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# ============LICENSE_START========================================== 
# org.onap.vvp/test-engine
# ===================================================================
# Copyright © 2017 AT&T Intellectual Property. All rights reserved.
# ===================================================================
#
# Unless otherwise specified, all software contained herein is licensed
# under the Apache License, Version 2.0 (the “License”);
# you may not use this software 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.
#
#
#
# Unless otherwise specified, all documentation contained herein is licensed
# under the Creative Commons License, Attribution 4.0 Intl. (the “License”);
# you may not use this documentation except in compliance with the License.
# You may obtain a copy of the License at
#
#             https://creativecommons.org/licenses/by/4.0/
#
# Unless required by applicable law or agreed to in writing, documentation
# 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.
#
# ============LICENSE_END============================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
from services.logging_service import LoggingServiceFactory
logger = LoggingServiceFactory.get_logger()

def _aop(decorator):
    '''This decorator can be used to turn simple functions
    into well-behaved decorators, so long as the decorators
    are fairly simple. If a decorator expects a function and
    returns a function (no descriptors), and if it doesn't
    modify function attributes or docstring, then it is
    eligible to use this. Simply apply @_aop to
    your decorator and it will automatically preserve the
    docstring and function attributes of functions to which
    it is applied.'''
    def new_decorator(f):
        g = decorator(f)
        g.__name__ = f.__name__
        g.__doc__ = f.__doc__
        g.__dict__.update(f.__dict__)
        return g
    
    # Now a few lines needed to make _aop itself
    # be a well-behaved decorator.
    new_decorator.__name__ = decorator.__name__
    new_decorator.__doc__ = decorator.__doc__
    new_decorator.__dict__.update(decorator.__dict__)
    return new_decorator

#
# Sample Use:
#
@_aop
def logFuncEntry(func):
    def foo(*args, **kwargs):
        logger.debug('calling {}'.format(func.__name__)+" | "+str(args)+" | "+str(kwargs))
        return func(*args, **kwargs)
    return foo