spring cloud 搭建（kafka入门）

关于微服务的搭建，大家可以参考前面几篇。

注册中心

配置中心

微服务

路由中心

 

今天，搭建一个简单的消息中间件Kafka.

一， zookeeper：

1 下载 

http://zookeeper.apache.org/releases.html#download

2 修改配置

将“zoo_sample.cfg”重命名为“zoo.cfg”

设置dataDir为自己的路径

添加admin.serverPort=xxx端口

添加系统变量：ZOOKEEPER_HOME=F:\apache-zookeeper-3.6.1-bin;
path系统变量：添加路径：%ZOOKEEPER_HOME%\bin;

 

3 运行

在目录中，启动zkserver

 

二，kafka

1 下载

http://kafka.apache.org/downloads

 

2 修改配置

找到config文件夹下的：server.properties

添加：zookeeper.connect=localhost:2181

log.dirs=tmp/kafka-logs

kafka 默认 9092 端口

 

3 运行

目录下，运行：> bin\windows\kafka-server-start.bat config\server.properties

PS：

在Windows上，启动Zookeeper和Kafka

> bin\windows\zookeeper-server-start.bat config\zookeeper.properties  （zkserver）
> bin\windows\kafka-server-start.bat config\server.properties

 

三，新建kafka服务

1 新建

如何新建微服务，参考之前的文章。

 

2 bootstrap.yml（参考  配置中心）

spring:
  http:
    encoding:
      charset: UTF-8
      enabled: true
      force: true
  cloud:
    config:
      uri: http://${host:localhost}:9020
      name: config
      profile: ${active:dev}

 

3 application.yml （参考  配置中心）

server:
  port: 9900

eureka:
  client:
    service-url:
      defaultZone: ${registry.url}
  instance:
    lease-expiration-duration-in-seconds: 60
    lease-renewal-interval-in-seconds: 30
    preferIpAddress: true
    instanceId: ${spring.cloud.client.ip-address}:${server.port}

spring:
  application:
    name: testkafka
  cloud:
    stream:
      kafka:
        binder:
          brokers: localhost:9092
      bindings:
        test-in: #TestStream 中 INPUT
          destination: testkafka
          contentType: application/json
        test-out: #TestStream 中 OUTPUT
          destination: testkafka
          contentType: application/json

 

4 KafkaApplication

@SpringBootApplication
@EnableEurekaClient
public class KafkaApplication {
    public static void main(String[] args) {
        SpringApplication.run(KafkaApplication.class, args);
    }
}

 

5 TestStream

package com.test.kafka.controller;

import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.Output;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.SubscribableChannel;

/**
 * @author Tyler
 * @date 2020/7/28
 */

public interface TestStream {
    String INPUT = "test-in";
    String OUTPUT = "test-out";
    @Input(INPUT)
    SubscribableChannel testIn();
    @Output(OUTPUT)
    MessageChannel testOut();
}

 

6 StreamReceiver

package com.test.kafka.controller;

import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.stereotype.Component;

/**
 * @author Tyler
 * @date 2020/7/28
 */

@Component
@EnableBinding(value = {TestStream.class})
public class StreamReceiver {

    @StreamListener(TestStream.INPUT)
    public void receive(String message) {
        System.out.println("StreamReceiver: "+message);
    }
}

 

7 SendController

package com.test.kafka.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Tyler
 * @date 2020/7/29
 */

@RestController
@RequestMapping("api/")
public class SendController {
    @Autowired
    private TestStream testStream;

    @GetMapping("send")
    public void send() {
//        System.out.println("Hello World...");
        testStream.testOut().send(MessageBuilder.withPayload("Hello World...").build());
    }
}

 

8 POM文件

主要：

spring-boot-starter-web
spring-cloud-starter-netflix-eureka-client
spring-cloud-config-client
spring-cloud-starter-stream-kafka

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.3.2.RELEASE
         
    
    com.test
    kafka
    0.0.1-SNAPSHOT
    kafka
    Demo project for Spring Boot

    
        1.8
        Hoxton.SR6
    

    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client
        
        
        
            org.springframework.cloud
            spring-cloud-config-client
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
            
                
                    org.junit.vintage
                    junit-vintage-engine
                
            
        

        
            org.springframework.cloud
            spring-cloud-starter-stream-kafka
            2.0.1.RELEASE
        
        
            org.springframework
            spring-web
            5.2.4.RELEASE
            compile
        
    

    
        
            
                org.springframework.cloud
                spring-cloud-dependencies
                ${spring-cloud.version}
                pom
                import
            
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

 

四，运行

1 启动 zookeeper

2 启动 kafka

3 启动注册中心，配置中心

4 启动kafka服务

5 浏览：http://localhost:9900/api/send

6 控制台