Performing database operations in background thread

Need of using a background thread

• Database query operations take a long time to perform the background operations.
• There is the possibility that during this time UI thread may freeze and possibly it might crash.

Support for threading in Room

• We can perform the operations by manually creating a separate thread. But co-routines are supported by the room that offers to thread.
• We just add the suspend keyword and the threading is handled by room

Support for Flow API

• Flow is an observable API.
• When we update the table in the database. We get a new list once the database updated.
• It is a kind of observable design pattern.
• Basically it has two parts.
  • Flow -> Producer Side.
  • Flow Collector -> Consumer Side.
• Ex: consider we have a list of students in the database. We will add a new entry to the database. We don't need to fetch a new list of students, Flow enables us to perform this automatically.