KafkaTest.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
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package org.apache.coheigea.camel.kafka;

import java.util.Properties;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.ZkConnection;
import org.apache.camel.spring.Main;
import org.apache.curator.test.TestingServer;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;

import kafka.admin.AdminUtils;
import kafka.admin.RackAwareMode;
import kafka.server.KafkaConfig;
import kafka.server.KafkaServerStartable;
import kafka.utils.ZKStringSerializer$;
import kafka.utils.ZkUtils;

public class KafkaTest extends org.junit.Assert {
    private static KafkaServerStartable kafkaServer;
    private static TestingServer zkServer;
    private static int port = 12345;
    
    @org.junit.BeforeClass
    public static void setup() throws Exception {
        zkServer = new TestingServer();
        
        port = Integer.parseInt(System.getProperty("kafka.port"));
        Properties props = new Properties();
        props.put("broker.id", 1);
        props.put("host.name", "localhost");
        props.put("port", port);
        props.put("log.dir", "/tmp/kafka");
        props.put("zookeeper.connect", zkServer.getConnectString());
        props.put("replica.socket.timeout.ms", "1500");
        props.put("controlled.shutdown.enable", Boolean.TRUE.toString());

        KafkaConfig config = new KafkaConfig(props);
        kafkaServer = new KafkaServerStartable(config);
        kafkaServer.startup();
        
        // Create a "test" topic
        ZkClient zkClient = new ZkClient(zkServer.getConnectString(), 30000, 30000, ZKStringSerializer$.MODULE$);

        final ZkUtils zkUtils = new ZkUtils(zkClient, new ZkConnection(zkServer.getConnectString()), false);
        AdminUtils.createTopic(zkUtils, "test", 1, 1, new Properties(), RackAwareMode.Enforced$.MODULE$);

    }
    
    @org.junit.AfterClass
    public static void cleanup() throws Exception {
        if (kafkaServer != null) {
            kafkaServer.shutdown();
        }
        if (zkServer != null) {
            zkServer.stop();
        }

    }
    
    @org.junit.Test
    public void testKafka() throws Exception {
        // Set up the Producer
        Properties producerProps = new Properties();
        producerProps.put("bootstrap.servers", "localhost:" + port);
        producerProps.put("acks", "all");
        producerProps.put("retries", 0);
        producerProps.put("batch.size", 16384);
        producerProps.put("linger.ms", 1);
        producerProps.put("buffer.memory", 33554432);
        producerProps.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        producerProps.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

        Producer<String, String> producer = new KafkaProducer<>(producerProps);
        
        // Send a message
        producer.send(new ProducerRecord<String, String>("test", "somekey", "somevalue"));
        producer.flush();

        // Start up the Camel route
        Main main = new Main();
        main.setApplicationContextUri("camel-kafka.xml");
        
        main.start();
        
        // Sleep to allow time for the demo to work
        Thread.sleep(60 * 1000);
        
        main.stop();
        
        producer.close();
    }
    
}