Consul call services (Consumer Services)

Dependencies

Add a dependency in the spring-cloud-consul-client project, POM contents of the file add the following dependency:

                <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</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-web</artifactId>
        </dependency>

spring-cloud-starter-consul-discovery provide support for the Consul, spring-cloud-starter-openfeign provide Feign style calls for the HTTP request, spring-boot-starter-web just to test the use of HTTP MVC convenient.

Configuration information

spring.application.name=spring-cloud-consul-client
server.port=9002
spring.cloud.consul.host=127.0.0.1
spring.cloud.consul.port=8500
#设置不需要注册到 consul 中
spring.cloud.consul.discovery.register=false

This test need not register themselves to the service center: spring.cloud.consul.discovery.register = false, so do not start class declaration @EnableDiscoveryClient notes.

Remote service call interface

@FeignClient(name= "service-provider")
public interface ServiceProviderRemote {

    @RequestMapping("/hello")
    public String Hello(@RequestParam String name);
}

Use openfeign call the remote service interface, openfeign is Feign after the Spring package, this project openfeign need to use spring-cloud-starter-consul-discovery.

Consumer Testing Services Interface

@RestController
public class TestConsul {

    @Autowired
    ServiceProviderRemote remote;

    @RequestMapping("/TestHello")
    public String TestHello(){
        String first = remote.Hello("first-SWS");
        String second = remote.Hello("second-SWS");
        return first + " | " + second;
    }

    @RequestMapping("/Test")
    public String Test(){
        return "OK";
    }
}

To test load balancing so called twice service interface.

Startup class

@SpringBootApplication
@EnableFeignClients
public class SpringCloudConsulClientApplication {

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

}

You need to use @EnableFeignClients annotation start openfeign start class.

Start test project

Access http://127.0.0.1:9002/TestHello see the results:
Alt text

Source

Github repository: https: //github.com/sunweisheng/spring-cloud-example