Question

I am Creating an app which will store data of songs in database,

i wil be fetching them with JSON from server

but calling JSON remotely is making my app slower so

i thought to use sqllite but songs will get upadated dailly

i will have to fetch them too

but storing all tracks in sql lite will be also not the ideal option so

can you please suggest me best way to sort out this issue

Answer 1

Store a revision number on the device and in your remote DB.

Then do something along these lines:

• On app launch, poll your DB server: GET http://myapp.com/get_json_update?rev=41
  • where rev is the revision number of the DB on the client.
• On the server:
  • Compare the rev # with the one sent by the client.
  • If local rev == remote rev return an empty JSON object.
  • If local rev > remote rev, do a diff, JSONify the objects that have been added since the last rev, return to client.
  • If local rev < remote rev, something went terribly, terribly wrong.
• On the client
  • Push the new objects into your DB.
  • Update the DB rev #.