com.linkedin.helix.TestZkClientWrapper.java Source code

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Here is the source code for com.linkedin.helix.TestZkClientWrapper.java

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/**
 * Copyright (C) 2012 LinkedIn Inc <opensource@linkedin.com>
 *
 * 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 com.linkedin.helix;

import org.I0Itec.zkclient.IZkStateListener;
import org.I0Itec.zkclient.ZkConnection;
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;

import com.linkedin.helix.manager.zk.ZNRecordSerializer;
import com.linkedin.helix.manager.zk.ZkClient;

public class TestZkClientWrapper extends ZkUnitTestBase {
    ZkClient _zkClient;

    @BeforeClass
    public void beforeClass() {
        _zkClient = new ZkClient(ZK_ADDR);
        _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() {
        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());
        try {
            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());
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}