095a848f30
Register an `unsubscribe_fn` when initializing the TrioSubscriptionAPI. `unsubscribe_fn` is called when subscription is unsubscribed.
147 lines
3.7 KiB
Python
147 lines
3.7 KiB
Python
from abc import ABC, abstractmethod
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from typing import (
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TYPE_CHECKING,
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AsyncContextManager,
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AsyncIterable,
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KeysView,
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List,
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Tuple,
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)
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from async_service import ServiceAPI
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from libp2p.peer.id import ID
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from libp2p.typing import TProtocol
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from .pb import rpc_pb2
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from .typing import ValidatorFn
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if TYPE_CHECKING:
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from .pubsub import Pubsub # noqa: F401
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class ISubscriptionAPI(
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AsyncContextManager["ISubscriptionAPI"], AsyncIterable[rpc_pb2.Message]
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):
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@abstractmethod
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async def unsubscribe(self) -> None:
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...
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@abstractmethod
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async def get(self) -> rpc_pb2.Message:
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...
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class IPubsubRouter(ABC):
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@abstractmethod
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def get_protocols(self) -> List[TProtocol]:
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"""
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:return: the list of protocols supported by the router
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"""
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@abstractmethod
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def attach(self, pubsub: "Pubsub") -> None:
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"""
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Attach is invoked by the PubSub constructor to attach the router to a
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freshly initialized PubSub instance.
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:param pubsub: pubsub instance to attach to
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"""
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@abstractmethod
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def add_peer(self, peer_id: ID, protocol_id: TProtocol) -> None:
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"""
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Notifies the router that a new peer has been connected.
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:param peer_id: id of peer to add
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"""
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@abstractmethod
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def remove_peer(self, peer_id: ID) -> None:
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"""
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Notifies the router that a peer has been disconnected.
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:param peer_id: id of peer to remove
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"""
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@abstractmethod
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async def handle_rpc(self, rpc: rpc_pb2.RPC, sender_peer_id: ID) -> None:
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"""
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Invoked to process control messages in the RPC envelope.
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It is invoked after subscriptions and payload messages have been processed
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TODO: Check if this interface is ok. It's not the exact same as the go code, but the go
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code is really confusing with the msg origin, they specify `rpc.from` even when the rpc
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shouldn't have a from
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:param rpc: rpc message
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"""
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@abstractmethod
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async def publish(self, msg_forwarder: ID, pubsub_msg: rpc_pb2.Message) -> None:
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"""
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Invoked to forward a new message that has been validated.
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:param msg_forwarder: peer_id of message sender
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:param pubsub_msg: pubsub message to forward
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"""
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@abstractmethod
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async def join(self, topic: str) -> None:
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"""
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Join notifies the router that we want to receive and forward messages
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in a topic. It is invoked after the subscription announcement.
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:param topic: topic to join
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"""
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@abstractmethod
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async def leave(self, topic: str) -> None:
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"""
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Leave notifies the router that we are no longer interested in a topic.
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It is invoked after the unsubscription announcement.
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:param topic: topic to leave
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"""
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class IPubsub(ServiceAPI):
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@property
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@abstractmethod
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def my_id(self) -> ID:
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...
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@property
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@abstractmethod
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def protocols(self) -> Tuple[TProtocol, ...]:
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...
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@property
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@abstractmethod
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def topic_ids(self) -> KeysView[str]:
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...
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@abstractmethod
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def set_topic_validator(
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self, topic: str, validator: ValidatorFn, is_async_validator: bool
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) -> None:
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...
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@abstractmethod
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def remove_topic_validator(self, topic: str) -> None:
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...
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@abstractmethod
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async def wait_until_ready(self) -> None:
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...
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@abstractmethod
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async def subscribe(self, topic_id: str) -> ISubscriptionAPI:
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...
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@abstractmethod
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async def unsubscribe(self, topic_id: str) -> None:
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...
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@abstractmethod
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async def publish(self, topic_id: str, data: bytes) -> None:
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...
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