| /** |
| * 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.Queues; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.framework.state.ConnectionState; |
| import org.apache.curator.framework.state.ConnectionStateListener; |
| import org.apache.curator.retry.ExponentialBackoffRetry; |
| import org.apache.curator.retry.RetryNTimes; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.apache.curator.test.BaseClassForTests; |
| import org.apache.curator.test.InstanceSpec; |
| import org.apache.curator.test.TestingCluster; |
| import org.apache.curator.test.Timing; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.testng.Assert; |
| import org.testng.annotations.AfterMethod; |
| import org.testng.annotations.BeforeMethod; |
| import org.testng.annotations.Test; |
| import java.util.Iterator; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| public class TestReadOnly extends BaseClassForTests |
| { |
| @BeforeMethod |
| public void setup() |
| { |
| System.setProperty("readonlymode.enabled", "true"); |
| } |
| |
| @AfterMethod |
| public void tearDown() |
| { |
| System.setProperty("readonlymode.enabled", "false"); |
| } |
| |
| @Test |
| public void testConnectionStateNewClient() throws Exception |
| { |
| Timing timing = new Timing(); |
| CuratorFramework client = null; |
| TestingCluster cluster = createAndStartCluster(3); |
| try |
| { |
| client = CuratorFrameworkFactory.newClient(cluster.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(100)); |
| client.start(); |
| client.checkExists().forPath("/"); |
| client.close(); |
| client = null; |
| |
| Iterator<InstanceSpec> iterator = cluster.getInstances().iterator(); |
| for ( int i = 0; i < 2; ++i ) |
| { |
| cluster.killServer(iterator.next()); |
| } |
| |
| client = CuratorFrameworkFactory.builder() |
| .connectString(cluster.getConnectString()) |
| .sessionTimeoutMs(timing.session()) |
| .connectionTimeoutMs(timing.connection()) |
| .retryPolicy(new RetryNTimes(3, timing.milliseconds())) |
| .canBeReadOnly(true) |
| .build(); |
| |
| final BlockingQueue<ConnectionState> states = Queues.newLinkedBlockingQueue(); |
| client.getConnectionStateListenable().addListener |
| ( |
| new ConnectionStateListener() |
| { |
| @Override |
| public void stateChanged(CuratorFramework client, ConnectionState newState) |
| { |
| states.add(newState); |
| } |
| } |
| ); |
| client.start(); |
| |
| client.checkExists().forPath("/"); |
| |
| ConnectionState state = states.poll(timing.forWaiting().milliseconds(), TimeUnit.MILLISECONDS); |
| Assert.assertEquals(state, ConnectionState.READ_ONLY); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| CloseableUtils.closeQuietly(cluster); |
| } |
| } |
| |
| @Test |
| public void testReadOnly() throws Exception |
| { |
| Timing timing = new Timing(); |
| |
| CuratorFramework client = null; |
| TestingCluster cluster = createAndStartCluster(2); |
| try |
| { |
| client = CuratorFrameworkFactory.builder().connectString(cluster.getConnectString()).canBeReadOnly(true).connectionTimeoutMs(timing.connection()).sessionTimeoutMs(timing.session()).retryPolicy(new ExponentialBackoffRetry(100, 3)).build(); |
| client.start(); |
| |
| client.create().forPath("/test"); |
| |
| final CountDownLatch readOnlyLatch = new CountDownLatch(1); |
| final CountDownLatch reconnectedLatch = new CountDownLatch(1); |
| ConnectionStateListener listener = new ConnectionStateListener() |
| { |
| @Override |
| public void stateChanged(CuratorFramework client, ConnectionState newState) |
| { |
| if ( newState == ConnectionState.READ_ONLY ) |
| { |
| readOnlyLatch.countDown(); |
| } |
| else if ( newState == ConnectionState.RECONNECTED ) |
| { |
| reconnectedLatch.countDown(); |
| } |
| } |
| }; |
| client.getConnectionStateListenable().addListener(listener); |
| |
| InstanceSpec ourInstance = cluster.findConnectionInstance(client.getZookeeperClient().getZooKeeper()); |
| Iterator<InstanceSpec> iterator = cluster.getInstances().iterator(); |
| InstanceSpec killInstance = iterator.next(); |
| if ( killInstance.equals(ourInstance) ) |
| { |
| killInstance = iterator.next(); // kill the instance we're not connected to |
| } |
| cluster.killServer(killInstance); |
| |
| Assert.assertEquals(reconnectedLatch.getCount(), 1); |
| Assert.assertTrue(timing.awaitLatch(readOnlyLatch)); |
| |
| Assert.assertEquals(reconnectedLatch.getCount(), 1); |
| cluster.restartServer(killInstance); |
| Assert.assertTrue(timing.awaitLatch(reconnectedLatch)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| CloseableUtils.closeQuietly(cluster); |
| } |
| } |
| |
| @Override |
| protected void createServer() throws Exception |
| { |
| // NOP |
| } |
| } |