EventHub

EventHub is an advanced event management platform built using modern software design principles and patterns. This README serves as a guide for understanding the architecture, folder structure, patterns, and deployment details of the application.

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Solution Structure

The project is structured as follows:

EventHub
├── deploy
│   ├── .dockerignore
│   ├── docker-compose.yml
│   ├── docker-compose.development.yml
│   └── docker-compose.production.yml
├── Solution Items
│   ├── .editorconfig
│   ├── .gitignore
│   ├── .gitlab-ci.yml
│   ├── Directory.Build.props
│   ├── LICENSE.txt
│   └── README.md
└── source
    ├── EventHub.Application
    ├── EventHub.Domain
    ├── EventHub.Domain.Shared
    ├── EventHub.Infrastructure
    ├── EventHub.Infrastructure.Persistence
    ├── EventHub.Infrastructure.SignalR
    └── EventHub.Presentation

Explanation of Folders

• deploy/: Contains Docker-related configuration files, including Docker Compose files for development and production environments.
• Solution Items/: Stores solution-level configuration files, CI/CD configuration (.gitlab-ci.yml), and other supporting documents such as the README and license.
• source/: Contains the main source code, organized by Clean Architecture principles:
  • EventHub.Application: Application layer with use cases and business rules.
  • EventHub.Domain: Domain layer with core business logic and entities.
  • EventHub.Domain.Shared: Shared utilities and functionality, enhancing reusability.
  • EventHub.Infrastructure: Infrastructure layer for external services.
  • EventHub.Infrastructure.Persistence: Handles database communications.
  • EventHub.Infrastructure.SignalR: Manages real-time communication using SignalR.
  • EventHub.Presentation: Presentation layer for API endpoints and UI components.

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Applied Architecture and Design Patterns

Clean Architecture

Clean Architecture ensures a clear separation of concerns, fostering maintainable and scalable code:

• Domain Layer (EventHub.Domain): Encapsulates core business logic and entities.
• Application Layer (EventHub.Application): Contains use cases and application-specific business rules.
• Infrastructure Layer (EventHub.Infrastructure): Manages external services, including database interactions and third-party integrations.
• Presentation Layer (EventHub.Presentation): Handles user interface and API endpoints.
• Persistence Module (EventHub.Infrastructure.Persistence): A specialized component within Infrastructure to manage database communications.
• Shared Module (EventHub.Domain.Shared): Contains common utilities and shared functionality, improving reusability across layers without violating Clean Architecture principles.
• SignalR Module (EventHub.Infrastructure.SignalR): Manages real-time communication using SignalR for WebSocket-based interactions.

Repository Pattern

Facilitates an abstraction layer for data access:

• Includes both standard and cached repositories, utilizing Redis for enhanced performance.

Unit of Work Pattern

Ensures consistent and atomic database operations:

• Combines multiple repositories within a single UnitOfWork class for transaction management.

Domain-Driven Design (DDD)

Focuses on modeling the core business domain:

• Aligns software design with business requirements to improve quality and maintainability.

CQRS Pattern

Separates command (write) and query (read) responsibilities:

• A single database is used for both operations in this implementation.

Transactional Outbox Pattern & Idempotency

Ensures reliable and consistent event sourcing:

• Prevents duplicate events and ensures successful message delivery using Hangfire for email notifications.

Additional Design Patterns

• Decorator Pattern: Enhances object functionality dynamically.
• Factory Pattern: Centralizes object creation logic.
• Singleton Pattern: Managed through .NET Dependency Injection.

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Continuous Integration and Deployment (CI/CD)

The project includes a CI/CD pipeline configured for deployment on Azure App Service. Use it as a reference for deploying your applications to Azure.

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How to Run the Application (Development Environment)

Step 1: Run Docker Compose

Run the following command to start the required services. Ensure the correct path for the Docker Compose file based on your current working directory:

docker-compose -f deploy/docker-compose.development.yml -p eventhub up -d --remove-orphans

Step 2: Run Migrations (First-Time Setup)

Run migrations to set up the database schema. See the "Run Migrations" section for details.

Step 3: Start the Application

• HTTP (Development Environment): Starts the application with the Development configuration.
• HTTPS (Production Environment): Starts the application with the Production configuration.

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Run Migrations

Ensure you are in the /source directory before running these commands.

Add a New Migration

Replace <your-migration-name> with your desired migration name:

dotnet ef migrations add <your-migration-name> --startup-project EventHub.Presentation --project EventHub.Infrastructure.Persistence --output-dir ../EventHub.Infrastructure.Persistence/Migrations

Apply Migrations

Run the following command to update the database schema after adding a new migration:

dotnet ef database update --startup-project EventHub.Presentation --project EventHub.Infrastructure.Persistence

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By adhering to robust design principles and patterns, EventHub delivers a reliable and scalable solution for event management. Explore, contribute, and make the most of this project!