org.apache.whirr.service.cdh.integration.CdhZooKeeperServiceTest.java Source code

Introduction

Here is the source code for org.apache.whirr.service.cdh.integration.CdhZooKeeperServiceTest.java

Source

/**
 * 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.whirr.service.cdh.integration;

import org.apache.commons.configuration.CompositeConfiguration;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.whirr.Cluster;
import org.apache.whirr.ClusterController;
import org.apache.whirr.ClusterSpec;
import org.apache.whirr.TestConstants;
import org.apache.whirr.service.zookeeper.ZooKeeperCluster;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;

import static junit.framework.Assert.assertEquals;

public class CdhZooKeeperServiceTest {

    private ClusterSpec clusterSpec;
    private Cluster cluster;
    private ClusterController controller;
    private String hosts;

    @Before
    public void setUp() throws Exception {
        CompositeConfiguration config = new CompositeConfiguration();
        if (System.getProperty("config") != null) {
            config.addConfiguration(new PropertiesConfiguration(System.getProperty("config")));
        }
        config.addConfiguration(new PropertiesConfiguration("whirr-zookeeper-cdh-test.properties"));
        clusterSpec = ClusterSpec.withTemporaryKeys(config);
        controller = new ClusterController();

        cluster = controller.launchCluster(clusterSpec);
        hosts = ZooKeeperCluster.getHosts(cluster);
    }

    @Test(timeout = TestConstants.ITEST_TIMEOUT)
    public void test() throws Exception {
        class ConnectionWatcher implements Watcher {

            private ZooKeeper zk;
            private CountDownLatch latch = new CountDownLatch(1);

            public void connect(String hosts) throws IOException, InterruptedException {
                zk = new ZooKeeper(hosts, 5000, this);
                latch.await();
            }

            public ZooKeeper getZooKeeper() {
                return zk;
            }

            @Override
            public void process(WatchedEvent event) {
                if (event.getState() == KeeperState.SyncConnected) {
                    latch.countDown();
                }
            }

            public void close() throws InterruptedException {
                if (zk != null) {
                    zk.close();
                }
            }

        }

        String path = "/data";
        String data = "Hello";
        ConnectionWatcher watcher = new ConnectionWatcher();
        watcher.connect(hosts);
        watcher.getZooKeeper().create(path, data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
        watcher.close();

        watcher = new ConnectionWatcher();
        watcher.connect(hosts);
        byte[] actualData = watcher.getZooKeeper().getData(path, false, null);
        assertEquals(data, new String(actualData));
        watcher.close();
    }

    @After
    public void tearDown() throws IOException, InterruptedException {
        controller.destroyCluster(clusterSpec);
    }

}