make version of ts_mon compatible with appengine

appengine_module/gae_ts_mon/monitoring.py

+#!/usr/bin/env python
+# Copyright (c) 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Send system monitoring data to the timeseries monitoring API."""
+
+import logging
+import webapp2
+
+from common.metrics import *
+from common.http_metrics import (
+    access_count, durations, request_bytes, response_bytes, response_status)
+import config
+import interface
+
+from google.appengine.api import app_identity
+from google.appengine.api import modules
+
+import os
+import sys
+
+
+MONACQ_ENDPOINT = 'pubsub://chrome-infra-mon-pubsub/monacq'
+
+
+class InitializeMonitoringHandler(webapp2.RequestHandler):
+
+  def get(self):
+    service = app_identity.get_application_id()
+    version = modules.get_current_version_name()
+    instance_id = hash(modules.get_current_instance_id()) % 10
+    endpoint = MONACQ_ENDPOINT
+    config.initialize(job_name=version, instance=instance_id,
+                      service_name=service, endpoint=endpoint)
+    self.response.set_status(200, 'Initialized instance of ts_mon.')
+
+
+class MonitoringHandler(webapp2.RequestHandler):
+
+  ''' Called by cron jobs every 5 minutes to update metrics. '''
+  def get(self, key=None):
+    interface.flush()
+    logging.info('Metrics updated.')
+    return
+
+
+app = webapp2.WSGIApplication([
+    ('/_ah/start', InitializeMonitoringHandler),
+    ('/monitoring', MonitoringHandler),
+    ('/monitoring/(.*)', MonitoringHandler)
+], debug=True)