Producer & Consumer
需要与Eureka结合使用
Producer
一、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> <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
---
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
@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
<?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
---
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
@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
@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
@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
---
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
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