ECommerce Shoppping Cart

Business Capabilities

Each user has his/her owned shopping cart. The shopping cart will be saved as long as the user not checkout.

User can add/remove items from shopping cart. These action will be tracked for recommendation and shopper tracking perpose.

Setup

Deploy

Service Information

 Dev Machine Url : http://localhost:5000
 Port:5000

Endpoints

Name	Url
Shopping Cart	/shoppingcart/
Events	/events/

Event Feed

Name	Description
ItemsAddedToCartEvent	happend when user add items into cart
ItemsRemovedFromCartEvent	happend when user remove items from cart

Ownership of data

Central Database Store Procedure

Shopping Cart

 Name:
 Params:
 Result:

EventStore

 Name:
 Params:
 Result:

Read-Optimizing Database Store Procedure

Shopping Cart

 Name:
 Params:
 Result:

EventStore

 Name:
 Params:
 Result:

Event Store

Locality of data

Catching

The purpose of caching:

• To eliminate the need, in many cases, to request information the caller already has

• To eliminate the need, in many other situations, to send full HTTP responses

Mirror data

Replacing a query to another microservice with a query to the microservice’s own database by creating a read model: a data model that can be queried easily and efficiently.

Read models are often based on events from other microservices.

Read models can also be built from responses to queries to other microservices