NatsJSFastProducer(
*,
parser: Optional[CustomCallable],
decoder: Optional[CustomCallable],
)
Bases: NatsFastProducer
A class to represent a NATS JetStream producer.
Source code in faststream/nats/publisher/producer.py
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162 | def __init__(
self,
*,
parser: Optional["CustomCallable"],
decoder: Optional["CustomCallable"],
) -> None:
self.serializer: SerializerProto | None = None
self.codec: CodecProto = DefaultCodec()
default = NatsParser(pattern="", is_ack_disabled=True)
self._parser = ParserComposition(parser, default.parse_message)
self._decoder = ParserComposition(decoder, default.decode_message)
self.__state: ConnectionState[JetStreamContext] = EmptyConnectionState()
|
instance-attribute
serializer: SerializerProto | None = None
instance-attribute
codec: CodecProto = DefaultCodec()
connect(
connection: JetStreamContext,
serializer: Optional[SerializerProto],
codec: Optional[CodecProto] = None,
) -> None
Source code in faststream/nats/publisher/producer.py
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172 | def connect(
self,
connection: "JetStreamContext",
serializer: Optional["SerializerProto"],
codec: Optional["CodecProto"] = None,
) -> None:
self.serializer = serializer
self.codec = codec or DefaultCodec()
self.__state = ConnectedState(connection)
|
Source code in faststream/nats/publisher/producer.py
| def disconnect(self) -> None:
self.__state = EmptyConnectionState()
|
async
Source code in faststream/nats/publisher/producer.py
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192 | @override
async def publish(self, cmd: "NatsPublishCommand") -> "PubAck":
payload, content_type = await self.codec.encode(cmd.body, self.serializer)
headers_to_send = {
"content-type": content_type or "",
**cmd.headers_to_publish(js=True),
}
return await self.__state.connection.publish(
subject=cmd.destination,
payload=payload,
headers=headers_to_send,
stream=cmd.stream,
timeout=cmd.timeout,
)
|
async
Source code in faststream/nats/publisher/producer.py
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229 | @override
async def request(self, cmd: "NatsPublishCommand") -> "Msg":
payload, content_type = await self.codec.encode(cmd.body, self.serializer)
reply_to = self.__state.connection._nc.new_inbox()
future: asyncio.Future[Msg] = asyncio.Future()
sub = await self.__state.connection._nc.subscribe(
reply_to,
future=future,
max_msgs=1,
)
await sub.unsubscribe(limit=1)
headers_to_send = {
"content-type": content_type or "",
"reply_to": reply_to,
**cmd.headers_to_publish(js=False),
}
with anyio.fail_after(cmd.timeout):
await self.__state.connection.publish(
subject=cmd.destination,
payload=payload,
headers=headers_to_send,
stream=cmd.stream,
timeout=cmd.timeout,
)
msg = await future
if ( # pragma: no cover
msg.headers and (msg.headers.get(Header.STATUS) == NO_RESPONDERS_STATUS)
):
raise nats.errors.NoRespondersError
return msg
|
async
Source code in faststream/nats/publisher/producer.py
| @override
async def publish_batch(self, cmd: "NatsPublishCommand") -> None:
msg = "NATS doesn't support publishing in batches."
raise FeatureNotSupportedException(msg)
|