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 Makes sure sjavac poolsize option is honored. 28 * @modules jdk.compiler/com.sun.tools.javac.main 29 * jdk.compiler/com.sun.tools.sjavac.comp 30 * jdk.compiler/com.sun.tools.sjavac.server 31 * @build Wrapper 32 * @run main Wrapper PooledExecution 33 */ 34 35 import java.util.concurrent.CountDownLatch; 36 import java.util.concurrent.atomic.AtomicInteger; 37 38 import com.sun.tools.javac.main.Main.Result; 39 import com.sun.tools.sjavac.comp.PooledSjavac; 40 import com.sun.tools.sjavac.server.Sjavac; 41 42 43 public class PooledExecution { 44 45 public static void main(String[] args) throws InterruptedException { 46 new PooledExecutionTest().runTest(); 47 } 48 49 static class PooledExecutionTest { 50 51 final int POOL_SIZE = 15; 52 final int NUM_REQUESTS = 100; 53 54 // Number of tasks that has not yet started 55 CountDownLatch leftToStart = new CountDownLatch(NUM_REQUESTS); 56 57 // Highest number of concurrently active request seen 58 int highWaterMark = 0; 59 60 public void runTest() throws InterruptedException { 61 ConcurrencyLoggingService loggingService = new ConcurrencyLoggingService(); 62 final Sjavac service = new PooledSjavac(loggingService, POOL_SIZE); 63 64 // Keep track of the number of finished tasks so we can make sure all 65 // tasks finishes gracefully upon shutdown. 66 Thread[] tasks = new Thread[NUM_REQUESTS]; 67 final AtomicInteger tasksFinished = new AtomicInteger(0); 68 69 for (int i = 0; i < NUM_REQUESTS; i++) { 70 tasks[i] = new Thread() { 71 public void run() { 72 service.compile(new String[0]); 73 tasksFinished.incrementAndGet(); 74 } 75 }; 76 tasks[i].start(); 77 } 78 79 // Wait for all tasks to start (but not necessarily run to completion) 80 leftToStart.await(); 81 82 // Shutdown before all tasks are completed 83 System.out.println("Shutting down!"); 84 service.shutdown(); 85 86 // Wait for all tasks to complete 87 for (Thread t : tasks) 88 t.join(); 89 90 if (tasksFinished.get() != NUM_REQUESTS) { 91 throw new AssertionError(tasksFinished.get() + " out of " + 92 NUM_REQUESTS + " finished. Broken shutdown?"); 93 } 94 95 if (highWaterMark > POOL_SIZE) { 96 throw new AssertionError("Pool size overused: " + highWaterMark + 97 " used out of " + POOL_SIZE + " allowed."); 98 } 99 100 // Assuming more than POOL_SIZE requests can be processed within 1 sek: 101 if (highWaterMark < POOL_SIZE) { 102 throw new AssertionError("Pool size underused: " + highWaterMark + 103 " used out of " + POOL_SIZE + " allowed."); 104 } 105 } 106 107 108 private class ConcurrencyLoggingService implements Sjavac { 109 110 // Keeps track of currently active requests 111 AtomicInteger activeRequests = new AtomicInteger(0); 112 113 @Override 114 public Result compile(String[] args) { 115 leftToStart.countDown(); 116 int numActiveRequests = activeRequests.incrementAndGet(); 117 System.out.printf("Left to start: %2d / Currently active: %2d%n", 118 leftToStart.getCount(), 119 numActiveRequests); 120 highWaterMark = Math.max(highWaterMark, numActiveRequests); 121 try { 122 Thread.sleep(1000); 123 } catch (InterruptedException ie) { 124 throw new RuntimeException("Interrupted", ie); 125 } 126 activeRequests.decrementAndGet(); 127 System.out.println("Task completed"); 128 return Result.OK; 129 } 130 131 @Override 132 public void shutdown() { 133 } 134 } 135 } 136 }