Angularjs returnJson from database - angularjs

Question

I want to return a JSON Object in a datatable. I've provided the static working code that I found in an example in my angularjs template.
Thanks for help.
controller.js
function datatablesCtrl($scope,DTOptionsBuilder){
$scope.persons = [
{
id: '1',
firstName: 'Monica',
lastName: 'Smith'
},
{
id: '2',
firstName: 'Sandra',
lastName: 'Jackson'
}
];
}
Utenti.jsp
<div class="wrapper wrapper-content animated fadeInRight" ng-controller="datatablesCtrl">
<div class="row">
<div class="col-lg-12">
<table datatable="ng" dt-options="dtOptions" class="table table-striped table-bordered table-hover dataTables-example">
<thead>
<tr>
<th>ID</th>
<th>FirstName</th>
<th>LastName</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="person in persons">
<td>{{ person.id }}</td>
<td>{{ person.user }}</td>
<td>{{ person.password }}</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
I need to populate the $scope.person with data into a database.
The table of database is "utenti" with column id,fistName,lastName.
These are my classes.. There is also a class Utenti with a simple getter & setter.
UtentiService.class
#Service("UtentiService")
public class UtentiService implements IUtentiService{
private EntityManager entityManager;
final static Logger logger = Logger.getRootLogger();
#PersistenceContext
public void setEntityManager(EntityManager entityManager) {
this.entityManager = entityManager;
}
public EntityManager getEntityManager() {
return entityManager;
}
#Transactional(readOnly = true)
public List<Utenti> getAll() {
Query queryFindAll = null;
try{
queryFindAll = entityManager.createNamedQuery("utenti.findAll");
}catch(Exception ex){
logger.error("Failed in method **getAll** of utentiService: ",ex);
}
return (List)queryFindAll.getResultList();
}
}
IUtentiService.class
public interface IUtentiService {
public List<Utenti> getAll(); //Restituisce una lista di tutti i siti
}
UtentiRest.class
#Path("/utenti")
#Component
#Scope("request")
public class UtentiRest {
#Autowired
IUtentiService nameUtentiService;
final static Logger logger = Logger.getRootLogger();
#GET
#Produces("application/json")
#Path("/getAll")
public JSONObject getAll() {
ExecutorService executorService = Executors.newFixedThreadPool(10);
JSONObject jsonSitiTotal = new JSONObject();
try {
List<Utenti> soluzioni = nameUtentiService.getAll();
Iterator<Utenti> iter = soluzioni.iterator();
JSONArray jsonArray = new JSONArray();
while (iter.hasNext()) {
Utenti ut = (Utenti) iter.next();
JSONObject jsonSiti2 = new JSONObject();
jsonSiti2.put("id", ut.getId());
jsonSiti2.put("user", ut.getUserName());
jsonSiti2.put("password", ut.getPassword());
jsonArray.put(jsonSiti2);
}
jsonSitiTotal.put("Siti",jsonArray);
} catch (JSONException ex) {
logger.info(Level.ERROR, ex);
throw new WebApplicationException(
Response.status(Response.Status.BAD_REQUEST)
.entity("JSON Exception " + ex.getMessage())
.build()
);
} catch (NullPointerException ex) {
logger.info(Level.ERROR, ex);
throw new WebApplicationException(
Response.status(Response.Status.NO_CONTENT)
.entity("No process find ")
.build()
);
} catch (IllegalArgumentException ex) {
logger.info(Level.ERROR, ex);
throw new WebApplicationException(
Response.status(Response.Status.NOT_ACCEPTABLE)
.entity("Couldn't process request with the provided argument: "
+ " (" + ex.getMessage() + ")")
.build()
);
}finally {
executorService.shutdown();
}
return jsonSitiTotal;
}
}