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Module liteyuki.comm.channel ​

本模块定义了一个通用的通道类，用于进程间通信

var SYNC_ON_RECEIVE_FUNC ​

  • Description: 同步接收函数

  • Type: TypeAlias

  • Default: Callable[[T], Any]

var ON_RECEIVE_FUNC ​

  • Description: 接收函数

  • Type: TypeAlias

  • Default: SYNC_ON_RECEIVE_FUNC | ASYNC_ON_RECEIVE_FUNC

var SYNC_FILTER_FUNC ​

  • Description: 同步过滤函数

  • Type: TypeAlias

  • Default: Callable[[T], bool]

var ASYNC_FILTER_FUNC ​

  • Description: 异步过滤函数

  • Type: TypeAlias

  • Default: Callable[[T], Coroutine[Any, Any, bool]]

var FILTER_FUNC ​

  • Description: 过滤函数

  • Type: TypeAlias

  • Default: SYNC_FILTER_FUNC | ASYNC_FILTER_FUNC

class Channel(Generic[T]) ​

func __init__(self, name: str, type_check: Optional[bool] = None) ​

Description: 初始化通道

Arguments:

  • name: 通道ID
  • type_check: 是否开启类型检查, 若为空，则传入泛型默认开启，否则默认关闭
Source code or View on GitHub
python
def __init__(self, name: str, type_check: Optional[bool]=None):
    self.conn_send, self.conn_recv = Pipe()
    self._conn_send_inner, self._conn_recv_inner = Pipe()
    self._closed = False
    self._on_main_receive_func_ids: list[int] = []
    self._on_sub_receive_func_ids: list[int] = []
    self.name: str = name
    self.is_receive_loop_running = False
    if type_check is None:
        type_check = self._get_generic_type() is not None
    elif type_check:
        if self._get_generic_type() is None:
            raise TypeError('Type hint is required for enforcing type check.')
    self.type_check = type_check
    if name in _channel:
        raise ValueError(f'Channel {name} already exists')
    if IS_MAIN_PROCESS:
        if name in _channel:
            raise ValueError(f'Channel {name} already exists')
        _channel[name] = self

func send(self, data: T) ​

Description: 发送数据，发送函数为同步函数，没有异步的必要

Arguments:

  • data (T): 数据
Source code or View on GitHub
python
def send(self, data: T):
    if self.type_check:
        _type = self._get_generic_type()
        if _type is not None and (not self._validate_structure(data, _type)):
            raise TypeError(f'Data must be an instance of {_type}, {type(data)} found')
    if self._closed:
        raise RuntimeError('Cannot send to a closed channel')
    self.conn_send.send(data)

func receive(self) -> T ​

Description: 同步接收数据，会阻塞线程

Return: T: 数据

Source code or View on GitHub
python
def receive(self) -> T:
    if self._closed:
        raise RuntimeError('Cannot receive from a closed channel')
    while True:
        data = self.conn_recv.recv()
        return data

async func async_receive(self) -> T ​

Description: 异步接收数据，会挂起等待

Return: T: 数据

Source code or View on GitHub
python
async def async_receive(self) -> T:
    loop = asyncio.get_running_loop()
    data = await loop.run_in_executor(None, self.receive)
    return data

func on_receive(self, filter_func: Optional[FILTER_FUNC] = None) -> Callable[[Callable[[T], Any]], Callable[[T], Any]] ​

Description: 接收数据并执行函数

Arguments:

Return: Callable[[Callable[[T], Any]], Callable[[T], Any]]: 装饰器

Source code or View on GitHub
python
def on_receive(self, filter_func: Optional[FILTER_FUNC]=None) -> Callable[[Callable[[T], Any]], Callable[[T], Any]]:
    if not IS_MAIN_PROCESS:
        raise RuntimeError('on_receive can only be used in main process')

    def decorator(func: Callable[[T], Any]) -> Callable[[T], Any]:
        global _func_id

        async def wrapper(data: T) -> Any:
            if filter_func is not None:
                if is_coroutine_callable(filter_func):
                    if not await filter_func(data):
                        return
                elif not filter_func(data):
                    return
            if is_coroutine_callable(func):
                return await func(data)
            else:
                return func(data)
        _callback_funcs[_func_id] = wrapper
        if IS_MAIN_PROCESS:
            self._on_main_receive_func_ids.append(_func_id)
        else:
            self._on_sub_receive_func_ids.append(_func_id)
        _func_id += 1
        return func
    return decorator

var active_channel ​

  • Description: 子进程可用的主动和被动通道

  • Type: Channel

  • Default: Channel(name='active_channel')

var passive_channel ​

  • Description: 被动通道

  • Type: Channel

  • Default: Channel(name='passive_channel')

var channel_deliver_active_channel ​

  • Description: 通道传递通道，主进程创建单例，子进程初始化时实例化

  • Type: Channel[Channel[Any]]

  • Default: NO_DEFAULT

var channel_deliver_passive_channel ​

  • Description: 被动通道传递通道

  • Type: Channel[tuple[str, dict[str, Any]]]

  • Default: NO_DEFAULT

func set_channel(name: str, channel: Channel) ​

Description: 设置通道实例

Arguments:

  • name (str): 通道名称
  • channel (Channel): 通道实例
Source code or View on GitHub
python
def set_channel(name: str, channel: 'Channel'):
    if not isinstance(channel, Channel):
        raise TypeError(f'channel_ must be an instance of Channel, {type(channel)} found')
    if IS_MAIN_PROCESS:
        if name in _channel:
            raise ValueError(f'Channel {name} already exists')
        _channel[name] = channel
    else:
        channel_deliver_passive_channel.send(('set_channel', {'name': name, 'channel_': channel}))

func set_channels(channels: dict[str, Channel]) ​

Description: 设置通道实例

Arguments:

Source code or View on GitHub
python
def set_channels(channels: dict[str, 'Channel']):
    for name, channel in channels.items():
        set_channel(name, channel)

func get_channel(name: str) -> Channel ​

Description: 获取通道实例

Arguments:

  • name (str): 通道名称

Return: Channel: 通道实例

Source code or View on GitHub
python
def get_channel(name: str) -> 'Channel':
    if IS_MAIN_PROCESS:
        return _channel[name]
    else:
        recv_chan = Channel[Channel[Any]]('recv_chan')
        channel_deliver_passive_channel.send(('get_channel', {'name': name, 'recv_chan': recv_chan}))
        return recv_chan.receive()

func get_channels() -> dict[str, Channel] ​

Description: 获取通道实例们

Return: dict[str, Channel]: 通道实例

Source code or View on GitHub
python
def get_channels() -> dict[str, 'Channel']:
    if IS_MAIN_PROCESS:
        return _channel
    else:
        recv_chan = Channel[dict[str, Channel[Any]]]('recv_chan')
        channel_deliver_passive_channel.send(('get_channels', {'recv_chan': recv_chan}))
        return recv_chan.receive()

@channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'set_channel')

func on_set_channel(data: tuple[str, dict[str, Any]]) ​

Source code or View on GitHub
python
@channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'set_channel')
def on_set_channel(data: tuple[str, dict[str, Any]]):
    name, channel = (data[1]['name'], data[1]['channel_'])
    set_channel(name, channel)

@channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'get_channel')

func on_get_channel(data: tuple[str, dict[str, Any]]) ​

Source code or View on GitHub
python
@channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'get_channel')
def on_get_channel(data: tuple[str, dict[str, Any]]):
    name, recv_chan = (data[1]['name'], data[1]['recv_chan'])
    recv_chan.send(get_channel(name))

@channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'get_channels')

func on_get_channels(data: tuple[str, dict[str, Any]]) ​

Source code or View on GitHub
python
@channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'get_channels')
def on_get_channels(data: tuple[str, dict[str, Any]]):
    recv_chan = data[1]['recv_chan']
    recv_chan.send(get_channels())

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