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# -*- coding: utf-8 -*-
# Copyright 2014 matrix.org
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from inspect import getcallargs
import logging
def log_function(f):
""" Function decorator that logs every call to that function.
"""
func_name = f.__name__
lineno = f.func_code.co_firstlineno
pathname = f.func_code.co_filename
def wrapped(*args, **kwargs):
name = f.__module__
logger = logging.getLogger(name)
level = logging.DEBUG
if logger.isEnabledFor(level):
bound_args = getcallargs(f, *args, **kwargs)
def format(value):
r = str(value)
if len(r) > 50:
r = r[:50] + "..."
return r
func_args = [
"%s=%s" % (k, format(v)) for k, v in bound_args.items()
]
msg_args = {
"func_name": func_name,
"args": ", ".join(func_args)
}
record = logging.LogRecord(
name=name,
level=level,
pathname=pathname,
lineno=lineno,
msg="Invoked '%(func_name)s' with args: %(args)s",
args=msg_args,
exc_info=None
)
logger.handle(record)
return f(*args, **kwargs)
return wrapped
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