Kafka消息接收

q4561231

package com.paile.kafka.service.impl;
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 kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import org.apache.log4j.Logger;
import com.paile.command.MessageConsumerCommand;
import com.paile.command.receiver.message.MessageConsumerReceiver;
import com.paile.kafka.bean.MessageBean;
import com.paile.utils.others.ObjectStreamManager;
public class GroupConsumerManager {
private final ConsumerConnector consumer;
private final String topic;
private  ExecutorService executor;
private Logger logger = Logger.getLogger(GroupConsumerManager.class);
public GroupConsumerManager(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();
}
public void run(int a_numThreads)throws Exception {
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);
System.out.println(streams.size());
//
executor = Executors.newFixedThreadPool(a_numThreads);
//
for (final KafkaStream<byte[], byte[]> stream : streams) {
ConsumerIterator<byte[], byte[]> it = stream.iterator();
while(it.hasNext()){
byte[] bt = it.next().message();
try {
Object object = null;
try {
object = ObjectStreamManager.getInstance().toObject(bt);
if(object!=null&&object instanceof MessageBean){
//接收到消息 把消息封装成MessageConsumerCommand命令，交后续执行
MessageBean bean = (MessageBean) object;
MessageConsumerReceiver receiver = new MessageConsumerReceiver(bean);
MessageConsumerCommand command = new MessageConsumerCommand(receiver);
command.execute();
}
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
throw e;
}
}
}
}
private 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", "15000");
props.put("zookeeper.sync.time.ms", "2000");
props.put("auto.commit.interval.ms", "10000");
return new ConsumerConfig(props);
}
public static void main(String[] args) {
String zooKeeper = "192.168.1.101:2181";
String groupId = "pailegroup";
String topic = "paile01";
int threads = Integer.parseInt("1");
GroupConsumerManager example = new GroupConsumerManager(zooKeeper, groupId, topic);
System.out.println("--------");
try {
example.run(threads);
} catch (Exception e) {
e.printStackTrace();
}
try {
Thread.sleep(10000);
} catch (InterruptedException ie) {
}
example.shutdown();
}
}