| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 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.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class IteratingCallbackTest |
| { |
| private Scheduler scheduler; |
| |
| @Before |
| public void prepare() throws Exception |
| { |
| scheduler = new ScheduledExecutorScheduler(); |
| scheduler.start(); |
| } |
| |
| @After |
| public void dispose() 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 testWaitingProcessSpuriousIterate() 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); |
| } |
| |
| @Test |
| public void testCloseDuringProcessingReturningScheduled() throws Exception |
| { |
| testCloseDuringProcessing(IteratingCallback.Action.SCHEDULED); |
| } |
| |
| @Test |
| public void testCloseDuringProcessingReturningSucceeded() throws Exception |
| { |
| testCloseDuringProcessing(IteratingCallback.Action.SUCCEEDED); |
| } |
| |
| private void testCloseDuringProcessing(final IteratingCallback.Action action) throws Exception |
| { |
| final CountDownLatch failureLatch = new CountDownLatch(1); |
| IteratingCallback callback = new IteratingCallback() |
| { |
| @Override |
| protected Action process() throws Exception |
| { |
| close(); |
| return action; |
| } |
| |
| @Override |
| protected void onCompleteFailure(Throwable cause) |
| { |
| failureLatch.countDown(); |
| } |
| }; |
| |
| callback.iterate(); |
| |
| Assert.assertTrue(failureLatch.await(5, TimeUnit.SECONDS)); |
| } |
| |
| private abstract static class TestCB extends IteratingCallback |
| { |
| protected Runnable successTask = new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| succeeded(); |
| } |
| }; |
| protected Runnable failTask = new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| failed(new Exception("testing failure")); |
| } |
| }; |
| protected CountDownLatch completed = new CountDownLatch(1); |
| protected 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(); |
| } |
| } |
| } |