68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
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from time import time, sleep
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from typing import List
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from biopro.message.request import DataMessageHandler
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from biopro.util.console import BLUE
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from .controller import ControlServerAPI
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from .socket import ServerThread, ServerThreadClosedInterrupt
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class DataStreamThread(ServerThread):
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def __init__(self, server: ControlServerAPI):
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super().__init__('DataStream', BLUE)
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self._server = server
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self._handle: List[DataMessageHandler] = []
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def add_handle(self, handle: DataMessageHandler):
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try:
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self._handle.index(handle)
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except ValueError:
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self.log_verbose('add_handle', handle)
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self._handle.append(handle)
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def del_handle(self, handle: DataMessageHandler):
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try:
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self._handle.remove(handle)
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self.log_verbose('del_handle', handle)
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except ValueError:
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pass
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def has_handle(self) -> bool:
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return len(self._handle) > 0
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def shutdown(self) -> None:
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self._handle.clear()
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super().shutdown()
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def routine(self, event = None) -> None:
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t = time()
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if len(self._handle) == 0:
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event.wait(1)
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else:
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self._routine()
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sleep_time = 1 - (time() - t)
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if t > 0 and sleep_time > 0:
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event.wait(sleep_time)
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def _routine(self):
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for h in list(self._handle):
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if self.is_closed:
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raise ServerThreadClosedInterrupt()
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self._routine_handle(h)
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def _routine_handle(self, handle: DataMessageHandler):
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try:
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self._server.websocket_data_request(handle, None)
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except:
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# in general, error cause by data message building will caught by try-except in websocket_data_request
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# but if error cause from handler, such as disconnected, error will be raised to here,
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# and we cannot rescue it, just remote this handle.
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self.del_handle(handle)
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