In this part we are going to design our e-commerce application with the monolithic architecture step by step. We will iterate the architecture design one by one as per requirements.

In every case, before we design the architecture, We should always start with writing down FRs and NFRs. So lets write down FRs.

Functional Requirements

List products

Filter products as per brand and categories

Put products into the shopping cart

Apply coupon for discounts and see the total cost all for all of the items in shopping cart

Checkout the shopping cart and create an order

List my old orders and order items history

Lets write down N-FR.

Non-Functional Requirements

Availability

Scalability

Its good to add principles in our picture in order to remember them always.

Principles

DRY

KISS

YAGNI

We are going to consider these principles when design our architecture.

Now we can consider to Database and Components of e-commerce application.