springcloud-服务的生产者和消费者

1. provider 服务生产者环境的搭建

导入相关依赖：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-eureka</artifactId>
    <version>1.4.6.RELEASE</version>
</dependency>
​
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

 

配置yml文件

server:
  port: 8001
​
mybatis:
  type-aliases-package: com.fly.pojo
  mapper-locations: classpath:mybatis/mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true
​
spring:
  application:
    name: springcloud-provider-dept
  #数据源配置
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:4001/db01?serverTimeZone=UTC&useUnicode=true&characterEncoding=utf-8
    username: *****
    password: *******
​
#eureka配置
eureka:
  client:
    service-url:
      #连接的eureka地址
      defaultZone: http://localhost:7001/eureka
​
  instance:
    instance-id: springcloud-privider-dept-8001
​
​
info:
  app.name: zhu
  company.name: zhu

 

编写主启动类

@SpringBootApplication
@EnableEurekaClient //开启eureka客户端配置
//@EnableCircuitBreaker
public class ProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(ProviderApplication.class, args);
    }
}

 

 2. consumer服务消费者的搭建

服务的搭建和配置和生产者一致   调用方式：Ribbon 和 Feign 两种

 

导入ribbon相关的依赖

<!-- ribbon -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-ribbon</artifactId>
    <version>1.4.6.RELEASE</version>
</dependency>

 

 Ribbon调用方式：

//编写RestTemplate配置，并配置负载均衡机制默认是轮询（这样可以直接通过服务名去调用）
@Bean
@LoadBalanced
public RestTemplate restTemplate() {
    return new RestTemplate();
}
​
​
//调用示例：
@RestController
public class DeptConsumerController {
​
    @Resource
    private RestTemplate restTemplate;
​
    @Resource
    private DiscoveryClient client;
​
    //服务的生产者的服务名
    private static final String REST_URL_PREFIX = "http://springcloud-provider-dept";
​
    @GetMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id) {
        Dept dept = restTemplate.getForObject(REST_URL_PREFIX + "/dept/getById?id=" + id, Dept.class);
        return dept;
    }
}

 

Feign 调用方式更能体现面向接口编程的思想

//主启动类中需要开启Feign相关的配置
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages = {"com.fly"})
public class FeignConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(FeignConsumerApplication.class, args);
    }
}
​
//1. 编写一个服务调用的接口
@Component
//指定要调用的服务端的服务名称
@FeignClient(value = "springcloud-provider-dept")
public interface DeptService {
​
    @GetMapping("/dept/getById")
    public Dept queryDeptById(Long id);
​
    @GetMapping("/dept/list")
    public List<Dept> queryAll();
}
​
​
//按照接口的方式直接调用
@RestController
public class DeptConsumerController {
​
    @Resource
    private DeptService deptService;
​
    @GetMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id) {
        return deptService.queryDeptById(id);
    }
​
    @GetMapping("/consumer/dept/list")
    public List<Dept> list() {
        return deptService.queryAll();
    }
}