需要与Eureka结合使用
Producer
一、pom文件
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<?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> <groupId>peter.test</groupId> <artifactId>producer1</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>producer1</name> <description>Demo project for Spring Eureka Producer</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>10</java.version> <spring-cloud.version>Finchley.RELEASE</spring-cloud.version> </properties> <dependencies> <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-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>javax.xml.bind</groupId> <artifactId>jaxb-api</artifactId> <version>2.3.0</version> </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>
二、application.yml文件
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---
spring:
application:
name: spring-cloud-producer
profiles: producer1
server:
port: 9010
eureka:
instance:
hostname: peterhost1
#ip-address: 127.0.0.1
#prefer-ip-address: true
client:
service-url:
defaultZone: http://peterhost1:9000/eureka/
三、启动注解与Rest Controller
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@SpringBootApplication @EnableDiscoveryClient @ComponentScan({"peter.test.producer1","Service"}) public class Producer1Application { public static void main(String[] args) { SpringApplication.run(Producer1Application.class, args); } } @RestController class TestController{ @RequestMapping("/test") public String index(){ return "peter host."; } @RequestMapping("/test2") public String index(@RequestParam String name) { return "hello "+name+",this is first messge"; } }
Consumer
一、pom文件
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<?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> <groupId>peter.test</groupId> <artifactId>consumer1</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>consumer1</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>10</java.version> <spring-cloud.version>Finchley.RELEASE</spring-cloud.version> </properties> <dependencies> <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-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>javax.xml.bind</groupId> <artifactId>jaxb-api</artifactId> <version>2.3.0</version> </dependency> <!-- Monitor --> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-hystrix --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-hystrix-dashboard --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <!-- turbine --> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-netflix-turbine --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-turbine</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-turbine --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-turbine</artifactId> </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>
二、application.yml文件
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---
spring:
application:
name: spring-cloud-consumer1
profiles: consumer1
server:
port: 9021
feign:
hystrix:
enabled:true
eureka:
instance:
hostname: peterhost1
client:
service-url:
defaultZone: http://peterhost1:9000/eureka/
三、FeignClient请求Producer
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@FeignClient(name= "spring-cloud-producer",fallback =Producer1ServiceHelloHystrix.class) @Component public interface Producer1Service { @RequestMapping(value = "/hello") public String hello(@RequestParam(value = "name") String name); }
name="spring-cloud-producer" 指明producer在Eureka中注册的服务名称
四、Hystrix断路器实现
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@Component public class Producer1ServiceHelloHystrix implements Producer1Service{ @Override public String hello(String name) { return "hello" +name+", this messge from hystrix. "; } }
五、Consumer对外提供的Controller
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@RestController public class ConsumerController { @Autowired Producer1Service producer1Service; @RequestMapping("/hello/{name}") public String index(@PathVariable("name") String name) { System.out.println("log begin\r\n"); String remoteResult="Air"; System.out.println(producer1Service.toString()); try { if(producer1Service==null) { remoteResult="Null remote service."; System.out.println("Null remote service.\r\n"); } else remoteResult=producer1Service.hello(name); } catch (Exception ex){ remoteResult+="\r\n"+ex.getMessage()+ex.getCause()+ex.getStackTrace().toString(); } return remoteResult; } @Autowired private DiscoveryClient discoveryClient; @RequestMapping("/service-instances/{applicationName}") public List<ServiceInstance> serviceInstancesByApplicationName( @PathVariable String applicationName) { return this.discoveryClient.getInstances(applicationName); } }
六、运行
负载均衡
新建一个Producer的项目,为了区分把Controller中返回的信息做一些调整即可
一、application.yml文件
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---
spring:
application:
name: spring-cloud-producer
profiles: producer2
server:
port: 9011
eureka:
instance:
hostname: peterhost2
#ip-address: 127.0.0.1
#prefer-ip-address: true
client:
service-url:
defaultZone: http://peterhost2:9001/eureka/
spring.application.name要和前面一个producer的一样,此处是spring-cloud-producer
二、运行
新的Producer注册至Eureka会有一定的延迟