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zumba/cqrs
==========

CQRS Library

v2.0.0(2y ago)218.0k↓32.4%[2 issues](https://github.com/zumba/cqrs/issues)MITPHPPHP ^8.0

Since Jun 23Pushed 2y ago28 watchersCompare

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READMEChangelog (4)Dependencies (4)Versions (6)Used By (0)

Zumba ***CQRS***
================

[](#zumba-cqrs)

[Command Query Responsibility Segregation (*CQRS*)](https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs)is an established design pattern. This library aims to implement the *plumbing* needed to create CQRS commands and queries.

---

- [Command Bus Usage](#command-bus-usage)
    - [Creating a command](#creating-a-command)
    - [Creating a command handler](#creating-a-command-handler)
    - [Dispatching a command](#dispatching-a-command)
- [Query Bus Usage](#query-bus-usage)
    - [Creating a query handler](#create-a-query-handler)
    - [Dispatching a query](#dispatching-a-query)
- [Providers](#providers)
    - [Class provider](#class-provider)
    - [Method provider](#method-provider)
    - [Simple dependency provider](#simple-dependency-provider)
    - [Create a custom provider](#create-a-custom-provider)
- [Middleware](#middleware)
    - [Logger middleware](#logger-middleware)
    - [Custom middleware](#custom-middleware)

---

Command Bus Usage
-----------------

[](#command-bus-usage)

The command bus allows commands with handlers to be dispatched with the result being either a `Success` or `Failure`.

By design, the command must not return any data.

### Creating a command

[](#creating-a-command)

Creating a command DTO to dispatch to the command bus requires us to extend the abstract `Command` class.

```