How to fix the timeout exception in angularJs? - angularjs

Question

I try to do some processing that take time, and suddenly the server returns me a timeOut exception.
Since my controller, I call the generate method that calls a service, and this service calls my class where there is the method that does the processing.
What is the solution in your opinion?
vm.afficher = function() {
vm.details = [];
var x = vm.applicationField;
if (x === undefined || x === null) {
x = 'off';
}
FacturationSvc.generate({
selectedDt : new Date(vm.selectedDt),
applicationField : x
}).$promise.then(function(resp) {
vm.details = JSON.parse(JSON.stringify(resp));
vm.table.check = true;
});
}
vm is the instance of the controller.
#RequestMapping("/facturations")
#Controller
public class FacturationController {
private FacturationSvc facturationSvc;
#Autowired
public FacturationController(FacturationSvc svc, UserSvc userSvc) {
super();
this.facturationSvc = svc;
}
#RequestMapping(value = "/generate/{selectedDt}/applicationName/{applicationField}", method = RequestMethod.GET)
#ResponseBody
public List<Facturation> generate(#PathVariable Date selectedDt,#PathVariable String applicationField) throws NoSuchFieldException{
return facturationSvc.facturer(selectedDt,applicationField);
}
}