HBase To HBase via apache beam - Java Big Data

Java examples for Big Data:HBase

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Description

HBase To HBase via apache beam

Demo Code

/*/*from  w  ww. j  a v  a  2 s  . co  m*/
 * 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
 *
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 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.beam.samples.ingest;

import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.hbase.HBaseIO;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.MapElements;
import org.apache.beam.sdk.transforms.SimpleFunction;
import org.apache.beam.sdk.values.KV;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HBaseToHBase {

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

    /**
     * Specific pipeline options.
     */
    private interface Options extends PipelineOptions {
        @Description("Input Path")
        String getInput();

        void setInput(String value);

        @Description("Output Path")
        String getOutput();

        void setOutput(String value);
    }

    public static void main(String[] args) {
        Options options = PipelineOptionsFactory.fromArgs(args)
                .withValidation().as(Options.class);
        LOG.info(options.toString());

        final Configuration conf = HBaseConfiguration.create();

        Pipeline pipeline = Pipeline.create(options);
        pipeline.apply("ReadFromGDELTFile",
                TextIO.read().from(options.getInput()))
                .apply("ConvertToKV",
                        MapElements
                                .via(new SimpleFunction<String, KV<String, String>>() {
                                    @Override
                                    public KV<String, String> apply(
                                            String input) {
                                        String key = "";
                                        //TODO
                                        return KV.of(key, input);
                                    }
                                }))
                .apply("ToHBaseMutation",
                        MapElements
                                .via(new SimpleFunction<KV<String, String>, KV<byte[], Iterable<Mutation>>>() {
                                    @Override
                                    public KV<byte[], Iterable<Mutation>> apply(
                                            KV<String, String> input) {
                                        return makeWrite(input.getKey(),
                                                input.getValue());
                                    }
                                }))
                .apply(HBaseIO.write().withConfiguration(conf)
                        .withTableId(options.getInput()));

        pipeline.run();
    }

    private static KV<byte[], Iterable<Mutation>> makeWrite(String key,
            String value) {
        byte[] rowKey = key.getBytes(StandardCharsets.UTF_8);
        List<Mutation> mutations = new ArrayList<>();
        mutations.add(makeMutation(key, value));
        return KV.of(rowKey, (Iterable<Mutation>) mutations);
    }

    private static Mutation makeMutation(String key, String value) {
        byte[] rowKey = key.getBytes(StandardCharsets.UTF_8);
        return new Put(rowKey).addColumn(COLUMN_FAMILY, COLUMN_NAME,
                Bytes.toBytes(value)).addColumn(COLUMN_FAMILY,
                COLUMN_EMAIL, Bytes.toBytes(value + "@email.com"));
    }

    private static final byte[] COLUMN_FAMILY = Bytes.toBytes("info");
    private static final byte[] COLUMN_NAME = Bytes.toBytes("name");
    private static final byte[] COLUMN_EMAIL = Bytes.toBytes("email");
}

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