/**
* 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.zookeeper.test;
import java.io.IOException;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.data.Stat;
import org.junit.Assert;
import org.junit.Test;
public class StatTest extends ClientBase {
private ZooKeeper zk;
@Override
public void setUp() throws Exception {
super.setUp();
zk = createClient();
}
@Override
public void tearDown() throws Exception {
super.tearDown();
zk.close();
}
/**
* Create a new Stat, fill in dummy values trying to catch Assert.failure
* to copy in client or server code.
*
* @return a new stat with dummy values
*/
private Stat newStat() {
Stat stat = new Stat();
stat.setAversion(100);
stat.setCtime(100);
stat.setCversion(100);
stat.setCzxid(100);
stat.setDataLength(100);
stat.setEphemeralOwner(100);
stat.setMtime(100);
stat.setMzxid(100);
stat.setNumChildren(100);
stat.setPzxid(100);
stat.setVersion(100);
return stat;
}
@Test
public void testBasic()
throws IOException, KeeperException, InterruptedException
{
String name = "/foo";
zk.create(name, name.getBytes(), Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
Stat stat;
stat = newStat();
zk.getData(name, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid(), stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(0, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(0, stat.getEphemeralOwner());
Assert.assertEquals(name.length(), stat.getDataLength());
Assert.assertEquals(0, stat.getNumChildren());
}
@Test
public void testChild()
throws IOException, KeeperException, InterruptedException
{
String name = "/foo";
zk.create(name, name.getBytes(), Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
String childname = name + "/bar";
zk.create(childname, childname.getBytes(), Ids.OPEN_ACL_UNSAFE,
CreateMode.EPHEMERAL);
Stat stat;
stat = newStat();
zk.getData(name, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid() + 1, stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(1, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(0, stat.getEphemeralOwner());
Assert.assertEquals(name.length(), stat.getDataLength());
Assert.assertEquals(1, stat.getNumChildren());
stat = newStat();
zk.getData(childname, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid(), stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(0, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(zk.getSessionId(), stat.getEphemeralOwner());
Assert.assertEquals(childname.length(), stat.getDataLength());
Assert.assertEquals(0, stat.getNumChildren());
}
@Test
public void testChildren()
throws IOException, KeeperException, InterruptedException
{
String name = "/foo";
zk.create(name, name.getBytes(), Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
for(int i = 0; i < 10; i++) {
String childname = name + "/bar" + i;
zk.create(childname, childname.getBytes(), Ids.OPEN_ACL_UNSAFE,
CreateMode.EPHEMERAL);
Stat stat;
stat = newStat();
zk.getData(name, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid() + i + 1, stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(i + 1, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(0, stat.getEphemeralOwner());
Assert.assertEquals(name.length(), stat.getDataLength());
Assert.assertEquals(i + 1, stat.getNumChildren());
}
}
@Test
public void testDataSizeChange()
throws IOException, KeeperException, InterruptedException
{
String name = "/foo";
zk.create(name, name.getBytes(), Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
Stat stat;
stat = newStat();
zk.getData(name, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid(), stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(0, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(0, stat.getEphemeralOwner());
Assert.assertEquals(name.length(), stat.getDataLength());
Assert.assertEquals(0, stat.getNumChildren());
zk.setData(name, (name + name).getBytes(), -1);
stat = newStat();
zk.getData(name, false, stat);
Assert.assertNotSame(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid(), stat.getPzxid());
Assert.assertNotSame(stat.getCtime(), stat.getMtime());
Assert.assertEquals(0, stat.getCversion());
Assert.assertEquals(1, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(0, stat.getEphemeralOwner());
Assert.assertEquals(name.length() * 2, stat.getDataLength());
Assert.assertEquals(0, stat.getNumChildren());
}
}