BrokerRouter

faststream.broker.router.BrokerRouter #

BrokerRouter(
    prefix: str = "",
    handlers: Sequence[
        BrokerRoute[MsgType, SendableMessage]
    ] = (),
    dependencies: Sequence[Depends] = (),
    middlewares: Optional[
        Sequence[
            Callable[
                [StreamMessage[MsgType]],
                AsyncContextManager[None],
            ]
        ]
    ] = None,
    parser: Optional[
        CustomParser[MsgType, StreamMessage[MsgType]]
    ] = None,
    decoder: Optional[
        CustomDecoder[StreamMessage[MsgType]]
    ] = None,
)

Bases: Generic[PublisherKeyType, MsgType]

A generic class representing a broker router.

METHOD	DESCRIPTION
`_get_publisher_key`	abstract method to get the publisher key
`_update_publisher_prefix`	abstract method to update the publisher prefix
`__init__`	constructor method
`subscriber`	abstract method to define a subscriber
`_wrap_subscriber`	method to wrap a subscriber function
`publisher`	abstract method to define a publisher
`include_router`	method to include a router
`include_routers`	method to include multiple routers

Note

The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)

Initialize a class object.

PARAMETER	DESCRIPTION
`prefix`	Prefix for the object. TYPE: `str` DEFAULT: `''`
`handlers`	Handlers for the object. TYPE: `Sequence[BrokerRoute[MsgType, SendableMessage]]` DEFAULT: `()`
`dependencies`	Dependencies for the object. TYPE: `Sequence[Depends]` DEFAULT: `()`
`middlewares`	Middlewares for the object. TYPE: `Optional[Sequence[Callable[[StreamMessage[MsgType]], AsyncContextManager[None]]]]` DEFAULT: `None`
`parser`	Parser for the object. TYPE: `Optional[CustomParser[MsgType]]` DEFAULT: `None`
`decoder`	Decoder for the object. TYPE: `Optional[CustomDecoder[StreamMessage[MsgType]]]` DEFAULT: `None`

Note

The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)

Source code in faststream/broker/router.py

def __init__(
    self,
    prefix: str = "",
    handlers: Sequence[BrokerRoute[MsgType, SendableMessage]] = (),
    dependencies: Sequence[Depends] = (),
    middlewares: Optional[
        Sequence[
            Callable[
                [StreamMessage[MsgType]],
                AsyncContextManager[None],
            ]
        ]
    ] = None,
    parser: Optional[CustomParser[MsgType, StreamMessage[MsgType]]] = None,
    decoder: Optional[CustomDecoder[StreamMessage[MsgType]]] = None,
):
    """Initialize a class object.

    Args:
        prefix (str): Prefix for the object.
        handlers (Sequence[BrokerRoute[MsgType, SendableMessage]]): Handlers for the object.
        dependencies (Sequence[Depends]): Dependencies for the object.
        middlewares (Optional[Sequence[Callable[[StreamMessage[MsgType]], AsyncContextManager[None]]]]): Middlewares for the object.
        parser (Optional[CustomParser[MsgType]]): Parser for the object.
        decoder (Optional[CustomDecoder[StreamMessage[MsgType]]]): Decoder for the object.
    !!! note

        The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)
    """
    self.prefix = prefix
    self._handlers = list(handlers)
    self._publishers = {}
    self._dependencies = dependencies
    self._middlewares = middlewares
    self._parser = parser
    self._decoder = decoder

prefix `instance-attribute` #

prefix: str = prefix

include_router #

include_router(
    router: BrokerRouter[PublisherKeyType, MsgType]
) -> None

Includes a router in the current object.

PARAMETER	DESCRIPTION
`router`	The router to be included. TYPE: `BrokerRouter[PublisherKeyType, MsgType]`

RETURNS	DESCRIPTION
`None`	None

Note

The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)

Source code in faststream/broker/router.py

def include_router(self, router: "BrokerRouter[PublisherKeyType, MsgType]") -> None:
    """Includes a router in the current object.

    Args:
        router: The router to be included.

    Returns:
        None
    !!! note

        The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)
    """
    for h in router._handlers:
        self.subscriber(*h.args, **h.kwargs)(h.call)

    for p in router._publishers.values():
        p = self._update_publisher_prefix(self.prefix, p)
        key = self._get_publisher_key(p)
        self._publishers[key] = self._publishers.get(key, p)

include_routers #

include_routers(
    *routers: BrokerRouter[PublisherKeyType, MsgType]
) -> None

Includes routers in the object.

PARAMETER	DESCRIPTION
`*routers`	Variable length argument list of routers to include. TYPE: `BrokerRouter[PublisherKeyType, MsgType]` DEFAULT: `()`

RETURNS	DESCRIPTION
`None`	None

Note

The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)

Source code in faststream/broker/router.py

def include_routers(
    self, *routers: "BrokerRouter[PublisherKeyType, MsgType]"
) -> None:
    """Includes routers in the object.

    Args:
        *routers: Variable length argument list of routers to include.

    Returns:
        None
    !!! note

        The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)
    """
    for r in routers:
        self.include_router(r)

publisher `abstractmethod` #

publisher(
    subj: str, *args: Any, **kwargs: Any
) -> BasePublisher[MsgType]

Publishes a message.

PARAMETER	DESCRIPTION
`subj`	Subject of the message TYPE: `str`
`*args`	Additional arguments TYPE: `Any` DEFAULT: `()`
`**kwargs`	Additional keyword arguments TYPE: `Any` DEFAULT: `{}`

RETURNS	DESCRIPTION
`BasePublisher[MsgType]`	The published message

RAISES	DESCRIPTION
`NotImplementedError`	If the method is not implemented

Note

The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)

Source code in faststream/broker/router.py

@abstractmethod
def publisher(
    self,
    subj: str,
    *args: Any,
    **kwargs: Any,
) -> BasePublisher[MsgType]:
    """Publishes a message.

    Args:
        subj: Subject of the message
        *args: Additional arguments
        **kwargs: Additional keyword arguments

    Returns:
        The published message

    Raises:
        NotImplementedError: If the method is not implemented
    !!! note

        The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)
    """
    raise NotImplementedError()

subscriber `abstractmethod` #

subscriber(
    subj: str,
    *args: Any,
    dependencies: Sequence[Depends] = (),
    middlewares: Optional[
        Sequence[
            Callable[
                [StreamMessage[MsgType]],
                AsyncContextManager[None],
            ]
        ]
    ] = None,
    parser: Optional[
        CustomParser[MsgType, StreamMessage[MsgType]]
    ] = None,
    decoder: Optional[
        CustomDecoder[StreamMessage[MsgType]]
    ] = None,
    **kwargs: Any
) -> Callable[
    [Callable[P_HandlerParams, T_HandlerReturn]],
    HandlerCallWrapper[
        MsgType, P_HandlerParams, T_HandlerReturn
    ],
]

A function to subscribe to a subject.

PARAMETER	DESCRIPTION
`subj`	subject to subscribe to
`*args`	additional arguments DEFAULT: `()`
`dependencies`	sequence of dependencies DEFAULT: `()`
`middlewares`	optional sequence of middlewares DEFAULT: `None`
`parser`	optional custom parser DEFAULT: `None`
`decoder`	optional custom decoder DEFAULT: `None`
`**kwargs`	additional keyword arguments DEFAULT: `{}`

RETURNS	DESCRIPTION
`Callable[[Callable[P_HandlerParams, T_HandlerReturn]], HandlerCallWrapper[MsgType, P_HandlerParams, T_HandlerReturn]]`	A callable handler function

RAISES	DESCRIPTION
`NotImplementedError`	If the function is not implemented

Note

The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)

Source code in faststream/broker/router.py

@abstractmethod
def subscriber(
    self,
    subj: str,
    *args: Any,
    dependencies: Sequence[Depends] = (),
    middlewares: Optional[
        Sequence[
            Callable[
                [StreamMessage[MsgType]],
                AsyncContextManager[None],
            ]
        ]
    ] = None,
    parser: Optional[CustomParser[MsgType, StreamMessage[MsgType]]] = None,
    decoder: Optional[CustomDecoder[StreamMessage[MsgType]]] = None,
    **kwargs: Any,
) -> Callable[
    [Callable[P_HandlerParams, T_HandlerReturn]],
    HandlerCallWrapper[MsgType, P_HandlerParams, T_HandlerReturn],
]:
    """A function to subscribe to a subject.

    Args:
        subj : subject to subscribe to
        *args : additional arguments
        dependencies : sequence of dependencies
        middlewares : optional sequence of middlewares
        parser : optional custom parser
        decoder : optional custom decoder
        **kwargs : additional keyword arguments

    Returns:
        A callable handler function

    Raises:
        NotImplementedError: If the function is not implemented
    !!! note

        The above docstring is autogenerated by docstring-gen library (https://docstring-gen.airt.ai)
    """
    raise NotImplementedError()

Last update: 2023-11-13

BrokerRouter

faststream.broker.router.BrokerRouter #

prefix instance-attribute #

include_router #

include_routers #

publisher abstractmethod #

subscriber abstractmethod #

prefix `instance-attribute` #

publisher `abstractmethod` #

subscriber `abstractmethod` #