[横書きアイテム]そんなREST APIで大丈夫ですか?本格的なREST APIを実装してみる-コントローラとサービスの分離

イベント・サービスの作成

package com.carrykim.restapi.event.service;

import com.carrykim.restapi.event.infra.EventRepository;
import com.carrykim.restapi.event.model.Event;
import com.carrykim.restapi.event.model.dto.EventDto;
import org.springframework.stereotype.Service;

@Service
public class EventService {

    private final EventRepository eventRepository;

    public EventService(EventRepository eventRepository) {
        this.eventRepository = eventRepository;
    }

    public Event create(EventDto eventDto){
        Event newEvent = eventDto.toModel();
        return eventRepository.save(newEvent);
    }

}

Event Controlの変更

package com.carrykim.restapi.event.controller;

import com.carrykim.restapi.event.model.Event;
import com.carrykim.restapi.event.model.dto.EventDto;
import com.carrykim.restapi.event.service.EventService;
import org.springframework.hateoas.MediaTypes;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.Valid;
import java.net.URI;

import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.linkTo;
import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.methodOn;

@RestController()
@RequestMapping(value = "/api/events", produces = MediaTypes.HAL_JSON_VALUE)
public class EventController {

    private final EventService eventService;

    public EventController(EventService eventService) {
        this.eventService = eventService;
    }

    @PostMapping("")
    public ResponseEntity create(@RequestBody @Valid EventDto eventDto) {
        Event newEvent = this.eventService.create(eventDto);
        URI uri = linkTo(methodOn(EventController.class).create(new EventDto())).slash(newEvent.getId()).toUri();
        return ResponseEntity.created(uri).body(newEvent);
    }
}