How to retrieve the repository from JHipster spring controller? - spring

Question

I have a JHipster microservice application, and I've added a spring controller. However, it is generated without a repository and I don't know how to retrieve it to perform data tasks.
This is the code:
#RestController
#RequestMapping("/api/data")
public class DataResource {
private final Logger log = LoggerFactory.getLogger(DataResource.class);
private final DeviceRepository deviceRepository;
public DataResource() {
}
/**
* GET global
*/
#GetMapping("/global")
public ResponseEntity<GlobalStatusDTO[]> global() {
List<Device> list=deviceRepository.findAll();
GlobalStatusDTO data[]=new GlobalStatusDTO[]{new GlobalStatusDTO(list.size(),1,1,1,1)};
return ResponseEntity.ok(data);
}
}
EDIT: I need to inject an already existing repository, here is the CRUD part where the repository is initialized:
#RestController
#RequestMapping("/api")
#Transactional
public class DeviceResource {
private final Logger log = LoggerFactory.getLogger(DeviceResource.class);
private static final String ENTITY_NAME = "powerbackDevice";
#Value("${jhipster.clientApp.name}")
private String applicationName;
private final DeviceRepository deviceRepository;
public DeviceResource(DeviceRepository deviceRepository) {
this.deviceRepository = deviceRepository;
}
/**
* {#code POST /devices} : Create a new device.
*
* #param device the device to create.
* #return the {#link ResponseEntity} with status {#code 201 (Created)} and with body the new device, or with status {#code 400 (Bad Request)} if the device has already an ID.
* #throws URISyntaxException if the Location URI syntax is incorrect.
*/
#PostMapping("/devices")
public ResponseEntity<Device> createDevice(#Valid #RequestBody Device device) throws URISyntaxException {
...

Answer 1

I might misunderstand you, but your first code part doesn't work, because, you didn't inject DeviceRepository by the constructor. Of course, there are other methods of injections.
#RestController
#RequestMapping("/api/data")
public class DataResource {
private final Logger log = LoggerFactory.getLogger(DataResource.class);
private final DeviceRepository deviceRepository;
//changes are here only, constructor method of injection
public DataResource(DeviceRepository deviceRepository) {
this.deviceRepository = deviceRepository;
}
/**
* GET global
*/
#GetMapping("/global")
public ResponseEntity<GlobalStatusDTO[]> global() {
List<Device> list=deviceRepository.findAll();
GlobalStatusDTO data[]=new GlobalStatusDTO[]{new GlobalStatusDTO(list.size(),1,1,1,1)};
return ResponseEntity.ok(data);
}
}