.NET 8 Backend Bootcamp: Modulith, VSA, DDD, CQRS and Outbox | Udemy

In this bootcamp, you’ll learn how to build robust, scalable, and maintainable applications using cutting-edge technologies and architectural patterns.

We will develop;

1. Modular Monoliths (Modulith) Architecture
2. Vertical Slice Architecture (VSA)
3. Domain-Driven Design (DDD)
4. Command Query Responsibility Segregation (CQRS)
5. Outbox Pattern for Reliable Messaging

We start with the basics and progressively dive deeper into each topic. You’ll get hands-on experience building a complete EShop Modular Monolith application, implementing features like CQRS and the Outbox pattern.

• We’ll follow CQRS (Command Query Responsibility Segregation) and Vertical Slice architectures for module development.
• Modules will communicate over In-process method calls-public APIs and use RabbitMQ for event-driven communication.
• We’ll secure our APIs with Keycloak, using OpenID Connect and Bearer Tokens.
• We’ll implement the Outbox Pattern for reliable messaging between modules.

Along with this you’ll develop following modules and items:

Catalog module which;

• Using Asp.Net Core Minimal APIs and latest features of .Net8 and C# 12
• Develop Vertical Slice Architecture implementation with Feature folders
• Develop DDD, CQRS Patterns using MediatR library w/ following Best Practices
• Use Domain Events & Integration Events when UpdatePriceChanged event
• Use Entity Framework Core Code-First Approach and Migrations on PostgreSQL Database
• Use Carter for expose Minimal Api endpoints
• Cross-cutting Concerns including Logging with Serilog, Validation with MediatR Pipeline Behaviors, Exceptions, Pagination

Basket module which includes;

• Similar to Catalog Module; Develop DDD, CQRS, Vertical Slice Architecture implementation

  Additionally;

• Using Redis as a Distributed Cache over PostgreSQL database
• Develop and Implements Proxy, Decorator and Cache-aside patterns
• Publish BasketCheckoutEvent to RabbitMQ via MassTransit library
• Implement Outbox Pattern For Reliable Messaging w/ BasketCheckout Use Case

Module Communications;

• Sync Communications between Catalog and Basket Modules with In-process Method Calls (Public APIs)
• Async Communications between Modules w/ RabbitMQ & MassTransit for UpdatePrice Between Catalog-Basket Modules

Identity Module which includes;   

• Develop User Identity Module with Keycloak Authentication
• OAuth2 + OpenID Connect Flows with Keycloak
• Setup Keycloak into Docker-compose file for Identity Provider as a Backing Service
• Secure EShop Modules with Keycloak OpenId Connect in AspNet
• JwtBearer token for OpenID Connect with Keycloak Identity

Ordering Module which includes;

• Similar to the Catalog and Basket Module; Develop DDD, CQRS, Vertical Slice Architecture implementation
• Implement Outbox Pattern For Reliable Messaging w/ BasketCheckout Use Case

Lastly, we will discuss

• Migrating to Microservices: EShop Modules to Microservices w/ Stranger Fig Pattern

This course is more than just learning .NET, it’s a deep dive into the world of Modular Monoliths with Vertical-Slice Architecture, Domain-Driven Design (DDD), CQRS, and advanced architectural patterns for Backend Development.