xos/coreapi/apistats.py

# Copyright 2017-present Open Networking Foundation
#
# 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 prometheus_client import Counter, Histogram
import time

REQUEST_COUNT = Counter(
    'grpc_request_count', 'GRPC Request Count',
    ['app_name', 'model_name', 'endpoint', 'status']
)

# TODO (teone) add caller as label for the counter (eg: GUI, TOSCA, SYNCHRONIZER)
# TODO (teone) add user informations as label for the counter

REQUEST_LATENCY = Histogram(
    'grpc_request_latency_seconds', 'GRPC Request latency',
    ['app_name', 'model_name', 'endpoint']
)

def track_request_time(model, method):
    """
    This decorator register the request time of a request
    """

    def decorator(function):

        def wrapper(*args, **kwargs):

            start_time = time.time()
            res = function(*args, **kwargs)
            resp_time = time.time() - start_time
            REQUEST_LATENCY.labels('xos-core', model, method).observe(resp_time)
            return res

        return wrapper

    return decorator