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