五陵年少金市东,银鞍白马渡春风。这篇文章主要讲述#yyds干货盘点# springcloud整合feign实现服务负载均衡,断路器相关的知识,希望能为你提供帮助。
springcloud整合feign实现服务负载均衡,断路器
1.项目目录:
创建项目feign作为父类
2.代码实现:
父类依赖
<
parent>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter-parent<
/artifactId>
<
version>
2.6.2<
/version>
<
relativePath/>
<
!-- lookup parent from repository -->
<
/parent>
<
groupId>
com.cxh<
/groupId>
<
artifactId>
feign<
/artifactId>
<
version>
0.0.1-SNAPSHOT<
/version>
<
name>
feign<
/name>
<
description>
Demo project for Spring Boot<
/description>
<
packaging>
pom<
/packaging>
<
properties>
<
java.version>
8<
/java.version>
<
spring-cloud-alibaba-dependencies.version>
2021.1<
/spring-cloud-alibaba-dependencies.version>
<
spring-cloud-dependencies.version>
2021.0.0<
/spring-cloud-dependencies.version>
<
/properties>
<
dependencyManagement>
<
dependencies>
<
dependency>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-dependencies<
/artifactId>
<
version>
$spring-cloud-dependencies.version<
/version>
<
type>
pom<
/type>
<
scope>
import<
/scope>
<
/dependency>
<
dependency>
<
groupId>
com.alibaba.cloud<
/groupId>
<
artifactId>
spring-cloud-alibaba-dependencies<
/artifactId>
<
version>
$spring-cloud-alibaba-dependencies.version<
/version>
<
type>
pom<
/type>
<
scope>
import<
/scope>
<
/dependency>
<
/dependencies>
<
/dependencyManagement>
创建module项目feign-client
添加依赖
<
parent>
<
groupId>
com.cxh<
/groupId>
<
artifactId>
feign<
/artifactId>
<
version>
0.0.1-SNAPSHOT<
/version>
<
relativePath/>
<
!-- lookup parent from repository -->
<
/parent>
<
groupId>
com.cxh<
/groupId>
<
artifactId>
feign-client<
/artifactId>
<
version>
0.0.1-SNAPSHOT<
/version>
<
name>
feign-client<
/name>
<
description>
Demo project for Spring Boot<
/description>
<
properties>
<
java.version>
1.8<
/java.version>
<
/properties>
<
dependencies>
<
dependency>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter<
/artifactId>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter-test<
/artifactId>
<
scope>
test<
/scope>
<
/dependency>
<
!--服务注册-->
<
dependency>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-starter-alibaba-nacos-discovery<
/artifactId>
<
version>
0.2.1.RELEASE<
/version>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter-web<
/artifactId>
<
/dependency>
<
dependency>
<
groupId>
org.projectlombok<
/groupId>
<
artifactId>
lombok<
/artifactId>
<
version>
1.18.20<
/version>
<
scope>
provided<
/scope>
<
/dependency>
<
/dependencies>
yml配置
server:
port: 8001
spring:
application:
name: feign-client #服务名
profiles:
active: dev #环境设置
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848 #nacos服务注册
控制器
@Slf4j
@RestController
public class ClientController
@Value("$server.port")
private String port;
@GetMapping("/add")
public String add(Integer a, Integer b)
Integer c = a + b;
log.info("端口计算:" + port + ":" + c);
return "端口计算:" + port + ":" + c;
启动器添加注解
@SpringBootApplication
@EnableDiscoveryClient
public class FeignClientApplication
public static void main(String[] args)
SpringApplication.run(FeignClientApplication.class, args);
创建module项目feign-client2,这个跟feign-client是一样的,只是yml配置改了个端口,其他代码一样,用于测试负载均衡
server:
port: 8002
spring:
application:
name: feign-client #服务名
profiles:
active: dev #环境设置
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848 #nacos服务注册
创建module项目feign-consumer
添加依赖
<
parent>
<
groupId>
com.cxh<
/groupId>
<
artifactId>
feign<
/artifactId>
<
version>
0.0.1-SNAPSHOT<
/version>
<
relativePath/>
<
!-- lookup parent from repository -->
<
/parent>
<
groupId>
com.cxh<
/groupId>
<
artifactId>
feign-consumer<
/artifactId>
<
version>
0.0.1-SNAPSHOT<
/version>
<
name>
feign-consumer<
/name>
<
description>
Demo project for Spring Boot<
/description>
<
properties>
<
java.version>
1.8<
/java.version>
<
/properties>
<
dependencies>
<
dependency>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter<
/artifactId>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter-test<
/artifactId>
<
scope>
test<
/scope>
<
/dependency>
<
!--服务注册-->
<
dependency>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-starter-alibaba-nacos-discovery<
/artifactId>
<
version>
0.2.1.RELEASE<
/version>
<
exclusions>
<
exclusion>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-starter-netflix-ribbon<
/artifactId>
<
/exclusion>
<
/exclusions>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.boot<
/groupId>
<
artifactId>
spring-boot-starter-web<
/artifactId>
<
/dependency>
<
dependency>
<
groupId>
org.projectlombok<
/groupId>
<
artifactId>
lombok<
/artifactId>
<
version>
1.18.20<
/version>
<
scope>
provided<
/scope>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-starter-feign<
/artifactId>
<
version>
1.4.3.RELEASE<
/version>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-loadbalancer<
/artifactId>
<
/dependency>
<
dependency>
<
groupId>
org.springframework.cloud<
/groupId>
<
artifactId>
spring-cloud-starter-netflix-hystrix<
/artifactId>
<
version>
2.2.10.RELEASE<
/version>
<
/dependency>
<
/dependencies>
yml配置
server:
port: 8003
spring:
application:
name: feign-consumer #服务名
profiles:
active: dev #环境设置
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848 #nacos服务注册
main:
allow-bean-definition-overriding: true
#开启熔断器
feign:
circuitbreaker:
enabled: true
控制器
@Slf4j
@RestController
public class ConsumerController
@Autowired
private ClientService clientService;
@GetMapping("/add")
public String add()
return clientService.add(10, 20);
@FeignClient(value = "https://www.songbingjia.com/android/feign-client", fallback = ClientServiceHystrix.class)
public interface ClientService
@GetMapping("/add")
String add(@RequestParam(vhttps://www.songbingjia.com/android/alue = "a") Integer a, @RequestParam(value = "https://www.songbingjia.com/android/b") Integer b);
@Component
public class ClientServiceHystrix implements ClientService
@Override
public String add(Integer a, Integer b)
return "调用失败";
启动器添加注解
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class FeignConsumerApplication
public static void main(String[] args)
SpringApplication.run(FeignConsumerApplication.class, args);
3.实现效果:
启动nacos后,再启动feign-client, feign-client2, feign-consumer项目,打开浏览器??http://localhost:8003/add??
第一次请求:
端口计算:8001:30
第二次请求:
端口计算:8002:30
关闭feign-client, feign-client2项目后第三请求:
调用失败
【#yyds干货盘点# springcloud整合feign实现服务负载均衡,断路器】
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