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@model UserViewModel

@using (Html.BeginForm()) 
{ 
  <div>
    @Html.HiddenFor(m => m.Id)
    @Html.TextBoxFor(m => m.FirstName)
    @Html.TextBoxFor(m => m.LastName)
    @Html.DropDownListFor(m => m.CountryId, Model.Countries)
    

dario-l

If you have two days to learn the very basics of modelling, Domain-Driven Design, CQRS and Event Sourcing, here's what you should do:

In the evenings read the [Domain-Driven Design Quickly Minibook]{http://www.infoq.com/minibooks/domain-driven-design-quickly}. During the day watch following great videos (in this order):

1. Eric Evans' [What I've learned about DDD since the book]{http://www.infoq.com/presentations/ddd-eric-evans}
2. Eric Evans' [Strategic Design - Responsibility Traps]{http://www.infoq.com/presentations/design-strategic-eric-evans}
3. Udi Dahan's [Avoid a Failed SOA: Business & Autonomous Components to the Rescue]{http://www.infoq.com/presentations/SOA-Business-Autonomous-Components}
4. Udi Dahan's [Command-Query Responsibility Segregation]{http://www.infoq.com/presentations/Command-Query-Responsibility-Segregation}
5. Greg Young's [Unshackle Your Domain]{http://www.infoq.com/presentations/greg-young-unshackle-qcon08}
6. Eric Evans' [Acknowledging CAP at the Root -- in the Domain Model]{ht

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  <class xmlns="urn:nhibernate-mapping-2.2" lazy="true" schema="timetables" name="PriceList" table="PriceLists">
    <id name="ID/>
    <discriminator type="String">
      <column name="discriminator" />
    </discriminator>
    <version name="Version">
      <column name="Version" />
    </version>
    <property name="Number" type="System.Int32">
      <column name="Number" not-null="true" />

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using Microsoft.Win32;
...
 
RegistryKey masterKey = Registry.LocalMachine.CreateSubKey
   ("SOFTWARE\\Test\\Preferences");
if (masterKey == null)
{
   Console.WriteLine ("Null Masterkey!");
}
else

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    public static class ModuleHandleExtensions
    {
        private static readonly Logger logger = LogManager.GetCurrentClassLogger();

        public static object Handle<T>(
            this NancyModule m,
            Action<T> handle,
            Func<T, object> successResult,
            Func<T, object> failureResult = null)
        {

dario-l

Rough Notes about CQRS and ES

Once upon a time…

I once took notes (almost sentence by sentence with not much editing) about the architectural design concepts - Command and Query Responsibility Segregation (CQRS) and Event Sourcing (ES) - from a presentation of Greg Young and published it as a gist (with the times when a given sentence was heard).

I then found other summaries of the talk and the gist has since been growing up. See the revisions to know the changes and where they came from (aka the sources).

It seems inevitable to throw Domain Driven Design (DDD) in to the mix.

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var Suteki = Suteki || {};

Suteki.new_eventBus = (function(){
    var self = {};
    var subscriptions = {};
    var unsubscribeTokens = [];
    var subscriptionPointers = [];

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public class GetEventStoreRepository : IRepository
{
    private const string EventClrTypeHeader = "EventClrTypeName";
    private const string AggregateClrTypeHeader = "AggregateClrTypeName";
    private const string CommitIdHeader = "CommitId";
    private const int WritePageSize = 500;
    private const int ReadPageSize = 500;

    private readonly Func<Type, Guid, string> _aggregateIdToStreamName;

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void Main()
{
    var pushId = FirebasePushIDGenerator.GeneratePushID();
    Console.WriteLine(pushId);
    Console.WriteLine(FirebasePushIDGenerator.GeneratePushID());
    Console.WriteLine(FirebasePushIDGenerator.GeneratePushID());
    Thread.Sleep(5);
    Console.WriteLine(FirebasePushIDGenerator.GeneratePushID());
    Thread.Sleep(5);
    Console.WriteLine(FirebasePushIDGenerator.GeneratePushID());

dario-l

using System;
using System.Threading.Tasks;

public static class Catch
{
    public static async Task<Optional<Exception>> ExceptionAsync(Func<Task> action)
    {
        var result = Optional<Exception>.Empty;
        try
        {