Microservices Demo

A microservice architecture is consists of services that have single responsibilities and do one thing well and implement a single business capability.

Service	Language	Description
frontend	Go	Exposes an HTTP server to serve the website. Does not require signup/login and generates session IDs for all users automatically.
cartservice	Go	Stores the items in the user's shopping cart in Redis and retrieves it.
catalogservice	Go	Provides the list of products from PostgreSQL searchs products and get individual products.
paymentservice	Node.js	Charges the given credit card info (mock) with the given amount and returns a transaction ID.
shippingservice	Go	Gives shipping cost estimates based on the shopping cart. Ships items to the given address (mock).
emailservice	Go	Sends users an order confirmation email (mock).
identityservice	Go	Generates token and sends it to krakend to be signed and make operations on user .
checkoutservice	Go	Retrieves user cart, prepares order and plays a role as producer for the payment, shipping and the email services through rabbitmq.
api-gateway	Krakend	Sits between frontend and backend microservices and handles incoming requests and forward them to necessary services.
[rabbitmq]	RabbitMQ	Provides async. communication between checkout, payment, shipping and email services via fanout exchange.
[user-db]	RabbitMQ	Stores user information.
[catalog-db]	RabbitMQ	Stores product information.
[redis]	Redis	Caches users' basket for 3 hours in map inside set structure.