| /** |
| * 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.curator.framework.recipes.queue; |
| |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertNull; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| import org.apache.curator.test.BaseClassForTests; |
| import org.apache.curator.test.TestingServer; |
| import org.apache.curator.test.Timing; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.junit.jupiter.api.Test; |
| |
| import java.util.NoSuchElementException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| public class TestSimpleDistributedQueue extends BaseClassForTests |
| { |
| private static abstract class QueueUser implements Runnable |
| { |
| private static final String QUEUE_PATH = "/queue"; |
| private static final int ITEM_COUNT = 10; |
| |
| protected final SimpleDistributedQueue queue; |
| private final int sleepMillis; |
| |
| public QueueUser(CuratorFramework curator, int sleepMillis) |
| { |
| this.queue = new SimpleDistributedQueue(curator, QUEUE_PATH); |
| this.sleepMillis = sleepMillis; |
| } |
| |
| @Override |
| public void run() |
| { |
| try |
| { |
| for ( int i = 0; i < ITEM_COUNT; i++ ) |
| { |
| processItem(i); |
| Thread.sleep(sleepMillis); |
| } |
| } |
| catch ( Exception e ) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| protected abstract void processItem(int itemNumber) throws Exception; |
| } |
| |
| @Test |
| public void testHangFromContainerLoss() throws Exception |
| { |
| // for CURATOR-308 |
| |
| server.close(); |
| System.setProperty("znode.container.checkIntervalMs", "100"); |
| server = new TestingServer(); |
| |
| Timing timing = new Timing().multiple(.1); |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(2); |
| executor.execute(new QueueUser(client, timing.milliseconds()) |
| { |
| @Override |
| protected void processItem(int itemNumber) throws Exception |
| { |
| System.out.println("Offering item"); |
| queue.offer(new byte[]{(byte)itemNumber}); |
| } |
| }); |
| |
| executor.execute(new QueueUser(client, timing.multiple(.5).milliseconds()) |
| { |
| @Override |
| protected void processItem(int itemNumber) throws Exception |
| { |
| System.out.println("Taking item " + itemNumber); |
| byte[] item = queue.take(); |
| if ( item == null ) |
| { |
| throw new IllegalStateException("Null result for item " + itemNumber); |
| } |
| System.out.println("Got item " + item[0]); |
| } |
| }); |
| |
| executor.shutdown(); |
| assertTrue(executor.awaitTermination((QueueUser.ITEM_COUNT * 2) * timing.milliseconds(), TimeUnit.MILLISECONDS)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| System.clearProperty("znode.container.checkIntervalMs"); |
| } |
| } |
| |
| @Test |
| public void testPollWithTimeout() throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String dir = "/testOffer1"; |
| final int num_clients = 1; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| assertNull(queueHandles[0].poll(3, TimeUnit.SECONDS)); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testOffer1() throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String dir = "/testOffer1"; |
| String testString = "Hello World"; |
| final int num_clients = 1; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| queueHandles[0].offer(testString.getBytes()); |
| |
| byte dequeuedBytes[] = queueHandles[0].remove(); |
| assertEquals(new String(dequeuedBytes), testString); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testOffer2() throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String dir = "/testOffer2"; |
| String testString = "Hello World"; |
| final int num_clients = 2; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| queueHandles[0].offer(testString.getBytes()); |
| |
| byte dequeuedBytes[] = queueHandles[1].remove(); |
| assertEquals(new String(dequeuedBytes), testString); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testTake1() throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String dir = "/testTake1"; |
| String testString = "Hello World"; |
| final int num_clients = 1; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| queueHandles[0].offer(testString.getBytes()); |
| |
| byte dequeuedBytes[] = queueHandles[0].take(); |
| assertEquals(new String(dequeuedBytes), testString); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testRemova1() throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String dir = "/testRemove1"; |
| final int num_clients = 1; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| try |
| { |
| queueHandles[0].remove(); |
| } |
| catch ( NoSuchElementException e ) |
| { |
| return; |
| } |
| assertTrue(false); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| public void createNremoveMtest(String dir, int n, int m) throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String testString = "Hello World"; |
| final int num_clients = 2; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| for ( int i = 0; i < n; i++ ) |
| { |
| String offerString = testString + i; |
| queueHandles[0].offer(offerString.getBytes()); |
| } |
| |
| byte data[] = null; |
| for ( int i = 0; i < m; i++ ) |
| { |
| data = queueHandles[1].remove(); |
| } |
| assertEquals(new String(data), testString + (m - 1)); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testRemove2() throws Exception |
| { |
| createNremoveMtest("/testRemove2", 10, 2); |
| } |
| |
| @Test |
| public void testRemove3() throws Exception |
| { |
| createNremoveMtest("/testRemove3", 1000, 1000); |
| } |
| |
| public void createNremoveMelementTest(String dir, int n, int m) throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String testString = "Hello World"; |
| final int num_clients = 2; |
| clients = new CuratorFramework[num_clients]; |
| SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| for ( int i = 0; i < n; i++ ) |
| { |
| String offerString = testString + i; |
| queueHandles[0].offer(offerString.getBytes()); |
| } |
| |
| for ( int i = 0; i < m; i++ ) |
| { |
| queueHandles[1].remove(); |
| } |
| assertEquals(new String(queueHandles[1].element()), testString + m); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testElement1() throws Exception |
| { |
| createNremoveMelementTest("/testElement1", 1, 0); |
| } |
| |
| @Test |
| public void testElement2() throws Exception |
| { |
| createNremoveMelementTest("/testElement2", 10, 2); |
| } |
| |
| @Test |
| public void testElement3() throws Exception |
| { |
| createNremoveMelementTest("/testElement3", 1000, 500); |
| } |
| |
| @Test |
| public void testElement4() throws Exception |
| { |
| createNremoveMelementTest("/testElement4", 1000, 1000 - 1); |
| } |
| |
| @Test |
| public void testTakeWait1() throws Exception |
| { |
| CuratorFramework clients[] = null; |
| try |
| { |
| String dir = "/testTakeWait1"; |
| final String testString = "Hello World"; |
| final int num_clients = 1; |
| clients = new CuratorFramework[num_clients]; |
| final SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| |
| final byte[] takeResult[] = new byte[1][]; |
| Thread takeThread = new Thread() |
| { |
| public void run() |
| { |
| try |
| { |
| takeResult[0] = queueHandles[0].take(); |
| } |
| catch ( Exception e ) |
| { |
| // ignore |
| } |
| } |
| }; |
| takeThread.start(); |
| |
| Thread.sleep(1000); |
| Thread offerThread = new Thread() |
| { |
| public void run() |
| { |
| try |
| { |
| queueHandles[0].offer(testString.getBytes()); |
| } |
| catch ( Exception e ) |
| { |
| // ignore |
| } |
| } |
| }; |
| offerThread.start(); |
| offerThread.join(); |
| |
| takeThread.join(); |
| |
| assertTrue(takeResult[0] != null); |
| assertEquals(new String(takeResult[0]), testString); |
| } |
| finally |
| { |
| closeAll(clients); |
| } |
| } |
| |
| @Test |
| public void testTakeWait2() throws Exception |
| { |
| String dir = "/testTakeWait2"; |
| final String testString = "Hello World"; |
| final int num_clients = 1; |
| final CuratorFramework clients[] = new CuratorFramework[num_clients]; |
| final SimpleDistributedQueue queueHandles[] = new SimpleDistributedQueue[num_clients]; |
| for ( int i = 0; i < clients.length; i++ ) |
| { |
| clients[i] = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| clients[i].start(); |
| queueHandles[i] = new SimpleDistributedQueue(clients[i], dir); |
| } |
| int num_attempts = 2; |
| for ( int i = 0; i < num_attempts; i++ ) |
| { |
| final byte[] takeResult[] = new byte[1][]; |
| final String threadTestString = testString + i; |
| Thread takeThread = new Thread() |
| { |
| public void run() |
| { |
| try |
| { |
| takeResult[0] = queueHandles[0].take(); |
| } |
| catch ( Exception e ) |
| { |
| // ignore |
| } |
| } |
| }; |
| takeThread.start(); |
| |
| Thread.sleep(1000); |
| Thread offerThread = new Thread() |
| { |
| public void run() |
| { |
| try |
| { |
| queueHandles[0].offer(threadTestString.getBytes()); |
| } |
| catch ( Exception e ) |
| { |
| // ignore |
| } |
| } |
| }; |
| offerThread.start(); |
| offerThread.join(); |
| |
| takeThread.join(); |
| |
| assertTrue(takeResult[0] != null); |
| assertEquals(new String(takeResult[0]), threadTestString); |
| } |
| } |
| |
| private void closeAll(CuratorFramework[] clients) |
| { |
| if ( clients != null ) |
| { |
| for ( CuratorFramework c : clients ) |
| { |
| CloseableUtils.closeQuietly(c); |
| } |
| } |
| } |
| } |