mongodb - MongoUserDetailsService in java config returns null -

anybody can see why null when returning customer? i'm using java config , able connect db mongoconfig.

but when wants login seems problem mongouserdtailsservice.

thanks

   public class mongouserdetailsservice implements userdetailsservice    {    @override   public userdetails loaduserbyusername(string username) throws        authenticationserviceexception   {     mongooperations mongooperations = null;      try     {         mongooperations = new mongotemplate(new mongoclient(), "booking");     }     catch (unknownhostexception e)     {         e.printstacktrace();     }     catch (mongoexception e)     {         e.printstacktrace();     }     try     {         query query = new query(criteria.where("email").is(username));         system.out.println("query ready go");         customer customer = mongooperations.findone(query, customer.class);         system.out.println("query done");         system.out.println("user: "+customer);          if (customer == null)         {             throw new authenticationserviceexception("authentication failed   user " + username);          }         boolean enabled = true;         boolean accountnonexpired = true;         boolean credentialsnonexpired = true;         boolean accountnonlocked = true;          return new user(customer.getusername(),   customer.getpassword().tolowercase(), enabled, accountnonexpired,   credentialsnonexpired, accountnonlocked,                 getauthorities(2));      }     catch (exception e)     {         system.out.println("query failed");         throw new runtimeexception(e);     }   }   public collection<? extends grantedauthority> getauthorities(integer role)   {     list<grantedauthority> authlist = getgrantedauthorities(getroles(role));     return authlist;     }     public list<string> getroles(integer role)   {     list<string> roles = new arraylist<string>();      if (role.intvalue() == 1)     {         roles.add("role_user");          roles.add("role_admin");      }     else if (role.intvalue() == 2)      {         roles.add("role_user");     }       return roles;    }      public static list<grantedauthority> getgrantedauthorities(list<string>   roles)     {      list<grantedauthority> authorities = new arraylist<grantedauthority>();      (string role : roles)     {         authorities.add(new simplegrantedauthority(role));     }     return authorities;    }      } 

solved

it conflict in mongouserdetailsservice.

here new 1 working well!(obs! new log in email)

 @component public class mongouserdetailsservice implements userdetailsservice {     public mongooperations mongooperations;      private user userdetails;      @override     public userdetails loaduserbyusername(string email) throws usernamenotfoundexception     {          boolean enabled = true;         boolean accountnonlocked = true;         boolean accountnonexpired = true;         boolean credentialsnonexpired = true;         try         {             mongooperations = new mongotemplate(new mongoclient(), "booking");             customer user = getuserbyemail(email);              userdetails = new user(user.getemail(), user.getpassword(), enabled, accountnonexpired, credentialsnonexpired, accountnonlocked,                     getauthorities(user.getroleasint()));         }         catch (unknownhostexception e)         {             e.printstacktrace();         }           return userdetails;     }      public list getauthorities(integer role)     {          list authlist = new arraylist();         if (role.intvalue() == 2)         {             authlist.add(new simplegrantedauthority("role_admin"));             authlist.add(new simplegrantedauthority("role_user"));         }         if (role.intvalue() == 1)         {             authlist.add(new simplegrantedauthority("role_user"));         }          return authlist;      }      public customer getuserbyemail(string email)     {         query query = new query();         query.addcriteria(criteria.where("email").is(email));         customer customer = mongooperations.findone(query, customer.class);          return customer;     }  }