- Producer
- Consumer
- GroupConsumer
1、MqConsumerGroup.java
package com.neohope.kafka.test;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
public class MqConsumerGroup {
private final ConsumerConnector consumer;
private final String topic;
private ExecutorService executor;
private ConsumerThread[] m_Threads;
public MqConsumerGroup(String a_zookeeper, String a_groupId, String a_topic) {
consumer = kafka.consumer.Consumer.createJavaConsumerConnector(
createConsumerConfig(a_zookeeper, a_groupId));
this.topic = a_topic;
}
public void shutdown() {
if (consumer != null) consumer.shutdown();
if (executor != null) executor.shutdown();
try {
if (!executor.awaitTermination(5000, TimeUnit.MILLISECONDS)) {
System.out.println("Timed out waiting for consumer threads to shut down, exiting uncleanly");
}
} catch (InterruptedException e) {
System.out.println("Interrupted during shutdown, exiting uncleanly");
}
}
public void run(int a_numThreads) throws InterruptedException {
Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
topicCountMap.put(topic, new Integer(a_numThreads));
Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);
// now launch all the threads
//
executor = Executors.newFixedThreadPool(a_numThreads);
// now create an object to consume the messages
//
m_Threads = new ConsumerThread[a_numThreads];
int threadNumber = 0;
for (final KafkaStream stream : streams) {
m_Threads[threadNumber] = new ConsumerThread(stream, threadNumber);
executor.submit(m_Threads[threadNumber]);
threadNumber++;
}
}
public void WaitForEnd(int a_numThreads) throws InterruptedException {
boolean bEnd =false;
while(!bEnd) {
Thread.sleep(200);
for (int threadNumber = 0; threadNumber < a_numThreads; threadNumber++) {
if (m_Threads[threadNumber].m_end)
{
bEnd = true;
}
}
}
}
private static ConsumerConfig createConsumerConfig(String a_zookeeper, String a_groupId) {
Properties props = new Properties();
props.put("zookeeper.connect", a_zookeeper);
props.put("group.id", a_groupId);
props.put("zookeeper.session.timeout.ms", "400");
props.put("zookeeper.sync.time.ms", "200");
props.put("auto.commit.interval.ms", "1000");
return new ConsumerConfig(props);
}
public static void main(String[] args) throws InterruptedException {
String zooKeeper = "localhost:2181";
String groupId = "group1";
String topic = "neoTopic";
int threads = 2;
MqConsumerGroup mqcGroup = new MqConsumerGroup(zooKeeper, groupId, topic);
mqcGroup.run(threads);
mqcGroup.WaitForEnd(threads);
mqcGroup.shutdown();
}
}