| /** |
| * 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.RetryPolicy; |
| import org.apache.curator.RetrySleeper; |
| 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.CuratorEventType; |
| import org.apache.curator.framework.api.CuratorListener; |
| import org.apache.curator.framework.state.ConnectionState; |
| import org.apache.curator.framework.state.ConnectionStateListener; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.apache.curator.test.BaseClassForTests; |
| import org.apache.curator.test.KillSession; |
| import org.apache.curator.test.TestingServer; |
| import org.apache.curator.test.Timing; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.apache.curator.utils.ZKPaths; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.data.Stat; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| import java.util.concurrent.ArrayBlockingQueue; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public class TestFrameworkEdges extends BaseClassForTests |
| { |
| private final Timing timing = new Timing(); |
| |
| @Test |
| public void testPathsFromProtectingInBackground() throws Exception |
| { |
| for ( CreateMode mode : CreateMode.values() ) |
| { |
| internalTestPathsFromProtectingInBackground(mode); |
| } |
| } |
| |
| private void internalTestPathsFromProtectingInBackground(CreateMode mode) throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), 1, new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| client.create().creatingParentsIfNeeded().forPath("/a/b/c"); |
| |
| final BlockingQueue<String> paths = new ArrayBlockingQueue<String>(2); |
| BackgroundCallback callback = new BackgroundCallback() |
| { |
| @Override |
| public void processResult(CuratorFramework client, CuratorEvent event) throws Exception |
| { |
| paths.put(event.getName()); |
| paths.put(event.getPath()); |
| } |
| }; |
| final String TEST_PATH = "/a/b/c/test-"; |
| client.create().withMode(mode).inBackground(callback).forPath(TEST_PATH); |
| |
| String name1 = paths.take(); |
| String path1 = paths.take(); |
| |
| client.close(); |
| |
| client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), 1, new RetryOneTime(1)); |
| client.start(); |
| CreateBuilderImpl createBuilder = (CreateBuilderImpl)client.create().withProtection(); |
| |
| client.create().forPath(createBuilder.adjustPath(TEST_PATH)); |
| |
| createBuilder.debugForceFindProtectedNode = true; |
| createBuilder.withMode(mode).inBackground(callback).forPath(TEST_PATH); |
| |
| String name2 = paths.take(); |
| String path2 = paths.take(); |
| |
| Assert.assertEquals(ZKPaths.getPathAndNode(name1).getPath(), ZKPaths.getPathAndNode(TEST_PATH).getPath()); |
| Assert.assertEquals(ZKPaths.getPathAndNode(name2).getPath(), ZKPaths.getPathAndNode(TEST_PATH).getPath()); |
| Assert.assertEquals(ZKPaths.getPathAndNode(path1).getPath(), ZKPaths.getPathAndNode(TEST_PATH).getPath()); |
| Assert.assertEquals(ZKPaths.getPathAndNode(path2).getPath(), ZKPaths.getPathAndNode(TEST_PATH).getPath()); |
| |
| client.delete().deletingChildrenIfNeeded().forPath("/a/b/c"); |
| client.delete().forPath("/a/b"); |
| client.delete().forPath("/a"); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void connectionLossWithBackgroundTest() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), 1, new RetryOneTime(1)); |
| try |
| { |
| final CountDownLatch latch = new CountDownLatch(1); |
| client.start(); |
| client.getZookeeperClient().blockUntilConnectedOrTimedOut(); |
| server.close(); |
| client.getChildren().inBackground |
| ( |
| new BackgroundCallback() |
| { |
| public void processResult(CuratorFramework client, CuratorEvent event) throws Exception |
| { |
| latch.countDown(); |
| } |
| } |
| ).forPath("/"); |
| Assert.assertTrue(timing.awaitLatch(latch)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testReconnectAfterLoss() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| final CountDownLatch lostLatch = new CountDownLatch(1); |
| ConnectionStateListener listener = new ConnectionStateListener() |
| { |
| @Override |
| public void stateChanged(CuratorFramework client, ConnectionState newState) |
| { |
| if ( newState == ConnectionState.LOST ) |
| { |
| lostLatch.countDown(); |
| } |
| } |
| }; |
| client.getConnectionStateListenable().addListener(listener); |
| |
| client.checkExists().forPath("/"); |
| |
| server.stop(); |
| |
| Assert.assertTrue(timing.awaitLatch(lostLatch)); |
| |
| try |
| { |
| client.checkExists().forPath("/"); |
| Assert.fail(); |
| } |
| catch ( KeeperException.ConnectionLossException e ) |
| { |
| // correct |
| } |
| |
| server.restart(); |
| client.checkExists().forPath("/"); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testGetAclNoStat() throws Exception |
| { |
| |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| try |
| { |
| client.getACL().forPath("/"); |
| } |
| catch ( NullPointerException e ) |
| { |
| Assert.fail(); |
| } |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testMissedResponseOnBackgroundESCreate() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| CreateBuilderImpl createBuilder = (CreateBuilderImpl)client.create(); |
| createBuilder.failNextCreateForTesting = true; |
| |
| final BlockingQueue<String> queue = Queues.newArrayBlockingQueue(1); |
| BackgroundCallback callback = new BackgroundCallback() |
| { |
| @Override |
| public void processResult(CuratorFramework client, CuratorEvent event) throws Exception |
| { |
| queue.put(event.getPath()); |
| } |
| }; |
| createBuilder.withProtection().withMode(CreateMode.EPHEMERAL_SEQUENTIAL).inBackground(callback).forPath("/"); |
| String ourPath = queue.poll(timing.forWaiting().seconds(), TimeUnit.SECONDS); |
| Assert.assertTrue(ourPath.startsWith(ZKPaths.makePath("/", CreateBuilderImpl.PROTECTED_PREFIX))); |
| Assert.assertFalse(createBuilder.failNextCreateForTesting); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testMissedResponseOnESCreate() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| CreateBuilderImpl createBuilder = (CreateBuilderImpl)client.create(); |
| createBuilder.failNextCreateForTesting = true; |
| String ourPath = createBuilder.withProtection().withMode(CreateMode.EPHEMERAL_SEQUENTIAL).forPath("/"); |
| Assert.assertTrue(ourPath.startsWith(ZKPaths.makePath("/", CreateBuilderImpl.PROTECTED_PREFIX))); |
| Assert.assertFalse(createBuilder.failNextCreateForTesting); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testSessionKilled() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| client.create().forPath("/sessionTest"); |
| |
| final AtomicBoolean sessionDied = new AtomicBoolean(false); |
| Watcher watcher = new Watcher() |
| { |
| @Override |
| public void process(WatchedEvent event) |
| { |
| if ( event.getState() == Event.KeeperState.Expired ) |
| { |
| sessionDied.set(true); |
| } |
| } |
| }; |
| client.checkExists().usingWatcher(watcher).forPath("/sessionTest"); |
| KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString()); |
| Assert.assertNotNull(client.checkExists().forPath("/sessionTest")); |
| Assert.assertTrue(sessionDied.get()); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testNestedCalls() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| client.getCuratorListenable().addListener |
| ( |
| new CuratorListener() |
| { |
| @Override |
| public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception |
| { |
| if ( event.getType() == CuratorEventType.EXISTS ) |
| { |
| Stat stat = client.checkExists().forPath("/yo/yo/yo"); |
| Assert.assertNull(stat); |
| |
| client.create().inBackground(event.getContext()).forPath("/what"); |
| } |
| else if ( event.getType() == CuratorEventType.CREATE ) |
| { |
| ((CountDownLatch)event.getContext()).countDown(); |
| } |
| } |
| } |
| ); |
| |
| CountDownLatch latch = new CountDownLatch(1); |
| client.checkExists().inBackground(latch).forPath("/hey"); |
| Assert.assertTrue(latch.await(10, TimeUnit.SECONDS)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testBackgroundFailure() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| final CountDownLatch latch = new CountDownLatch(1); |
| client.getConnectionStateListenable().addListener |
| ( |
| new ConnectionStateListener() |
| { |
| @Override |
| public void stateChanged(CuratorFramework client, ConnectionState newState) |
| { |
| if ( newState == ConnectionState.LOST ) |
| { |
| latch.countDown(); |
| } |
| } |
| } |
| ); |
| |
| client.checkExists().forPath("/hey"); |
| client.checkExists().inBackground().forPath("/hey"); |
| |
| server.stop(); |
| |
| client.checkExists().inBackground().forPath("/hey"); |
| Assert.assertTrue(timing.awaitLatch(latch)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testFailure() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), 100, 100, new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| client.checkExists().forPath("/hey"); |
| client.checkExists().inBackground().forPath("/hey"); |
| |
| server.stop(); |
| |
| client.checkExists().forPath("/hey"); |
| Assert.fail(); |
| } |
| catch ( KeeperException.ConnectionLossException e ) |
| { |
| // correct |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testRetry() throws Exception |
| { |
| final int MAX_RETRIES = 3; |
| |
| final CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(10)); |
| client.start(); |
| try |
| { |
| final AtomicInteger retries = new AtomicInteger(0); |
| final Semaphore semaphore = new Semaphore(0); |
| RetryPolicy policy = new RetryPolicy() |
| { |
| @Override |
| public boolean allowRetry(int retryCount, long elapsedTimeMs, RetrySleeper sleeper) |
| { |
| semaphore.release(); |
| if ( retries.incrementAndGet() == MAX_RETRIES ) |
| { |
| try |
| { |
| server.restart(); |
| } |
| catch ( Exception e ) |
| { |
| throw new Error(e); |
| } |
| } |
| try |
| { |
| sleeper.sleepFor(100, TimeUnit.MILLISECONDS); |
| } |
| catch ( InterruptedException e ) |
| { |
| Thread.currentThread().interrupt(); |
| } |
| return true; |
| } |
| }; |
| client.getZookeeperClient().setRetryPolicy(policy); |
| |
| server.stop(); |
| |
| // test foreground retry |
| client.checkExists().forPath("/hey"); |
| Assert.assertTrue(semaphore.tryAcquire(MAX_RETRIES, timing.forWaiting().seconds(), TimeUnit.SECONDS), "Remaining leases: " + semaphore.availablePermits()); |
| |
| // make sure we're reconnected |
| client.getZookeeperClient().setRetryPolicy(new RetryOneTime(100)); |
| client.checkExists().forPath("/hey"); |
| |
| client.getZookeeperClient().setRetryPolicy(policy); |
| semaphore.drainPermits(); |
| retries.set(0); |
| |
| server.stop(); |
| |
| // test background retry |
| client.checkExists().inBackground().forPath("/hey"); |
| Assert.assertTrue(semaphore.tryAcquire(MAX_RETRIES, timing.forWaiting().seconds(), TimeUnit.SECONDS), "Remaining leases: " + semaphore.availablePermits()); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testNotStarted() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| try |
| { |
| client.getData(); |
| Assert.fail(); |
| } |
| catch ( Exception e ) |
| { |
| // correct |
| } |
| catch ( Throwable e ) |
| { |
| Assert.fail("", e); |
| } |
| } |
| |
| @Test |
| public void testStopped() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| client.getData(); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| |
| try |
| { |
| client.getData(); |
| Assert.fail(); |
| } |
| catch ( Exception e ) |
| { |
| // correct |
| } |
| } |
| } |