README.md

VarsFS

Application variables filesystem

What is it?

So far it's a python library, based on fusepy library, that allows you to expose whatever value you want from your app, tipically metrics or config values, as files in a directory.

Files can be read-only or read-write(able).

Usage

• See requirements.txt for required libraries.

• Check main.py for a working example.

API

VarsFS object

VarsFS(mountpoint)

Takes only one argument; the fullpath to the mount point. Returns a new instance of VarsFS.

Add(varname, getter_fn, setter_fn=None)

Creates a "file" named as the value of varname into mountpoint. Read operations will call the getter_fn and write operations will call setter_fn.

getter_fn must be declared so to receive one argument (the variable name)

def some_getter(varname):
  ...

setter_fn must be declared so to receive two arguments (the variable name and the value to be assigned)

def some_setter(varname, data):
  ...

Run(foreground=True)

Starts the file system. If foreground is set to False, will start the filesystem on a separated thread, otherwise will block execution.