| /** |
| * 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.ACLProvider; |
| 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.Timing; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.apache.curator.x.async.AsyncCuratorFramework; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.data.ACL; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| import java.util.ArrayList; |
| 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 |
| { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Test |
| public void testErrorListener() throws Exception |
| { |
| //The first call to the ACL provider will return a reasonable |
| //value. The second will throw an error. This is because the ACL |
| //provider is accessed prior to the backgrounding call. |
| final AtomicBoolean aclProviderCalled = new AtomicBoolean(false); |
| |
| ACLProvider badAclProvider = new ACLProvider() |
| { |
| @Override |
| public List<ACL> getDefaultAcl() |
| { |
| if(aclProviderCalled.getAndSet(true)) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| else |
| { |
| return new ArrayList<>(); |
| } |
| } |
| |
| @Override |
| public List<ACL> getAclForPath(String path) |
| { |
| if(aclProviderCalled.getAndSet(true)) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| else |
| { |
| return new ArrayList<>(); |
| } |
| } |
| }; |
| CuratorFramework client = CuratorFrameworkFactory.builder() |
| .connectString(server.getConnectString()) |
| .retryPolicy(new RetryOneTime(1)) |
| .aclProvider(badAclProvider) |
| .build(); |
| try |
| { |
| client.start(); |
| AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); |
| |
| final CountDownLatch errorLatch = new CountDownLatch(1); |
| UnhandledErrorListener listener = (message, e) -> { |
| if ( e instanceof UnsupportedOperationException ) |
| { |
| errorLatch.countDown(); |
| } |
| }; |
| async.with(listener).create().forPath("/foo"); |
| Assert.assertTrue(new Timing().awaitLatch(errorLatch)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testListenerConnectedAtStart() throws Exception |
| { |
| server.stop(); |
| |
| Timing timing = new Timing(2); |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryNTimes(0, 0)); |
| try |
| { |
| client.start(); |
| AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); |
| |
| final CountDownLatch connectedLatch = new CountDownLatch(1); |
| final AtomicBoolean firstListenerAction = new AtomicBoolean(true); |
| final AtomicReference<ConnectionState> firstListenerState = new AtomicReference<>(); |
| ConnectionStateListener listener = (client1, 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 |
| async.create().forPath("/foo"); |
| |
| server.restart(); |
| |
| 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(); |
| AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); |
| 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 = data -> |
| { |
| if ( data.getOperation().getClass().getName().contains("CreateBuilderImpl") ) |
| { |
| long now = System.currentTimeMillis(); |
| times.add(now - start.get()); |
| start.set(now); |
| latch.countDown(); |
| } |
| }; |
| |
| server.stop(); |
| async.create().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); |
| } |
| } |
| |
| /** |
| * Attempt a background operation while Zookeeper server is down. |
| * Return code must be {@link org.apache.zookeeper.KeeperException.Code#CONNECTIONLOSS} |
| */ |
| @Test |
| public void testCuratorCallbackOnError() throws Exception |
| { |
| Timing timing = new Timing(); |
| final CountDownLatch latch = new CountDownLatch(1); |
| try ( CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString()).sessionTimeoutMs(timing.session()).connectionTimeoutMs(timing.connection()).retryPolicy(new RetryOneTime(1000)).build() ) |
| { |
| client.start(); |
| AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); |
| // Stop the Zookeeper server |
| server.stop(); |
| // Attempt to retrieve children list |
| async.getChildren().forPath("/").handle((children, e) -> { |
| if ( e instanceof KeeperException.ConnectionLossException ) |
| { |
| latch.countDown(); |
| } |
| return null; |
| }); |
| // Check if the callback has been called with a correct return code |
| Assert.assertTrue(timing.awaitLatch(latch), "Callback has not been called by curator !"); |
| } |
| } |
| |
| /** |
| * 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 = (message, e) -> |
| { |
| if ( e instanceof IllegalStateException ) |
| { |
| hadIllegalStateException.set(true); |
| } |
| }; |
| client.start(); |
| AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); |
| |
| final CountDownLatch operationReadyLatch = new CountDownLatch(1); |
| ((CuratorFrameworkImpl)client).debugListener = data -> |
| { |
| try |
| { |
| operationReadyLatch.await(); |
| } |
| catch ( InterruptedException e ) |
| { |
| Thread.currentThread().interrupt(); |
| } |
| }; |
| |
| // queue a background operation that will block due to the debugListener |
| async.create().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); |
| } |
| } |
| } |