深入浅出kafka 核心设计与实践---java运行生产者消费者

  
  
	            org.mybatis.spring.boot
	            mybatis-spring-boot-starter
	            2.1.0
	        
	
	        
	            org.springframework.boot
	            spring-boot-starter-test
	            test
	        
	
	        
	            org.springframework.boot
	            spring-boot-starter-thymeleaf
	        
	
	        
	            org.springframework.boot
	            spring-boot-starter-web
	        
	
	        
	            mysql
	            mysql-connector-java
	            runtime
	        
	
	        
	            org.springframework.boot
	            spring-boot-starter-jdbc
	        
	
	        
	        
	            org.apache.kafka
	            kafka-clients
	            0.11.0.0
	        
	    

import java.util.Properties;

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;

public class ProducerDemo {

    public static void main(String[] args){
        Properties properties = new Properties();
        properties.put("bootstrap.servers", "127.0.0.1:9092");
        properties.put("acks", "all");
        properties.put("retries", 0);
        properties.put("batch.size", 16384);
        properties.put("linger.ms", 1);
        properties.put("buffer.memory", 33554432);
        properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        properties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        Producer producer = null;
        try {
            producer = new KafkaProducer(properties);
//            producer.send(new ProducerRecord("HelloWorld","aaaaaaaaaaaa"));
            for (int i = 0; i < 100; i++) {
                String msg = "This is Message " + i;
                producer.send(new ProducerRecord("HelloWorld", msg));
                System.out.println("Sent:" + msg);
            }
        } catch (Exception e) {
            e.printStackTrace();

        } finally {
            producer.close();
        }
    }
}

import java.util.Arrays;
import java.util.Properties;

import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;

public class ConsumerDemo {

    public static void main(String[] args) throws InterruptedException {
        Properties properties = new Properties();
        properties.put("bootstrap.servers", "127.0.0.1:9092");
        properties.put("group.id", "group-1");
        properties.put("enable.auto.commit", "true");
        properties.put("auto.commit.interval.ms", "1000");
        properties.put("auto.offset.reset", "earliest");
        properties.put("session.timeout.ms", "30000");
        properties.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        properties.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

        KafkaConsumer kafkaConsumer = new KafkaConsumer<>(properties);
        kafkaConsumer.subscribe(Arrays.asList("HelloWorld"));
        while (true) {
            ConsumerRecords records = kafkaConsumer.poll(100);
            for (ConsumerRecord record : records) {
                System.out.printf("offset = %d, value = %s", record.offset(), record.value());
                System.out.println("=====================>");
            }
        }
    }
}