2019-06-12 两种rpc调用方式
1、pom文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.zbiti.zz</groupId>
<artifactId>order</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>order</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
<version>1.4.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2、application.yml
server:
port: 1007
spring:
application:
name: order
eureka:
client:
service-url:
defaultZone: http://localhost:1005/eureka/
register-with-eureka: true
fetch-registry: true
3
3.1 RestTemplate 方式需要准备一个 配置bean
@Configuration
public class RestTemplateMothedBeans {
@Bean
@LoadBalanced//这是ribbon 负载均衡
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
3.2 需要定义一个feign客户端接口
//value 是被调用服务名称，注册在eureka里的名称
@FeignClient(value ="member")
public interface MemberApiFeign {
//服务中方法的映射路径。照搬member 服务中的映射和方法，只是么有方法体
@RequestMapping("/getMember")
public String getMember();
}
3.3远程调用member 服务中的方法
@RestController
public class OrderApiController {
#RestTemplate方式需要注入上面方法中的bean
@Autowired
private RestTemplate restTemplate;
#feign 客户端方式，直接注入上面定义的接口
@Autowired
private MemberApiFeign memberApiFeign;
@RequestMapping("/remote/member")
public String orderRemoteGetMember(){
String url="http://member/getMember";//当使用ribbon 负载均衡调用微服务时，这里就可以直接 将ip和端口替换为注册的服务名
String s = restTemplate.getForObject(url, String.class);
System.out.println(s);
return s;
}
@RequestMapping("/feign/remote")
public String feignRemoteGetMember(){
return memberApiFeign.getMember();
}
}
