Kafka例题Producer-Consumer模型

柔光的暖阳◎ 2022-04-02 07:24 208阅读 0赞

Producer

package broker1221;
    
    import org.apache.kafka.clients.producer.KafkaProducer;
    import org.apache.kafka.clients.producer.Producer;
    import org.apache.kafka.clients.producer.ProducerRecord;
    
    import java.util.Properties;
    
    public class ProducerDemo {
        public static void main(String args[]) {
            Properties props = new Properties();
            props.put("bootstrap.servers", "lion:9092");
            props.put("acks", "all");
            props.put("delivery.timeout.ms", 30000);
            props.put("batch.size", 16384);
            props.put("linger.ms", 1);
            props.put("buffer.memory", 33554432);
            props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
            props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
            Producer<String, String> producer = new KafkaProducer<String,String>(props);
            for (int i = 0; i < 100; i++){
                producer.send(new ProducerRecord<String, String>("test123",0, Integer.toString(i), Integer.toString(i)));
            }
            producer.close();
    
        }
    }

Consumer

package broker1221;
    
    import org.apache.kafka.clients.consumer.ConsumerRecord;
    import org.apache.kafka.clients.consumer.ConsumerRecords;
    import org.apache.kafka.clients.consumer.KafkaConsumer;
    
    import java.util.Arrays;
    import java.util.Properties;
    
    public class ConsumerDemo {
        public static void main(String args[]){
            Properties props = new Properties();
            props.put("bootstrap.servers", "lion:9092");
            props.put("group.id", "test");
            props.put("enable.auto.commit", "true");
            props.put("auto.commit.interval.ms", "1000");
            props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
            props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
            KafkaConsumer<String, String> consumer = new KafkaConsumer<String, String>(props);
            consumer.subscribe(Arrays.asList("test123"));
            while (true) {
                ConsumerRecords<String, String> records = consumer.poll(100);
                for (ConsumerRecord<String, String> record : records)
                    System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
            }
        }
    }