faust.channels
¶
Channel.
A channel is used to send values to streams.
The stream will iterate over incoming events in the channel.
-
class
faust.channels.
Channel
(app: faust.types.app.AppT, *, key_type: Union[Type[faust.types.models.ModelT], Type[bytes], Type[str]] = None, value_type: Union[Type[faust.types.models.ModelT], Type[bytes], Type[str]] = None, is_iterator: bool = False, queue: mode.utils.queues.ThrowableQueue = None, maxsize: int = None, root: faust.types.channels.ChannelT = None, active_partitions: Set[faust.types.tuples.TP] = None, loop: asyncio.events.AbstractEventLoop = None) → None[source]¶ Create new channel.
- Parameters
app (
AppT
[]) – The app that created this channel (app.channel()
)key_type (
Union
[Type
[ModelT
],Type
[bytes
],Type
[str
],None
]) – The Model used for keys in this channel.value_type (
Union
[Type
[ModelT
],Type
[bytes
],Type
[str
],None
]) – The Model used for values in this channel.maxsize (
Optional
[int
]) – The maximum number of messages this channel can hold. If exceeded any newput
call will block until a message is removed from the channel.loop (
Optional
[AbstractEventLoop
]) – Theasyncio
event loop to use.
-
queue
¶ - Return type
-
clone
(*, is_iterator: bool = None, **kwargs) → faust.types.channels.ChannelT[source]¶ - Return type
ChannelT
[]
-
clone_using_queue
(queue: asyncio.queues.Queue) → faust.types.channels.ChannelT[source]¶ - Return type
ChannelT
[]
-
stream
(**kwargs) → faust.types.streams.StreamT[source]¶ Create stream reading from this channel.
- Return type
StreamT
[+T_co]
-
as_future_message
(key: Union[bytes, faust.types.core._ModelT, Any, None] = None, value: Union[bytes, faust.types.core._ModelT, Any] = None, partition: int = None, timestamp: float = None, headers: Union[List[Tuple[str, bytes]], Mapping[str, bytes]] = None, key_serializer: Union[faust.types.codecs.CodecT, str, None] = None, value_serializer: Union[faust.types.codecs.CodecT, str, None] = None, callback: Callable[faust.types.tuples.FutureMessage, Union[None, Awaitable[None]]] = None) → faust.types.tuples.FutureMessage[source]¶ - Return type
-
prepare_headers
(headers: Union[List[Tuple[str, bytes]], Mapping[str, bytes], None]) → Union[List[Tuple[str, bytes]], MutableMapping[str, bytes]][source]¶
-
prepare_key
(key: Union[bytes, faust.types.core._ModelT, Any, None], key_serializer: Union[faust.types.codecs.CodecT, str, None]) → Any[source]¶ - Return type
-
prepare_value
(value: Union[bytes, faust.types.core._ModelT, Any], value_serializer: Union[faust.types.codecs.CodecT, str, None]) → Any[source]¶ - Return type
-
coroutine
decode
(self, message: faust.types.tuples.Message, *, propagate: bool = False) → faust.types.events.EventT[source]¶ - Return type
EventT
[]
-
coroutine
get
(self, *, timeout: Union[datetime.timedelta, float, str] = None) → Any[source]¶ - Return type
-
coroutine
on_decode_error
(self, exc: Exception, message: faust.types.tuples.Message) → None[source]¶ - Return type
None
-
coroutine
on_key_decode_error
(self, exc: Exception, message: faust.types.tuples.Message) → None[source]¶ - Return type
None
-
coroutine
on_value_decode_error
(self, exc: Exception, message: faust.types.tuples.Message) → None[source]¶ - Return type
None
-
coroutine
publish_message
(self, fut: faust.types.tuples.FutureMessage, wait: bool = True) → Awaitable[faust.types.tuples.RecordMetadata][source]¶ - Return type
-
coroutine
send
(self, *, key: Union[bytes, faust.types.core._ModelT, Any, None] = None, value: Union[bytes, faust.types.core._ModelT, Any] = None, partition: int = None, timestamp: float = None, headers: Union[List[Tuple[str, bytes]], Mapping[str, bytes]] = None, key_serializer: Union[faust.types.codecs.CodecT, str, None] = None, value_serializer: Union[faust.types.codecs.CodecT, str, None] = None, callback: Callable[faust.types.tuples.FutureMessage, Union[None, Awaitable[None]]] = None, force: bool = False) → Awaitable[faust.types.tuples.RecordMetadata][source]¶ Send message to channel.
- Return type