Externalize mongo json query using spring boot - spring-boot

Question

I have just started using spring data MongoDb with Spring-Boot.
I have some mongo based json queries added in the interface using #query annotation when using spring data repository.
I want to know if it is possible to externalize or separate out the JSON query outside the codebase so that it can be optimized separately and
also not having it mixed with code.
Thanks for your suggestions.
This is the code which i have added in my interface and annotated with #query annotation.
#Query("{ 'firstname' : ?0 ,'lastname': ?1}")
List findByCriteria(String firstname,String lastname);
The above is a simple example. I have complex conditions involving $and and $or operators too .
What i basically want to achieve is externalize the above native mongo json query to a config file and refer that in the above annotation.
Spring data supports something similar when using jpa with hibernate. But not sure if we can do the same using spring data mongodb with spring boot.

Answer 1

Do like this (I am explaining only for the API)
Suppose you have an Entity user
At the Top there will be User domain
public class User extends CoreDomain {
private static final long serialVersionUID = -4292195532570879677L;
#Length(min = 2)
private String name;
#Length(min = 2)
#UniqueUserName(message = "User name already registered,Please choose something Different")
private String userName;
#Length(min = 6)
private String password;
}
User Controller
User Service (Interface)
User ServiceImpl(Service Implementation)
Mongo Repository(Since, I have MongoDb)
Now in userController you will take all the queries , Param(Parameters) , Pagerequest like this
public class UserController extends CoreController {
#Autowired
private UserService userService;
/*
* This controller is for getting the UserDetails on passing the UserId in
* the #param Annotation
*/
#GET
#Path("{id}")
public User getUser(#PathParam("id") String UserId) {
User user = new User();
user = userService.findUserId(UserId);
if (user == null)
throw new NotFoundException();
log.info("The userId you searched is having the details as :" + user);
return user;
}}
For serviceInterface you will have :
public interface UserService {
// Boolean authenticateUser(User user);
User findUserId(String UserId);
}
For serviceImpl :
public class UserServiceImpl implements UserService {
#Setter
#Autowired
private UserRepository userRepository;
/*
* This method will find user on the basis of their userIds passed in the
* parameter.
*/
#Override
public User findUserId(String UserId) {
User userIdResult = userRepository.findOne(UserId);
log.info("The userDetail is" + userIdResult);
return userIdResult;
}
In mongoRepository for user we will have:
A default query findById(String userId);
Hopefully this will help you.