1/*
2 * Copyright (c) 2007, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 6464365
27 * @summary Test state transitions; check protected methods are called
28 * @author Martin Buchholz
29 */
30
31import java.util.concurrent.CancellationException;
32import java.util.concurrent.ExecutionException;
33import java.util.concurrent.FutureTask;
34import java.util.concurrent.TimeUnit;
35import java.util.concurrent.TimeoutException;
36import java.util.concurrent.atomic.AtomicLong;
37
38public class Customized {
39    static final AtomicLong doneCount = new AtomicLong(0);
40    static final AtomicLong setCount = new AtomicLong(0);
41    static final AtomicLong setExceptionCount = new AtomicLong(0);
42
43    static void equal(long expected, AtomicLong actual) {
44        equal(expected, actual.get());
45    }
46
47    static void equalCounts(long x, long y, long z) {
48        equal(x, doneCount);
49        equal(y, setCount);
50        equal(z, setExceptionCount);
51    }
52
53    static class MyFutureTask<V> extends FutureTask<V> {
54        MyFutureTask(Runnable r, V result) { super(r, result); }
55        protected void done() {
56            doneCount.getAndIncrement();
57            super.done();
58        }
59        protected void set(V v) {
60            setCount.getAndIncrement();
61            super.set(v);
62        }
63        protected void setException(Throwable t) {
64            setExceptionCount.getAndIncrement();
65            super.setException(t);
66        }
67        public boolean runAndReset() {
68            return super.runAndReset();
69        }
70    }
71
72    static <V> void checkReady(final FutureTask<V> task) {
73        check(! task.isDone());
74        check(! task.isCancelled());
75        THROWS(TimeoutException.class,
76               () -> task.get(0L, TimeUnit.SECONDS));
77    }
78
79    static <V> void checkDone(final FutureTask<V> task) {
80        try {
81            check(task.isDone());
82            check(! task.isCancelled());
83            check(task.get() != null);
84        } catch (Throwable t) { unexpected(t); }
85    }
86
87    static <V> void checkCancelled(final FutureTask<V> task) {
88        check(task.isDone());
89        check(task.isCancelled());
90        THROWS(CancellationException.class,
91               () -> task.get(0L, TimeUnit.SECONDS),
92               () -> task.get());
93    }
94
95    static <V> void checkThrew(final FutureTask<V> task) {
96        check(task.isDone());
97        check(! task.isCancelled());
98        THROWS(ExecutionException.class,
99               () -> task.get(0L, TimeUnit.SECONDS),
100               () -> task.get());
101    }
102
103    static <V> void cancel(FutureTask<V> task, boolean mayInterruptIfRunning) {
104        task.cancel(mayInterruptIfRunning);
105        checkCancelled(task);
106    }
107
108    static <V> void run(FutureTask<V> task) {
109        boolean isCancelled = task.isCancelled();
110        task.run();
111        check(task.isDone());
112        equal(isCancelled, task.isCancelled());
113    }
114
115    static void realMain(String[] args) throws Throwable {
116        final Runnable nop = new Runnable() {
117                public void run() {}};
118        final Runnable bad = new Runnable() {
119                public void run() { throw new Error(); }};
120
121        try {
122            final MyFutureTask<Long> task = new MyFutureTask<>(nop, 42L);
123            checkReady(task);
124            equalCounts(0,0,0);
125            check(task.runAndReset());
126            checkReady(task);
127            equalCounts(0,0,0);
128            run(task);
129            checkDone(task);
130            equalCounts(1,1,0);
131            equal(42L, task.get());
132            run(task);
133            checkDone(task);
134            equalCounts(1,1,0);
135            equal(42L, task.get());
136        } catch (Throwable t) { unexpected(t); }
137
138        try {
139            final MyFutureTask<Long> task = new MyFutureTask<>(nop, 42L);
140            cancel(task, false);
141            equalCounts(2,1,0);
142            cancel(task, false);
143            equalCounts(2,1,0);
144            run(task);
145            equalCounts(2,1,0);
146            check(! task.runAndReset());
147        } catch (Throwable t) { unexpected(t); }
148
149        try {
150            final MyFutureTask<Long> task = new MyFutureTask<>(bad, 42L);
151            checkReady(task);
152            run(task);
153            checkThrew(task);
154            equalCounts(3,1,1);
155            run(task);
156            equalCounts(3,1,1);
157        } catch (Throwable t) { unexpected(t); }
158
159        try {
160            final MyFutureTask<Long> task = new MyFutureTask<>(nop, 42L);
161            checkReady(task);
162            task.set(99L);
163            checkDone(task);
164            equalCounts(4,2,1);
165            run(task);
166            equalCounts(4,2,1);
167            task.setException(new Throwable());
168            checkDone(task);
169            equalCounts(4,2,2);
170        } catch (Throwable t) { unexpected(t); }
171
172        try {
173            final MyFutureTask<Long> task = new MyFutureTask<>(nop, 42L);
174            checkReady(task);
175            task.setException(new Throwable());
176            checkThrew(task);
177            equalCounts(5,2,3);
178            run(task);
179            equalCounts(5,2,3);
180            task.set(99L);
181            checkThrew(task);
182            equalCounts(5,3,3);
183        } catch (Throwable t) { unexpected(t); }
184
185        System.out.printf("doneCount=%d%n", doneCount.get());
186        System.out.printf("setCount=%d%n", setCount.get());
187        System.out.printf("setExceptionCount=%d%n", setExceptionCount.get());
188    }
189
190    //--------------------- Infrastructure ---------------------------
191    static volatile int passed = 0, failed = 0;
192    static void pass() {passed++;}
193    static void fail() {failed++; Thread.dumpStack();}
194    static void fail(String msg) {System.out.println(msg); fail();}
195    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
196    static void check(boolean cond) {if (cond) pass(); else fail();}
197    static void equal(Object x, Object y) {
198        if (x == null ? y == null : x.equals(y)) pass();
199        else fail(x + " not equal to " + y);}
200    public static void main(String[] args) throws Throwable {
201        try {realMain(args);} catch (Throwable t) {unexpected(t);}
202        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
203        if (failed > 0) throw new AssertionError("Some tests failed");}
204    interface Fun {void f() throws Throwable;}
205    static void THROWS(Class<? extends Throwable> k, Fun... fs) {
206        for (Fun f : fs)
207            try { f.f(); fail("Expected " + k.getName() + " not thrown"); }
208            catch (Throwable t) {
209                if (k.isAssignableFrom(t.getClass())) pass();
210                else unexpected(t);}}
211}
212