Application Architecture
الوحدة 1
Layered Architecture
The most widely used application structure there is: what layering actually buys, the difference between closed and open layers, and the two failure modes that give it its reputation.
32 min2 lessons
ابدأ الوحدةما ستصبح قادرًا عليه
- Explain what a layer boundary protects and what it costs on every request.
- Distinguish closed from open layers and choose between them deliberately.
- Recognise the sinkhole and pass-through failures and respond proportionately.
- Place transactions, validation and mapping in the layer where they belong.
- Judge when layering is the right choice and when a different structure serves better.
- 11 min
01What a Layer Actually Buys
Layers are a dependency rule, not a folder convention: everything above may depend on what is below, and nothing below may know what is above.
- 11 min
02Making Layers Hold in a Real Codebase
Where transactions, validation and authorisation belong; why layering degrades quietly; and the mechanical checks that keep it honest.
Layered Architecture
6 questions · pass at 75%