Implement DataServer

[otomn]

Implement DataServer (There already exists a file called DataLoader, rename it to DataServer)

Attribute

Cache: contains a map from UID to any domain object

Functions

genericRead(obj: any, objClass: Function): any

• Check to see if the object is in the cache
• If not, try fetch it from the DatabaseManager and add it to the cache
• Check the class is correct
• No validation is needed, we will assume everything from the DataServer must be valid

genericDelete(obj any, objClass: Function): bool

• Try a read, return false if failed
• Delete the object from the cache
• Delete the object form the database using DatabaseManager

genericCreate(obj any, objClass: Function): Error | null

• Run validator to validate the object
• Return error if validation fails
• Create the object in the database using DatabaseManager
• Load the object into the cache

Hookup

Update all backend controllers to call DataServer if possible Update will be done with delete then create