Implement web server metrics in Tornado #3

server/handlers/pagetemplate.py

@@ -1,14 +1,26 @@
+from datetime import datetime
+
+import pytz
 import tornado
 
 from core.config import ALLOW_SPOTTING
 from core.constants import SOFTWARE_VERSION
+from core.prometheus_metrics_handler import page_requests_counter
 
 
 # Handler for all HTML pages generated from templates
 class PageTemplateHandler(tornado.web.RequestHandler):
-    def initialize(self, template_name):
+    def initialize(self, template_name, web_server_metrics):
         self.template_name = template_name
+        self.web_server_metrics = web_server_metrics
 
     def get(self):
+        # Metrics
+        self.web_server_metrics["last_page_access_time"] = datetime.now(pytz.UTC)
+        self.web_server_metrics["page_access_counter"] += 1
+        self.web_server_metrics["status"] = "OK"
+        page_requests_counter.inc()
+
         # Load named template, and provide variables used in templates
         self.render(self.template_name + ".html", software_version=SOFTWARE_VERSION, allow_spotting=ALLOW_SPOTTING)
+