common/util/src/test/java/org/opendaylight/yangtools/util/concurrent/CountingRejectedExecutionHandlerTest.java

   1 /*
   2  * Copyright (c) 2014 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.yangtools.util.concurrent;
  10
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertTrue;
  13 import static org.junit.Assert.fail;
  14
  15 import java.util.concurrent.CountDownLatch;
  16 import java.util.concurrent.LinkedBlockingQueue;
  17 import java.util.concurrent.RejectedExecutionException;
  18 import java.util.concurrent.ThreadPoolExecutor;
  19 import java.util.concurrent.TimeUnit;
  20 import org.junit.After;
  21 import org.junit.Test;
  22 import org.opendaylight.yangtools.util.ExecutorServiceUtil;
  23 import org.opendaylight.yangtools.util.concurrent.ThreadPoolExecutorTest.Task;
  24
  25 /**
  26  * Unit tests for CountingRejectedExecutionHandler.
  27  *
  28  * @author Thomas Pantelis
  29  */
  30 public class CountingRejectedExecutionHandlerTest {
  31
  32     private ThreadPoolExecutor executor;
  33
  34     @After
  35     public void tearDown() {
  36         if (executor != null) {
  37             executor.shutdownNow();
  38         }
  39     }
  40
  41     @Test
  42     public void testCallerRunsPolicyHandler() throws InterruptedException {
  43
  44         CountDownLatch tasksRunLatch = new CountDownLatch(1);
  45         CountDownLatch blockLatch = new CountDownLatch(1);
  46
  47         executor = new ThreadPoolExecutor(1, 1, 0, TimeUnit.SECONDS,
  48                 ExecutorServiceUtil.offerFailingBlockingQueue(new LinkedBlockingQueue<>()));
  49
  50         CountingRejectedExecutionHandler countingHandler = CountingRejectedExecutionHandler.newCallerRunsPolicy();
  51         executor.setRejectedExecutionHandler(countingHandler);
  52
  53         executor.execute(new Task(tasksRunLatch, blockLatch));
  54
  55         int tasks = 5;
  56         for (int i = 0; i < tasks - 1; i++) {
  57             executor.execute(new Task(null, null, null, null, 0));
  58         }
  59
  60         assertEquals("getRejectedTaskCount", tasks - 1, countingHandler.getRejectedTaskCount());
  61
  62         blockLatch.countDown();
  63
  64         assertTrue("Tasks complete", tasksRunLatch.await(5, TimeUnit.SECONDS));
  65     }
  66
  67     @Test
  68     public void testAbortPolicyHandler() throws InterruptedException {
  69
  70         CountDownLatch tasksRunLatch = new CountDownLatch(1);
  71         CountDownLatch blockLatch = new CountDownLatch(1);
  72
  73         executor = new ThreadPoolExecutor(1, 1, 0, TimeUnit.SECONDS,
  74                 ExecutorServiceUtil.offerFailingBlockingQueue(new LinkedBlockingQueue<>()));
  75
  76         CountingRejectedExecutionHandler countingHandler = CountingRejectedExecutionHandler.newAbortPolicy();
  77         executor.setRejectedExecutionHandler(countingHandler);
  78
  79         executor.execute(new Task(tasksRunLatch, blockLatch));
  80
  81         int tasks = 5;
  82         for (int i = 0; i < tasks - 1; i++) {
  83             try {
  84                 executor.execute(new Task(null, null, null, null, 0));
  85                 fail("Expected RejectedExecutionException");
  86             } catch (RejectedExecutionException e) {
  87                 // Expected
  88             }
  89         }
  90
  91         assertEquals("getRejectedTaskCount", tasks - 1, countingHandler.getRejectedTaskCount());
  92
  93         blockLatch.countDown();
  94
  95         assertTrue("Tasks complete", tasksRunLatch.await(5, TimeUnit.SECONDS));
  96     }
  97 }