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https://github.com/avatao-content/baseimage-tutorial-framework
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58 lines
2.0 KiB
Python
58 lines
2.0 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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import logging
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from os.path import dirname
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from watchdog.events import PatternMatchingEventHandler as PatternMatchingWatchdogEventHandler
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from tfw.networking.event_handlers.server_connector import ServerUplinkConnector
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from tfw.decorators.rate_limiter import RateLimiter
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from tfw.mixins.observer_mixin import ObserverMixin
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from tfw.mixins.supervisor_mixin import SupervisorLogMixin
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class LogMonitor(ObserverMixin):
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def __init__(self, process_name, log_tail=0):
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self.prevent_log_recursion()
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event_handler = SendLogWatchdogEventHandler(
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process_name,
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log_tail=log_tail
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)
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self.observer.schedule(
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event_handler,
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event_handler.path
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)
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@staticmethod
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def prevent_log_recursion():
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# This is done to prevent inotify event logs triggering themselves (infinite log recursion)
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logging.getLogger('watchdog.observers.inotify_buffer').propagate = False
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class SendLogWatchdogEventHandler(PatternMatchingWatchdogEventHandler, SupervisorLogMixin):
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def __init__(self, process_name, log_tail=0):
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self.process_name = process_name
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self.procinfo = self.supervisor.getProcessInfo(self.process_name)
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super().__init__([
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self.procinfo['stdout_logfile'],
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self.procinfo['stderr_logfile']
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])
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self.uplink = ServerUplinkConnector()
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self.log_tail = log_tail
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@property
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def path(self):
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return dirname(self.procinfo['stdout_logfile'])
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@RateLimiter(rate_per_second=5)
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def on_modified(self, event):
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self.uplink.send({
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'key': 'processlog',
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'data': {
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'command': 'new_log',
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'stdout': self.read_stdout(self.process_name, tail=self.log_tail),
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'stderr': self.read_stderr(self.process_name, tail=self.log_tail)
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}
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})
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