| /** |
| * 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.imps; |
| |
| import com.google.common.collect.Lists; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.framework.api.BackgroundCallback; |
| import org.apache.curator.framework.api.CuratorEvent; |
| import org.apache.curator.framework.api.UnhandledErrorListener; |
| import org.apache.curator.framework.state.ConnectionState; |
| import org.apache.curator.framework.state.ConnectionStateListener; |
| import org.apache.curator.retry.RetryNTimes; |
| import org.apache.curator.retry.RetryOneTime; |
| 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.zookeeper.KeeperException.Code; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| public class TestFrameworkBackground extends BaseClassForTests |
| { |
| @Test |
| public void testListenerConnectedAtStart() throws Exception |
| { |
| server.close(); |
| |
| Timing timing = new Timing(2); |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryNTimes(0, 0)); |
| try |
| { |
| client.start(); |
| |
| final CountDownLatch connectedLatch = new CountDownLatch(1); |
| final AtomicBoolean firstListenerAction = new AtomicBoolean(true); |
| final AtomicReference<ConnectionState> firstListenerState = new AtomicReference<ConnectionState>(); |
| ConnectionStateListener listener = new ConnectionStateListener() |
| { |
| @Override |
| public void stateChanged(CuratorFramework client, ConnectionState newState) |
| { |
| if ( firstListenerAction.compareAndSet(true, false) ) |
| { |
| firstListenerState.set(newState); |
| System.out.println("First listener state is " + newState); |
| } |
| if ( newState == ConnectionState.CONNECTED ) |
| { |
| connectedLatch.countDown(); |
| } |
| } |
| }; |
| client.getConnectionStateListenable().addListener(listener); |
| |
| // due to CURATOR-72, this was causing a LOST event to precede the CONNECTED event |
| client.create().inBackground().forPath("/foo"); |
| |
| server = new TestingServer(server.getPort()); |
| |
| Assert.assertTrue(timing.awaitLatch(connectedLatch)); |
| Assert.assertFalse(firstListenerAction.get()); |
| ConnectionState firstconnectionState = firstListenerState.get(); |
| Assert.assertEquals(firstconnectionState, ConnectionState.CONNECTED, "First listener state MUST BE CONNECTED but is " + firstconnectionState); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testRetries() throws Exception |
| { |
| final int SLEEP = 1000; |
| final int TIMES = 5; |
| |
| Timing timing = new Timing(); |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryNTimes(TIMES, SLEEP)); |
| try |
| { |
| client.start(); |
| client.getZookeeperClient().blockUntilConnectedOrTimedOut(); |
| |
| final CountDownLatch latch = new CountDownLatch(TIMES); |
| final List<Long> times = Lists.newArrayList(); |
| final AtomicLong start = new AtomicLong(System.currentTimeMillis()); |
| ((CuratorFrameworkImpl)client).debugListener = new CuratorFrameworkImpl.DebugBackgroundListener() |
| { |
| @Override |
| public void listen(OperationAndData<?> data) |
| { |
| if ( data.getOperation().getClass().getName().contains("CreateBuilderImpl") ) |
| { |
| long now = System.currentTimeMillis(); |
| times.add(now - start.get()); |
| start.set(now); |
| latch.countDown(); |
| } |
| } |
| }; |
| |
| server.stop(); |
| client.create().inBackground().forPath("/one"); |
| |
| latch.await(); |
| |
| for ( long elapsed : times.subList(1, times.size()) ) // first one isn't a retry |
| { |
| Assert.assertTrue(elapsed >= SLEEP, elapsed + ": " + times); |
| } |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testBasic() throws Exception |
| { |
| Timing timing = new Timing(); |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| final CountDownLatch latch = new CountDownLatch(3); |
| final List<String> paths = Lists.newArrayList(); |
| BackgroundCallback callback = new BackgroundCallback() |
| { |
| @Override |
| public void processResult(CuratorFramework client, CuratorEvent event) throws Exception |
| { |
| paths.add(event.getPath()); |
| latch.countDown(); |
| } |
| }; |
| client.create().inBackground(callback).forPath("/one"); |
| client.create().inBackground(callback).forPath("/one/two"); |
| client.create().inBackground(callback).forPath("/one/two/three"); |
| |
| latch.await(); |
| |
| Assert.assertEquals(paths, Arrays.asList("/one", "/one/two", "/one/two/three")); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| /** |
| * Attempt a background operation while Zookeeper server is down. |
| * Return code must be {@link Code#CONNECTIONLOSS} |
| */ |
| @Test |
| public void testCuratorCallbackOnError() throws Exception |
| { |
| Timing timing = new Timing(); |
| CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString()).sessionTimeoutMs(timing.session()).connectionTimeoutMs(timing.connection()).retryPolicy(new RetryOneTime(1000)).build(); |
| final CountDownLatch latch = new CountDownLatch(1); |
| try |
| { |
| client.start(); |
| BackgroundCallback curatorCallback = new BackgroundCallback() |
| { |
| |
| @Override |
| public void processResult(CuratorFramework client, CuratorEvent event) throws Exception |
| { |
| if ( event.getResultCode() == Code.CONNECTIONLOSS.intValue() ) |
| { |
| latch.countDown(); |
| } |
| } |
| }; |
| // Stop the Zookeeper server |
| server.stop(); |
| // Attempt to retrieve children list |
| client.getChildren().inBackground(curatorCallback).forPath("/"); |
| // Check if the callback has been called with a correct return code |
| Assert.assertTrue(timing.awaitLatch(latch), "Callback has not been called by curator !"); |
| } |
| finally |
| { |
| client.close(); |
| } |
| |
| } |
| |
| /** |
| * CURATOR-126 |
| * Shutdown the Curator client while there are still background operations running. |
| */ |
| @Test |
| public void testShutdown() throws Exception |
| { |
| Timing timing = new Timing(); |
| CuratorFramework client = CuratorFrameworkFactory |
| .builder() |
| .connectString(server.getConnectString()) |
| .sessionTimeoutMs(timing.session()) |
| .connectionTimeoutMs(timing.connection()).retryPolicy(new RetryOneTime(1)) |
| .maxCloseWaitMs(timing.forWaiting().milliseconds()) |
| .build(); |
| try |
| { |
| final AtomicBoolean hadIllegalStateException = new AtomicBoolean(false); |
| ((CuratorFrameworkImpl)client).debugUnhandledErrorListener = new UnhandledErrorListener() |
| { |
| @Override |
| public void unhandledError(String message, Throwable e) |
| { |
| if ( e instanceof IllegalStateException ) |
| { |
| hadIllegalStateException.set(true); |
| } |
| } |
| }; |
| client.start(); |
| |
| final CountDownLatch operationReadyLatch = new CountDownLatch(1); |
| ((CuratorFrameworkImpl)client).debugListener = new CuratorFrameworkImpl.DebugBackgroundListener() |
| { |
| @Override |
| public void listen(OperationAndData<?> data) |
| { |
| try |
| { |
| operationReadyLatch.await(); |
| } |
| catch ( InterruptedException e ) |
| { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| }; |
| |
| // queue a background operation that will block due to the debugListener |
| client.create().inBackground().forPath("/hey"); |
| timing.sleepABit(); |
| |
| // close the client while the background is still blocked |
| client.close(); |
| |
| // unblock the background |
| operationReadyLatch.countDown(); |
| timing.sleepABit(); |
| |
| // should not generate an exception |
| Assert.assertFalse(hadIllegalStateException.get()); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| |
| } |