ActiveMQ To Mongo via apache beam

Description

Demo Code

/*//from  ww  w. ja  va 2 s.c  o m
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package org.apache.beam.samples.bounded;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.beam.samples.unbounded.KafkaToCassandra;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.jms.JmsIO;
import org.apache.beam.sdk.io.jms.JmsRecord;
import org.apache.beam.sdk.io.mongodb.MongoDbIO;
import org.apache.beam.sdk.options.*;
import org.apache.beam.sdk.transforms.*;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollection;
import org.bson.Document;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.SimpleDateFormat;
import java.util.Date;

import javax.jms.ConnectionFactory;

public class ActiveMQToMongo {

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

    /**
     * Specific pipeline options.
     */
    private interface Options extends PipelineOptions {
        String GDELT_EVENTS_URL = "http://data.gdeltproject.org/events/";

        @Description("GDELT file date")
        @Default.InstanceFactory(GDELTFileFactory.class)
        String getDate();

        void setDate(String value);

        @Description("Input Path")
        String getInput();

        void setInput(String value);

        @Description("JMS server")
        @Default.String("tcp://localhost:61616")
        String getJMSServer();

        void setJMSServer(String value);

        @Description("JMS queue")
        @Default.String("gdelt")
        String getJMSQueue();

        void setJMSQueue(String value);

        @Description("Mongo Uri")
        @Default.String("mongodb://localhost:27017")
        String getMongoUri();

        void setMongoUri(String value);

        @Description("Mongo Database")
        @Default.String("gdelt")
        String getMongoDatabase();

        void setMongoDatabase(String value);

        @Description("Mongo Collection")
        @Default.String("countbylocation")
        String getMongoCollection();

        void setMongoCollection(String value);

        class GDELTFileFactory implements DefaultValueFactory<String> {
            public String create(PipelineOptions options) {
                SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
                return format.format(new Date());
            }
        }
    }

    private static String getCountry(String row) {
        String[] fields = row.split("\\t+");
        if (fields.length > 22) {
            if (fields[21].length() > 2) {
                return fields[21].substring(0, 1);
            }
            return fields[21];
        }
        return "NA";
    }

    public static void main(String[] args) throws Exception {
        Options options = PipelineOptionsFactory.fromArgs(args)
                .withValidation().as(Options.class);
        if (options.getInput() == null) {
            options.setInput(Options.GDELT_EVENTS_URL + options.getDate()
                    + ".export.CSV.zip");
        }
        LOG.info(options.toString());

        ConnectionFactory connFactory = new ActiveMQConnectionFactory(
                options.getJMSServer());
        Pipeline pipeline = Pipeline.create(options);

        // now we connect to the queue and process every event
        PCollection<String> data = pipeline.apply(
                "ReadFromJms",
                JmsIO.read().withConnectionFactory(connFactory)
                        .withQueue(options.getJMSQueue())
                        // hack to make the source unbounded, notice that this require different
                        // processing semantics
                        //                    .withMaxNumRecords(Long.MAX_VALUE)
                        .withMaxNumRecords(100)).apply("ExtractPayload",
                ParDo.of(new DoFn<JmsRecord, String>() {
                    @ProcessElement
                    public void processElement(ProcessContext c)
                            throws Exception {
                        c.output(c.element().getPayload());
                    }
                }));

        // We filter the events for a given country (IN=India) and send them to their own JMS queue
        final String country = "IN";
        PCollection<String> eventsInIndia = data.apply("FilterByCountry",
                Filter.by(new SerializableFunction<String, Boolean>() {
                    public Boolean apply(String row) {
                        return getCountry(row).equals(country);
                    }
                }));
        eventsInIndia.apply("WriteToJms", JmsIO.write()
                .withConnectionFactory(connFactory).withQueue("india"));

        // we count the events per country and register them in Mongo
        PCollection<Document> countByCountry = data
                .apply("ExtractLocation",
                        ParDo.of(new DoFn<String, String>() {
                            @ProcessElement
                            public void processElement(ProcessContext c) {
                                c.output(getCountry(c.element()));
                            }
                        }))
                .apply("FilterValidLocations",
                        Filter.by(new SerializableFunction<String, Boolean>() {
                            public Boolean apply(String input) {
                                return (!input.equals("NA")
                                        && !input.startsWith("-") && input
                                        .length() == 2);
                            }
                        }))
                .apply("CountByLocation", Count.<String> perElement())
                .apply("ConvertToJson",
                        MapElements
                                .via(new SimpleFunction<KV<String, Long>, Document>() {
                                    public Document apply(
                                            KV<String, Long> input) {
                                        return Document.parse("{\""
                                                + input.getKey() + "\": "
                                                + input.getValue() + "}");
                                    }
                                }));
        countByCountry.apply("WriteToMongo",
                MongoDbIO.write().withUri(options.getMongoUri())
                        .withDatabase(options.getMongoDatabase())
                        .withCollection(options.getMongoCollection()));
        pipeline.run();
    }

}
ActiveMQ To Mongo via apache beam - Java Big Data

Description

Demo Code

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