org.apache.hadoop.hive.llap.LlapDump.java Source code

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Here is the source code for org.apache.hadoop.hive.llap.LlapDump.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.hadoop.hive.llap;

import java.util.Arrays;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;

import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.InputSplit;

/**
 * Utility to test query and data retrieval via the LLAP input format.
 * llapdump --hiveconf hive.zookeeper.quorum=localhost --hiveconf hive.zookeeper.client.port=2181 --hiveconf hive.llap.daemon.service.hosts=@llap_MiniLlapCluster 'select * from employee where employee_id < 10'
 *
 */
public class LlapDump {

    private static final Logger LOG = LoggerFactory.getLogger(LlapDump.class);

    private static String url = "jdbc:hive2://localhost:10000/default";
    private static String user = "hive";
    private static String pwd = "";
    private static String query = null;
    private static String numSplits = "1";

    public static void main(String[] args) throws Exception {
        Options opts = createOptions();
        CommandLine cli = new GnuParser().parse(opts, args);

        if (cli.hasOption('h')) {
            HelpFormatter formatter = new HelpFormatter();
            formatter.printHelp("llapdump", opts);
            return;
        }

        if (cli.hasOption('l')) {
            url = cli.getOptionValue("l");
        }

        if (cli.hasOption('u')) {
            user = cli.getOptionValue("u");
        }

        if (cli.hasOption('p')) {
            pwd = cli.getOptionValue("p");
        }

        if (cli.hasOption('n')) {
            numSplits = cli.getOptionValue("n");
        }

        Properties configProps = cli.getOptionProperties("hiveconf");

        if (cli.getArgs().length > 0) {
            query = cli.getArgs()[0];
        }

        if (query == null) {
            throw new IllegalArgumentException("No query string specified");
        }

        System.out.println("url: " + url);
        System.out.println("user: " + user);
        System.out.println("query: " + query);

        LlapRowInputFormat format = new LlapRowInputFormat();

        JobConf job = new JobConf();
        job.set(LlapBaseInputFormat.URL_KEY, url);
        job.set(LlapBaseInputFormat.USER_KEY, user);
        job.set(LlapBaseInputFormat.PWD_KEY, pwd);
        job.set(LlapBaseInputFormat.QUERY_KEY, query);

        // Additional conf settings specified on the command line
        for (String key : configProps.stringPropertyNames()) {
            job.set(key, configProps.getProperty(key));
        }

        InputSplit[] splits = format.getSplits(job, Integer.parseInt(numSplits));

        if (splits.length == 0) {
            System.out.println("No splits returned - empty scan");
            System.out.println("Results: ");
        } else {
            boolean first = true;

            for (InputSplit s : splits) {
                LOG.info("Processing input split s from " + Arrays.toString(s.getLocations()));
                RecordReader<NullWritable, Row> reader = format.getRecordReader(s, job, null);

                if (reader instanceof LlapRowRecordReader && first) {
                    Schema schema = ((LlapRowRecordReader) reader).getSchema();
                    System.out.println("" + schema);
                }

                if (first) {
                    System.out.println("Results: ");
                    System.out.println("");
                    first = false;
                }

                Row value = reader.createValue();
                while (reader.next(NullWritable.get(), value)) {
                    printRow(value);
                }
            }
            System.exit(0);
        }
    }

    private static void printRow(Row row) {
        Schema schema = row.getSchema();
        StringBuilder sb = new StringBuilder();
        int length = schema.getColumns().size();
        for (int idx = 0; idx < length; ++idx) {
            sb.append(row.getValue(idx));
            if (idx != length - 1) {
                sb.append(", ");
            }
        }
        System.out.println(sb.toString());
    }

    static Options createOptions() {
        Options result = new Options();

        result.addOption(OptionBuilder.withLongOpt("location").withDescription("HS2 url").hasArg().create('l'));

        result.addOption(OptionBuilder.withLongOpt("user").withDescription("user name").hasArg().create('u'));

        result.addOption(OptionBuilder.withLongOpt("pwd").withDescription("password").hasArg().create('p'));

        result.addOption(OptionBuilder.withLongOpt("num").withDescription("number of splits").hasArg().create('n'));

        result.addOption(OptionBuilder.withValueSeparator().hasArgs(2).withArgName("property=value")
                .withLongOpt("hiveconf").withDescription("Use value for given property").create());

        result.addOption(OptionBuilder.withLongOpt("help").withDescription("help").hasArg(false).create('h'));

        return result;
    }
}