gtrefs/playing_with_projections

Preparation of a workshop

Important information for DDDEurope.

If you follow this workshop at DDDEurope, please read this README. It would be nice if you already clone this repo and check a client in your favorite technology. If the client runs that is enough to get started. We will complete the first steps together in the workshop.

Getting started

Clone or fork this repo.

Choose your preferred technology

Look in the client directories to get started in your preferred technology:

• Java
• C# (classic)
• C# (dotnet core)
• F#
• javascript
• Ruby
• Elixir
• Elm
• Php

Make it run

Read the README.md of the choosen technology, and make it run.

First step

Modify the code to print:

• The number of events in the stream.
• The distinct type of events in the stream.

Short description

The event stream contains several types of events. The event stream is a JSON array of events. An event is structured like this:

{
  'id': 'a unique id for this event'
  'type': 'the type of the event',
  'timestamp': 'the moment the event happened',
  'payload': {
    // key-value pairs specific to the event type
    'key1': 'value1',
    'key2': 'value2';
    ...
  }
}