I have a C# library that is surfaced through a webpage UI. There’s of course the UI layer, which makes calls through a business logic layer, which in turn hits the data access layer to retrieve the data. The data is actually retrieved via a web service which has the capability to query data asynchronously.
I’m starting to learn how to deal with requests asynchronously to both speed up page time (grabbing multiple items from the web service as soon as I can with multiple threads), and for scalability by threads not being tied up all the time.
Given the three-tier architecture of my code, would this mean that pages asynchronously make calls through the business layer (and therefore speed up by making concurrent requests), and the web service in the data layer in turn would also make its requests asynchronously? The logic of juggling all the callbacks is hurting my brain. Are there any resources out there for this type of approach?
If you can stand to introduce a new language, F# is terribly good at writing asynchronous code, one of its main strengths, IMHO, aside from its conciseness. Writing async code looks almost exactly like linear non-async code!
Related links:
If you don’t want to introduce a new language, here is a technique for using iterators to simplify your code: