java B2B2C Springcloud电子商城系统-------Spring Cloud 集成 kafka

1、在pom.xml里面添加kafka的maven依赖 愿意了解源码的朋友直接求求交流分享技术：二一四七七七五六三三

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-stream-kafka</artifactId>
</dependency>

2、在properties 配置文件里面添加 kafka binder 参数

spring.cloud.stream.kafka.binder.brokers=127.0.0.1:9092
spring.cloud.stream.kafka.binder.zk-nodes=127.0.0.1:2181
spring.cloud.stream.kafka.binder.minPartitionCount=1
spring.cloud.stream.kafka.binder.autoCreateTopics=true
spring.cloud.stream.kafka.binder.autoAddPartitions=true

3、输入通道定义，供消费者使用

（1）在properties配置文件里面添加输入通道配置信息

spring.cloud.stream.bindings.testa.destination=test_spring_stream
spring.cloud.stream.bindings.testa.group=group-1
spring.cloud.stream.bindings.testa.consumer.concurrency=1
spring.cloud.stream.bindings.testa.consumer.partitioned=false

（2）定义输入通道并绑定输入通道配置信息

public interface Sink {
    
    //接收队列1
    String INPUT_1 = "testa";
 
    @Input(Sink.INPUT_1)
    SubscribableChannel input1();
 
}

INPUT_1 = "testa" 跟配置文件里面的通道名称 testa 保持一致
4、输出通道定义，供生产者使用

（1）在properties配置文件里面添加输出通道配置信息

spring.cloud.stream.bindings.sourceA.destination=test_spring_stream
spring.cloud.stream.bindings.sourceA.producer.partitionCount=1

（2）定义输出通道并绑定输出通道配置信息

public interface Source {
    
    //发送队列1
    String OUTPUT_1 = "sourceA";
    
    @Output(Source.OUTPUT_1)
    MessageChannel output1();
    
}

OUTPUT_1 = "sourceA" 跟配置文件里面的通道名称 sourceA 保持一致
5、生产者端代码

 
@EnableBinding(Source.class)
public class KafkaSender {
    
    private final Logger logger = LoggerFactory.getLogger(KafkaSender.class);
    
    @Autowired
    private Source source;
    
    public void sendMessage(String message) {
    try {
        source.output1().send(MessageBuilder.withPayload("message: " + message).build());
    } catch (Exception e) {
        logger.info("消息发送失败，原因："+e);
        e.printStackTrace();
    }
    }
}

调用sendMessage方法发送消息
6、消费者端代码

@EnableBinding(Sink.class)
public class KafkaReceiver {
 
    private final Logger logger = LoggerFactory.getLogger(KafkaReceiver.class);
 
    @StreamListener(Sink.INPUT_1)
    private void receive(String vote) {
        logger.info("receive message : " + vote);
    }
    
}

通过receive方法接收消息，整体代码结构如下：资料和源码来源