使用SpringCloud搭建一个简单的项目

因为要研究分布式事务 所以搭建一个简单的SpringCloud的项目 来进行事务相关的测试 中间出现了一些小问题 在这里记录一下创建项目的整个过程

• 创建EurekServer
  创建一个springboot项目 并引入依赖web eurekserver hystrix-dashboard,'security'

        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-server
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-hystrix-dashboard
        
        
            org.springframework.boot
            spring-boot-starter-security
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            org.springframework.boot
            spring-boot-starter-security
        

修改配置文件 更改端口号 以及配置security

server:
  port: 8761

spring:
  application:
    name: registry
  security:
    user:
      name: zhou
      password: 12345678

eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
    serviceUrl:
      defaultZone: http://zhou:12345678@localhost:${server.port}/eureka/

然后修改启动类

@SpringBootApplication
@EnableEurekaServer
@EnableHystrixDashboard
public class RegistryApplication {

    public static void main(String[] args) {
        SpringApplication.run(RegistryApplication.class, args);
    }

}

然后建立一个zuul的网关 引入pom文件

   
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-zuul
        

对yml文件进行配置 修改端口号 增加application name

server:
  port: 8888

spring:
  application:
    name: proxy
eureka:
  client:
    serviceUrl:
      defaultZone:  http://zhou:12345678@localhost:8761/eureka

然后写一个user的项目来进行测试 使用的是h2和jpa
建立domain类

@Entity(name = "customer")
public class Customer {
    @Id
    @GeneratedValue
    private Long userId;
    private String password;
    private String userName;

    public Long getUserId() {
        return userId;
    }

    public void setUserId(Long userId) {
        this.userId = userId;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }
}

建立CustomerRepositry 因为就是一个测试 所以只是继承了JpaRepository

public interface CustomerRepositry extends JpaRepository {

}

service

@Service
public class CustomerService {
    @Resource
    private CustomerRepositry customerRepositry;

    //根据id 查询用户
    public Optional getCustomerById(Long id){
        return customerRepositry.findById(id);
    }
    //查询用户信息
    public List getAllCustomer(){
        return customerRepositry.findAll();
    }
    //保存用户信息
    public void save(Customer customer){
        customerRepositry.save(customer);
    }
}

controller

@RestController
@RequestMapping("/user/test")
public class CustomerController {
    @Resource
    private CustomerService customerService;
    @Resource
    private OrderClient orderClient;

    @PostConstruct
    public void init(){
        Customer customer = new Customer();
        customer.setUserId(1L);
        customer.setUserName("KrisWu");
        customer.setPassword("123456");
        customerService.save(customer);
    }

    @RequestMapping("getCustomer")
    public List getCustomer(){
        return customerService.getAllCustomer();
    }

    @RequestMapping("getOrder")
    @HystrixCommand
    public Map getOrder(){
        Optional customer = customerService.getCustomerById(1L);
        String orderDetail = orderClient.getMyOrder(1L);
        Map map = new HashMap();
        map.put("customer",customer);
        map.put("orderDetail",orderDetail);
        return map;
    }

启动项目 出现了报错

ERROR 11612 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient    : *****:***** - was unable to send heartbeat!

这个错误是在2.0以上会出现的。是因为security默认启用了csrf检验，要在eurekaServer端配置security的csrf检验为false。
所以在repostory中新建一个config文件

@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable();
        super.configure(http);
    }
}

然后通过proxy的地址来访问user的项目
访问地址(http://localhost:8888/user/user/test/getCustomer)
然后发现可以显示增加的用户信息

通过zuul访问

然后再新建一个order的项目 想要达到的想过是可以在user的项目中 直接调用order中的方法 这里和user基本上是差不多的 就不贴代码了
重要的地方是在user的项目中 新建一个类OrderClient

@FeignClient(value = "order",path = "/order/test")
public interface OrderClient {
    @GetMapping("/{id}")
    String getMyOrder(@PathVariable(name = "id")Long id);
}

主要就是通过这个类进行连接
然后启动项目 进行测试

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