org.apache.helix.TestZkClientWrapper.java Source code

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Here is the source code for org.apache.helix.TestZkClientWrapper.java

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package org.apache.helix;

/*
 * 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.
 */

import org.I0Itec.zkclient.IZkStateListener;
import org.I0Itec.zkclient.ZkConnection;
import org.apache.helix.manager.zk.ZNRecordSerializer;
import org.apache.helix.manager.zk.ZkClient;
import org.apache.helix.testutil.ZkTestBase;
import org.apache.log4j.Logger;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.testng.AssertJUnit;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class TestZkClientWrapper extends ZkTestBase {
    private static Logger LOG = Logger.getLogger(TestZkClientWrapper.class);

    ZkClient _zkClient;

    @BeforeClass
    public void beforeClass() {
        _zkClient = new ZkClient(_zkaddr);
        _zkClient.setZkSerializer(new ZNRecordSerializer());
    }

    @AfterClass
    public void afterClass() {
        _zkClient.close();
    }

    @Test()
    void testGetStat() {
        String path = "/tmp/getStatTest";
        _zkClient.deleteRecursive(path);

        Stat stat, newStat;
        stat = _zkClient.getStat(path);
        AssertJUnit.assertNull(stat);
        _zkClient.createPersistent(path, true);

        stat = _zkClient.getStat(path);
        AssertJUnit.assertNotNull(stat);

        newStat = _zkClient.getStat(path);
        AssertJUnit.assertEquals(stat, newStat);

        _zkClient.writeData(path, new ZNRecord("Test"));
        newStat = _zkClient.getStat(path);
        AssertJUnit.assertNotSame(stat, newStat);
    }

    @Test()
    void testSessioExpire() throws Exception {
        IZkStateListener listener = new IZkStateListener() {

            @Override
            public void handleStateChanged(KeeperState state) throws Exception {
                System.out.println("In Old connection New state " + state);
            }

            @Override
            public void handleNewSession() throws Exception {
                System.out.println("In Old connection New session");
            }
        };

        _zkClient.subscribeStateChanges(listener);
        ZkConnection connection = ((ZkConnection) _zkClient.getConnection());
        ZooKeeper zookeeper = connection.getZookeeper();
        System.out.println("old sessionId= " + zookeeper.getSessionId());
        Watcher watcher = new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                System.out.println("In New connection In process event:" + event);
            }
        };
        ZooKeeper newZookeeper = new ZooKeeper(connection.getServers(), zookeeper.getSessionTimeout(), watcher,
                zookeeper.getSessionId(), zookeeper.getSessionPasswd());
        Thread.sleep(3000);
        System.out.println("New sessionId= " + newZookeeper.getSessionId());
        Thread.sleep(3000);
        newZookeeper.close();
        Thread.sleep(10000);
        connection = ((ZkConnection) _zkClient.getConnection());
        zookeeper = connection.getZookeeper();
        System.out.println("After session expiry sessionId= " + zookeeper.getSessionId());
    }
}