# `Bandera.Notifications.Redis`

Redis PubSub cache-busting notifier (via Redix). Subscribes to a channel and,
on a flag change published by ANOTHER node, busts the local cache entry for
that flag. Self-published changes are ignored. Connection options are read at
runtime from `config :bandera, cache_bust_notifications: [redis: <Redix opts>]`.

Note: incoming change payloads come from a shared channel. The flag name is
resolved with `String.to_existing_atom/1`, so notifications for flags this node
has never referenced are ignored (and the atom table can't be exhausted by
foreign publishers).

# `child_spec`

Returns a specification to start this module under a supervisor.

See `Supervisor`.

# `start_link`

```elixir
@spec start_link(keyword()) :: GenServer.on_start()
```

Starts the notifier GenServer, which opens its own Redis pub and sub connections.

# `subscribed?`

```elixir
@spec subscribed?() :: boolean()
```

Whether the PubSub subscription has been confirmed (useful in tests).

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*Consult [api-reference.md](api-reference.md) for complete listing*