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Remote controlled frontend framework for Phoenix.
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lib/drab/live/cache.ex
defmodule Drab.Live.Cache do
@moduledoc """
This is the Drab.Live internal cache module. It doesn't expose any API.
### Cache File
Drab.Live stores internal information in the file `priv/hashes_expressions.drab.cache`. To clean up the cache
just delete it, but only with the `mix clean` command, to ensure all Drab.Live templates will recompile.
"""
@cache_file "hashes_expressions.drab.cache"
# @name __MODULE__
require Logger
#TODO: clean the table on mix clean
@env Mix.env()
defp env(), do: @env
# This module is the DETS cache for Drab Live expressions, amperes, partials, and shadow buffers.
# DETS table is created and filled up during the compile-time.
@doc false
def start() do
# if :dets.info(cache_file()) == :undefined do
{:ok, _} = :dets.open_file(cache_file(), [type: :set, ram_file: true])
# end
:ok
end
@doc false
def stop() do
:dets.close(cache_file())
end
# Runtime function. Lookup in the already opened ETS cache
@doc false
def get(k) do
val = case :dets.lookup(cache_file(), k) do
[{_, v}] -> v
[] -> nil
_ -> raise "Can't find the expression or hash #{inspect k} in the Drab.Live.Cache"
end
val
end
@doc false
def set(k, v) do
:dets.insert(cache_file(), {k, v})
:dets.sync(cache_file())
end
@doc false
def add(k, v) do
list = get(k) || []
:dets.insert(cache_file(), {k, list ++ [v]})
:dets.sync(cache_file())
end
@doc false
def cache_file() do
"#{Path.join(Drab.Config.app_name() |> :code.priv_dir() |> to_string(), @cache_file)}.#{env()}"
end
end