64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
from os import mkfifo, remove
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from os.path import exists, join
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from secrets import token_urlsafe
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from collections import namedtuple
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from abc import ABC, abstractmethod
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from .pipe_reader_thread import PipeReaderThread
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from .pipe_writer_thread import PipeWriterThread
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class PipeHandler:
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def __init__(self, *pipe_paths):
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self._pipe_paths = pipe_paths
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def recreate(self):
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self.remove()
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for pipe_path in self._pipe_paths:
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mkfifo(pipe_path)
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def remove(self):
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for pipe_path in self._pipe_paths:
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if exists(pipe_path):
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remove(pipe_path)
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class PipeIOServer(ABC):
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def __init__(self, in_pipe=None, out_pipe=None):
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self.in_pipe, self.out_pipe = in_pipe, out_pipe
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self._io_threads = None
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self._create_pipes()
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self._init_io_threads()
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def _create_pipes(self):
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if not self.in_pipe or not self.out_pipe:
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pipe_id = token_urlsafe(6)
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self.in_pipe = join('/tmp', f'in_pipe_{pipe_id}')
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self.out_pipe = join('/tmp', f'out_pipe_{pipe_id}')
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PipeHandler(self.in_pipe, self.out_pipe).recreate()
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def _init_io_threads(self):
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io_threads_dict = {
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'reader': PipeReaderThread(self.in_pipe, self.handle_message),
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'writer': PipeWriterThread(self.out_pipe)
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}
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IOThreadsTuple = namedtuple('IOThreadsTuple', sorted(io_threads_dict.keys()))
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self._io_threads = IOThreadsTuple(**io_threads_dict)
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@abstractmethod
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def handle_message(self, message):
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raise NotImplementedError()
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def send(self, message):
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self._io_threads.writer.write(message)
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def run(self):
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for thread in self._io_threads:
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thread.start()
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def stop(self):
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for thread in self._io_threads:
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if thread.isAlive():
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thread.stop()
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PipeHandler(self.in_pipe, self.out_pipe).remove()
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