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etg24/eventsourcing
===================

A TYPO3 Flow package for using EventSourcing

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Etg24.EventSourcing
===================

[](#etg24eventsourcing)

This package provides basic CQRS/ES infrastructure for [TYPO3 Flow](http://flow.typo3.org).

Its purpose is to provide inspiration for writing your own customized set of tools for working with CQRS/ES. *I do not recommend using this package without understanding the underlaying concepts first.*

Installation
------------

[](#installation)

```
$ composer require etg24/eventsourcing dev-master

```

Commands
--------------------------------------------

[](#commands)

Commands define the interface to your domain model. They enter the *[command bus](#command_bus)* and will then be handled (sync/async) by *[command handlers](#command_handlers)*. Commands do never return any data, thus the interface for handling commands is of type `void`.

### Defining commands

[](#defining-commands)

You can define a command by extending from `Etg24\EventSourcing\Command\Command` (I will soonish update the code base to use the `CommandInterface` instead, but until then you need to inherit from `Command`). The command has a `commandId` that can be used for logging purposes, if so desired.

```