| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase.util; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.testclassification.MiscTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.Before; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category({MiscTests.class, SmallTests.class}) |
| public class TestStealJobQueue { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestStealJobQueue.class); |
| |
| StealJobQueue<Integer> stealJobQueue; |
| BlockingQueue<Integer> stealFromQueue; |
| |
| @Before |
| public void setup() { |
| stealJobQueue = new StealJobQueue<>(Integer::compare); |
| stealFromQueue = stealJobQueue.getStealFromQueue(); |
| |
| } |
| |
| |
| @Test |
| public void testTake() throws InterruptedException { |
| stealJobQueue.offer(3); |
| stealFromQueue.offer(10); |
| stealJobQueue.offer(15); |
| stealJobQueue.offer(4); |
| assertEquals(3, stealJobQueue.take().intValue()); |
| assertEquals(4, stealJobQueue.take().intValue()); |
| assertEquals("always take from the main queue before trying to steal", 15, |
| stealJobQueue.take().intValue()); |
| assertEquals(10, stealJobQueue.take().intValue()); |
| assertTrue(stealFromQueue.isEmpty()); |
| assertTrue(stealJobQueue.isEmpty()); |
| } |
| |
| @Test |
| public void testOfferInStealQueueFromShouldUnblock() throws InterruptedException { |
| final AtomicInteger taken = new AtomicInteger(); |
| Thread consumer = new Thread() { |
| @Override |
| public void run() { |
| try { |
| Integer n = stealJobQueue.take(); |
| taken.set(n); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| }; |
| consumer.start(); |
| stealFromQueue.offer(3); |
| consumer.join(1000); |
| assertEquals(3, taken.get()); |
| consumer.interrupt(); //Ensure the consumer thread will stop. |
| } |
| |
| |
| @Test |
| public void testOfferInStealJobQueueShouldUnblock() throws InterruptedException { |
| final AtomicInteger taken = new AtomicInteger(); |
| Thread consumer = new Thread() { |
| @Override |
| public void run() { |
| try { |
| Integer n = stealJobQueue.take(); |
| taken.set(n); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| }; |
| consumer.start(); |
| stealJobQueue.offer(3); |
| consumer.join(1000); |
| assertEquals(3, taken.get()); |
| consumer.interrupt(); //Ensure the consumer thread will stop. |
| } |
| |
| |
| @Test |
| public void testPoll() throws InterruptedException { |
| stealJobQueue.offer(3); |
| stealFromQueue.offer(10); |
| stealJobQueue.offer(15); |
| stealJobQueue.offer(4); |
| assertEquals(3, stealJobQueue.poll(1, TimeUnit.SECONDS).intValue()); |
| assertEquals(4, stealJobQueue.poll(1, TimeUnit.SECONDS).intValue()); |
| assertEquals("always take from the main queue before trying to steal", 15, |
| stealJobQueue.poll(1, TimeUnit.SECONDS).intValue()); |
| assertEquals(10, stealJobQueue.poll(1, TimeUnit.SECONDS).intValue()); |
| assertTrue(stealFromQueue.isEmpty()); |
| assertTrue(stealJobQueue.isEmpty()); |
| assertNull(stealJobQueue.poll(10, TimeUnit.MILLISECONDS)); |
| } |
| |
| @Test |
| public void testPutInStealQueueFromShouldUnblockPoll() throws InterruptedException { |
| final AtomicInteger taken = new AtomicInteger(); |
| Thread consumer = new Thread() { |
| @Override |
| public void run() { |
| try { |
| Integer n = stealJobQueue.poll(3, TimeUnit.SECONDS); |
| taken.set(n); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| }; |
| consumer.start(); |
| stealFromQueue.put(3); |
| consumer.join(1000); |
| assertEquals(3, taken.get()); |
| consumer.interrupt(); //Ensure the consumer thread will stop. |
| |
| } |
| |
| |
| @Test |
| public void testAddInStealJobQueueShouldUnblockPoll() throws InterruptedException { |
| final AtomicInteger taken = new AtomicInteger(); |
| Thread consumer = new Thread() { |
| @Override |
| public void run() { |
| try { |
| Integer n = stealJobQueue.poll(3, TimeUnit.SECONDS); |
| taken.set(n); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| }; |
| consumer.start(); |
| stealJobQueue.add(3); |
| consumer.join(1000); |
| assertEquals(3, taken.get()); |
| consumer.interrupt(); //Ensure the consumer thread will stop. |
| } |
| |
| |
| @Test |
| public void testInteractWithThreadPool() throws InterruptedException { |
| StealJobQueue<Runnable> stealTasksQueue = |
| new StealJobQueue<>((r1, r2) -> ((TestTask) r1).compareTo((TestTask) r2)); |
| final CountDownLatch stealJobCountDown = new CountDownLatch(3); |
| final CountDownLatch stealFromCountDown = new CountDownLatch(3); |
| ThreadPoolExecutor stealPool = new ThreadPoolExecutor(3, 3, 1, TimeUnit.DAYS, stealTasksQueue) { |
| @Override |
| protected void afterExecute(Runnable r, Throwable t) { |
| super.afterExecute(r, t); |
| stealJobCountDown.countDown(); |
| } |
| |
| }; |
| |
| //This is necessary otherwise no worker will be running and stealing job |
| stealPool.prestartAllCoreThreads(); |
| |
| ThreadPoolExecutor stealFromPool = new ThreadPoolExecutor(3, 3, 1, TimeUnit.DAYS, |
| stealTasksQueue.getStealFromQueue()) { |
| @Override |
| protected void afterExecute(Runnable r, Throwable t) { |
| super.afterExecute(r, t); |
| stealFromCountDown.countDown(); |
| } |
| }; |
| |
| for (int i = 0; i < 4; i++) { |
| TestTask task = new TestTask(); |
| stealFromPool.execute(task); |
| } |
| |
| for (int i = 0; i < 2; i++) { |
| TestTask task = new TestTask(); |
| stealPool.execute(task); |
| } |
| |
| stealJobCountDown.await(1, TimeUnit.SECONDS); |
| stealFromCountDown.await(1, TimeUnit.SECONDS); |
| assertEquals(0, stealFromCountDown.getCount()); |
| assertEquals(0, stealJobCountDown.getCount()); |
| } |
| |
| class TestTask extends Thread implements Comparable<TestTask> { |
| @Override |
| public int compareTo(TestTask o) { |
| return 0; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| Thread.sleep(200); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| |
| } |