| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 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.util; |
| |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.eclipse.jetty.util.thread.ScheduledExecutorScheduler; |
| import org.eclipse.jetty.util.thread.Scheduler; |
| import org.junit.AfterClass; |
| import org.junit.Assert; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| public class IteratingCallbackTest |
| { |
| static Scheduler scheduler = new ScheduledExecutorScheduler(); |
| |
| @BeforeClass |
| public static void beforeClass() throws Exception |
| { |
| scheduler.start(); |
| } |
| |
| @AfterClass |
| public static void afterClass() throws Exception |
| { |
| scheduler.stop(); |
| } |
| |
| @Test |
| public void testNonWaitingProcess() throws Exception |
| { |
| |
| TestCB cb=new TestCB() |
| { |
| int i=10; |
| |
| @Override |
| protected Action process() throws Exception |
| { |
| processed++; |
| if (i-->1) |
| { |
| succeeded(); // fake a completed IO operation |
| return Action.SCHEDULED; |
| } |
| return Action.SUCCEEDED; |
| } |
| }; |
| |
| cb.iterate(); |
| Assert.assertTrue(cb.waitForComplete()); |
| Assert.assertEquals(10,cb.processed); |
| } |
| |
| |
| |
| @Test |
| public void testWaitingProcess() throws Exception |
| { |
| TestCB cb=new TestCB() |
| { |
| int i=4; |
| |
| @Override |
| protected Action process() throws Exception |
| { |
| processed++; |
| if (i-->1) |
| { |
| scheduler.schedule(successTask,50,TimeUnit.MILLISECONDS); |
| return Action.SCHEDULED; |
| } |
| return Action.SUCCEEDED; |
| } |
| }; |
| |
| cb.iterate(); |
| |
| Assert.assertTrue(cb.waitForComplete()); |
| |
| Assert.assertEquals(4,cb.processed); |
| } |
| |
| @Test |
| public void testWaitingProcessSpuriousInterate() throws Exception |
| { |
| final TestCB cb=new TestCB() |
| { |
| int i=4; |
| |
| @Override |
| protected Action process() throws Exception |
| { |
| processed++; |
| if (i-->1) |
| { |
| scheduler.schedule(successTask,50,TimeUnit.MILLISECONDS); |
| return Action.SCHEDULED; |
| } |
| return Action.SUCCEEDED; |
| } |
| }; |
| |
| cb.iterate(); |
| scheduler.schedule(new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| cb.iterate(); |
| if (!cb.isSucceeded()) |
| scheduler.schedule(this,50,TimeUnit.MILLISECONDS); |
| } |
| },49,TimeUnit.MILLISECONDS); |
| |
| Assert.assertTrue(cb.waitForComplete()); |
| |
| Assert.assertEquals(4,cb.processed); |
| } |
| |
| @Test |
| public void testNonWaitingProcessFailure() throws Exception |
| { |
| TestCB cb=new TestCB() |
| { |
| int i=10; |
| |
| @Override |
| protected Action process() throws Exception |
| { |
| processed++; |
| if (i-->1) |
| { |
| if (i>5) |
| succeeded(); // fake a completed IO operation |
| else |
| failed(new Exception("testing")); |
| return Action.SCHEDULED; |
| } |
| return Action.SUCCEEDED; |
| } |
| }; |
| |
| cb.iterate(); |
| Assert.assertFalse(cb.waitForComplete()); |
| Assert.assertEquals(5,cb.processed); |
| } |
| |
| @Test |
| public void testWaitingProcessFailure() throws Exception |
| { |
| TestCB cb=new TestCB() |
| { |
| int i=4; |
| |
| @Override |
| protected Action process() throws Exception |
| { |
| processed++; |
| if (i-->1) |
| { |
| scheduler.schedule(i>2?successTask:failTask,50,TimeUnit.MILLISECONDS); |
| return Action.SCHEDULED; |
| } |
| return Action.SUCCEEDED; |
| } |
| }; |
| |
| cb.iterate(); |
| |
| Assert.assertFalse(cb.waitForComplete()); |
| Assert.assertEquals(2,cb.processed); |
| } |
| |
| |
| @Test |
| public void testIdleWaiting() throws Exception |
| { |
| final CountDownLatch idle = new CountDownLatch(1); |
| |
| TestCB cb=new TestCB() |
| { |
| int i=5; |
| |
| @Override |
| protected Action process() |
| { |
| processed++; |
| |
| switch(i--) |
| { |
| case 5: |
| succeeded(); |
| return Action.SCHEDULED; |
| |
| case 4: |
| scheduler.schedule(successTask,5,TimeUnit.MILLISECONDS); |
| return Action.SCHEDULED; |
| |
| case 3: |
| scheduler.schedule(new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| idle.countDown(); |
| } |
| },5,TimeUnit.MILLISECONDS); |
| return Action.IDLE; |
| |
| case 2: |
| succeeded(); |
| return Action.SCHEDULED; |
| |
| case 1: |
| scheduler.schedule(successTask,5,TimeUnit.MILLISECONDS); |
| return Action.SCHEDULED; |
| |
| case 0: |
| return Action.SUCCEEDED; |
| |
| default: |
| throw new IllegalStateException(); |
| |
| } |
| } |
| }; |
| |
| cb.iterate(); |
| idle.await(10,TimeUnit.SECONDS); |
| Assert.assertTrue(cb.isIdle()); |
| |
| cb.iterate(); |
| Assert.assertTrue(cb.waitForComplete()); |
| Assert.assertEquals(6,cb.processed); |
| } |
| |
| |
| |
| private abstract static class TestCB extends IteratingCallback |
| { |
| CountDownLatch completed = new CountDownLatch(1); |
| int processed=0; |
| |
| @Override |
| protected void onCompleteSuccess() |
| { |
| completed.countDown(); |
| } |
| |
| @Override |
| public void onCompleteFailure(Throwable x) |
| { |
| completed.countDown(); |
| } |
| |
| boolean waitForComplete() throws InterruptedException |
| { |
| completed.await(10,TimeUnit.SECONDS); |
| return isSucceeded(); |
| } |
| |
| Runnable successTask = new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| succeeded(); |
| } |
| }; |
| Runnable failTask = new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| failed(new Exception("testing failure")); |
| } |
| }; |
| } |
| |
| } |