# GrassHopper

GrassHopper is a tiny abstraction over GenServer, that helps building
dynamically scheduled recursive processes. It allows to efficiently jump
along timestamps and perform user defined actions. Think of a librarian
going through the list of borrowed books and calling the borrowers
as their leases reach the due date.

User of GrassHopper needs to implement two callbacks:

- `next` is called to compute the next timestamp (NaiveDateTime) or nil which will cause
  the process to wait indefinitely or max_timeout
- `perform`: called to perform the operation on a given interval

## Installation

If [available in Hex](, the package can be installed
by adding `grass_hopper` to your list of dependencies in `mix.exs`:

def deps do
    {:grass_hopper, "~> 0.1.0"}

Documentation can be generated with [ExDoc](
and published on [HexDocs]( Once published, the docs can
be found at <>.