Service

 @Service

public class CustomerService {

@Autowired

private CustomerDao customerDao;

public ResponseEntity<ResponseStructure<Customer>> saveCustomer(Customer customer)

{

ResponseStructure<Customer> structure = new ResponseStructure<Customer>();

structure.setBody(customerDao.saveCustomer(customer));

structure.setMessage("Saved Successfully");

structure.setCode(HttpStatus.ACCEPTED.value());

return new ResponseEntity<ResponseStructure<Customer>> (structure,HttpStatus.ACCEPTED);

}

public ResponseEntity<ResponseStructure<Customer>> updateCustomer(Customer customer)

{

ResponseStructure<Customer> structure = new ResponseStructure<Customer>();

structure.setBody(customerDao.updateCustomer(customer));

structure.setMessage("Saved Successfully");

structure.setCode(HttpStatus.ACCEPTED.value());

return new ResponseEntity<ResponseStructure<Customer>> (structure,HttpStatus.ACCEPTED);

}

public ResponseEntity<ResponseStructure<String>> deleteCustomer(int id)

{

ResponseStructure<String> structure = new ResponseStructure<String>();

Optional<Customer> op = customerDao.getCustomer(id);

if(op.isPresent())

{

customerDao.deleteCustomer(id);

structure.setBody("User Present");

structure.setMessage("Delete Successfully");

structure.setCode(HttpStatus.FOUND.value());

}else {

throw new IdNotFoundException();

}

return new ResponseEntity<ResponseStructure<String>>(structure, HttpStatus.FOUND);

}

public ResponseEntity<ResponseStructure<String>> getCustomer(int id)

{

ResponseStructure<String> structure = new ResponseStructure<String>();

Optional<Customer> op = customerDao.getCustomer(id);

if(op.isPresent())

{

structure.setBody("User Present");

structure.setMessage("Id is present");

structure.setCode(HttpStatus.FOUND.value());

}else {

throw new IdNotFoundException();

}

return new ResponseEntity<ResponseStructure<String>>(structure, HttpStatus.FOUND);

}

public ResponseEntity<ResponseStructure<List<Customer>>> getAll()

{

ResponseStructure<List<Customer>> structure = new ResponseStructure<List<Customer>>();

structure.setBody(customerDao.getAll());

structure.setMessage("Records are fetched");

structure.setCode(HttpStatus.FOUND.value());

return new ResponseEntity<ResponseStructure<List<Customer>>>(structure, HttpStatus.FOUND);

}

}