Kafka实例Kafka实例

package com.lin.demo.consumer; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Properties; import kafka.consumer.ConsumerConfig; import kafka.consumer.ConsumerIterator; import kafka.consumer.KafkaStream; import kafka.javaapi.consumer.ConsumerConnector; import kafka.serializer.StringDecoder; import kafka.utils.VerifiableProperties; import com.lin.demo.producer.KafkaProducer; public class KafkaConsumer { private final ConsumerConnector consumer; private KafkaConsumer() { Properties props = new Properties(); // zookeeper 配置 props.put("zookeeper.connect", "127.0.0.1:2181"); // group 代表一个消费组 props.put("group.id", "lingroup"); // zk连接超时 props.put("zookeeper.session.timeout.ms", "4000"); props.put("zookeeper.sync.time.ms", "200"); props.put("rebalance.max.retries", "5"); props.put("rebalance.backoff.ms", "1200"); props.put("auto.commit.interval.ms", "1000"); props.put("auto.offset.reset", "smallest"); // 序列化类 props.put("serializer.class", "kafka.serializer.StringEncoder"); ConsumerConfig config = new ConsumerConfig(props); consumer = kafka.consumer.Consumer.createJavaConsumerConnector(config); } void consume() { Map<String, Integer> topicCountMap = new HashMap<String, Integer>(); topicCountMap.put(KafkaProducer.TOPIC, new Integer(1)); StringDecoder keyDecoder = new StringDecoder(new VerifiableProperties()); StringDecoder valueDecoder = new StringDecoder(new VerifiableProperties()); Map<String, List<KafkaStream<String, String>>> consumerMap = consumer.createMessageStreams(topicCountMap, keyDecoder, valueDecoder); KafkaStream<String, String> stream = consumerMap.get(KafkaProducer.TOPIC).get(0); ConsumerIterator<String, String> it = stream.iterator(); while (it.hasNext()) { System.out.println("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<" + it.next().message() + "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"); /* KafkaProducer kafkaProducer = new KafkaProducer(); kafkaProducer.produce();*/ } } public static void main(String[] args) { new KafkaConsumer().consume(); } }