Marventa.Framework 2.7.0

🚀 Marventa Framework

Complete enterprise-grade .NET framework with 47 modular features including file management, security, multi-tenancy, messaging, analytics, e-commerce, and more

📋 Table of Contents

1. Quick Start
2. Available Features
3. Core Philosophy
4. Architecture
5. Detailed Features
   • 5.1 Core Infrastructure
   • 5.2 Security & Authentication
   • 5.3 Communication Services
   • 5.4 Data & Storage
   • 5.5 API Management
   • 5.6 Performance & Scalability
   • 5.7 Monitoring & Analytics
   • 5.8 Background Processing
   • 5.9 Enterprise Architecture
   • 5.10 Search & AI
   • 5.11 Business Features
6. Configuration
7. Best Practices
8. Testing
9. Available Packages
10. Why Choose Marventa Framework?
11. License

---

1️⃣ Quick Start

Installation

dotnet add package Marventa.Framework

Basic Setup

// Program.cs
using Marventa.Framework.Web.Extensions;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddMarventaFramework(options =>
{
    options.EnableStorage = true;        // File operations
    options.EnableFileProcessor = true;  // Image processing
    options.EnableCDN = false;          // Optional
    options.EnableML = false;           // Optional
    options.EnableMetadata = true;      // Optional
});

var app = builder.Build();
app.UseMarventaFramework();
app.Run();

Simple File Upload

[ApiController]
[Route("api/[controller]")]
public class FilesController : ControllerBase
{
    private readonly IMarventaStorage _storage;
    private readonly IMarventaFileProcessor _processor;
    private readonly ILogger<FilesController> _logger;

    // Constructor Injection - services automatically injected by DI container
    public FilesController(
        IMarventaStorage storage,
        IMarventaFileProcessor processor,
        ILogger<FilesController> logger)
    {
        _storage = storage;
        _processor = processor;
        _logger = logger;
    }

    [HttpPost("upload")]
    public async Task<IActionResult> UploadImage(IFormFile file)
    {
        _logger.LogInformation("Uploading file: {FileName}, Size: {Size} bytes",
            file.FileName, file.Length);

        try
        {
            // Process image
            var processResult = await _processor.ProcessImageAsync(file.OpenReadStream(), new()
            {
                Width = 800, Height = 600, Quality = 85
            });

            // Upload to storage
            var uploadResult = await _storage.UploadFileAsync(
                processResult.ProcessedImage, file.FileName, file.ContentType);

            _logger.LogInformation("File uploaded successfully: {FileId}", uploadResult.FileId);

            return Ok(new {
                FileId = uploadResult.FileId,
                Url = uploadResult.PublicUrl,
                ProcessedSize = processResult.ProcessedSizeBytes
            });
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to upload file: {FileName}", file.FileName);
            return StatusCode(500, "File upload failed");
        }
    }
}

---

2️⃣ Available Features

47 modular features - enable only what you need!

2.1 🔧 Core Infrastructure (6 features)

options.EnableLogging = true;         // 1. Structured logging (Serilog, NLog)
options.EnableCaching = true;         // 2. Memory & distributed caching (Redis, In-Memory)
options.EnableRepository = true;      // 3. Generic repository & Unit of Work
options.EnableHealthChecks = true;    // 4. System health monitoring
options.EnableValidation = true;      // 5. Input validation (FluentValidation)
options.EnableExceptionHandling = true; // 6. Global error handling

2.2 🔐 Security & Authentication (4 features)

options.EnableSecurity = true;        // 7. Core security framework
options.EnableJWT = true;             // 8. JWT token authentication
options.EnableApiKeys = true;         // 9. API key management
options.EnableEncryption = true;      // 10. Data encryption (AES, RSA)

2.3 📧 Communication Services (3 features)

options.EnableEmail = true;           // 11. Email service (SMTP, SendGrid)
options.EnableSMS = true;             // 12. SMS notifications (Twilio)
options.EnableHttpClient = true;      // 13. HTTP client with retry policies

2.4 🗄️ Data & Storage (5 features)

options.EnableStorage = true;         // 14. Multi-provider storage (Azure, AWS, Local)
options.EnableFileProcessor = true;   // 15. Image processing & optimization
options.EnableMetadata = true;        // 16. File metadata management
options.EnableDatabaseSeeding = true; // 17. Database initialization & seeding
options.EnableSeeding = true;         // 18. Advanced data seeding

2.5 🌐 API Management (4 features)

options.EnableVersioning = true;      // 19. API versioning
options.EnableRateLimiting = true;    // 20. Request throttling
options.EnableCompression = true;     // 21. Response compression (Gzip, Brotli)
options.EnableIdempotency = true;     // 22. Idempotent API operations

2.6 ⚡ Performance & Scalability (5 features)

options.EnableDistributedLocking = true; // 23. Distributed locks (Redis)
options.EnableCircuitBreaker = true;  // 24. Circuit breaker pattern
options.EnableBatchOperations = true; // 25. Batch processing
options.EnableAdvancedCaching = true; // 26. Cache strategies (Write-through, Write-behind)
options.EnableCDN = true;             // 27. CDN integration (CloudFlare, Azure CDN)

2.7 📊 Monitoring & Analytics (4 features)

options.EnableAnalytics = true;       // 28. Event & metric tracking
options.EnableObservability = true;   // 29. Distributed tracing (OpenTelemetry)
options.EnableTracking = true;        // 30. User activity tracking
options.EnableFeatureFlags = true;    // 31. Feature toggles & A/B testing

2.8 ⏱️ Background Processing (3 features)

options.EnableBackgroundJobs = true;  // 32. Job scheduling (Hangfire, Quartz)
options.EnableMessaging = true;       // 33. Message bus (RabbitMQ, Azure Service Bus)
options.EnableDeadLetterQueue = true; // 34. Failed message handling

2.9 🏢 Enterprise Architecture (5 features)

options.EnableMultiTenancy = true;    // 35. Multi-tenant architecture
options.EnableEventDriven = true;     // 36. Event sourcing & domain events
options.EnableCQRS = true;            // 37. Command Query separation
options.EnableSagas = true;           // 38. Saga orchestration
options.EnableProjections = true;     // 39. Event projections

2.10 🔍 Search & AI (3 features)

options.EnableSearch = true;          // 40. Elasticsearch integration
options.EnableML = true;              // 41. AI/ML content analysis
options.EnableRealTimeProjections = true; // 42. Real-time data projections

2.11 🛒 Business Features (5 features)

options.EnableECommerce = true;       // 43. E-commerce framework
options.EnablePayments = true;        // 44. Payment processing (Stripe, PayPal)
options.EnableShipping = true;        // 45. Shipping & logistics
options.EnableFraudDetection = true;  // 46. Fraud prevention
options.EnableInternationalization = true; // 47. Multi-language support

📊 Feature Count Summary

• Total Features: 47
• Core Infrastructure: 6 features (1-6)
• Security & Authentication: 4 features (7-10)
• Communication Services: 3 features (11-13)
• Data & Storage: 5 features (14-18)
• API Management: 4 features (19-22)
• Performance & Scalability: 5 features (23-27)
• Monitoring & Analytics: 4 features (28-31)
• Background Processing: 3 features (32-34)
• Enterprise Architecture: 5 features (35-39)
• Search & AI: 3 features (40-42)
• Business Features: 5 features (43-47)

💡 Smart Defaults

• All features are FALSE by default
• Minimal setup: Just enable 3-4 core features
• Production setup: Enable 8-10 essential features
• Enterprise setup: Enable all 47 features you need

---

3️⃣ Core Philosophy

• 🔧 Modular Design: Enable only what you need - pay for what you use
• 🔄 Provider Agnostic: Switch providers without code changes
• ⚡ Performance First: Async operations and optimized processing
• 🏢 Enterprise Ready: Production-tested with comprehensive error handling
• 👨‍💻 Developer Friendly: Clean APIs with extensive documentation

---

4️⃣ Architecture

Clean, modular architecture with 47 enterprise features in 29+ focused, single-responsibility files:

Marventa.Framework/
├── 📦 Core/                    # Domain models and interfaces
│   ├── 🔌 Interfaces/         # 40+ service contracts
│   ├── 📄 Models/            # 29+ focused model files
│   │   ├── CDN/              # 8 CDN-specific files
│   │   ├── Storage/          # 12 Storage-specific files
│   │   ├── ML/               # 6 ML-specific files
│   │   ├── FileProcessing/   # Processing models
│   │   └── FileMetadata/     # 3 Metadata files
│   ├── 🔐 Security/          # JWT, Encryption, API Keys
│   ├── 🏢 Multi-Tenant/      # Tenant management
│   ├── 🔄 Events/            # Domain & Integration events
│   └── 🚫 Exceptions/        # Custom exceptions
├── 🎯 Domain/                  # Business logic
│   └── 🛒 ECommerce/         # Payment, Shipping, Fraud
├── 🔧 Application/            # CQRS, Commands, Queries
│   ├── ⚡ Commands/          # Command handlers
│   ├── 🔍 Queries/           # Query handlers
│   ├── 🔄 Behaviors/         # MediatR behaviors
│   └── ✅ Validators/        # Validation logic
├── 🏗️ Infrastructure/         # Service implementations
│   ├── 📧 Messaging/         # Email, SMS, Message Bus
│   ├── 🔍 Search/            # Elasticsearch
│   ├── 📊 Analytics/         # Event tracking
│   ├── ⚡ RateLimiting/       # Tenant rate limits
│   └── 🔍 Observability/     # Distributed tracing
└── 🌐 Web/                   # ASP.NET integration
    ├── 🔐 Security/          # Middleware
    ├── 📋 Middleware/        # Exception, Correlation
    ├── 📊 Versioning/        # API versioning
    └── ⚙️ Extensions/        # DI configuration

SOLID Compliance: Each file follows Single Responsibility Principle

---

5️⃣ Detailed Features

5.1 🔧 Core Infrastructure

Logging

Structured logging with multiple providers

// 1. Service Registration
services.AddMarventaFramework(options =>
{
    options.EnableLogging = true;
    options.LoggingOptions.Provider = LoggingProvider.Serilog;
    options.LoggingOptions.MinimumLevel = LogLevel.Information;
});

// 2. Constructor Injection in Controllers/Services
public class OrderController : ControllerBase
{
    private readonly ILogger<OrderController> _logger;
    private readonly IOrderService _orderService;

    public OrderController(ILogger<OrderController> logger, IOrderService orderService)
    {
        _logger = logger;
        _orderService = orderService;
    }

    [HttpPost]
    public async Task<IActionResult> CreateOrder([FromBody] CreateOrderDto dto)
    {
        _logger.LogInformation("Creating order for customer {CustomerId}", dto.CustomerId);

        try
        {
            var order = await _orderService.CreateOrderAsync(dto);
            _logger.LogInformation("Order {OrderId} created successfully", order.Id);
            return Ok(order);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to create order for customer {CustomerId}", dto.CustomerId);
            throw;
        }
    }
}

// 3. Service Layer with DI
public class OrderService : IOrderService
{
    private readonly ILogger<OrderService> _logger;
    private readonly IRepository<Order> _orderRepository;
    private readonly IUnitOfWork _unitOfWork;

    public OrderService(
        ILogger<OrderService> logger,
        IRepository<Order> orderRepository,
        IUnitOfWork unitOfWork)
    {
        _logger = logger;
        _orderRepository = orderRepository;
        _unitOfWork = unitOfWork;
    }

    public async Task<Order> CreateOrderAsync(CreateOrderDto dto)
    {
        // Structured logging with context
        using (_logger.BeginScope(new { CustomerId = dto.CustomerId, OrderType = dto.OrderType }))
        {
            _logger.LogInformation("Order processing started");

            // Performance logging
            using (_logger.BeginTimedOperation("DatabaseSave"))
            {
                var order = new Order(dto.CustomerId, dto.Items);
                await _orderRepository.AddAsync(order);
                await _unitOfWork.CommitAsync();
            }

            _logger.LogInformation("Order processed successfully");
            return order;
        }
    }
}

Caching

High-performance caching with multiple backends

// 1. Service Registration
services.AddMarventaFramework(options =>
{
    options.EnableCaching = true;
    // Memory cache (default)
    options.CachingOptions.Provider = CacheProvider.Memory;

    // OR Redis distributed cache
    options.CachingOptions.Provider = CacheProvider.Redis;
    options.CachingOptions.ConnectionString = "localhost:6379";
});

// 2. Constructor Injection
public class ProductService : IProductService
{
    private readonly ICacheService _cache;
    private readonly IRepository<Product> _productRepository;
    private readonly ILogger<ProductService> _logger;

    public ProductService(
        ICacheService cache,
        IRepository<Product> productRepository,
        ILogger<ProductService> logger)
    {
        _cache = cache;
        _productRepository = productRepository;
        _logger = logger;
    }

    public async Task<Product> GetProductAsync(int productId)
    {
        // Simple caching with method
        var product = await _cache.GetOrSetAsync($"product:{productId}",
            async () => {
                _logger.LogInformation("Loading product {ProductId} from database", productId);
                return await _productRepository.GetByIdAsync(productId);
            },
            TimeSpan.FromMinutes(30));

        return product;
    }

    public async Task<List<Product>> GetCategoryProductsAsync(string category)
    {
        // Advanced caching with tags
        var products = await _cache.GetOrSetAsync($"products:category:{category}",
            async () => await _productRepository.GetAsync(p => p.Category == category),
            new CacheOptions
            {
                SlidingExpiration = TimeSpan.FromMinutes(15),
                Tags = new[] { "products", $"category:{category}" }
            });

        return products;
    }

    public async Task UpdateProductAsync(Product product)
    {
        await _productRepository.UpdateAsync(product);

        // Cache invalidation after update
        await _cache.RemoveAsync($"product:{product.Id}");
        await _cache.RemoveByTagAsync($"category:{product.Category}");

        _logger.LogInformation("Product {ProductId} updated and cache invalidated", product.Id);
    }
}

// 3. Controller Usage
public class ProductsController : ControllerBase
{
    private readonly IProductService _productService;

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

    [HttpGet("{id}")]
    public async Task<IActionResult> GetProduct(int id)
    {
        var product = await _productService.GetProductAsync(id);
        return Ok(product);
    }
}

Repository Pattern

Generic repository with Unit of Work

// 1. Service Registration (Automatically handled by AddMarventaFramework)
services.AddMarventaFramework(options =>
{
    options.EnableRepository = true;
    // Repository and UnitOfWork are automatically registered as scoped services
});

// 2. Constructor Injection in Services
public class UserService : IUserService
{
    private readonly IRepository<User> _userRepository;
    private readonly IRepository<Order> _orderRepository;
    private readonly IUnitOfWork _unitOfWork;
    private readonly ILogger<UserService> _logger;

    public UserService(
        IRepository<User> userRepository,
        IRepository<Order> orderRepository,
        IUnitOfWork unitOfWork,
        ILogger<UserService> logger)
    {
        _userRepository = userRepository;
        _orderRepository = orderRepository;
        _unitOfWork = unitOfWork;
        _logger = logger;
    }

    public async Task<List<User>> GetActiveUsersAsync()
    {
        // Query with specifications
        var activeUsers = await _userRepository.GetAsync(u => u.IsActive);
        _logger.LogInformation("Retrieved {Count} active users", activeUsers.Count);
        return activeUsers;
    }

    public async Task<User> GetUserWithOrdersAsync(int userId)
    {
        // Complex queries with includes
        var user = await _userRepository.GetFirstOrDefaultAsync(
            filter: u => u.Id == userId,
            includes: "Orders.OrderItems.Product");

        return user;
    }

    public async Task<User> CreateUserWithInitialOrderAsync(User user, Order initialOrder)
    {
        // Unit of Work pattern for transactions
        using (var transaction = await _unitOfWork.BeginTransactionAsync())
        {
            try
            {
                // Add user
                await _userRepository.AddAsync(user);
                await _unitOfWork.SaveChangesAsync();

                // Set the user ID for the order
                initialOrder.UserId = user.Id;
                await _orderRepository.AddAsync(initialOrder);

                await _unitOfWork.SaveChangesAsync();
                await transaction.CommitAsync();

                _logger.LogInformation("User {UserId} created with initial order {OrderId}",
                    user.Id, initialOrder.Id);

                return user;
            }
            catch (Exception ex)
            {
                await transaction.RollbackAsync();
                _logger.LogError(ex, "Failed to create user with initial order");
                throw;
            }
        }
    }
}

// 3. Controller Usage
public class UsersController : ControllerBase
{
    private readonly IUserService _userService;

    public UsersController(IUserService userService)
    {
        _userService = userService;
    }

    [HttpGet("active")]
    public async Task<IActionResult> GetActiveUsers()
    {
        var users = await _userService.GetActiveUsersAsync();
        return Ok(users);
    }

    [HttpPost]
    public async Task<IActionResult> CreateUser([FromBody] CreateUserDto dto)
    {
        var user = new User(dto.Email, dto.FirstName, dto.LastName);
        var createdUser = await _userService.CreateUserWithInitialOrderAsync(user, dto.InitialOrder);
        return CreatedAtAction(nameof(GetUser), new { id = createdUser.Id }, createdUser);
    }
}

Health Checks

System health monitoring

// 1. Service Registration
services.AddMarventaFramework(options =>
{
    options.EnableHealthChecks = true;
});

// Add additional health checks
services.AddHealthChecks()
    .AddCheck<DatabaseHealthCheck>("database")
    .AddCheck<CacheHealthCheck>("cache")
    .AddCheck<StorageHealthCheck>("storage")
    .AddCheck<CustomHealthCheck>("custom");

// 2. Custom Health Check with DI
public class CustomHealthCheck : IHealthCheck
{
    private readonly IRepository<User> _userRepository;
    private readonly ICacheService _cache;
    private readonly ILogger<CustomHealthCheck> _logger;

    public CustomHealthCheck(
        IRepository<User> userRepository,
        ICacheService cache,
        ILogger<CustomHealthCheck> logger)
    {
        _userRepository = userRepository;
        _cache = cache;
        _logger = logger;
    }

    public async Task<HealthCheckResult> CheckHealthAsync(
        HealthCheckContext context,
        CancellationToken cancellationToken = default)
    {
        try
        {
            // Check database connectivity
            var userCount = await _userRepository.CountAsync();

            // Check cache connectivity
            await _cache.SetAsync("health-check", "OK", TimeSpan.FromSeconds(10));
            var cacheValue = await _cache.GetAsync<string>("health-check");

            var data = new Dictionary<string, object>
            {
                ["UserCount"] = userCount,
                ["CacheStatus"] = cacheValue == "OK" ? "Healthy" : "Unhealthy"
            };

            _logger.LogInformation("Health check passed - Users: {UserCount}, Cache: {CacheStatus}",
                userCount, cacheValue);

            return HealthCheckResult.Healthy("All systems operational", data);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Health check failed");
            return HealthCheckResult.Unhealthy("System check failed", ex);
        }
    }
}

// 3. Health Check Endpoint in Controller
public class HealthController : ControllerBase
{
    private readonly HealthCheckService _healthCheckService;

    public HealthController(HealthCheckService healthCheckService)
    {
        _healthCheckService = healthCheckService;
    }

    [HttpGet("health")]
    public async Task<IActionResult> GetHealth()
    {
        var report = await _healthCheckService.CheckHealthAsync();
        return Ok(new
        {
            Status = report.Status.ToString(),
            Duration = report.TotalDuration,
            Checks = report.Entries.Select(e => new
            {
                Name = e.Key,
                Status = e.Value.Status.ToString(),
                Description = e.Value.Description,
                Data = e.Value.Data
            })
        });
    }
}

Validation

Input validation with FluentValidation

// 1. Service Registration
services.AddMarventaFramework(options =>
{
    options.EnableValidation = true;
});

// Validators are automatically registered by convention

// 2. Validator Definition with DI
public class CreateOrderValidator : AbstractValidator<CreateOrderDto>
{
    private readonly IRepository<Customer> _customerRepository;
    private readonly IRepository<Product> _productRepository;

    public CreateOrderValidator(
        IRepository<Customer> customerRepository,
        IRepository<Product> productRepository)
    {
        _customerRepository = customerRepository;
        _productRepository = productRepository;

        RuleFor(x => x.CustomerId)
            .NotEmpty()
            .MustAsync(CustomerExists)
            .WithMessage("Customer does not exist");

        RuleFor(x => x.Items)
            .NotEmpty()
            .Must(x => x.Count > 0)
            .WithMessage("Order must contain at least one item");

        RuleFor(x => x.TotalAmount)
            .GreaterThan(0)
            .WithMessage("Total amount must be greater than zero");

        RuleForEach(x => x.Items)
            .SetValidator(new OrderItemValidator(_productRepository));

        RuleFor(x => x)
            .MustAsync(ValidateTotalAmount)
            .WithMessage("Total amount does not match item prices");
    }

    private async Task<bool> CustomerExists(int customerId, CancellationToken token)
    {
        return await _customerRepository.AnyAsync(c => c.Id == customerId);
    }

    private async Task<bool> ValidateTotalAmount(CreateOrderDto order, CancellationToken token)
    {
        var products = await _productRepository.GetAsync(p => order.Items.Select(i => i.ProductId).Contains(p.Id));
        var calculatedTotal = order.Items.Sum(item =>
        {
            var product = products.First(p => p.Id == item.ProductId);
            return product.Price * item.Quantity;
        });

        return Math.Abs(calculatedTotal - order.TotalAmount) < 0.01m;
    }
}

// 3. Nested Validator with DI
public class OrderItemValidator : AbstractValidator<OrderItemDto>
{
    private readonly IRepository<Product> _productRepository;

    public OrderItemValidator(IRepository<Product> productRepository)
    {
        _productRepository = productRepository;

        RuleFor(x => x.ProductId)
            .NotEmpty()
            .MustAsync(ProductExists)
            .WithMessage("Product does not exist");

        RuleFor(x => x.Quantity)
            .GreaterThan(0)
            .WithMessage("Quantity must be greater than zero");
    }

    private async Task<bool> ProductExists(int productId, CancellationToken token)
    {
        return await _productRepository.AnyAsync(p => p.Id == productId);
    }
}

// 4. Controller with Auto-Validation
public class OrdersController : ControllerBase
{
    private readonly IOrderService _orderService;
    private readonly ILogger<OrdersController> _logger;

    public OrdersController(IOrderService orderService, ILogger<OrdersController> logger)
    {
        _orderService = orderService;
        _logger = logger;
    }

    [HttpPost]
    public async Task<IActionResult> CreateOrder([FromBody] CreateOrderDto dto)
    {
        // Validation happens automatically before reaching here
        // If validation fails, BadRequest is returned automatically

        _logger.LogInformation("Creating order for customer {CustomerId}", dto.CustomerId);

        var order = await _orderService.CreateAsync(dto);
        return CreatedAtAction(nameof(GetOrder), new { id = order.Id }, order);
    }

    [HttpGet("{id}")]
    public async Task<IActionResult> GetOrder(int id)
    {
        var order = await _orderService.GetByIdAsync(id);
        return Ok(order);
    }
}

Global Exception Handling

Centralized error handling

// 1. Service Registration
services.AddMarventaFramework(options =>
{
    options.EnableExceptionHandling = true;
    options.ExceptionHandlingOptions.IncludeDetails = !env.IsProduction();
    options.ExceptionHandlingOptions.LogErrors = true;
});

// 2. Custom Exception Types
public class BusinessException : Exception
{
    public string ErrorCode { get; }

    public BusinessException(string errorCode, string message) : base(message)
    {
        ErrorCode = errorCode;
    }
}

public class NotFoundException : Exception
{
    public NotFoundException(string entityName, object id)
        : base($"{entityName} with ID {id} was not found")
    {
    }
}

// 3. Service with Exception Handling
public class OrderService : IOrderService
{
    private readonly IRepository<Order> _orderRepository;
    private readonly IRepository<Customer> _customerRepository;
    private readonly ILogger<OrderService> _logger;

    public OrderService(
        IRepository<Order> orderRepository,
        IRepository<Customer> customerRepository,
        ILogger<OrderService> logger)
    {
        _orderRepository = orderRepository;
        _customerRepository = customerRepository;
        _logger = logger;
    }

    public async Task<Order> GetByIdAsync(int orderId)
    {
        var order = await _orderRepository.GetByIdAsync(orderId);
        if (order == null)
        {
            _logger.LogWarning("Order {OrderId} not found", orderId);
            throw new NotFoundException("Order", orderId);
        }

        return order;
    }

    public async Task<Order> CreateOrderAsync(CreateOrderDto dto)
    {
        // Check customer exists
        var customer = await _customerRepository.GetByIdAsync(dto.CustomerId);
        if (customer == null)
        {
            throw new NotFoundException("Customer", dto.CustomerId);
        }

        // Business rule validation
        if (customer.CreditLimit < dto.TotalAmount)
        {
            _logger.LogWarning("Customer {CustomerId} credit limit exceeded. Limit: {CreditLimit}, Requested: {Amount}",
                dto.CustomerId, customer.CreditLimit, dto.TotalAmount);

            throw new BusinessException("CREDIT_LIMIT_EXCEEDED",
                $"Order amount ${dto.TotalAmount} exceeds customer credit limit of ${customer.CreditLimit}");
        }

        var order = new Order(dto.CustomerId, dto.Items, dto.TotalAmount);
        await _orderRepository.AddAsync(order);

        _logger.LogInformation("Order {OrderId} created successfully for customer {CustomerId}",
            order.Id, dto.CustomerId);

        return order;
    }
}

// 4. Controller Exception Handling (Automatic via Middleware)
public class OrdersController : ControllerBase
{
    private readonly IOrderService _orderService;

    public OrdersController(IOrderService orderService)
    {
        _orderService = orderService;
    }

    [HttpGet("{id}")]
    public async Task<IActionResult> GetOrder(int id)
    {
        // No try-catch needed - global exception middleware handles all exceptions
        var order = await _orderService.GetByIdAsync(id);
        return Ok(order);
    }

    [HttpPost]
    public async Task<IActionResult> CreateOrder([FromBody] CreateOrderDto dto)
    {
        // Exceptions are automatically caught and converted to proper HTTP responses
        var order = await _orderService.CreateOrderAsync(dto);
        return CreatedAtAction(nameof(GetOrder), new { id = order.Id }, order);
    }
}

// 5. Automatic Error Response Examples:

// NotFoundException -> 404 Not Found
{
    "error": {
        "code": "NOT_FOUND",
        "message": "Order with ID 123 was not found",
        "timestamp": "2024-01-15T10:30:00Z",
        "traceId": "abc123"
    }
}

// BusinessException -> 400 Bad Request
{
    "error": {
        "code": "CREDIT_LIMIT_EXCEEDED",
        "message": "Order amount $1500 exceeds customer credit limit of $1000",
        "timestamp": "2024-01-15T10:30:00Z",
        "traceId": "def456"
    }
}

// ValidationException -> 400 Bad Request
{
    "error": {
        "code": "VALIDATION_FAILED",
        "message": "One or more validation errors occurred",
        "details": [
            "Customer ID is required",
            "Total amount must be greater than zero"
        ],
        "timestamp": "2024-01-15T10:30:00Z",
        "traceId": "ghi789"
    }
}

5.2 🔐 Security & Authentication

Multi-provider storage with unified API

// Azure Blob Storage
services.AddMarventaFramework(options =>
{
    options.StorageOptions.Provider = StorageProvider.AzureBlob;
    options.StorageOptions.ConnectionString = "DefaultEndpointsProtocol=https;...";
});

// AWS S3
options.StorageOptions.Provider = StorageProvider.AWS;
options.StorageOptions.AccessKey = "your-access-key";
options.StorageOptions.SecretKey = "your-secret-key";

// Local File System
options.StorageOptions.Provider = StorageProvider.LocalFile;
options.StorageOptions.BasePath = "uploads";

Usage Examples:

// Upload file
var result = await _storage.UploadFileAsync(stream, "document.pdf", "application/pdf");

// Download file
var download = await _storage.DownloadFileAsync(result.FileId);

// File operations
await _storage.CopyFileAsync(fileId, "backup/document.pdf");
await _storage.DeleteFileAsync(fileId);

// Bulk operations
var files = new Dictionary<string, Stream> { ["file1.jpg"] = stream1, ["file2.png"] = stream2 };
var bulkResult = await _storage.BulkUploadAsync(files);

5.3 📧 Communication Services

Comprehensive image manipulation and optimization

// Image processing configuration
options.FileProcessorOptions.Provider = FileProcessorProvider.ImageSharp;
options.FileProcessorOptions.DefaultImageQuality = 85;
options.FileProcessorOptions.MaxFileSizeBytes = 52428800; // 50MB

Usage Examples:

// Resize image
var resizeResult = await _processor.ProcessImageAsync(imageStream, new ProcessingOptions
{
    Width = 800,
    Height = 600,
    Quality = 90
});

// Generate thumbnails
var thumbnailResult = await _processor.GenerateThumbnailsAsync(imageStream, new[]
{
    new ThumbnailSize { Name = "small", Width = 150, Height = 150 },
    new ThumbnailSize { Name = "medium", Width = 300, Height = 300 },
    new ThumbnailSize { Name = "large", Width = 600, Height = 600 }
});

// Optimize image
var optimizeResult = await _processor.OptimizeImageAsync(imageStream, new OptimizationOptions
{
    Quality = 75,
    EnableProgressive = true,
    PreserveMetadata = false
});

// Apply watermark
var watermarkResult = await _processor.ApplyWatermarkAsync(imageStream, new WatermarkOptions
{
    Text = "© 2024 Company Name",
    Position = WatermarkPosition.BottomRight,
    Opacity = 0.7f
});

// Convert format
var convertResult = await _processor.ConvertFormatAsync(imageStream, "webp", new ConversionOptions
{
    Quality = 80,
    PreserveMetadata = true
});

5.4 🗄️ Data & Storage

Global content delivery with caching

// CDN configuration
options.CDNOptions.Provider = CDNProvider.CloudFlare;
options.CDNOptions.Endpoint = "https://cdn.example.com";
options.CDNOptions.ApiKey = "your-api-key";
options.CDNOptions.DefaultCacheTTL = 86400; // 24 hours

Usage Examples:

// Upload to CDN
var cdnResult = await _cdn.UploadToCDNAsync(fileId, fileStream, "image/jpeg", new CDNUploadOptions
{
    CacheTTL = TimeSpan.FromHours(24),
    EnableCompression = true
});

// Invalidate cache
await _cdn.InvalidateCacheAsync(new[] { "/images/photo.jpg", "/css/style.css" });

// Transform images on CDN
var transformResult = await _cdn.TransformImageAsync(fileId, new ImageTransformation
{
    Width = 400,
    Height = 300,
    Quality = 80,
    Format = "webp"
});

// Get CDN metrics
var metrics = await _cdn.GetCDNMetricsAsync(new TimeRange
{
    StartTime = DateTime.UtcNow.AddDays(-30),
    EndTime = DateTime.UtcNow
});

5.5 🌐 API Management

Intelligent content analysis and processing

// ML configuration
options.MLOptions.Provider = MLProvider.AzureAI;
options.MLOptions.ApiEndpoint = "https://cognitiveservices.azure.com";
options.MLOptions.ApiKey = "your-api-key";
options.MLOptions.MinConfidenceThreshold = 0.7;

Usage Examples:

// Image analysis
var analysisResult = await _ml.AnalyzeImageAsync(imageStream, new ImageAnalysisOptions
{
    DetectObjects = true,
    DetectFaces = true,
    GenerateTags = true,
    ExtractText = true
});

// Face detection
var faceResult = await _ml.DetectFacesAsync(imageStream, new FaceDetectionOptions
{
    DetectAge = true,
    DetectGender = true,
    DetectEmotions = true
});

// Text extraction (OCR)
var ocrResult = await _ml.ExtractTextAsync(imageStream, new TextExtractionOptions
{
    Language = "en",
    DetectOrientation = true
});

// Content optimization suggestions
var suggestions = await _ml.GetOptimizationSuggestionsAsync(fileId, new OptimizationRequest
{
    TargetAudience = "mobile",
    MaxFileSize = 1024000 // 1MB
});

5.6 ⚡ Performance & Scalability

Advanced file metadata and search capabilities

// Metadata configuration
options.MetadataOptions.Provider = MetadataProvider.MongoDB;
options.MetadataOptions.ConnectionString = "mongodb://localhost:27017";
options.MetadataOptions.DatabaseName = "FileMetadata";

Usage Examples:

// Add file metadata
var metadata = new FileMetadata
{
    FileId = fileId,
    Title = "Product Image",
    Description = "High-quality product photo",
    Tags = new[] { new FileTag { Name = "product", Source = TagSource.Manual } },
    CustomProperties = new Dictionary<string, object>
    {
        ["ProductId"] = "P12345",
        ["Category"] = "Electronics"
    }
};
await _metadata.AddFileMetadataAsync(metadata);

// Search files
var searchResult = await _metadata.SearchFilesAsync(new MetadataSearchOptions
{
    Query = "product electronics",
    FileTypes = new[] { "image/jpeg", "image/png" },
    DateRange = new TimeRange(DateTime.Now.AddDays(-30), DateTime.Now),
    Tags = new[] { "product" }
});

// File analytics
var analytics = await _metadata.GetFileAnalyticsAsync(fileId);
Console.WriteLine($"Views: {analytics.TotalViews}, Downloads: {analytics.TotalDownloads}");

// Tag management
await _metadata.AddTagsToFileAsync(fileId, new[] { "featured", "bestseller" });
var popularTags = await _metadata.GetPopularTagsAsync(new TagPopularityOptions
{
    TimeRange = new TimeRange(DateTime.Now.AddDays(-30), DateTime.Now),
    Limit = 10
});

5.7 📊 Monitoring & Analytics

Comprehensive security with JWT, API Keys, and encryption

// JWT Configuration
options.JwtOptions.SecretKey = "your-secret-key";
options.JwtOptions.Issuer = "your-app";
options.JwtOptions.Audience = "your-audience";
options.JwtOptions.ExpirationMinutes = 60;

Usage Examples:

// JWT Token Generation
var tokenResult = await _tokenService.GenerateTokenAsync(userId, new[] { "admin", "user" });
Console.WriteLine($"Access Token: {tokenResult.AccessToken}");
Console.WriteLine($"Refresh Token: {tokenResult.RefreshToken}");

// API Key Authentication (in controller)
[ApiKey]
public class SecureController : ControllerBase { }

// Encryption Service
var encrypted = await _encryptionService.EncryptAsync("sensitive-data");
var decrypted = await _encryptionService.DecryptAsync(encrypted);

// Password Hashing
var hash = await _encryptionService.GenerateHashAsync("password", salt);
var isValid = await _encryptionService.VerifyHashAsync("password", hash, salt);

5.8 ⏱️ Background Processing

Complete tenant isolation and management

// Multi-tenant configuration
options.MultiTenancyOptions.TenantResolutionStrategy = TenantResolutionStrategy.Header;
options.MultiTenancyOptions.DefaultTenantId = "default";
options.MultiTenancyOptions.EnableTenantScopedServices = true;

Usage Examples:

// Tenant Context
var currentTenant = _tenantContext.Current;
Console.WriteLine($"Current Tenant: {currentTenant.Id} - {currentTenant.Name}");

// Tenant-Scoped Caching
await _tenantScopedCache.SetAsync("key", data, TimeSpan.FromHours(1));
var cachedData = await _tenantScopedCache.GetAsync<MyData>("key");

// Tenant Rate Limiting
var isAllowed = await _tenantRateLimiter.TryAcquireAsync("api-endpoint", 100, TimeSpan.FromMinutes(1));
if (!isAllowed) return StatusCode(429, "Rate limit exceeded");

// Tenant Authorization
var hasAccess = await _tenantAuthorization.HasAccessAsync(tenantId, "feature-name");

5.9 🏢 Enterprise Architecture

Domain and Integration events with Event Bus

// Event Bus configuration
options.EventBusOptions.Provider = EventBusProvider.RabbitMQ;
options.EventBusOptions.ConnectionString = "amqp://localhost";

Usage Examples:

// Publishing Domain Events
var domainEvent = new UserRegisteredEvent(userId, email, DateTime.UtcNow);
await _eventBus.PublishAsync(domainEvent);

// Publishing Integration Events
var integrationEvent = new OrderCompletedEvent(orderId, customerId, totalAmount);
await _eventBus.PublishIntegrationEventAsync(integrationEvent);

// Event Handler
public class UserRegisteredEventHandler : IDomainEventHandler<UserRegisteredEvent>
{
    public async Task HandleAsync(UserRegisteredEvent domainEvent)
    {
        // Send welcome email
        await _emailService.SendWelcomeEmailAsync(domainEvent.Email);
    }
}

5.10 🔍 Search & AI

Command Query Responsibility Segregation with MediatR-style architecture

Usage Examples:

// Command Definition
public class CreateUserCommand : ICommand<CreateUserResult>
{
    public string Email { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

// Command Handler
public class CreateUserCommandHandler : ICommandHandler<CreateUserCommand, CreateUserResult>
{
    public async Task<CreateUserResult> HandleAsync(CreateUserCommand command)
    {
        // Create user logic
        var user = new User(command.Email, command.FirstName, command.LastName);
        await _userRepository.AddAsync(user);
        return new CreateUserResult { UserId = user.Id };
    }
}

// Query Definition
public class GetUserQuery : IQuery<UserDto>
{
    public int UserId { get; set; }
}

// Query Handler
public class GetUserQueryHandler : IQueryHandler<GetUserQuery, UserDto>
{
    public async Task<UserDto> HandleAsync(GetUserQuery query)
    {
        var user = await _userRepository.GetByIdAsync(query.UserId);
        return _mapper.Map<UserDto>(user);
    }
}

5.11 🛍 Business Features

Rate limiting, caching, and distributed locking

// Caching configuration
options.CacheOptions.Provider = CacheProvider.Redis;
options.CacheOptions.ConnectionString = "localhost:6379";
options.CacheOptions.DefaultExpiration = TimeSpan.FromMinutes(30);

Usage Examples:

// Distributed Caching
await _cacheService.SetAsync("user:123", userData, TimeSpan.FromHours(1));
var cachedUser = await _cacheService.GetAsync<UserData>("user:123");

// Distributed Locking
using var lockHandle = await _distributedLock.AcquireAsync("resource-key", TimeSpan.FromMinutes(5));
if (lockHandle.IsAcquired)
{
    // Critical section - only one process can execute this
    await ProcessCriticalOperation();
}

// Rate Limiting Attribute
[RateLimit(RequestsPerMinute = 60)]
public class ApiController : ControllerBase { }

6️⃣ Configuration

6.1 appsettings.json Configuration

{
  "Marventa": {
    "EnableStorage": true,
    "EnableFileProcessor": true,
    "EnableCDN": false,
    "EnableML": false,
    "EnableMetadata": true,

    "StorageOptions": {
      "Provider": "AzureBlob",
      "ConnectionString": "DefaultEndpointsProtocol=https;...",
      "DefaultContainer": "files",
      "EnableEncryption": true,
      "MaxFileSizeBytes": 104857600
    },

    "FileProcessorOptions": {
      "Provider": "ImageSharp",
      "DefaultImageQuality": 85,
      "MaxFileSizeBytes": 52428800,
      "SupportedFormats": ["jpg", "jpeg", "png", "webp", "gif"],
      "DefaultThumbnailSizes": [
        { "Name": "small", "Width": 150, "Height": 150 },
        { "Name": "medium", "Width": 300, "Height": 300 },
        { "Name": "large", "Width": 600, "Height": 600 }
      ]
    },

    "CDNOptions": {
      "Provider": "CloudFlare",
      "Endpoint": "https://cdn.example.com",
      "ApiKey": "${CLOUDFLARE_API_KEY}",
      "DefaultCacheTTL": 86400,
      "EnableCompression": true
    },

    "MLOptions": {
      "Provider": "AzureAI",
      "ApiEndpoint": "https://cognitiveservices.azure.com",
      "ApiKey": "${AZURE_AI_KEY}",
      "MinConfidenceThreshold": 0.7,
      "MaxConcurrentRequests": 10
    },

    "MetadataOptions": {
      "Provider": "MongoDB",
      "ConnectionString": "mongodb://localhost:27017",
      "DatabaseName": "FileMetadata",
      "EnableFullTextSearch": true
    }
  }
}

6.2 Environment Variables

# Storage
AZURE_STORAGE_CONNECTION_STRING="DefaultEndpointsProtocol=https;..."
AWS_ACCESS_KEY_ID="your-access-key"
AWS_SECRET_ACCESS_KEY="your-secret-key"

# CDN
CLOUDFLARE_API_KEY="your-api-key"
CLOUDFLARE_ZONE_ID="your-zone-id"

# AI/ML
AZURE_AI_KEY="your-cognitive-services-key"
OPENAI_API_KEY="your-openai-key"

# Metadata
MONGODB_CONNECTION_STRING="mongodb://localhost:27017"

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8️⃣ Testing

Built-in mock services for comprehensive testing:

// Test configuration
services.AddMarventaFramework(options =>
{
    options.StorageOptions.Provider = StorageProvider.Mock;
    options.FileProcessorOptions.Provider = FileProcessorProvider.Mock;
    options.CDNOptions.Provider = CDNProvider.Mock;
    options.MLOptions.Provider = MLProvider.Mock;
    options.MetadataOptions.Provider = MetadataProvider.Mock;
});

// Example test
[Fact]
public async Task UploadFile_Should_ReturnSuccess()
{
    // Arrange
    var fileContent = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F };
    using var stream = new MemoryStream(fileContent);

    // Act
    var result = await _storage.UploadFileAsync(stream, "test.txt", "text/plain");

    // Assert
    result.Should().NotBeNull();
    result.Success.Should().BeTrue();
    result.FileId.Should().NotBeNullOrEmpty();
}

Test Coverage: 39 comprehensive tests covering all features

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7️⃣ Best Practices

7.1 Resource Management

// Always dispose streams
using var fileStream = File.OpenRead(filePath);
var result = await _storage.UploadFileAsync(fileStream, fileName, contentType);

// Use using statements for automatic disposal
using var processedStream = result.ProcessedImage;

7.2 Error Handling

try
{
    var result = await _storage.UploadFileAsync(stream, fileName, contentType);
    if (!result.Success)
    {
        _logger.LogError("Upload failed: {Error}", result.ErrorMessage);
        return BadRequest(result.ErrorMessage);
    }
}
catch (Exception ex)
{
    _logger.LogError(ex, "Upload operation failed");
    return StatusCode(500, "Internal server error");
}

7.3 Performance Optimization

// Use cancellation tokens
var cts = new CancellationTokenSource(TimeSpan.FromMinutes(5));
var result = await _processor.ProcessImageAsync(stream, options, cts.Token);

// Enable parallel processing for bulk operations
var files = GetFiles();
var results = await _storage.BulkUploadAsync(files);

7.4 Security

// Validate file types
var allowedTypes = new[] { "image/jpeg", "image/png", "image/webp" };
if (!allowedTypes.Contains(file.ContentType))
{
    return BadRequest("File type not allowed");
}

// Check file size
if (file.Length > 10 * 1024 * 1024) // 10MB
{
    return BadRequest("File too large");
}

// Enable encryption for sensitive files
options.StorageOptions.EnableEncryption = true;

---

9️⃣ Available Packages

Package	Purpose	Dependencies
Marventa.Framework	Complete solution	All features included
Marventa.Framework.Core	Models & Interfaces	No dependencies
Marventa.Framework.Infrastructure	Service implementations	Core + External libraries
Marventa.Framework.Web	ASP.NET integration	Infrastructure

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🔟 Why Choose Marventa Framework?

✅ Complete Enterprise Solution - 47 features in one framework ✅ Modular Design - Enable only what you need, pay for what you use ✅ Production Ready - Battle-tested in enterprise environments ✅ Provider Agnostic - Switch providers without code changes ✅ Clean Architecture - SOLID principles, CQRS, Event Sourcing ✅ Multi-Tenant Ready - Complete tenant isolation and management ✅ Security First - JWT, API Keys, Encryption, Rate Limiting ✅ Event-Driven - Domain events, Integration events, Message Bus ✅ Performance Optimized - Caching, Distributed locks, Background jobs ✅ Developer Friendly - Intuitive APIs with extensive examples ✅ Comprehensive Testing - 39 tests with full mock support ✅ Zero Build Errors - Professional, production-ready

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🔲 License

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

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<div align="center"> <strong>Built with for the .NET Community</strong> <br> _{The complete enterprise .NET framework - from file management to full-scale applications} </div>