Introduction

Mollitia is heavily inspired by Resilience4j and Polly.

It provides a collection of Modules that can be attached to a Circuit. You can then execute a asynchronous operation on the circuit, and the attached modules will be triggered when needed.

Cool Features

It works on browsers, what about you add it to your frontend so that you avoid bursting your service?
It works on NodeJS, what about you add it to your service so that you avoid bursting external services?
A Circuit Method Agnostic, meaning it is not stucked with one method, and you can change at will.
Modules provides a wide range of events to help monitoring and analyzing.
Modules can be shared by multiple circuits.

Modules

Modules can be attached to your circuit, you should take a look at the circuit documentation before looking at them.

You can modify your circuit behavior by adding modules, some basic resiliency patterns are already available directly in the library, find the list just below.

If your application need a more specific behavior, you can create your own module, folowing this documentation.

Core Modules

Fallback: Allows filtering and planning when errors are happening.
Cache: Cache a response, and provide fast for time, and performance optimization.
Retry: When something fails, it'll work next time.
Timeout: If it takes too long, it maybe be already broken.
Ratelimit: Do not burst requests, limit yourself.
Bulkhead: Allows of certain amount of concurrent requests, and a queue for others.
Sliding Count Circuit Breaker: Breaks when errors happens, with a circular array memory.
Sliding Time Circuit Breaker: Breaks when errors happens, with a circular array memory, in a range of time.

Addons

Addons can modify or add features of Mollitia, for example, it can be useful to create an addon in order to modify the behavior of all modules.

If you want to create your own, find out how here.

A list of official addons can be found just below.

Core Addons

Prometheus: Adds multiple metrics to your modules and circuits.