SparkStreamingPulsarReceiverExample.java

/**
 * Copyright 2016 Yahoo Inc.
 *
 * 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.yahoo.pulsar.spark.example;

import com.yahoo.pulsar.client.api.Message;
import com.yahoo.pulsar.spark.SparkStreamingPulsarReceiver;

import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.FlatMapFunction;
import org.apache.spark.api.java.function.Function2;
import org.apache.spark.streaming.Durations;
import org.apache.spark.streaming.api.java.JavaStreamingContext;
import org.apache.spark.streaming.api.java.JavaReceiverInputDStream;
import org.apache.spark.streaming.api.java.JavaDStream;

import com.yahoo.pulsar.client.api.ClientConfiguration;
import com.yahoo.pulsar.client.api.ConsumerConfiguration;

import java.util.Iterator;
import java.util.Arrays;

public class SparkStreamingPulsarReceiverExample {
    public static void main(String[] args) throws InterruptedException {
        SparkConf conf = new SparkConf().setMaster("local[*]").setAppName("pulsar-spark");
        JavaStreamingContext jssc = new JavaStreamingContext(conf, Durations.seconds(5));

        ClientConfiguration clientConf = new ClientConfiguration();
        ConsumerConfiguration consConf = new ConsumerConfiguration();
        String url = "pulsar://localhost:6650/";
        String topic = "persistent://sample/standalone/ns1/topic1";
        String subs = "sub1";

        JavaReceiverInputDStream<byte[]> msgs = jssc
                .receiverStream(new SparkStreamingPulsarReceiver(clientConf, consConf, url, topic, subs));

        JavaDStream<Integer> isContainingPulsar = msgs.flatMap(new FlatMapFunction<byte[], Integer>() {
            @Override
            public Iterator<Integer> call(byte[] msg) {
                return Arrays.asList(((new String(msg)).indexOf("Pulsar") != -1) ? 1 : 0).iterator();
            }
        });

        JavaDStream<Integer> numOfPulsar = isContainingPulsar.reduce(new Function2<Integer, Integer, Integer>() {
            @Override
            public Integer call(Integer i1, Integer i2) {
                return i1 + i2;
            }
        });

        numOfPulsar.print();

        jssc.start();
        jssc.awaitTermination();
    }
}