dcomartin

System Architecture Course

This course provides a structured approach for designing and implementing large systems that are scalable and highly available.

The challenges designing and building large systems are in how they are decomposed and communicate with each other. You will learn how to define boundaries based on business capabilities and implement asynchronous messaging for communication.

This course will show architectural patterns and styles that create a system that is resilient when failures occur. And when load and traffic increases are scalable horizontally on-demand as required.

I've developed this course based on my over two decades of experience designing and developing business systems in distribution, transportation, manufacturing, and accounting.

dcomartin

public class PlaceOrderHandler : RequestHandler<PlaceOrder>
{
    private readonly IAmACommandProcessor _commandProcessor;

    public PlaceOrderHandler(IAmACommandProcessor commandProcessor)
    {
        _commandProcessor = commandProcessor;
    }

    [UsePolicy(CommandProcessor.RETRYPOLICY, 3)]

dcomartin

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();

    services.AddSales();
    services.AddShipping();

    services
        .AddLogging(builder =>
        {

dcomartin

public class OrdersController : Controller
{
    private readonly IAmACommandProcessor _commandProcessor;

    public OrdersController(IAmACommandProcessor commandProcessor)
    {
        _commandProcessor = commandProcessor;
    }

    [HttpPost("/sales/orders/{orderId:Guid}")]

dcomartin

public class OrdersController : Controller
{
    private readonly IAmACommandProcessor _commandProcessor;

    public OrdersController(IAmACommandProcessor commandProcessor)
    {
        _commandProcessor = commandProcessor;
    }

    [HttpPost("/sales/orders/{orderId:Guid}")]

dcomartin

public class DemoBehavior : IPipelineBehavior<PlaceOrder, Unit>
{
    private readonly ILogger<DemoBehavior> _logger;

    public DemoBehavior(ILogger<DemoBehavior> logger)
    {
        _logger = logger;
    }

    public async Task<Unit> Handle(PlaceOrder request, CancellationToken cancellationToken, RequestHandlerDelegate<Unit> next)

dcomartin

using System;
using System.Security.Claims;
using System.Threading;
using System.Threading.Tasks;
using DotNetCore.CAP;
using MediatR;
using MediatR.Pipeline;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;

dcomartin

namespace Sales.Contracts
{
    public class OrderPlaced
    {
        public Guid OrderId { get; set; }
        public Address ShippingAddress { get; set; }
    }

    public class Address
    {

dcomartin

namespace Sales.Contracts
{
    public class OrderPlaced
    {
        public Guid OrderId { get; set; }
    }
}

dcomartin

using Unity;
using Unity.Lifetime;

namespace UnityFactory
{
    class Program
    {
        static void Main(string[] args)
        {
            var container = new UnityContainer();