How can access to database in the resource file for API? Edited

I am creating the plugin.

But I don't have access to BD from Resource files for Api.

I have table model (

public class ModelServiceImpl implements ModelService {
private final ActiveObjects ao;

public ModelServiceImpl(ActiveObjects ao)
{ = checkNotNull(ao);


And Resource file for API(

public class ModelResource {

private ModelService modelService;

public ModelResource(ModelService modelService) {
this.modelService = modelService;

public Response getModel(@QueryParam("id") int id) {
CacheControl cacheControl = new CacheControl();
return Response.ok(getModelById(id)).cacheControl(cacheControl).build();

private Model getModelById(int id) {
return modelService.getById(id); //modelService is null (NullPointerException)


How can I access the database in the resource file?

1 answer

1 accepted

0 vote


I do not quite understand what the problem is.  Is it NullPointerException in getModelById method? If so then add @Inject to public ModelResource

public ModelResource(ModelService modelService) {
this.modelService = modelService;



Yes, NullPointerException in getModelById method?

I didn't add @Inject.
Thank you very much.

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