Hammer

A fork of ExHammer/hammer altered to focus purely on using a Redis backend.

Installation

This fork of Hammer is currently only available on github. The package can be installed by adding hammer to your list of dependencies along with the github url in mix.exs:

def deps do
  [{:hammer, github: "turnhub/hammer"}]
end

Documentation

The core API of Hammer remains unchanged, so the official documentation can be referenced for most functions.

On hexdocs: https://hexdocs.pm/hammer/frontpage.html

The Tutorial is an especially good place to start.

Usage

Example:

defmodule MyApp.VideoUpload do

  def upload(video_data, user_id) do
    case Hammer.check_rate("upload_video:#{user_id}", 60_000, 5) do
      {:allow, _count} ->
        # upload the video, somehow
      {:deny, _limit} ->
        # deny the request
    end
  end

end

The Hammer module provides the following functions:

• check_rate(id, scale_ms, limit)
• check_rate_inc(id, scale_ms, limit, increment)
• inspect_bucket(id, scale_ms, limit)
• delete_buckets(id)

The Redis backend is configured via Mix.Config using a Redis URL:

config :hammer,
  redis_url: "redis://localhost:6379/1?expiry_ms=7200000&pool_size=4&pool_max_overflow=0"

Getting Help

If you're having trouble, open an issue on this repo