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 
  34 import java.util.concurrent.atomic.AtomicLong;
  35 
  36 import com.sun.tools.javac.main.Main.Result;
  37 import com.sun.tools.sjavac.server.IdleResetSjavac;
  38 import com.sun.tools.sjavac.server.Sjavac;
  39 import com.sun.tools.sjavac.server.Terminable;
  40 
  41 
  42 public 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 }