/**
* (c) Copyright 2014 WibiData, Inc.
*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
* Licensed 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.kiji.schema.zookeeper;
import java.util.concurrent.TimeUnit;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.api.transaction.CuratorTransactionFinal;
import org.apache.curator.framework.recipes.nodes.PersistentEphemeralNode;
import org.apache.curator.framework.recipes.nodes.PersistentEphemeralNode.Mode;
import org.apache.zookeeper.KeeperException.NoNodeException;
import org.apache.zookeeper.KeeperException.NotEmptyException;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.kiji.schema.KijiURI;
import org.kiji.schema.util.ZooKeeperTest;
/**
* Unit tests for {@link ZooKeeperUtils}.
*/
public class TestZooKeeperUtils extends ZooKeeperTest {
private static final Logger LOG = LoggerFactory.getLogger(TestZooKeeperUtils.class);
private volatile CuratorFramework mZKClient;
@Before
public void setUpTestZooKeeperUtils() throws Exception {
mZKClient = ZooKeeperUtils.getZooKeeperClient(getZKAddress());
}
@After
public void tearDownTestZooKeeperUtils() throws Exception {
mZKClient.close();
}
@Test
public void testAtomicRecursiveDelete() throws Exception {
final String path = "/foo/bar/baz/faz/fooz";
mZKClient.create().creatingParentsIfNeeded().forPath(path);
ZooKeeperUtils.atomicRecursiveDelete(mZKClient, "/foo");
Assert.assertNull(mZKClient.checkExists().forPath("/foo"));
}
/**
* Tests that the atomic transaction will succeed even if there is a persistent ephemeral node
* in the tree. The persistent ephemeral node *will* return after the transaction commits.
*
* @throws Exception
*/
@Test
public void testAtomicRecursiveDeleteWithPersistentENode() throws Exception {
final String path = "/foo/bar/baz/faz/fooz";
PersistentEphemeralNode node =
new PersistentEphemeralNode(mZKClient, Mode.EPHEMERAL, path, new byte[0]);
try {
node.start();
node.waitForInitialCreate(5, TimeUnit.SECONDS);
Assert.assertTrue(ZooKeeperUtils.atomicRecursiveDelete(mZKClient, "/foo"));
Thread.sleep(1000); // Give ephemeral node time to recreate itself
Assert.assertNotNull(mZKClient.checkExists().forPath("/foo"));
} finally {
node.close();
}
}
/**
* Test that the atomic delete commit will throw NotEmptyException if there is a concurrent
* node addition in the tree. The tree will not be deleted.
*/
@Test
public void testAtomicRecusiveDeleteWithConcurrentNodeAddition() throws Exception {
final String path = "/foo/bar/baz/faz/fooz";
mZKClient.create().creatingParentsIfNeeded().forPath(path);
CuratorTransactionFinal tx =
ZooKeeperUtils.buildAtomicRecursiveDelete(mZKClient, mZKClient.inTransaction(), "/foo");
mZKClient.create().forPath("/foo/new-child");
try {
tx.commit();
} catch (NotEmptyException nee) {
// expected
}
Assert.assertNotNull(mZKClient.checkExists().forPath("/foo"));
}
/**
* Test that the atomic delete commit will throw NoNodeException if there is a concurrent
* node deletion in the tree. The tree will not be deleted.
*/
@Test
public void testAtomicRecusiveDeleteWithConcurrentNodeDeletion() throws Exception {
final String path = "/foo/bar/baz/faz/fooz";
mZKClient.create().creatingParentsIfNeeded().forPath(path);
CuratorTransactionFinal tx =
ZooKeeperUtils.buildAtomicRecursiveDelete(mZKClient, mZKClient.inTransaction(), "/foo");
mZKClient.delete().forPath(path);
try {
tx.commit(); // should throw
} catch (NoNodeException nne) {
// expected
}
Assert.assertNotNull(mZKClient.checkExists().forPath("/foo"));
}
@Test
public void testZooKeeperConnectionsAreCached() throws Exception {
final CuratorFramework other = ZooKeeperUtils.getZooKeeperClient(getZKAddress());
try {
Assert.assertTrue(mZKClient.getZookeeperClient() == other.getZookeeperClient());
} finally {
other.close();
}
}
@Test
public void testFakeURIsAreNamespaced() throws Exception {
final String namespace = "testFakeURIsAreNamespaced";
final KijiURI uri = KijiURI.newBuilder("kiji://.fake." + namespace).build();
final CuratorFramework framework = ZooKeeperUtils.getZooKeeperClient(uri);
try {
Assert.assertEquals(namespace, framework.getNamespace());
} finally {
framework.close();
}
}
}