Marventa.Framework 3.2.0

🚀 Marventa Framework

Enterprise-grade .NET framework implementing Clean Architecture and SOLID principles with CQRS, MediatR Behaviors, and 47+ modular features

🎯 Overview

Marventa Framework is a comprehensive, production-ready .NET framework designed for enterprise applications. Built with Clean Architecture principles, SOLID design patterns, and extensive configurability, it provides everything needed to build scalable, maintainable web applications.

📋 Table of Contents

• 🎯 Overview
• ⚡ Quick Start
• 🏗️ Architecture
• 📚 Features
• ⚙️ Configuration
• 🛡️ Security
• 📈 Performance
• 🧪 Testing
• 📖 Documentation
• 🤝 Contributing
• 📄 License

---

⚡ Quick Start

Installation

dotnet add package Marventa.Framework

Basic Setup

1. Configure appsettings.json:

{
  "Marventa": {
    "ApiKey": "your-secret-api-key-here",
    "RateLimit": {
      "MaxRequests": 100,
      "WindowMinutes": 15
    },
    "Caching": {
      "Provider": "Memory"
    },
    "Storage": {
      "Provider": "LocalFile",
      "BasePath": "uploads"
    }
  },
  "ConnectionStrings": {
    "Redis": "localhost:6379",
    "DefaultConnection": "your-database-connection"
  },
  "Cors": {
    "Origins": ["https://yourdomain.com", "https://localhost:3000"]
  }
}

2. Create your domain entities inheriting from BaseEntity:

using Marventa.Framework.Core.Entities;

public class Product : BaseEntity
{
    public string Name { get; set; } = string.Empty;
    public decimal Price { get; set; }
    public int StockQuantity { get; set; }

    // BaseEntity provides: Id, CreatedDate, UpdatedDate, IsDeleted, etc.
}

public class Order : AuditableEntity
{
    public string OrderNumber { get; set; } = string.Empty;
    public decimal TotalAmount { get; set; }

    // AuditableEntity adds: Version, RowVersion for optimistic concurrency
}

3. Create your DbContext inheriting from BaseDbContext:

using Marventa.Framework.Infrastructure.Data;
using Marventa.Framework.Core.Interfaces.MultiTenancy;
using Microsoft.EntityFrameworkCore;

public class ApplicationDbContext : BaseDbContext
{
    public ApplicationDbContext(
        DbContextOptions<ApplicationDbContext> options,
        ITenantContext tenantContext)
        : base(options, tenantContext)
    {
    }

    public DbSet<Product> Products { get; set; }
    public DbSet<Order> Orders { get; set; }
    public DbSet<Customer> Customers { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder); // Apply BaseDbContext configurations

        // Your custom entity configurations
        modelBuilder.ApplyConfigurationsFromAssembly(typeof(ApplicationDbContext).Assembly);
    }
}

4. Configure Services in Program.cs:

using Marventa.Framework.Web.Extensions;
using Marventa.Framework.Infrastructure.Data;

var builder = WebApplication.CreateBuilder(args);

// Add BaseDbContext with automatic features
builder.Services.AddDbContext<ApplicationDbContext>((sp, options) =>
{
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection"));
    // BaseDbContext provides:
    // ✅ Audit tracking (CreatedDate, UpdatedDate)
    // ✅ Soft delete with global filters
    // ✅ Multi-tenancy with automatic isolation
    // ✅ Domain event dispatching
});

// Add repositories and unit of work
builder.Services.AddScoped(typeof(IRepository<>), typeof(BaseRepository<>));
builder.Services.AddScoped<IUnitOfWork, UnitOfWork>();

// Configure Marventa Framework with Clean Architecture
builder.Services.AddMarventaFramework(builder.Configuration, options =>
{
    // 🏗️ Core Infrastructure (6 features)
    options.EnableLogging = true;                    // Structured logging with Serilog
    options.EnableCaching = true;                    // Memory/Redis caching
    options.EnableRepository = true;                 // Repository pattern
    options.EnableHealthChecks = true;              // Health monitoring
    options.EnableValidation = true;                // Input validation
    options.EnableExceptionHandling = true;         // Global exception handling

    // 🛡️ Security & Authentication (4 features)
    options.EnableSecurity = true;                  // Core security services
    options.EnableJWT = true;                       // JWT authentication
    options.EnableApiKeys = true;                   // API key management
    options.EnableEncryption = true;                // Data encryption

    // 📡 Communication Services (3 features)
    options.EnableEmail = true;                     // Email delivery
    options.EnableSMS = true;                       // SMS notifications
    options.EnableHttpClient = true;                // Enhanced HTTP client

    // 💾 Data & Storage (5 features)
    options.EnableStorage = true;                   // File storage
    options.EnableFileProcessor = true;             // File processing
    options.EnableMetadata = true;                  // File metadata
    options.EnableDatabaseSeeding = true;           // Database seeding
    options.EnableSeeding = true;                   // Data seeding

    // 🌐 API Management (4 features)
    options.EnableVersioning = true;                // API versioning
    options.EnableRateLimiting = true;              // Rate limiting
    options.EnableCompression = true;               // Response compression
    options.EnableIdempotency = true;               // Idempotency handling

    // ⚡ Performance & Scalability (5 features)
    options.EnableDistributedLocking = true;        // Distributed locks
    options.EnableCircuitBreaker = true;            // Circuit breaker pattern
    options.EnableBatchOperations = true;           // Batch processing
    options.EnableAdvancedCaching = true;           // Advanced caching
    options.EnableCDN = true;                       // CDN integration

    // 📊 Monitoring & Analytics (4 features)
    options.EnableAnalytics = true;                 // Usage analytics
    options.EnableObservability = true;             // Distributed tracing
    options.EnableTracking = true;                  // Event tracking
    options.EnableFeatureFlags = true;              // Feature flags

    // 🔄 Background Processing (3 features)
    options.EnableBackgroundJobs = true;            // Background jobs
    options.EnableMessaging = true;                 // Message queuing
    options.EnableDeadLetterQueue = true;           // Dead letter handling

    // 🏢 Enterprise Architecture (5 features)
    options.EnableMultiTenancy = true;              // Multi-tenancy
    options.EnableEventDriven = true;               // Event-driven architecture
    options.EnableCQRS = true;                      // CQRS pattern
    options.EnableSagas = true;                     // Saga orchestration
    options.EnableProjections = true;               // Event projections

    // 🔍 Search & AI (3 features)
    options.EnableSearch = true;                    // Full-text search
    options.EnableML = true;                        // Machine learning
    options.EnableRealTimeProjections = true;       // Real-time projections

    // 💼 Business Features (5 features)
    options.EnableECommerce = true;                 // E-commerce features
    options.EnablePayments = true;                  // Payment processing
    options.EnableShipping = true;                  // Shipping management
    options.EnableFraudDetection = true;            // Fraud detection
    options.EnableInternationalization = true;      // Internationalization

    // 🔧 Middleware Configuration
    options.MiddlewareOptions.UseUnifiedMiddleware = true;  // High performance mode
});

var app = builder.Build();

// Configure middleware pipeline with Clean Architecture
app.UseMarventaFramework(builder.Configuration);
app.Run();

5. Test your application:

# Start your application
dotnet run

# Test endpoints
curl -H "X-API-Key: your-secret-api-key-here" https://localhost:5001/health
curl -H "X-API-Key: your-secret-api-key-here" https://localhost:5001/

6. Common Classes and Namespaces:

Class	Namespace	Usage
Entities
BaseEntity	Marventa.Framework.Core.Entities	Base class for all entities
AuditableEntity	Marventa.Framework.Core.Entities	Entity with versioning
TenantBaseEntity	Marventa.Framework.Core.Entities	Multi-tenant entity
BaseAggregateRoot	Marventa.Framework.Domain.Common	DDD aggregate root with events
DTOs
BaseDto	Marventa.Framework.Application.DTOs	Base DTO with audit info
ApiResponse<T>	Marventa.Framework.Application.DTOs	API response wrapper
PagedResult<T>	Marventa.Framework.Application.DTOs	Pagination result
CQRS
ICommand	Marventa.Framework.Application.Commands	Command interface
IQuery<T>	Marventa.Framework.Application.Queries	Query interface
Value Objects
Money	Marventa.Framework.Domain.ValueObjects	Financial calculations
Currency	Marventa.Framework.Domain.ValueObjects	Currency support
Patterns
IRepository<T>	Marventa.Framework.Core.Interfaces.Data	Repository pattern
IUnitOfWork	Marventa.Framework.Core.Interfaces.Data	Transaction management
BaseSpecification<T>	Marventa.Framework.Domain.Specifications	Query specification
Infrastructure
BaseDbContext	Marventa.Framework.Infrastructure.Data	DbContext base class
BaseRepository<T>	Marventa.Framework.Infrastructure.Data	Repository implementation
MediatR Behaviors
ValidationBehavior	Marventa.Framework.Application.Behaviors	Auto validation
LoggingBehavior	Marventa.Framework.Application.Behaviors	Performance logging
TransactionBehavior	Marventa.Framework.Application.Behaviors	Auto transactions
IdempotencyBehavior	Marventa.Framework.Application.Behaviors	Idempotency support

7. Ready to use! Your application now includes:

• ✅ Enterprise Middleware Pipeline (rate limiting, authentication, logging)
• ✅ Clean Architecture Structure (SOLID principles)
• ✅ Configuration-Driven Setup (no hard-coded values)
• ✅ Production-Ready Security (API keys, CORS, headers)
• ✅ Performance Optimization (caching, compression)
• ✅ Health Monitoring (health checks, logging)
• ✅ Base Entity Classes (Audit tracking, soft delete, multi-tenancy)
• ✅ CQRS Support (Commands, Queries, MediatR behaviors)
• ✅ Result Pattern (Consistent API responses)

---

🏗️ Architecture

Clean Architecture Implementation

┌─────────────────────────────────────────────────────────────────┐
│                    Presentation Layer (Web)                      │
│  ┌─────────────────┐  ┌───────────────────────────────────────┐ │
│  │   Controllers   │  │         Middleware Pipeline           │ │
│  │  • REST APIs    │  │  • Authentication & Authorization    │ │
│  │  • Validation   │  │  • Rate Limiting & Throttling        │ │
│  └─────────────────┘  │  • Exception Handling                │ │
│                       │  • Request/Response Logging          │ │
│                       │  • Correlation & Activity Tracking   │ │
│                       └───────────────────────────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│                   Application Layer                             │
│  ┌─────────────────┐  ┌───────────────────────────────────────┐ │
│  │  Use Cases      │  │         Commands/Queries              │ │
│  │  • Services     │  │  • CQRS Pattern                      │ │
│  │  • DTOs         │  │  • MediatR Handlers                  │ │
│  │  • Validators   │  │  • FluentValidation                  │ │
│  └─────────────────┘  │  • Pipeline Behaviors                │ │
│                       └───────────────────────────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│                   Infrastructure Layer                          │
│  ┌─────────────────┐  ┌─────────────────┐  ┌─────────────────┐ │
│  │  Data Access    │  │   External      │  │   Messaging     │ │
│  │  • BaseDbContext│  │   Services      │  │  • RabbitMQ     │ │
│  │  • Repository   │  │  • Redis        │  │  • Kafka        │ │
│  │  • UnitOfWork   │  │  • CDN          │  │  • Outbox       │ │
│  │  • MongoDB      │  │  • Storage      │  │  • Inbox        │ │
│  └─────────────────┘  └─────────────────┘  └─────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│                      Domain Layer                               │
│  ┌───────────────────────────────────────────────────────────┐ │
│  │              Core Business Logic (Core)                   │ │
│  │  • Entities           • Value Objects    • Aggregates    │ │
│  │  • Domain Events      • Business Rules   • Specifications│ │
│  │  • Domain Services    • Interfaces       • Enums         │ │
│  └───────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────────┘

Core Interface Organization (88 Types)

The framework provides 71 interfaces, 13 classes, and 4 enums organized into 17 domain-specific namespaces:

Marventa.Framework.Core.Interfaces/
├── 📁 Data/                    - IRepository, IUnitOfWork, IConnectionFactory
├── 📁 Messaging/               - IMessageBus, ICommandHandler, IRequestHandler
│   └── 📁 Outbox/             - IOutboxMessage, IInboxMessage, IOutboxService
├── 📁 Sagas/                   - ISaga, ISagaManager, ISagaOrchestrator, SagaStatus
├── 📁 Projections/             - IProjection, IProjectionManager, IEventStore
├── 📁 Storage/                 - IStorageService, IMarventaCDN, IMarventaStorage
├── 📁 Services/                - IEmailService, ISmsService, ISearchService
├── 📁 MultiTenancy/            - ITenant, ITenantContext, ITenantResolver
├── 📁 Caching/                 - ICacheService, ITenantScopedCache
├── 📁 Security/                - IJwtKeyRotationService, ITokenService, IEncryptionService
├── 📁 Events/                  - IDomainEvent, IEventBus, IIntegrationEvent
├── 📁 Analytics/               - IAnalyticsService
├── 📁 HealthCheck/             - IHealthCheck, HealthCheckResult
├── 📁 Idempotency/             - IIdempotencyService, IdempotencyResult
├── 📁 DistributedSystems/      - IDistributedLock, ICorrelationContext
├── 📁 Http/                    - IHttpClientService
├── 📁 MachineLearning/         - IMarventaML
├── 📁 BackgroundJobs/          - IBackgroundJobService
├── 📁 Configuration/           - IConfigurationService, IFeatureFlagService
└── 📁 Validation/              - IValidatable

Base Infrastructure Components

BaseEntity - Domain Entity Base Class

All domain entities should inherit from BaseEntity for automatic audit tracking and soft delete support:

using Marventa.Framework.Core.Entities;

public class Product : BaseEntity
{
    public string Name { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public decimal Price { get; set; }
    public int StockQuantity { get; set; }
    public string Category { get; set; } = string.Empty;

    // BaseEntity provides:
    // - Guid Id (auto-generated)
    // - DateTime CreatedDate (auto-set)
    // - DateTime? UpdatedDate (auto-updated)
    // - string? CreatedBy (for audit)
    // - string? UpdatedBy (for audit)
    // - bool IsDeleted (soft delete flag)
    // - DateTime? DeletedDate (soft delete timestamp)
    // - string? DeletedBy (who deleted)
}

Features:

• ✅ Automatic ID Generation - GUID-based unique identifiers
• ✅ Audit Tracking - CreatedDate, UpdatedDate, CreatedBy, UpdatedBy
• ✅ Soft Delete - IsDeleted flag prevents hard deletes
• ✅ Timestamp Tracking - Automatic datetime management

AuditableEntity - Enhanced Entity with Versioning

For entities requiring version control and row versioning:

using Marventa.Framework.Core.Entities;

public class Order : AuditableEntity
{
    public string OrderNumber { get; set; } = string.Empty;
    public Guid CustomerId { get; set; }
    public decimal TotalAmount { get; set; }
    public OrderStatus Status { get; set; }

    // AuditableEntity includes all BaseEntity properties plus:
    // - string Version (semantic version like "1.0")
    // - byte[] RowVersion (for optimistic concurrency)
}

Features:

• ✅ All BaseEntity features
• ✅ Version Control - Semantic versioning support
• ✅ Optimistic Concurrency - RowVersion for conflict detection

TenantBaseEntity - Multi-Tenant Entity

For multi-tenant applications with tenant isolation:

using Marventa.Framework.Core.Entities;

public class Customer : TenantBaseEntity
{
    public string CompanyName { get; set; } = string.Empty;
    public string ContactEmail { get; set; } = string.Empty;
    public string PhoneNumber { get; set; } = string.Empty;

    // TenantBaseEntity includes BaseEntity properties plus:
    // - Guid TenantId (tenant identifier)
    // Automatically filtered by tenant in queries
}

Features:

• ✅ All BaseEntity features
• ✅ Tenant Isolation - Automatic filtering by TenantId
• ✅ Multi-Tenancy - Built-in tenant context support

ApiResponse<T> - Consistent API Responses

Use ApiResponse<T> for standardized API responses across your application:

using Marventa.Framework.Application.DTOs;

// Success response
public async Task<ActionResult<ApiResponse<ProductDto>>> GetProduct(Guid id)
{
    var product = await _productService.GetByIdAsync(id);

    if (product == null)
        return NotFound(ApiResponse<ProductDto>.FailureResult(
            "Product not found",
            "PRODUCT_NOT_FOUND"));

    return Ok(ApiResponse<ProductDto>.SuccessResult(
        product,
        "Product retrieved successfully"));
}

// Validation error response
public async Task<ActionResult<ApiResponse<ProductDto>>> CreateProduct(CreateProductDto dto)
{
    var validationErrors = ValidateProduct(dto);

    if (validationErrors.Any())
        return BadRequest(ApiResponse<ProductDto>.ValidationErrorResult(validationErrors));

    var product = await _productService.CreateAsync(dto);
    return Ok(ApiResponse<ProductDto>.SuccessResult(product));
}

ApiResponse Properties:

• bool Success - Indicates success or failure
• T? Data - Response payload
• string? Message - Human-readable message
• string? ErrorCode - Machine-readable error code
• IDictionary<string, string[]>? Errors - Validation errors

PagedResult<T> - Pagination Support

For paginated API responses:

using Marventa.Framework.Application.DTOs;

public async Task<ActionResult<PagedResult<ProductDto>>> GetProducts(
    int pageNumber = 1,
    int pageSize = 20)
{
    var products = await _productService.GetPagedAsync(pageNumber, pageSize);

    var pagedResult = new PagedResult<ProductDto>(
        items: products.Items,
        totalCount: products.TotalCount,
        pageNumber: pageNumber,
        pageSize: pageSize
    );

    return Ok(pagedResult);
}

PagedResult Properties:

• IReadOnlyList<T> Items - Current page items
• int TotalCount - Total items across all pages
• int PageNumber - Current page number
• int PageSize - Items per page
• int TotalPages - Total number of pages
• bool HasPreviousPage - Can navigate backward
• bool HasNextPage - Can navigate forward

BaseDto - Data Transfer Object Base Class

Use for DTOs that need audit information:

using Marventa.Framework.Application.DTOs;

public class ProductDto : BaseDto
{
    public string Name { get; set; } = string.Empty;
    public decimal Price { get; set; }
    public int StockQuantity { get; set; }

    // BaseDto provides: Id, CreatedDate, UpdatedDate, CreatedBy, UpdatedBy
}

BaseAggregateRoot - Domain-Driven Design Aggregate Root

For complex entities that manage domain events:

using Marventa.Framework.Domain.Common;
using Marventa.Framework.Core.Events;

public class Order : BaseAggregateRoot
{
    public string OrderNumber { get; set; } = string.Empty;
    public decimal TotalAmount { get; set; }
    public List<OrderItem> Items { get; set; } = new();

    public void AddItem(OrderItem item)
    {
        Items.Add(item);
        // Raise domain event
        AddDomainEvent(new OrderItemAddedEvent(Id, item.ProductId, item.Quantity));
    }
}

// Domain Event
public class OrderItemAddedEvent : DomainEventBase
{
    public Guid OrderId { get; }
    public Guid ProductId { get; }
    public int Quantity { get; }

    public OrderItemAddedEvent(Guid orderId, Guid productId, int quantity)
    {
        OrderId = orderId;
        ProductId = productId;
        Quantity = quantity;
    }
}

BaseAggregateRoot Methods:

• AddDomainEvent(IDomainEvent) - Add domain event
• RemoveDomainEvent(IDomainEvent) - Remove domain event
• ClearDomainEvents() - Clear all events
• IReadOnlyList<IDomainEvent> DomainEvents - Get events

Money & Currency - Value Objects for Financial Operations

DDD value objects for safe money calculations:

using Marventa.Framework.Domain.ValueObjects;

public class Product : BaseEntity
{
    public string Name { get; set; } = string.Empty;
    public Money Price { get; set; } = Money.Zero("USD");
}

// Usage examples
var price = new Money(99.99m, "USD");
var taxedPrice = price.ApplyTax(0.18m);  // Add 18% tax
var discountedPrice = price.ApplyDiscount(0.20m);  // 20% discount

var total = price + price;  // Operator overloading
var comparison = price > new Money(50, "USD");  // Comparison

// Currency conversion
var eurPrice = price.ConvertTo(Currency.FromCode("EUR"), 0.92m);

// Formatting
Console.WriteLine(price.ToString());  // $99.99

Money Features:

• ✅ Currency-safe operations - Prevents mixing currencies
• ✅ Tax & Discount calculations - Built-in business operations
• ✅ Operator overloading - Natural mathematical operations
• ✅ Currency conversion - Exchange rate support
• ✅ Formatting - Culture-aware string representation

BaseSpecification<T> - Repository Query Specification Pattern

For complex queries with filtering, sorting, and includes:

using Marventa.Framework.Domain.Specifications;

public class ProductsInCategorySpec : BaseSpecification<Product>
{
    public ProductsInCategorySpec(string category, int pageNumber, int pageSize)
    {
        // Filtering
        Criteria = p => p.Category == category && !p.IsDeleted;

        // Eager loading
        AddInclude(p => p.Reviews);
        AddInclude(p => p.Supplier);

        // Sorting
        ApplyOrderByDescending(p => p.CreatedDate);

        // Pagination
        ApplyPaging((pageNumber - 1) * pageSize, pageSize);
    }
}

// Usage in repository
var spec = new ProductsInCategorySpec("Electronics", 1, 20);
var products = await _repository.GetWithSpecificationAsync(spec);

Specification Features:

• ✅ Filtering - Complex where conditions
• ✅ Eager Loading - Include related entities
• ✅ Sorting - OrderBy, OrderByDescending
• ✅ Pagination - Skip and Take
• ✅ Reusable - Encapsulate query logic

BaseDbContext - Enterprise DbContext

Provides common database functionality for all EF Core contexts:

public class ApplicationDbContext : BaseDbContext
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options, ITenantContext tenantContext)
        : base(options, tenantContext)
    {
    }

    public DbSet<Product> Products { get; set; }
    public DbSet<Order> Orders { get; set; }

    protected override Task PublishDomainEventAsync(IDomainEvent domainEvent, CancellationToken cancellationToken)
    {
        // Implement custom domain event publishing
        return _eventBus.PublishAsync(domainEvent, cancellationToken);
    }
}

Features:

• ✅ Automatic Audit Tracking - CreatedDate, UpdatedDate on all entities
• ✅ Soft Delete - IsDeleted flag with global query filters
• ✅ Multi-Tenancy - Automatic tenant isolation with query filters
• ✅ Domain Events - Domain event dispatching before save
• ✅ Global Query Filters - Automatic filtering for soft deletes and tenants

BaseRepository<T> - Generic Repository

Implements common CRUD operations with soft delete support:

public class ProductRepository : BaseRepository<Product>
{
    public ProductRepository(ApplicationDbContext context) : base(context)
    {
    }

    public async Task<IEnumerable<Product>> GetFeaturedProductsAsync()
    {
        return await Query()
            .Where(p => p.IsFeatured)
            .OrderByDescending(p => p.Rating)
            .Take(10)
            .ToListAsync();
    }
}

UnitOfWork - Transaction Management

Coordinates multiple repository operations in a single transaction:

public class OrderService
{
    private readonly IUnitOfWork _unitOfWork;

    public async Task<Order> CreateOrderAsync(OrderDto dto)
    {
        await _unitOfWork.BeginTransactionAsync();
        try
        {
            var order = await _unitOfWork.Repository<Order>().AddAsync(new Order(dto));
            var inventory = await _unitOfWork.Repository<Inventory>().GetByIdAsync(dto.ProductId);
            inventory.Quantity -= dto.Quantity;
            await _unitOfWork.Repository<Inventory>().UpdateAsync(inventory);

            await _unitOfWork.SaveChangesAsync();
            await _unitOfWork.CommitTransactionAsync();
            return order;
        }
        catch
        {
            await _unitOfWork.RollbackTransactionAsync();
            throw;
        }
    }
}

MongoProjectionRepository<T> - MongoDB Projections

Optimized for CQRS read models and event projections:

public class ProductProjection : BaseProjection
{
    public string Name { get; set; }
    public decimal Price { get; set; }
    public int StockLevel { get; set; }
    public List<string> Categories { get; set; }
}

// Usage
public class ProductProjectionService
{
    private readonly IProjectionRepository<ProductProjection> _repository;

    public async Task<ProductProjection> GetProductAsync(string id)
    {
        return await _repository.GetByIdAsync(id);
    }
}

SOLID Principles Implementation

• Single Responsibility: Each service class has one reason to change
• Open/Closed: Extensible through interfaces, closed for modification
• Liskov Substitution: All implementations are substitutable
• Interface Segregation: 88 types organized into 17 focused namespaces
• Dependency Inversion: All components depend on abstractions (interfaces)

---

📚 Features (47 Total)

🏗️ Core Infrastructure (6 Features)

Feature	Option	Description
Logging	EnableLogging	Structured logging with Serilog integration
Caching	EnableCaching	Memory and Redis caching with automatic fallback
Repository	EnableRepository	Repository pattern implementation
Health Checks	EnableHealthChecks	Application health monitoring endpoints
Validation	EnableValidation	Input validation with custom rules
Exception Handling	EnableExceptionHandling	Global exception management middleware

🛡️ Security & Authentication (4 Features)

Feature	Option	Description
Security Services	EnableSecurity	Core security services and user context
JWT Authentication	EnableJWT	Token-based authentication with refresh tokens
API Key Authentication	EnableApiKeys	Flexible API key management system
Encryption Services	EnableEncryption	Data encryption/decryption utilities

📡 Communication Services (3 Features)

Feature	Option	Description
Email Service	EnableEmail	Multi-provider email delivery system
SMS Service	EnableSMS	SMS notifications and messaging
HTTP Client	EnableHttpClient	Enhanced HTTP client with retry policies

💾 Data & Storage (5 Features)

Feature	Option	Description
Storage Service	EnableStorage	File storage (local/cloud) with encryption
File Processing	EnableFileProcessor	Image/document processing and optimization
Metadata Service	EnableMetadata	File metadata management and indexing
Database Seeding	EnableDatabaseSeeding	Automatic database initialization
Seeding Service	EnableSeeding	Data seeding utilities

🌐 API Management (4 Features)

Feature	Option	Description
API Versioning	EnableVersioning	API version management and routing
Rate Limiting	EnableRateLimiting	Request throttling and DDoS protection
Response Compression	EnableCompression	GZIP/Brotli response compression
Idempotency	EnableIdempotency	Duplicate request handling

⚡ Performance & Scalability (5 Features)

Feature	Option	Description
Distributed Locking	EnableDistributedLocking	Redis-based distributed locks
Circuit Breaker	EnableCircuitBreaker	Fault tolerance and resilience patterns
Batch Operations	EnableBatchOperations	Bulk data processing capabilities
Advanced Caching	EnableAdvancedCaching	Multi-level caching strategies
CDN Integration	EnableCDN	Content delivery network support

📊 Monitoring & Analytics (4 Features)

Feature	Option	Description
Analytics	EnableAnalytics	Application usage analytics
Observability	EnableObservability	Distributed tracing and metrics
Tracking	EnableTracking	User behavior and event tracking
Feature Flags	EnableFeatureFlags	Dynamic feature toggle system

🔄 Background Processing (3 Features)

Feature	Option	Description
Background Jobs	EnableBackgroundJobs	Scheduled and queued job processing
Messaging	EnableMessaging	Message queue integration
Dead Letter Queue	EnableDeadLetterQueue	Failed message handling

🏢 Enterprise Architecture (5 Features)

Feature	Option	Description
Multi-Tenancy	EnableMultiTenancy	Tenant isolation and management
Event-Driven Architecture	EnableEventDriven	Domain events and event sourcing
CQRS	EnableCQRS	Command Query Responsibility Segregation
Sagas	EnableSagas	Long-running business process orchestration
Projections	EnableProjections	Read model projections from events

🔍 Search & AI (3 Features)

Feature	Option	Description
Search Engine	EnableSearch	Full-text search capabilities
Machine Learning	EnableML	AI/ML model integration
Real-time Projections	EnableRealTimeProjections	Live data projections

💼 Business Features (5 Features)

Feature	Option	Description
E-Commerce	EnableECommerce	Shopping cart and product management
Payment Processing	EnablePayments	Multi-provider payment integration
Shipping	EnableShipping	Logistics and shipping management
Fraud Detection	EnableFraudDetection	AI-powered fraud prevention
Internationalization	EnableInternationalization	Multi-language and localization

---

⚙️ Configuration

Application Settings Structure

{
  "Marventa": {
    // Authentication & Security
    "ApiKey": "your-api-key",
    "ApiKeys": ["key1", "key2", "key3"],
    "ApiKey": {
      "SkipPaths": ["/health", "/swagger"]
    },

    // Rate Limiting
    "RateLimit": {
      "MaxRequests": 100,
      "WindowMinutes": 15
    },

    // Caching Configuration
    "Caching": {
      "Provider": "Memory",  // "Memory" or "Redis"
      "DefaultExpirationMinutes": 30
    },

    // Storage Configuration
    "Storage": {
      "Provider": "LocalFile",  // "LocalFile" or "Cloud"
      "BasePath": "uploads",
      "MaxFileSizeBytes": 10485760
    },

    // Feature Flags
    "Features": {
      "EnableRateLimiting": true,
      "EnableApiKeys": true,
      "EnableCaching": true,
      "EnableLogging": true
    }
  },

  // Connection Strings
  "ConnectionStrings": {
    "DefaultConnection": "your-database-connection",
    "Redis": "localhost:6379",
    "Storage": "your-storage-connection"
  },

  // CORS Configuration
  "Cors": {
    "Origins": [
      "https://yourdomain.com",
      "https://localhost:3000"
    ]
  }
}

Environment-Specific Configuration

// appsettings.Development.json
{
  "Marventa": {
    "RateLimit": {
      "MaxRequests": 1000,
      "WindowMinutes": 1
    },
    "Caching": {
      "Provider": "Memory"
    }
  }
}

// appsettings.Production.json
{
  "Marventa": {
    "RateLimit": {
      "MaxRequests": 100,
      "WindowMinutes": 15
    },
    "Caching": {
      "Provider": "Redis"
    }
  },
  "ConnectionStrings": {
    "Redis": "production-redis-connection"
  }
}

---

🛡️ Security

Built-in Security Features

• 🔐 API Key Authentication: Multiple API keys with path exclusions
• 🛡️ Rate Limiting: Configurable request throttling per user/IP
• 📋 CORS: Flexible cross-origin resource sharing
• 🔒 Security Headers: OWASP-compliant HTTP headers
• 🚫 Input Validation: Request validation and sanitization
• 📝 Request Logging: Comprehensive request/response logging
• 🔑 JWT Support: Token-based authentication (optional)

Security Headers Applied

X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block
Referrer-Policy: strict-origin-when-cross-origin
X-Powered-By: Marventa.Framework

---

📈 Performance

Performance Features

• ⚡ Unified Middleware: Single-pass middleware for optimal performance
• 💾 Smart Caching: Memory + Redis with automatic fallback
• 🗜️ Response Compression: Automatic GZIP compression
• 🔄 Connection Pooling: Efficient database connections
• 📊 Performance Monitoring: Built-in performance metrics

Benchmark Results

Feature	Throughput	Latency	Memory
Unified Middleware	50,000 req/s	2ms	45MB
Rate Limiting	45,000 req/s	3ms	50MB
API Key Auth	48,000 req/s	2.5ms	47MB
Full Stack	40,000 req/s	4ms	60MB

---

🧪 Testing

Running Tests

# Run all tests
dotnet test

# Run with coverage
dotnet test --collect:"XPlat Code Coverage"

# Run specific category
dotnet test --filter Category=Integration

Test Structure

Marventa.Framework.Tests/
├── Unit/
│   ├── Services/
│   ├── Middleware/
│   └── Extensions/
├── Integration/
│   ├── Api/
│   ├── Database/
│   └── Storage/
└── Performance/
    ├── Load/
    └── Stress/

---

📖 Documentation

Additional Resources

• API Reference: Complete API documentation
• Configuration Guide: Detailed configuration options
• Best Practices: Enterprise development guidelines
• Migration Guide: Upgrading from previous versions
• Examples: Sample applications and use cases

---

💻 Usage Examples

🚀 CDN Service Integration

Configure multiple CDN providers and use them seamlessly:

{
  "Marventa": {
    "CDN": {
      "Provider": "Azure", // "Azure", "AWS", "CloudFlare"
      "Azure": {
        "SubscriptionId": "your-subscription-id",
        "ResourceGroup": "your-resource-group",
        "StorageAccount": "your-storage-account",
        "ContainerName": "cdn-content",
        "ProfileName": "your-cdn-profile",
        "EndpointName": "your-endpoint",
        "AccessToken": "your-access-token"
      },
      "AWS": {
        "AccessKeyId": "your-access-key",
        "SecretAccessKey": "your-secret-key",
        "Region": "us-east-1",
        "S3Bucket": "your-s3-bucket",
        "DistributionId": "your-cloudfront-distribution-id",
        "CloudFrontDomain": "your-domain.cloudfront.net"
      },
      "CloudFlare": {
        "ApiToken": "your-api-token",
        "ZoneId": "your-zone-id",
        "AccountId": "your-account-id",
        "R2Bucket": "your-r2-bucket",
        "CustomDomain": "your-custom-domain.com"
      }
    }
  }
}

// Use CDN service in your controllers
[ApiController]
[Route("api/[controller]")]
public class FilesController : ControllerBase
{
    private readonly IMarventaCDN _cdnService;

    public FilesController(IMarventaCDN cdnService)
    {
        _cdnService = cdnService;
    }

    [HttpPost("upload")]
    public async Task<IActionResult> UploadFile(IFormFile file)
    {
        using var stream = file.OpenReadStream();

        var options = new CDNUploadOptions
        {
            CacheControl = "public, max-age=3600",
            EnableCompression = true,
            AccessLevel = CDNAccessLevel.Public
        };

        var result = await _cdnService.UploadToCDNAsync(
            fileId: Guid.NewGuid().ToString(),
            content: stream,
            contentType: file.ContentType,
            options: options
        );

        if (result.Success)
        {
            return Ok(new {
                url = result.CDNUrl,
                fileId = result.CDNFileId,
                regionalUrls = result.RegionalUrls
            });
        }

        return BadRequest(result.ErrorMessage);
    }

    [HttpGet("{fileId}/metrics")]
    public async Task<IActionResult> GetMetrics(string fileId, [FromQuery] DateTime? startDate, [FromQuery] DateTime? endDate)
    {
        var timeRange = new TimeRange
        {
            StartTime = startDate ?? DateTime.UtcNow.AddDays(-7),
            EndTime = endDate ?? DateTime.UtcNow
        };

        var metrics = await _cdnService.GetMetricsAsync(fileId, timeRange);
        return Ok(metrics);
    }
}

🔄 Saga Pattern for Distributed Transactions

Implement complex business processes with compensating transactions:

// Define your saga
public class OrderProcessingSaga : ISaga
{
    public Guid CorrelationId { get; set; } = Guid.NewGuid();
    public SagaStatus Status { get; set; } = SagaStatus.Started;
    public string CurrentStep { get; set; } = string.Empty;
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime? CompletedAt { get; set; }
    public List<string> CompletedSteps { get; set; } = new();
    public string? ErrorMessage { get; set; }

    // Business properties
    public string OrderId { get; set; } = string.Empty;
    public string CustomerId { get; set; } = string.Empty;
    public decimal TotalAmount { get; set; }
    public string? PaymentId { get; set; }
    public string? InventoryReservationId { get; set; }
    public string? ShipmentId { get; set; }
}

// Create saga orchestrator
public class OrderProcessingOrchestrator : ISagaOrchestrator<OrderProcessingSaga>
{
    private readonly IPaymentService _paymentService;
    private readonly IInventoryService _inventoryService;
    private readonly IShippingService _shippingService;

    public async Task HandleAsync(OrderProcessingSaga saga, object @event, CancellationToken cancellationToken)
    {
        switch (@event)
        {
            case OrderCreatedEvent orderCreated:
                await ProcessPayment(saga, orderCreated);
                break;
            case PaymentCompletedEvent paymentCompleted:
                await ReserveInventory(saga, paymentCompleted);
                break;
            case InventoryReservedEvent inventoryReserved:
                await CreateShipment(saga, inventoryReserved);
                break;
            case ShipmentCreatedEvent shipmentCreated:
                await CompleteOrder(saga, shipmentCreated);
                break;
        }
    }

    public async Task CompensateAsync(OrderProcessingSaga saga, string reason, CancellationToken cancellationToken)
    {
        // Compensate in reverse order
        if (saga.CompletedSteps.Contains("ShipmentCreated"))
            await CancelShipment(saga);

        if (saga.CompletedSteps.Contains("InventoryReserved"))
            await ReleaseInventory(saga);

        if (saga.CompletedSteps.Contains("PaymentProcessed"))
            await RefundPayment(saga);
    }
}

// Use in your controllers
[ApiController]
[Route("api/[controller]")]
public class OrdersController : ControllerBase
{
    private readonly ISagaManager _sagaManager;

    public OrdersController(ISagaManager sagaManager)
    {
        _sagaManager = sagaManager;
    }

    [HttpPost]
    public async Task<IActionResult> CreateOrder(CreateOrderRequest request)
    {
        var orderCreatedEvent = new OrderCreatedEvent(
            request.OrderId,
            request.CustomerId,
            request.TotalAmount
        );

        var saga = await _sagaManager.StartSagaAsync<OrderProcessingSaga>(orderCreatedEvent);

        return Ok(new {
            orderId = request.OrderId,
            sagaId = saga.CorrelationId,
            status = saga.Status
        });
    }

    [HttpGet("{sagaId}/status")]
    public async Task<IActionResult> GetOrderStatus(Guid sagaId)
    {
        var status = await _sagaManager.GetSagaStatusAsync<OrderProcessingSaga>(sagaId);
        return Ok(new { sagaId, status });
    }
}

🔧 Extension Methods

The framework provides rich extension methods for common operations across all layers:

Web Extensions (Marventa.Framework.Web.Extensions)

// Configure all Marventa services
builder.Services.AddMarventaFramework(configuration, options => { ... });

// Add specific feature sets
builder.Services.AddMarventaSecurity(configuration);
builder.Services.AddMarventaStorage(configuration);
builder.Services.AddMarventaCDN(configuration);
builder.Services.AddMarventaCaching(configuration);

// Configure middleware pipeline
app.UseMarventaFramework(configuration);

Infrastructure Extensions (Marventa.Framework.Infrastructure.Extensions)

// Database & Data Access with BaseDbContext
services.AddDbContext<ApplicationDbContext>((serviceProvider, options) =>
{
    options.UseSqlServer(configuration.GetConnectionString("DefaultConnection"));
    // BaseDbContext automatically provides:
    // - Audit tracking (CreatedDate, UpdatedDate)
    // - Soft delete with global filters
    // - Multi-tenancy with automatic tenant isolation
    // - Domain event dispatching
});

// Register repositories using the organized interface structure
services.AddScoped<IRepository<Product>, BaseRepository<Product>>();
services.AddScoped<IRepository<Order>, BaseRepository<Order>>();

// Or register all repositories at once
services.AddRepositories();  // Registers all BaseRepository implementations

// Unit of Work pattern for transaction management
services.AddScoped<IUnitOfWork, UnitOfWork>();

// MongoDB for CQRS Projections (organized under Interfaces/Projections/)
services.AddSingleton<IMongoClient>(sp =>
{
    var mongoUrl = configuration.GetConnectionString("MongoDB");
    return new MongoClient(mongoUrl);
});
services.AddScoped(sp =>
{
    var client = sp.GetRequiredService<IMongoClient>();
    return client.GetDatabase("ProjectionsDB");
});
services.AddScoped(typeof(IProjectionRepository<>), typeof(MongoProjectionRepository<>));

// Messaging & Events (organized under Interfaces/Messaging/)
services.AddScoped<IMessageBus, RabbitMqMessageBus>();
services.AddScoped<IEventBus, DomainEventBus>();
services.AddRabbitMq(configuration);
services.AddKafka(configuration);

// Outbox/Inbox Pattern (organized under Interfaces/Messaging/Outbox/)
services.AddScoped<IOutboxService, OutboxService>();
services.AddScoped<IInboxService, InboxService>();
services.AddScoped<ITransactionalMessageService, TransactionalMessageService>();

// Sagas & Orchestration (organized under Interfaces/Sagas/)
services.AddScoped<ISagaManager, SagaManager>();
services.AddScoped(typeof(ISagaRepository<>), typeof(SimpleSagaRepository<>));
services.AddScoped<ISagaOrchestrator<OrderProcessingSaga>, OrderProcessingOrchestrator>();

// Multi-Tenancy (organized under Interfaces/MultiTenancy/)
services.AddScoped<ITenantContext, TenantContext>();
services.AddScoped<ITenantResolver, TenantResolver>();
services.AddScoped<ITenantStore, TenantStore>();
services.AddScoped<ITenantAuthorization, TenantAuthorizationService>();
services.AddScoped<ITenantPermissionService, TenantPermissionService>();

// Caching (organized under Interfaces/Caching/)
services.AddScoped<ICacheService, RedisCacheService>();
services.AddScoped<ITenantScopedCache, TenantScopedCacheService>();
services.AddMemoryCache();
services.AddStackExchangeRedisCache(options =>
{
    options.Configuration = configuration.GetConnectionString("Redis");
});

// Storage & CDN (organized under Interfaces/Storage/)
services.AddScoped<IStorageService, LocalStorageService>();
services.AddScoped<IMarventaStorage, MarventaStorageService>();
services.AddScoped<IMarventaCDN, AzureCDNService>(); // or AwsCDNService, CloudFlareCDNService
services.AddScoped<IMarventaFileProcessor, MarventaFileProcessor>();
services.AddScoped<IMarventaFileMetadata, MarventaFileMetadataService>();

// Search (organized under Interfaces/Services/)
services.AddScoped<ISearchService, ElasticsearchService>();

// Communication Services (organized under Interfaces/Services/)
services.AddScoped<IEmailService, EmailService>();
services.AddScoped<ISmsService, SmsService>();
services.AddScoped<ILoggerService, LoggerService>();

// Security (organized under Interfaces/Security/)
services.AddScoped<IJwtKeyRotationService, JwtKeyRotationService>();
services.AddScoped<IJwtKeyStore, JwtKeyStore>();
services.AddScoped<ITokenService, TokenService>();
services.AddScoped<IEncryptionService, EncryptionService>();
services.AddScoped<ICurrentUserService, CurrentUserService>();

// Distributed Systems (organized under Interfaces/DistributedSystems/)
services.AddScoped<IDistributedLock, RedisDistributedLock>();
services.AddScoped<ICorrelationContext, CorrelationContext>();
services.AddScoped<IActivityService, ActivityService>();

// Health Checks (organized under Interfaces/HealthCheck/)
services.AddHealthChecks()
    .AddCheck<DatabaseHealthCheck>("database")
    .AddCheck<RedisHealthCheck>("redis")
    .AddCheck<StorageHealthCheck>("storage");

// Idempotency (organized under Interfaces/Idempotency/)
services.AddScoped<IIdempotencyService, IdempotencyService>();

// Background Jobs (organized under Interfaces/BackgroundJobs/)
services.AddScoped<IBackgroundJobService, HangfireBackgroundJobService>();
services.AddHangfire(configuration);

// Configuration & Feature Flags (organized under Interfaces/Configuration/)
services.AddScoped<IConfigurationService, ConfigurationService>();
services.AddScoped<IFeatureFlagService, FeatureFlagService>();

// Analytics (organized under Interfaces/Analytics/)
services.AddScoped<IAnalyticsService, AnalyticsService>();

// Machine Learning (organized under Interfaces/MachineLearning/)
services.AddScoped<IMarventaML, MarventaMLService>();

// HTTP Client (organized under Interfaces/Http/)
services.AddHttpClient<IHttpClientService, HttpClientService>();

Application Extensions (Marventa.Framework.Application.Extensions)

// CQRS & MediatR
services.AddCqrs(typeof(Program).Assembly);
services.AddFluentValidation(typeof(Program).Assembly);

// AutoMapper
services.AddAutoMapperProfiles(typeof(Program).Assembly);

🎯 CQRS Pattern with MediatR

The framework provides built-in support for CQRS (Command Query Responsibility Segregation) with MediatR pipeline behaviors.

Setting up MediatR with Behaviors

Option 1: Using Marventa Framework Configuration (Integrated)

// In Program.cs
builder.Services.AddMarventaFramework(builder.Configuration, options =>
{
    // Enable CQRS with MediatR
    options.EnableCQRS = true;

    // Configure CQRS assemblies and behaviors
    options.CqrsOptions.Assemblies.Add(typeof(Program).Assembly);
    options.CqrsOptions.EnableValidationBehavior = true;   // Default: true
    options.CqrsOptions.EnableLoggingBehavior = true;      // Default: true
    options.CqrsOptions.EnableTransactionBehavior = true;  // Default: true

    // Other framework features...
    options.EnableLogging = true;
    options.EnableCaching = true;
});

// That's it! CQRS is fully configured with all behaviors

Option 2: Manual Configuration

using Marventa.Framework.Application.Behaviors;
using MediatR;

// In Program.cs
builder.Services.AddMediatR(cfg =>
{
    cfg.RegisterServicesFromAssembly(typeof(Program).Assembly);

    // Add pipeline behaviors (executed in order)
    cfg.AddOpenBehavior(typeof(ValidationBehavior<,>));      // 1. Validate requests
    cfg.AddOpenBehavior(typeof(LoggingBehavior<,>));         // 2. Log performance
    cfg.AddOpenBehavior(typeof(TransactionBehavior<,>));     // 3. Manage transactions
});

// Add FluentValidation
builder.Services.AddValidatorsFromAssembly(typeof(Program).Assembly);

// Add Unit of Work
builder.Services.AddScoped<IUnitOfWork, UnitOfWork>();

Option 3: Repository Pattern without CQRS

If you only want repositories without MediatR/CQRS:

using Marventa.Framework.Core.Interfaces.Data;
using Marventa.Framework.Infrastructure.Data;

// Manually add Unit of Work
builder.Services.AddScoped<IUnitOfWork, UnitOfWork>();
builder.Services.AddScoped(typeof(IRepository<>), typeof(BaseRepository<>));

ICommand & IQuery Interfaces

The framework provides base interfaces for CQRS implementation:

using Marventa.Framework.Application.Commands;
using Marventa.Framework.Application.Queries;

// ICommand - No return value
public interface ICommand : IValidatable { }

// ICommand<TResponse> - Returns a value
public interface ICommand<out TResponse> : ICommand { }

// IQuery<TResponse> - Read-only queries
public interface IQuery<out TResponse> : IValidatable { }

Note: These interfaces extend IValidatable, meaning all commands and queries can be validated using FluentValidation.

Creating Commands

Commands represent write operations that modify state:

using Marventa.Framework.Application.Commands;
using Marventa.Framework.Application.DTOs;

// Command
public class CreateProductCommand : ICommand<Guid>
{
    public string Name { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public decimal Price { get; set; }
    public string Category { get; set; } = string.Empty;
}

// Validator (automatically executed by ValidationBehavior)
public class CreateProductCommandValidator : AbstractValidator<CreateProductCommand>
{
    public CreateProductCommandValidator()
    {
        RuleFor(x => x.Name).NotEmpty().MaximumLength(200);
        RuleFor(x => x.Price).GreaterThan(0);
        RuleFor(x => x.Category).NotEmpty();
    }
}

// Handler
public class CreateProductCommandHandler : IRequestHandler<CreateProductCommand, Guid>
{
    private readonly IUnitOfWork _unitOfWork;
    private readonly ILogger<CreateProductCommandHandler> _logger;

    public CreateProductCommandHandler(
        IUnitOfWork unitOfWork,
        ILogger<CreateProductCommandHandler> logger)
    {
        _unitOfWork = unitOfWork;
        _logger = logger;
    }

    public async Task<Guid> Handle(CreateProductCommand request, CancellationToken cancellationToken)
    {
        var product = new Product
        {
            Name = request.Name,
            Description = request.Description,
            Price = request.Price,
            Category = request.Category
        };

        await _unitOfWork.Repository<Product>().AddAsync(product, cancellationToken);
        // TransactionBehavior automatically calls SaveChangesAsync

        _logger.LogInformation("Product created: {ProductId}", product.Id);
        return product.Id;
    }
}

Creating Queries

Queries represent read operations that don't modify state:

using Marventa.Framework.Application.Queries;
using Marventa.Framework.Application.DTOs;

// Query
public class GetProductByIdQuery : IQuery<ProductDto>
{
    public Guid Id { get; set; }
}

// Handler
public class GetProductByIdQueryHandler : IRequestHandler<GetProductByIdQuery, ProductDto>
{
    private readonly IRepository<Product> _repository;
    private readonly IMapper _mapper;

    public GetProductByIdQueryHandler(
        IRepository<Product> repository,
        IMapper mapper)
    {
        _repository = repository;
        _mapper = mapper;
    }

    public async Task<ProductDto> Handle(GetProductByIdQuery request, CancellationToken cancellationToken)
    {
        var product = await _repository.GetByIdAsync(request.Id, cancellationToken);
        return _mapper.Map<ProductDto>(product);
    }
}

Using in Controllers

using MediatR;
using Microsoft.AspNetCore.Mvc;

[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    private readonly IMediator _mediator;

    public ProductsController(IMediator mediator)
    {
        _mediator = mediator;
    }

    [HttpPost]
    public async Task<ActionResult<ApiResponse<Guid>>> Create(
        [FromBody] CreateProductCommand command,
        CancellationToken cancellationToken)
    {
        // ValidationBehavior validates automatically
        // LoggingBehavior logs performance automatically
        // TransactionBehavior manages transaction automatically
        var productId = await _mediator.Send(command, cancellationToken);

        return CreatedAtAction(
            nameof(GetById),
            new { id = productId },
            ApiResponse<Guid>.SuccessResult(productId, "Product created successfully"));
    }

    [HttpGet("{id}")]
    public async Task<ActionResult<ApiResponse<ProductDto>>> GetById(
        Guid id,
        CancellationToken cancellationToken)
    {
        var query = new GetProductByIdQuery { Id = id };
        var product = await _mediator.Send(query, cancellationToken);

        if (product == null)
            return NotFound(ApiResponse<ProductDto>.FailureResult("Product not found"));

        return Ok(ApiResponse<ProductDto>.SuccessResult(product));
    }
}

MediatR Pipeline Behaviors

The framework includes three essential behaviors:

1. ValidationBehavior - Automatic request validation

// Automatically validates all commands/queries using FluentValidation
// Throws ValidationException with detailed error messages
// No need to manually validate in handlers

2. LoggingBehavior - Performance monitoring

// Logs every request with execution time
// Warns about slow operations (>500ms)
// Logs errors with stack traces
// Output example:
// [INFO] Handling CreateProductCommand
// [INFO] Handled CreateProductCommand in 45ms
// [WARN] Long running request: GetAllProductsQuery took 750ms

3. TransactionBehavior - Automatic transaction management

// Automatically wraps commands in transactions
// Calls SaveChangesAsync after successful execution
// Rolls back on exceptions
// Queries are not wrapped in transactions (read-only)
// No need to manually call SaveChangesAsync in command handlers

Result Pattern

Use ApiResponse<T> for consistent API responses:

// Success response
return ApiResponse<ProductDto>.SuccessResult(product, "Product retrieved successfully");

// Failure response
return ApiResponse<ProductDto>.FailureResult("Product not found", "PRODUCT_NOT_FOUND");

// Validation error response
return ApiResponse<ProductDto>.ValidationErrorResult(errors);

// Paged results
var pagedProducts = new PagedResult<ProductDto>(
    items: products,
    totalCount: 150,
    pageNumber: 1,
    pageSize: 20
);

Core Extensions (Marventa.Framework.Core.Extensions)

// Extension methods for common operations
var trimmed = myString.TrimOrDefault();
var parsed = myString.ToGuidOrDefault();
var validated = myEntity.IsValid();

💾 Repository Pattern with Clean Architecture

Access data with strongly-typed repositories:

// Use repository in your services
public class ProductService
{
    private readonly IRepository<Product> _productRepository;
    private readonly IMarventaCaching _cache;

    public ProductService(IRepository<Product> productRepository, IMarventaCaching cache)
    {
        _productRepository = productRepository;
        _cache = cache;
    }

    public async Task<Product?> GetByIdAsync(Guid id)
    {
        var cacheKey = $"product_{id}";

        var cached = await _cache.GetAsync<Product>(cacheKey);
        if (cached != null) return cached;

        var product = await _productRepository.GetByIdAsync(id);
        if (product != null)
        {
            await _cache.SetAsync(cacheKey, product, TimeSpan.FromMinutes(30));
        }

        return product;
    }

    public async Task<IEnumerable<Product>> GetByCategoryAsync(string category)
    {
        return await _productRepository.FindAsync(p => p.Category == category);
    }

    public async Task<Product> CreateAsync(Product product)
    {
        var created = await _productRepository.AddAsync(product);
        await _productRepository.SaveChangesAsync();

        // Invalidate category cache
        await _cache.RemoveByPatternAsync($"products_category_{product.Category}*");

        return created;
    }
}

// Use in controllers
[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    private readonly ProductService _productService;

    public ProductsController(ProductService productService)
    {
        _productService = productService;
    }

    [HttpGet("{id}")]
    public async Task<IActionResult> GetProduct(Guid id)
    {
        var product = await _productService.GetByIdAsync(id);
        if (product == null)
            return NotFound();

        return Ok(product);
    }

    [HttpGet]
    public async Task<IActionResult> GetByCategory([FromQuery] string category)
    {
        var products = await _productService.GetByCategoryAsync(category);
        return Ok(products);
    }

    [HttpPost]
    public async Task<IActionResult> CreateProduct(Product product)
    {
        var created = await _productService.CreateAsync(product);
        return CreatedAtAction(nameof(GetProduct), new { id = created.Id }, created);
    }
}

---

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details.

Development Setup

# Clone the repository
git clone https://github.com/your-org/marventa-framework.git

# Navigate to the project
cd marventa-framework

# Restore packages
dotnet restore

# Build the solution
dotnet build

# Run tests
dotnet test

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📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

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🏆 Why Choose Marventa Framework?

Feature	Marventa Framework	Other Frameworks
Architecture	✅ Clean Architecture + SOLID	❌ Monolithic
Configuration	✅ Fully configurable	⚠️ Limited options
Performance	✅ Optimized pipeline	⚠️ Multiple middleware passes
Security	✅ Enterprise-grade	⚠️ Basic
Documentation	✅ Comprehensive	❌ Minimal
Testing	✅ 90%+ coverage	⚠️ Limited
Support	✅ Professional	❌ Community only

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Built with ❤️ by the Marventa Team

Website • Documentation • Support

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