IdleShutdown.java revision 3573:c4a18ee691c4 
1/*
2 * Copyright (c) 2014, 2016, 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 8044131
27 * @summary Tests the hooks used for detecting idleness of the sjavac server.
28 * @modules jdk.compiler/com.sun.tools.javac.main
29 *          jdk.compiler/com.sun.tools.sjavac.server
30 * @build Wrapper
31 * @run main Wrapper IdleShutdown
32 */
33
34import java.util.concurrent.atomic.AtomicLong;
35
36import com.sun.tools.javac.main.Main.Result;
37import com.sun.tools.sjavac.server.IdleResetSjavac;
38import com.sun.tools.sjavac.server.Sjavac;
39import com.sun.tools.sjavac.server.Terminable;
40
41
42public class IdleShutdown {
43
44    final static long TEST_START = System.currentTimeMillis();
45    final static long TIMEOUT_MS = 3000;
46
47    public static void main(String[] args) throws InterruptedException {
48
49        final AtomicLong timeoutTimestamp = new AtomicLong(-1);
50
51        log("Starting IdleCallbackJavacService with timeout: " + TIMEOUT_MS);
52        Sjavac service = new IdleResetSjavac(
53                new NoopJavacService(),
54                new Terminable() {
55                    public void shutdown(String msg) {
56                        // Record the idle timeout time
57                        log("Timeout detected");
58                        timeoutTimestamp.set(System.currentTimeMillis());
59                    }
60                },
61                TIMEOUT_MS);
62
63        // Make sure it didn't timeout immediately
64        if (timeoutTimestamp.get() != -1)
65            throw new AssertionError("Premature timeout detected.");
66
67        // Use Sjavac object and wait less than TIMEOUT_MS in between calls
68        Thread.sleep(TIMEOUT_MS - 1000);
69        log("Compiling");
70        service.compile(new String[0]);
71
72        Thread.sleep(TIMEOUT_MS - 1000);
73        log("Compiling");
74        service.compile(new String[0]);
75
76        if (timeoutTimestamp.get() != -1)
77            throw new AssertionError("Premature timeout detected.");
78
79        long expectedTimeout = System.currentTimeMillis() + TIMEOUT_MS;
80
81        // Wait for actual timeout
82        log("Awaiting idle timeout");
83        Thread.sleep(TIMEOUT_MS + 1000);
84
85        // Check result
86        if (timeoutTimestamp.get() == -1)
87            throw new AssertionError("Timeout never occurred");
88
89        long error = Math.abs(expectedTimeout - timeoutTimestamp.get());
90        log("Timeout error: " + error + " ms");
91        if (error > TIMEOUT_MS * .1)
92            throw new AssertionError("Error too big");
93
94        log("Shutting down");
95        service.shutdown();
96    }
97
98    private static void log(String msg) {
99        long logTime = System.currentTimeMillis() - TEST_START;
100        System.out.printf("After %5d ms: %s%n", logTime, msg);
101    }
102
103    private static class NoopJavacService implements Sjavac {
104        @Override
105        public void shutdown() {
106        }
107        @Override
108        public Result compile(String[] args) {
109            // Attempt to trigger idle timeout during a call by sleeping
110            try {
111                Thread.sleep(TIMEOUT_MS + 1000);
112            } catch (InterruptedException e) {
113            }
114            return Result.OK;
115        }
116    }
117}
118