psycopg

class litestar.channels.backends.psycopg.PsycoPgChannelsBackend

Bases: ChannelsBackend

__init__(pg_dsn: str) → None

async on_startup() → None

Called by the plugin on application startup

async on_shutdown() → None

Called by the plugin on application shutdown

async publish(data: bytes, channels: Iterable[str]) → None

Publish the message data to all channels

async subscribe(channels: Iterable[str]) → None

Start listening for events on channels

async unsubscribe(channels: Iterable[str]) → None

Stop listening for events on channels

async stream_events() → AsyncGenerator[tuple[str, bytes], None]

Return a generator, iterating over events of subscribed channels as they become available

async get_history(channel: str, limit: int | None = None) → list[bytes]

Return the event history of channel, at most limit entries