com.springdeveloper.hadoop.hive.HiveJdbcApp.java Source code

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Here is the source code for com.springdeveloper.hadoop.hive.HiveJdbcApp.java

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/*
 * Copyright 2011-2012 the original author or authors.
 * 
 * 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.springdeveloper.hadoop.hive;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;

public class HiveJdbcApp {

    private static final Log log = LogFactory.getLog(HiveJdbcApp.class);

    public static void main(String[] args) throws Exception {
        AbstractApplicationContext context = new ClassPathXmlApplicationContext(
                "/META-INF/spring/hive-jdbc-context.xml", HiveJdbcApp.class);
        log.info("Hive JDBC Application Running");
        context.registerShutdownHook();

        String tableDdl = "create external table if not exists tweetdata (value STRING) LOCATION '/tweets/input'";
        String query = "select r.retweetedUser, '\t', count(r.retweetedUser) as count " + " from tweetdata j "
                + " lateral view json_tuple(j.value, 'retweet', 'retweetedStatus') t as retweet, retweetedStatus "
                + " lateral view json_tuple(t.retweetedStatus, 'fromUser') r as retweetedUser "
                + " where t.retweet = 'true' " + " group by r.retweetedUser order by count desc limit 10";
        String results = "insert overwrite directory '/tweets/hiveout'";

        JdbcTemplate template = context.getBean(JdbcTemplate.class);
        template.execute(tableDdl);

        template.execute(results + " " + query);

        context.close();
    }
}