Cloud Feign #WIP#
https://github.com/spring-boot-tutorials/cloud-open-feign
Create Initial Code Base
Go to https://start.spring.io/
Add the following dependencies:
spring-boot-starter-web
spring-cloud-starter-openfeign
lombok
Click
Generate
Dependencies
Dependencies used in pom.xml:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.36</version>
</dependency>
Model
Create new file src/main/java/com/example/cloud_openfeign/Post.java:
@Data
@NoArgsConstructor
public class Post {
private Integer userId;
private Integer id;
private String title;
private String body;
}
Configuration
Create a new file src/main/java/com/example/cloud_openfeign/MyFeignClientConfiguration.java:
@Configuration
@EnableFeignClients
public class MyFeignClientConfiguration {
// TODO see https://www.baeldung.com/spring-cloud-openfeign#configuration
}
Feign Client
Create a new file src/main/java/com/example/cloud_openfeign/MyFeignClient.java:
@FeignClient(
value = "jplaceholder",
url = "https://jsonplaceholder.typicode.com/",
configuration = MyFeignClientConfiguration.class
)
public interface MyFeignClient {
@GetMapping("/posts")
List<Post> getPosts();
@GetMapping(value = "/posts/{postId}", produces = "application/json")
Post getPostById(@PathVariable("postId") Long postId);
}
Run Spring Application
Open terminal at project root and execute the following:
mvn spring-boot:run