Extract webserver metrics into a separate class to avoid passing it into every API call. Change the display to requests per hour rather than just last request time. Add SSE and telnet client connected count.

webserver/handlers/api/alerts.py

@@ -10,7 +10,6 @@ from tornado import httputil
 from tornado.web import Application
 
 from core.enums import AlertType
-from core.prometheus_metrics_handler import api_requests_counter
 from core.utils import safe_json_dumps
 from data.lookup_credentials import extract_credentials
 
@@ -27,12 +26,10 @@ class APIAlertsHandler(tornado.web.RequestHandler):
         **kwargs: Any,
     ):
         self._alerts = None
-        self._web_server_metrics = None
         super().__init__(application, request, **kwargs)
 
-    def initialize(self, alerts, web_server_metrics):
+    def initialize(self, alerts):
         self._alerts = alerts
-        self._web_server_metrics = web_server_metrics
 
     @staticmethod
     def _enrich(alerts, credentials):
@@ -45,12 +42,6 @@ class APIAlertsHandler(tornado.web.RequestHandler):
 
     def get(self):
         try:
-            # Metrics
-            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self._web_server_metrics["api_access_counter"] += 1
-            self._web_server_metrics["status"] = "OK"
-            api_requests_counter.inc()
-
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
             query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
@@ -82,15 +73,13 @@ class APIAlertsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
 
     def __init__(self, application, request, **kwargs: Any):
         self._sse_alert_broadcaster = None
-        self._web_server_metrics = None
         self._query_params = None
         self._credentials = None
         self._fields = None
         super().__init__(application, request, **kwargs)
 
-    def initialize(self, sse_alert_broadcaster, web_server_metrics):
+    def initialize(self, sse_alert_broadcaster):
         self._sse_alert_broadcaster = sse_alert_broadcaster
-        self._web_server_metrics = web_server_metrics
 
     def custom_headers(self):
         """Custom headers to avoid e.g. nginx reverse proxy from buffering SSE data"""
@@ -99,12 +88,6 @@ class APIAlertsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
 
     def open(self):
         try:
-            # Metrics
-            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self._web_server_metrics["api_access_counter"] += 1
-            self._web_server_metrics["status"] = "OK"
-            api_requests_counter.inc()
-
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
             self._query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}