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Filename : profiling.py
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##
# Copyright (c) 2014-2017 Apple Inc. All rights reserved.
#
# 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 twisted.internet.defer import inlineCallbacks, returnValue
import cProfile as profile
import pstats


def profile_method():
    """
    Decorator to profile a function
    """

    def wrapper(method):
        def inner(*args, **kwargs):
            prof = profile.Profile()
            prof.enable()
            result = method(*args, **kwargs)
            prof.disable()

            stats = pstats.Stats(prof)
            stats.sort_stats('cumulative').print_stats()

            return result
        return inner
    return wrapper


def profile_inline_callback():
    """
    Decorator to profile an inlineCallback function
    """

    def wrapper(method):
        @inlineCallbacks
        def inner(*args, **kwargs):
            prof = profile.Profile()
            prof.enable()
            result = yield method(*args, **kwargs)
            prof.disable()

            stats = pstats.Stats(prof)
            stats.sort_stats('cumulative').print_stats()

            returnValue(result)
        return inner
    return wrapper