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for (int i = 0; i < N; i++) {
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Object o = new X();
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associator.accept(m, o);
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if (!m.containsKey(o)) {
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throw new AssociationFailure(desc + " failed: entry does not exist");
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}
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}
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};
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int ps = Runtime.getRuntime().availableProcessors();
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Stream<CompletableFuture> runners = IntStream.range(0, ps)
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.mapToObj(i -> sr.get())
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.map(CompletableFuture::runAsync);
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CompletableFuture all = CompletableFuture.allOf(
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runners.toArray(CompletableFuture[]::new));
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// Trigger the runners to start associating
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s.countDown();
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try {
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all.join();
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} catch (CompletionException e) {
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Throwable t = e.getCause();
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if (t instanceof AssociationFailure) {
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throw (AssociationFailure) t;
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}
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else {
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throw e;
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}
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}
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}
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}
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