Added slow span based on region

Added a randomly assigned region tag to the spans in get_product_list and then chose one (San Francisco) to become 5 sec long if the scenario is triggered

src/flagd/demo.flagd.json

@@ -28,6 +28,15 @@
       },
       "defaultVariant": "off"
     },
+    "slowRecommendationRegionSpan": {
+      "description": "Create a slow 5sec span in the recommendation service (get_product_list) for the San Francisco region",
+      "state": "ENABLED",
+      "variants": {
+        "on": true,
+        "off": false
+      },
+      "defaultVariant": "on"
+    },
     "adManualGc": {
       "description": "Triggers full manual garbage collections in the ad service",
       "state": "ENABLED",

src/recommendation/recommendation_server.py

@@ -67,11 +67,19 @@ def Watch(self, request, context):
 
 
 def get_product_list(request_product_ids):
+
+    #regions to randomly assign
+    regions = ["San Francisco", "New York", "London", "Frankfurt", "Mumbai", "Tokyo", "Singapore", "Sydney"]
+
     global first_run
     global cached_ids
     with tracer.start_as_current_span("get_product_list") as span:
         max_responses = 5
 
+        #Randomly assign a region tag value
+        rand_region = regions[random.randint(0, len(regions) - 1)]
+        span.set_attribute("app.recommendation.region", rand_region)
+
         # Formulate the list of characters to list of strings
         request_product_ids_str = ''.join(request_product_ids)
         request_product_ids = request_product_ids_str.split(',')
@@ -84,6 +92,14 @@ def get_product_list(request_product_ids):
         else:
             span.set_attribute("app.recommendation.slow_span_enabled", False)
 
+        #Feature flag Scenario - Slow Region Span
+        if check_feature_flag("slowRecommendationRegionSpan") and rand_region == "San Francisco":
+            time.sleep(5)
+            logger.info("get_product_list: slow region span enabled")
+            span.set_attribute("app.recommendation.slow_region_span_enabled", True)
+        else:
+            span.set_attribute("app.recommendation.slow_region_span_enabled", False)
+
         # Feature flag scenario - Cache Leak
         if check_feature_flag("recommendationCacheFailure"):
             span.set_attribute("app.recommendation.cache_enabled", True)