Drill 21: Real project — A Spring Boot API

import org.springframework.web.bind.annotation.*;
import java.util.List;

@RestController
@RequestMapping("/api/lessons")
public class LessonController {
    private final LessonService service;

    public LessonController(LessonService service) {
        this.service = service;
    }

    @GetMapping
    public List<Lesson> list() {
        return service.published();
    }

    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    public Lesson create(@RequestBody LessonInput input) {
        return service.create(input);
    }
}