| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8044131 |
| * @summary Makes sure sjavac poolsize option is honored. |
| * @modules jdk.compiler/com.sun.tools.javac.main |
| * jdk.compiler/com.sun.tools.sjavac.comp |
| * jdk.compiler/com.sun.tools.sjavac.server |
| * @build Wrapper |
| * @run main Wrapper PooledExecution |
| */ |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import com.sun.tools.javac.main.Main.Result; |
| import com.sun.tools.sjavac.comp.PooledSjavac; |
| import com.sun.tools.sjavac.server.Sjavac; |
| |
| |
| public class PooledExecution { |
| |
| public static void main(String[] args) throws InterruptedException { |
| new PooledExecutionTest().runTest(); |
| } |
| |
| static class PooledExecutionTest { |
| |
| final int POOL_SIZE = 15; |
| final int NUM_REQUESTS = 100; |
| |
| // Number of tasks that has not yet started |
| CountDownLatch leftToStart = new CountDownLatch(NUM_REQUESTS); |
| |
| // Highest number of concurrently active request seen |
| int highWaterMark = 0; |
| |
| public void runTest() throws InterruptedException { |
| ConcurrencyLoggingService loggingService = new ConcurrencyLoggingService(); |
| final Sjavac service = new PooledSjavac(loggingService, POOL_SIZE); |
| |
| // Keep track of the number of finished tasks so we can make sure all |
| // tasks finishes gracefully upon shutdown. |
| Thread[] tasks = new Thread[NUM_REQUESTS]; |
| final AtomicInteger tasksFinished = new AtomicInteger(0); |
| |
| for (int i = 0; i < NUM_REQUESTS; i++) { |
| tasks[i] = new Thread() { |
| public void run() { |
| service.compile(new String[0]); |
| tasksFinished.incrementAndGet(); |
| } |
| }; |
| tasks[i].start(); |
| } |
| |
| // Wait for all tasks to start (but not necessarily run to completion) |
| leftToStart.await(); |
| |
| // Shutdown before all tasks are completed |
| System.out.println("Shutting down!"); |
| service.shutdown(); |
| |
| // Wait for all tasks to complete |
| for (Thread t : tasks) |
| t.join(); |
| |
| if (tasksFinished.get() != NUM_REQUESTS) { |
| throw new AssertionError(tasksFinished.get() + " out of " + |
| NUM_REQUESTS + " finished. Broken shutdown?"); |
| } |
| |
| if (highWaterMark > POOL_SIZE) { |
| throw new AssertionError("Pool size overused: " + highWaterMark + |
| " used out of " + POOL_SIZE + " allowed."); |
| } |
| |
| // Assuming more than POOL_SIZE requests can be processed within 1 sek: |
| if (highWaterMark < POOL_SIZE) { |
| throw new AssertionError("Pool size underused: " + highWaterMark + |
| " used out of " + POOL_SIZE + " allowed."); |
| } |
| } |
| |
| |
| private class ConcurrencyLoggingService implements Sjavac { |
| |
| // Keeps track of currently active requests |
| AtomicInteger activeRequests = new AtomicInteger(0); |
| |
| @Override |
| public Result compile(String[] args) { |
| leftToStart.countDown(); |
| int numActiveRequests = activeRequests.incrementAndGet(); |
| System.out.printf("Left to start: %2d / Currently active: %2d%n", |
| leftToStart.getCount(), |
| numActiveRequests); |
| highWaterMark = Math.max(highWaterMark, numActiveRequests); |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException ie) { |
| throw new RuntimeException("Interrupted", ie); |
| } |
| activeRequests.decrementAndGet(); |
| System.out.println("Task completed"); |
| return Result.OK; |
| } |
| |
| @Override |
| public void shutdown() { |
| } |
| } |
| } |
| } |