115 lines
4.7 KiB
Java
115 lines
4.7 KiB
Java
/*
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* Copyright (c) 2005, 2006, 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 6355660 6347106 6394004
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* @summary methods taking concurrently mutating collection should work
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* @author Martin Buchholz
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*/
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import java.lang.reflect.Constructor;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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import java.util.PriorityQueue;
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import java.util.Vector;
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import java.util.concurrent.CopyOnWriteArrayList;
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import java.util.concurrent.PriorityBlockingQueue;
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@SuppressWarnings("unchecked")
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public class HotPotatoes {
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private static void realMain(String[] args) throws Throwable {
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testImplementation(Vector.class);
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testImplementation(ArrayList.class);
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testImplementation(PriorityQueue.class);
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testImplementation(PriorityBlockingQueue.class);
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}
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private static void testImplementation(Class<? extends Collection> implClazz)
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throws Throwable
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{
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testPotato(implClazz, Vector.class);
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testPotato(implClazz, CopyOnWriteArrayList.class);
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final Constructor<? extends Collection> constr
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= implClazz.getConstructor(Collection.class);
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final Collection<Object> coll
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= constr.newInstance(Arrays.asList(new String[] {}));
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coll.add(1);
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equal(coll.toString(), "[1]");
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}
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private static void testPotato(Class<? extends Collection> implClazz,
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Class<? extends List> argClazz)
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throws Throwable
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{
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try {
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System.out.printf("implClazz=%s, argClazz=%s\n",
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implClazz.getName(), argClazz.getName());
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final int iterations = 100000;
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final List<Integer> list = (List<Integer>)
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argClazz.getDeclaredConstructor().newInstance();
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final Integer one = Integer.valueOf(1);
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final List<Integer> oneElementList = Collections.singletonList(one);
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final Constructor<? extends Collection> constr
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= implClazz.getConstructor(Collection.class);
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final Thread t = new CheckedThread() { public void realRun() {
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for (int i = 0; i < iterations; i++) {
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list.add(one);
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list.remove(one);
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}}};
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t.setDaemon(true);
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t.start();
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for (int i = 0; i < iterations; i++) {
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Collection<?> coll = constr.newInstance(list);
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Object[] elts = coll.toArray();
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check(elts.length == 0 ||
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(elts.length == 1 && elts[0] == one));
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}
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} catch (Throwable t) { unexpected(t); }
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}
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//--------------------- Infrastructure ---------------------------
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static volatile int passed = 0, failed = 0;
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static void pass() {passed++;}
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static void fail() {failed++; Thread.dumpStack();}
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static void fail(String msg) {System.out.println(msg); fail();}
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static void unexpected(Throwable t) {failed++; t.printStackTrace();}
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static void check(boolean cond) {if (cond) pass(); else fail();}
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static void equal(Object x, Object y) {
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if (x == null ? y == null : x.equals(y)) pass();
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else fail(x + " not equal to " + y);}
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public static void main(String[] args) throws Throwable {
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try {realMain(args);} catch (Throwable t) {unexpected(t);}
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
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if (failed > 0) throw new AssertionError("Some tests failed");}
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private abstract static class CheckedThread extends Thread {
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public abstract void realRun() throws Throwable;
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public void run() {
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try { realRun(); } catch (Throwable t) { unexpected(t); }}}
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}
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