CODESAMPLE

Cluster-based Architecture - C#

Cluster-based Architecture C_sharp

The Cluster-based Architecture pattern divides a complex problem into smaller, independent clusters, each responsible for a specific sub-problem. These clusters communicate through well-defined, minimal interfaces. This enhances modularity, testability, and allows for independent scaling and modification of individual clusters.

The C# example demonstrates this by creating OrderCluster, PaymentCluster, and InventoryCluster classes. Each cluster has a specific responsibility & publicly exposed method to interact with. A Shop class orchestrates the overall process by interacting with these clusters. This approach utilizes classes and interfaces, aligning with C#’s OOP principles, to enforce separation of concerns. The use of simplified method signatures mirrors a microservices approach, focusing on clear communication between components – a common practice in modern C# systems.

// Interfaces defining cluster communication
public interface IOrderCluster
{
    bool PlaceOrder(Order order);
}

public interface IPaymentCluster
{
    bool ProcessPayment(Payment payment);
}

public interface IInventoryCluster
{
    bool ReserveInventory(InventoryReservation reservation);
}

// Cluster Implementations
public class OrderCluster : IOrderCluster
{
    public bool PlaceOrder(Order order)
    {
        // Order processing logic
        Console.WriteLine($"Order placed: {order.OrderId}");
        return true;
    }
}

public class PaymentCluster : IPaymentCluster
{
    public bool ProcessPayment(Payment payment)
    {
        // Payment processing logic
        Console.WriteLine($"Payment processed for amount: {payment.Amount}");
        return true;
    }
}

public class InventoryCluster : IInventoryCluster
{
    public bool ReserveInventory(InventoryReservation reservation)
    {
        // Inventory reservation logic
        Console.WriteLine($"Inventory reserved: {reservation.Quantity} of item {reservation.ItemId}");
        return true;
    }
}

// Data Models (Simplified)
public class Order { public int OrderId { get; set; } }
public class Payment { public decimal Amount { get; set; } }
public class InventoryReservation { public int ItemId { get; set; } public int Quantity { get; set; } }

// Orchestrator
public class Shop
{
    private readonly IOrderCluster _orderCluster;
    private readonly IPaymentCluster _paymentCluster;
    private readonly IInventoryCluster _inventoryCluster;

    public Shop(IOrderCluster orderCluster, IPaymentCluster paymentCluster, IInventoryCluster inventoryCluster)
    {
        _orderCluster = orderCluster;
        _paymentCluster = paymentCluster;
        _inventoryCluster = inventoryCluster;
    }

    public bool Purchase(Order order, Payment payment, InventoryReservation reservation)
    {
        if (_inventoryCluster.ReserveInventory(reservation) && _paymentCluster.ProcessPayment(payment))
        {
            return _orderCluster.PlaceOrder(order);
        }
        return false;
    }
}

// Example Usage
public class Program
{
    public static void Main(string[] args)
    {
        var orderCluster = new OrderCluster();
        var paymentCluster = new PaymentCluster();
        var inventoryCluster = new InventoryCluster();

        var shop = new Shop(orderCluster, paymentCluster, inventoryCluster);

        var order = new Order { OrderId = 123 };
        var payment = new Payment { Amount = 100.00m };
        var reservation = new InventoryReservation { ItemId = 456, Quantity = 2 };

        bool purchaseSuccessful = shop.Purchase(order, payment, reservation);

        Console.WriteLine($"Purchase successful: {purchaseSuccessful}");
    }
}