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log_interop_twisted.py
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log_interop_twisted.py
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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Crossbar.io Technologies GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
import sys
import txaio
txaio.use_twisted()
from twisted import logger
from twisted.logger import ILogObserver
from zope.interface import provider
# some library you use is using txaio logging stuff
class Library(object):
log = txaio.make_logger()
def something(self):
self.log.info("info log from library foo={foo}", foo='bar')
self.log.debug("debug information")
# lets say you start your own observer
@provider(ILogObserver)
class Observer(object):
def __init__(self):
self._out = sys.stdout
def __call__(self, event):
self._out.write("Observe: {}\n".format(event))
lib = Library()
print("logging not started")
logger.globalLogBeginner.beginLoggingTo([Observer()])
print("logging started; calling library")
lib.something()
print("finished library call")
# should see "Observe: " ...