spring cloud 消费者

本消费者  加了 Hystrix， 为了后续监控用。

1. 依赖：

  

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

</dependencies>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.SR7</version>
<type>pom</type>
<scope>import</scope>
</dependency>

</dependencies>
</dependencyManagement>
</project>

2. 启动类

@SpringBootApplication
@EnableEurekaClient
@EnableCircuitBreaker
public class ConsumerHelloApplication {

@Bean
@LoadBalanced
RestTemplate restTmeplate() {
return new RestTemplate();
}

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

3. 业务逻辑

@RestController
public class ConsumerContrller {

@Autowired
private RestTemplate restTemplate;

@RequestMapping("/consumer")
@HystrixCommand(fallbackMethod="fallbackHelloConsumer")
public String helloConsumer() {
return restTemplate.getForEntity("http://HELLO-SERVICE/hello",String.class).getBody();
}

public String fallbackHelloConsumer() {
return "error";
}
}

4. 配置

server:
port: 8091
spring:
application:
name: hello-consumer
eureka:
client:
serviceUrl:
defaultZone: http://admin:admin@ym-eureka-server1:8761/eureka/,http://admin:admin@ym-eureka-server2:8762/eureka/,http://admin:admin@ym-eureka-server3:8763/eureka/
instance:
preferIpAddress: true
hystrix:
command:
default:
execution:
isolation:
thread:
timeoutInMilliseconds: 4000