Mastering Cloud Development using Microsoft Azure

Handling orders

As mentioned earlier, receiving an order is not just a matter of writing a row in a database. In real-world scenarios, an incoming e-commerce order triggers several business procedures. Some of them are as follows:

• Notifying the warehouse set for the delivery
• Notifying the sales agent to perform appropriate actions on the CRM
• Notifying payment information to the financial department

We can achieve these with two opposite approaches:

• Push approach: The application receiving an order "pushes" the notification to the involved systems
• Pull approach: The involved systems periodically checks for changes into a specific place in order to start business rules

Both approaches have advantages/disadvantages. They are explained in the following table: ...