org.apache.sqoop.test.hadoop.HadoopMiniClusterRunner.java Source code

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Here is the source code for org.apache.sqoop.test.hadoop.HadoopMiniClusterRunner.java

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/**
 * 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.sqoop.test.hadoop;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.log4j.Logger;

/**
 * Represents a minicluster setup.
 * It creates a configuration object and mutates it.
 * Clients that need to connect to the miniclusters should use
 * the provided configuration object.
 */
public class HadoopMiniClusterRunner extends HadoopRunner {
    private static final Logger LOG = Logger.getLogger(HadoopMiniClusterRunner.class);

    /**
     * Hadoop HDFS cluster
     */
    protected MiniDFSCluster dfsCluster;

    /**
     * Hadoop MR cluster
     */
    protected MiniMRCluster mrCluster;

    @Override
    public Configuration prepareConfiguration(Configuration config) {
        config.set("dfs.block.access.token.enable", "false");
        config.set("dfs.permissions", "true");
        config.set("hadoop.security.authentication", "simple");
        config.set("mapred.tasktracker.map.tasks.maximum", "1");
        config.set("mapred.tasktracker.reduce.tasks.maximum", "1");
        config.set("mapred.submit.replication", "1");
        config.set("yarn.resourcemanager.scheduler.class",
                "org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler");
        config.set("yarn.application.classpath", System.getProperty("java.class.path"));
        return config;
    }

    @SuppressWarnings("deprecation")
    @Override
    public void start() throws Exception {
        System.setProperty("test.build.data", getDataDir());
        LOG.info("test.build.data set to: " + getDataDir());

        System.setProperty("hadoop.log.dir", getLogDir());
        LOG.info("log dir set to: " + getLogDir());

        // Start DFS server
        LOG.info("Starting DFS cluster...");
        dfsCluster = new MiniDFSCluster(config, 1, true, null);
        if (dfsCluster.isClusterUp()) {
            LOG.info("Started DFS cluster on port: " + dfsCluster.getNameNodePort());
        } else {
            LOG.error("Could not start DFS cluster");
        }

        // Start MR server
        LOG.info("Starting MR cluster");
        mrCluster = new MiniMRCluster(0, 0, 1, dfsCluster.getFileSystem().getUri().toString(), 1, null, null, null,
                new JobConf(config));
        LOG.info("Started MR cluster");
        config = prepareConfiguration(mrCluster.createJobConf());
    }

    @Override
    public void stop() throws Exception {
        LOG.info("Stopping MR cluster");
        mrCluster.shutdown();
        LOG.info("Stopped MR cluster");

        LOG.info("Stopping DFS cluster");
        dfsCluster.shutdown();
        LOG.info("Stopped DFS cluster");
    }
}