Returns a specification to start this module under a supervisor.

See Supervisor.

Retrieves the value for the configured :indexer_key from the event's data payload.

Options

• :indexer_key — required, specified the field to lookup within the event data

Examples

iex> event = %{
...>   "event_type" => "ClutchLaid", 
...>   "event_data" => %{"turtle_id" => "t1", "clutch_id" => "c1", "eggs" => 42}, 
...>   "event_tags" => ["turtle:t1", "clutch:c1"], 
...>   "stream_id" => "turtle_mating-1234",
...>   "stream_position" => 3
...> }
iex> Fact.EventDataIndexer.index_event(event, [indexer_key: "eggs"])
"42"

iex> event = %{
...>   "event_type" => "EggHatched", 
...>   "event_data" => %{"turtle_id" => "t2", "clutch_id" => "c1"}, 
...>   "event_tags" => ["turtle:t2", "clutch:c1"], 
...> } 
iex> Fact.EventDataIndexer.index_event(event, [indexer_key: "turtle_id"])
"t2"

iex> event = %{
...>   "event_type" => "DatabaseCreated", 
...>   "event_data" => %{"database_id" => "RVX27QR6PFDORJZF24C4DIICSQ"}, 
...>   "stream_id" => "__fact", 
...>   "stream_position" => "1"
...> }
iex> Fact.EventDataIndexer.index_event(event, [indexer_key: "turtle_id"])
nil

@spec indexer_name() :: String.t()

Gets the friendly name for the indexer.

This is included in the file path where index files are stored on disk.

@spec start_link([Fact.EventIndexer.option()]) :: GenServer.on_start()

Starts the indexer process.