Command Bus¶
A command bus is a design pattern used in software development, particularly in the context of Domain-Driven Design (DDD) and CQRS (Command Query Responsibility Segregation). It helps to decouple the sender of a command from its handler, allowing for better separation of concerns and improving the overall architecture of the application.
A command bus works together with commands and command handlers.
Here’s a simplified overview of how a command bus works:
The sender, e.g., a controller in a web application, creates a command object and sends it to the command bus
The command bus examines the command object and identifies the appropriate command handler based on the type of the commandé
The command bus dispatches the command to the identified command handler
The command handler processes the command and performs the required actions.
See also What is a command bus and why should you use it? and Command Bus.
Related : Code Architecture, Command, Message Bus
Related packages : league/tactician, simple-bus/message-bus, simple-bus/symfony-bridge
