PHP 入門: PHP と Flink

<?php
require_once('./vendor/autoload.php');

$conf = new RdKafkaConf();
$conf->set('metadata.broker.list', 'localhost:9092');

$producer = new RdKafkaProducer($conf);
$producer->addBrokers('localhost:9092');

$topic = $producer->newTopic('logs');

$message = 'This is a log message';
$topic->produce(RD_KAFKA_PARTITION_UA, 0, $message);

echo 'Message sent to Kafka
';

package com.example.flink;

import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;

import java.util.Properties;

public class SimpleFlinkJob {

    public static void main(String[] args) throws Exception {

        // set up the streaming execution environment
        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        // set up Kafka consumer properties and create a consumer
        Properties properties = new Properties();
        properties.setProperty("bootstrap.servers", "localhost:9092");
        properties.setProperty("group.id", "test");

        FlinkKafkaConsumer<String> consumer = new FlinkKafkaConsumer<>("logs", new SimpleStringSchema(), properties);

        // get the data stream from Kafka
        DataStream<String> input = env.addSource(consumer);

        // map the data stream to uppercase
        DataStream<String> output = input.map(String::toUpperCase);

        // print the result
        output.print();

        // execute the Flink job
        env.execute("Simple Flink Job");
    }
}

<?php
require_once('./vendor/autoload.php');

use GuzzleHttpClient;

// create a new HTTP client for connecting to Flink REST API
$client = new Client([
    'base_uri' => 'http://localhost:8081',
]);

// request the list of running Flink jobs
$response = $client->get('/jobs/overview');

// output the status of each Flink job
foreach (json_decode($response->getBody()) as $job) {
    echo "{$job->name}: {$job->state}
";
}

Simple Flink Job: RUNNING
THIS IS A LOG MESSAGE