| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.monitor; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.Random; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.eclipse.jetty.util.component.Dumpable; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.StdErrLog; |
| import org.junit.Test; |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| */ |
| public class ThreadMonitorTest |
| { |
| public final static int DURATION=4000; |
| |
| @Test |
| public void monitorTest() throws Exception |
| { |
| ((StdErrLog)Log.getLogger(ThreadMonitor.class.getName())).setHideStacks(true); |
| ((StdErrLog)Log.getLogger(ThreadMonitor.class.getName())).setSource(false); |
| |
| final AtomicInteger countLogs=new AtomicInteger(0); |
| final AtomicInteger countSpin=new AtomicInteger(0); |
| |
| ThreadMonitor monitor = new ThreadMonitor(1000,50,1,1) |
| { |
| @Override |
| protected void logThreadInfo(boolean logAll) |
| { |
| if (logAll) |
| countLogs.incrementAndGet(); |
| else |
| countSpin.incrementAndGet(); |
| super.logThreadInfo(logAll); |
| } |
| }; |
| monitor.setDumpable(new Dumpable() |
| { |
| public void dump(Appendable out, String indent) throws IOException |
| { |
| out.append(dump()); |
| } |
| |
| public String dump() |
| { |
| return "Dump Spinning"; |
| } |
| }); |
| |
| monitor.logCpuUsage(2000,0); |
| monitor.start(); |
| |
| Random rnd = new Random(); |
| for (long cnt=0; cnt<100; cnt++) |
| { |
| long value = rnd.nextLong() % 50 + 50; |
| Sleeper sleeper = new Sleeper(value); |
| Thread runner = new Thread(sleeper); |
| runner.setDaemon(true); |
| runner.start(); |
| } |
| |
| Spinner spinner = new Spinner(); |
| Thread runner = new Thread(spinner); |
| runner.start(); |
| |
| Thread.sleep(DURATION); |
| |
| spinner.setDone(); |
| monitor.stop(); |
| |
| assertTrue(countLogs.get() >= 1); |
| assertTrue(countSpin.get() >= 2); |
| } |
| |
| |
| private class Spinner implements Runnable |
| { |
| private volatile boolean done = false; |
| |
| /* ------------------------------------------------------------ */ |
| public void setDone() |
| { |
| done = true; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void run() |
| { |
| spin(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void spin() |
| { |
| long result=-1; |
| long end=System.currentTimeMillis()+DURATION+1000; |
| while (!done && System.currentTimeMillis()<end) |
| { |
| for (int i=0;i<1000000000;i++) |
| result^=i; |
| } |
| |
| if (result==42) |
| System.err.println("Bingo!"); |
| } |
| } |
| |
| private class Sleeper implements Runnable |
| { |
| private long _value; |
| |
| /* ------------------------------------------------------------ */ |
| public Sleeper(long value) |
| { |
| _value = value; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void run() |
| { |
| try |
| { |
| fn(_value); |
| } |
| catch (InterruptedException e) {} |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public long fn(long value) throws InterruptedException |
| { |
| long result = value > 1 ? fn(value-1) : 1; |
| |
| Thread.sleep(50); |
| |
| return result; |
| } |
| } |
| } |