I was working on the IMAP server this morning and I realized that I had an annoying pattern that I needed to generalize. Throughout the code I have been using the state of the FMS to figure out which is the correct store to get information from and then calling a specific command from that store. Depending on the actual process that is doing this it can take between 2 and 4 lines of code.
I started to develop an abstraction layer inside the gen_store, so that you can now call the command you are using from gen_store, giving it the data needed and the state data, and it will figure out the correct store to use to call the command from the state data.
The way the information is being processed does not change, but the way the user calls the data does. The user no longer need to figure out which is the correct store, it only calls the function from gen_store and lets gen_store figure it out. This simplifies the user process down to one line of code instead of as many as 4 and only minimally increases the size of the gen_store module.
I’ll be re-factoring this into the code as I go along, but I am looking forward to simplifying this task quite a bit.
