java-tutorials/spring-protobuf/src/main/java/com/baeldung/protobuf/CourseController.java

package com.baeldung.protobuf;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.baeldung.protobuf.BaeldungTraining.Course;

@RestController
public class CourseController {

    @Autowired
    CourseRepository courseRepo;

    @RequestMapping("/courses/{id}")
    Course customer(@PathVariable Integer id) {
        return courseRepo.getCourse(id);
    }
}