Mnemonix v0.5.0 Mnemonix.Stores.Mnesia

A Mnemonix.Store that uses a Mnesia table to store state.

Before using, your current node should be part of a Mnesia schema and the Mnesia application must have been started:

iex> :mnesia.create_schema([node])
iex> {:ok, store} = Mnemonix.Stores.Mnesia.start_link
iex> Mnemonix.put(store, :foo, "bar")
iex> Mnemonix.get(store, :foo)
"bar"
iex> Mnemonix.delete(store, :foo)
iex> Mnemonix.get(store, :foo)
nil

Summary

Functions

Callback implementation for c:Mnemonix.Store.Behaviours.Map.delete/2

Callback implementation for c:Mnemonix.Store.Behaviours.Map.fetch/2

Callback implementation for c:Mnemonix.Store.Behaviours.Map.put/3

Creates a Mnesia table to store state in

Starts a new Mnemonix.Store using the Mnemonix.Stores.Mnesia module

Starts a new Mnemonix.Store using the Mnemonix.Stores.Mnesia module with init opts

Functions

delete(store, key)
delete(Mnemonix.Store.t, Mnemonix.key) ::
  {:ok, Mnemonix.Store.t} |
  Mnemonix.Store.Behaviour.exception

Callback implementation for c:Mnemonix.Store.Behaviours.Map.delete/2.

fetch(store, key)
fetch(Mnemonix.Store.t, Mnemonix.key) ::
  {:ok, Mnemonix.Store.t, {:ok, Mnemonix.value} | :error} |
  Mnemonix.Store.Behaviour.exception

Callback implementation for c:Mnemonix.Store.Behaviours.Map.fetch/2.

put(store, key, value)
put(Mnemonix.Store.t, Mnemonix.key, Mnemonix.Store.value) ::
  {:ok, Mnemonix.Store.t} |
  Mnemonix.Store.Behaviour.exception

Callback implementation for c:Mnemonix.Store.Behaviours.Map.put/3.

setup(opts)
setup(Mnemonix.Store.options) ::
  {:ok, state :: term} |
  {:stop, reason :: any}

Creates a Mnesia table to store state in.

If the table specified already exists, it will use that instead.

Options

  • table: Name of the table to use, will be created if it doesn’t exist.

    Default: Mnemonix.Stores.Mnesia.Table

  • transactional: Whether or not to perform transactional reads or writes.

Allowed: :reads | :writes | :both | nil

Default: :both

The rest of the options are passed into :dets.open_file/2 verbaitm, except for type:, which will always be :set.

start_link(opts \\ [])

Starts a new Mnemonix.Store using the Mnemonix.Stores.Mnesia module.

If you wish to pass configuration options to the module instead, use start_link/2 with an empty opts list.

The returned GenServer.server/0 reference can be used as the primary argument to the Mnemonix API.

Examples

iex> {:ok, store} = Mnemonix.Stores.Mnesia.start_link
iex> Mnemonix.put(store, :foo, "bar")
iex> Mnemonix.fetch(store, :foo)
{:ok, "bar"}
iex> Mnemonix.delete(store, :foo)
iex> Mnemonix.fetch(store, :foo)
:error

Starts a new Mnemonix.Store using the Mnemonix.Stores.Mnesia module with init opts.

The returned GenServer.server/0 reference can be used as the primary argument to the Mnemonix API.