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75 lines
2.1 KiB
Python
75 lines
2.1 KiB
Python
# adapted from https://medium.com/@jonathonbao/python3-logging-with-multiprocessing-f51f460b8778
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import logging
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import threading
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import os
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import signal
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import queue
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import multiprocessing as mp
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from logging import handlers
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def listener_configurer():
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root = logging.getLogger()
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console_handler = logging.StreamHandler()
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formatter = logging.Formatter('%(name)-30s %(levelname)-8s: %(message)s')
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console_handler.setFormatter(formatter)
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root.addHandler(console_handler)
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root.setLevel(logging.INFO)
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def root_configurer(queue):
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h = handlers.QueueHandler(queue)
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root = logging.getLogger()
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root.addHandler(h)
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root.setLevel(logging.INFO)
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def log_process(log_queue):
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stop_event = mp.Event()
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def receiveSignal(signalNumber, frame):
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stop_event.set()
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signal.signal(signal.SIGTERM, receiveSignal)
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signal.signal(signal.SIGINT, receiveSignal)
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threading.current_thread().name = f"logger"
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listener_configurer()
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while True:
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if stop_event.is_set() and log_queue.empty():
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break
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try:
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record = log_queue.get(timeout=5)
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except queue.Empty:
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continue
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logger = logging.getLogger(record.name)
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logger.handle(record)
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# based on https://codereview.stackexchange.com/a/17959
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class LogPipe(threading.Thread):
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def __init__(self, log_name, level):
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"""Setup the object with a logger and a loglevel
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and start the thread
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"""
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threading.Thread.__init__(self)
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self.daemon = False
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self.logger = logging.getLogger(log_name)
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self.level = level
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self.fdRead, self.fdWrite = os.pipe()
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self.pipeReader = os.fdopen(self.fdRead)
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self.start()
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def fileno(self):
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"""Return the write file descriptor of the pipe
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"""
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return self.fdWrite
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def run(self):
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"""Run the thread, logging everything.
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"""
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for line in iter(self.pipeReader.readline, ''):
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self.logger.log(self.level, line.strip('\n'))
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self.pipeReader.close()
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def close(self):
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"""Close the write end of the pipe.
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"""
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os.close(self.fdWrite) |