kafka 0.10.2 消息消费者

时间:2024-05-20 16:35:02
package cn.xiaojf.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;
import sun.applet.Main; import java.util.Arrays;
import java.util.List;
import java.util.Properties; /**
* 消息消费者
* @author xiaojf 2017/3/22 15:50
*/
public class MsgConsumer {
private static final String GROUP = "MsgConsumer";
private static final List TOPICS = Arrays.asList("my-replicated-topic"); /**
* 自动提交offset
*/
public void autoCommit() {
Properties properties = new Properties();
properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getCanonicalName());//key反序列化方式
properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getCanonicalName());//value反系列化方式
properties.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG,true);//自动提交
properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.59.130:9092,192.168.59.131:9092,192.168.59.132:9092");//指定broker地址,来找到group的coordinator
properties.put(ConsumerConfig.GROUP_ID_CONFIG,this.GROUP);//指定用户组 KafkaConsumer<String,String> consumer = new KafkaConsumer<String, String>(properties);
consumer.subscribe(TOPICS); while (true) {
ConsumerRecords<String, String> records = consumer.poll(100);//100ms 拉取一次数据
for (ConsumerRecord<String, String> record : records) {
System.out.println("topic: "+record.topic() + " key: " + record.key() + " value: " + record.value() + " partition: "+ record.partition());
}
}
} /**
* 手动提交offset
*/
public void consumer() {
Properties properties = new Properties();
properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getCanonicalName());//key反序列化方式
properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getCanonicalName());//value反系列化方式
properties.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG,false);//手动提交
properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.59.130:9092,192.168.59.131:9092,192.168.59.132:9092");//指定broker地址,来找到group的coordinator
properties.put(ConsumerConfig.GROUP_ID_CONFIG,this.GROUP);//指定用户组 KafkaConsumer<String,String> consumer = new KafkaConsumer<String, String>(properties);
consumer.subscribe(TOPICS);//指定topic消费 long i = 0;
while (true) {
ConsumerRecords<String, String> records = consumer.poll(100);//100ms 拉取一次数据
for (ConsumerRecord<String, String> record : records) {
System.out.println("topic: "+record.topic() + " key: " + record.key() + " value: " + record.value() + " partition: "+ record.partition());
i ++;
} if (i >= 100) {
consumer.commitAsync();//手动commit
i = 0;
}
}
} public static void main(String[] args) {
new MsgConsumer().autoCommit();
}
}
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>0.10.2.0</version>
</dependency>