This package is a Mediator Pattern implementation in java to use in CQRS pattern, and inspired by great jbogard/mediatr library in .Net.

For decoupling some objects in a system we can use Mediator object as an interface to decrease coupling between the objects. Mostly I uses this pattern when I use CQRS in my system.

TODO

✅ Handling Request/Response message for delivering message to only one handler (Commands, Queries)

✅ Handling Notification message for delivering message to multiple handlers (Events)

✅ Pipelenes Behaviours for handling some cross cutting concerns before or after executing handlers

Mediator library has two strategies for dispatching messages:

1. Request/Response messages, dispatched to a single handler.
2. Notification messages, dispatched to all (multiple) handlers and they don't have any response.

The request/response message, has just one handler, and can handle both command and query scenarios in CQRS Pattern.

The notification message, can have multiple handlers and doesn't have any response, and it can handle an event notification or notification in event driven architecture.

Sometimes we need to add some cross-cutting concerns before after running our request handlers like logging, metrics, circuit breaker, retry, etc. In this case we can use PipelineBehavior. It is actually is like a middleware or decorator pattern.

These behaviors will execute before or after running our request handlers with calling Send method for a request on the Mediator.

If you like feel free to ⭐ this repository, It helps out :)

Thanks a bunch for supporting me!

The application is in development status. You are feel free to submit a pull request or create an issue for any bugs or suggestions.

This library is under MIT license.