osm_mon/collector/collector.py

   1 # -*- coding: utf-8 -*-
   2
   3 # Copyright 2018 Whitestack, LLC
   4 # *************************************************************
   5
   6 # This file is part of OSM Monitoring module
   7 # All Rights Reserved to Whitestack, LLC
   8
   9 # Licensed under the Apache License, Version 2.0 (the "License"); you may
  10 # not use this file except in compliance with the License. You may obtain
  11 # a copy of the License at
  12
  13 #         http://www.apache.org/licenses/LICENSE-2.0
  14
  15 # Unless required by applicable law or agreed to in writing, software
  16 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  17 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  18 # License for the specific language governing permissions and limitations
  19 # under the License.
  20 # For those usages not covered by the Apache License, Version 2.0 please
  21 # contact: bdiaz@whitestack.com or glavado@whitestack.com
  22 ##
  23 import logging
  24 import time
  25
  26 import peewee
  27
  28 from osm_mon.collector.backends.prometheus import PrometheusBackend
  29 from osm_mon.collector.service import CollectorService
  30 from osm_mon.core.config import Config
  31
  32 log = logging.getLogger(__name__)
  33
  34 METRIC_BACKENDS = [
  35     PrometheusBackend
  36 ]
  37
  38
  39 class Collector:
  40     def __init__(self, config: Config):
  41         self.conf = config
  42         self.service = CollectorService(config)
  43         self.backends = []
  44         self._init_backends()
  45
  46     def collect_forever(self):
  47         log.debug('collect_forever')
  48         while True:
  49             try:
  50                 self.collect_metrics()
  51                 time.sleep(int(self.conf.get('collector', 'interval')))
  52             except peewee.PeeweeException:
  53                 log.exception("Database error consuming message: ")
  54                 raise
  55             except Exception:
  56                 log.exception("Error collecting metrics")
  57
  58     def collect_metrics(self):
  59         metrics = self.service.collect_metrics()
  60         for backend in self.backends:
  61             backend.handle(metrics)
  62
  63     def _init_backends(self):
  64         for backend in METRIC_BACKENDS:
  65             self.backends.append(backend())