springboot could not found feignclient - spring-boot

Question

ERROR INFO LIKE BELOW:
***************************
APPLICATION FAILED TO START
***************************
Description:
Field helloAgent in com.example.client.controller.Hello required a bean of
type 'com.example.common.agent.HelloAgent' that could not be found.
Action:
Consider defining a bean of type 'com.example.common.agent.HelloAgent' in
your configuration.
project structure:
module: test-client as feignclient caller.
module: test-server as feignclient interface implementation.
module: test-common put all feignclient together.
test-common:
package com.example.common.agent;
#FeignClient("hello")
public interface HelloAgent {
#GetMapping("/hello")
String hello(#RequestParam String msg);
}
test-server:(works fine)
package com.example.server.controller;
#RestController
public class Hello implements HelloAgent {
#Override
public String hello(#RequestParam String msg) {
System.out.println("get " + msg);
return "Hi " + msg;
}
}
test-client:
package com.example.client.controller;
#RestController
public class Hello {
#Autowired
private HelloAgent helloAgent;
#GetMapping("/test")
public String test() {
System.out.println("go");
String ret = helloAgent.hello("client");
System.out.println("back " + ret);
return ret;
}
}
----------------------------
#EnableEurekaClient
#EnableFeignClients
#SpringBootApplication
#ComponentScan(basePackages = {"com.example.common.agent","com.example.client.controller"})
public class TestClientApplication {
public static void main(String[] args) {
SpringApplication.run(TestClientApplication.class, args);
}
}
Is there anyway to put all feignclient together so that we can manage them gracefully?
Or there is only way to use them redundancy?
THANKS!

Answer 1

Feign doesn't know about #ComponentScan.
Use #EnableFeignClients(basePackages = {"com.example.common.agent","com.example.client.controller"})

Answer 2

Solution using Configuration
In case you use Swagger Codegen, you can use a configuration to bootstrap the apis:
#Configuration
public class ParkingPlusFeignClientConfiguration {
#Autowired
private ParkingPlusProperties properties;
#Bean
public ServicoPagamentoTicket2Api ticketApi() {
ApiClient client = new ApiClient();
// https://stackoverflow.com/questions/42751269/feign-logging-not-working/59651045#59651045
client.getFeignBuilder().logLevel(properties.getClientLogLevel());
client.setBasePath(properties.getHost());
// Generated from swagger: https://demonstracao.parkingplus.com.br/servicos
return client.buildClient(ServicoPagamentoTicket2Api.class);
}
}