fixing backend dumping

backend/server/app.py

@@ -7,7 +7,7 @@ import uvicorn
 import os
 import json
 from datetime import datetime
-from kafka import KafkaProducer, KafkaAdminClient
+from kafka import KafkaProducer, KafkaAdminClient, KafkaConsumer
 from kafka.admin import NewTopic
 from kafka.errors import TopicAlreadyExistsError
 from dotenv import load_dotenv
@@ -22,7 +22,7 @@ def get_producer() -> KafkaProducer:
     global _producer
     if _producer is None:
         host = os.getenv('KAFKA_HOST', 'localhost')
-        port = os.getenv('KAFKA_PORT', '29092')  # use internal broker port
+        port = os.getenv('KAFKA_PORT', '9092')
         broker = f'{host}:{port}' if port else host
         print(f"[KAFKA_INIT] Connecting to broker: {broker}")
         _producer = KafkaProducer(
@@ -61,7 +61,7 @@ app.add_middleware(
 async def startup_event():
     """create kafka topics on startup"""
     host = os.getenv('KAFKA_HOST', 'localhost')
-    port = os.getenv('KAFKA_PORT', '29092')
+    port = os.getenv('KAFKA_PORT', '9092')
     broker = f'{host}:{port}'
 
     try:
@@ -125,10 +125,62 @@ async def ingest_logs(event: EventPayload):
         raise HTTPException(status_code=500, detail=str(e))
 
 @app.get("/api/kafka/dump")
-def dump_logs():
+def dump_logs(
-    # TODO: implement a dump of logs of time period t_start to t_end (params of get)
+    last_n: Optional[int] = None,
-    # OR: allow for params of last_n logs as a param - creating two modes of the dumping
+    t_start: Optional[str] = None,
-    pass
+    t_end: Optional[str] = None
+):
+    """dump all messages from user-interactions topic
+
+    params:
+        last_n: return only last n messages (default: all)
+        t_start: filter by start timestamp iso format (future use)
+        t_end: filter by end timestamp iso format (future use)
+    """
+    host = os.getenv('KAFKA_HOST', 'localhost')
+    port = os.getenv('KAFKA_PORT', '9092')
+    broker = f'{host}:{port}'
+
+    try:
+        consumer = KafkaConsumer(
+            'user-interactions',
+            bootstrap_servers=[broker],
+            auto_offset_reset='earliest',
+            enable_auto_commit=False,
+            value_deserializer=lambda x: json.loads(x.decode('utf-8')),
+            consumer_timeout_ms=5000
+        )
+
+        events = []
+        for msg in consumer:
+            events.append(msg.value)
+
+        consumer.close()
+
+        # apply filters
+        if t_start or t_end:
+            # filter by timestamp range if provided
+            filtered = []
+            for e in events:
+                ts = e.get('ts')
+                if ts:
+                    if t_start and ts < t_start:
+                        continue
+                    if t_end and ts > t_end:
+                        continue
+                filtered.append(e)
+            events = filtered
+
+        if last_n and last_n > 0:
+            events = events[-last_n:]
+
+        return {"success": True, "count": len(events), "data": events}
+
+    except Exception as e:
+        import traceback
+        print(f"[DUMP_ERROR] {e}")
+        print(traceback.format_exc())
+        raise HTTPException(status_code=500, detail=str(e))
 
 
 

experiments/procesing/extract.py

@@ -1,51 +1,28 @@
-from kafka import KafkaConsumer
 import pandas as pd
 import json
 import numpy as np
 import os
+import requests
 from dotenv import load_dotenv
 from sklearn.base import BaseEstimator, TransformerMixin
-# import matplotlib.pyplot as plt
-# from IPython.display import display, SVG, Image
 load_dotenv()
 
-
+BACKEND_URL = os.getenv("BACKEND_URL", "http://localhost:5000")
-KAFKA_HOST=os.getenv("KAFKA_HOST", "localhost")
-KAFKA_PORT=os.getenv("KAFKA_PORT", 9092)
-TOPIC = os.getenv("KAFKA_TOPIC", "user-interactions")
 N_PRICE_BUCKETS = 5
 
 def get_data_from_kafka() -> pd.DataFrame:
-    consumer = KafkaConsumer(
+    """fetch all events from backend dump endpoint"""
-        TOPIC,
+    resp = requests.get(f"{BACKEND_URL}/api/kafka/dump")
-        enable_auto_commit=True,
+    resp.raise_for_status()
-        value_deserializer=lambda x: json.loads(x.decode('utf-8')),
+    data = resp.json()
-        auto_offset_reset='earliest',
+
-        bootstrap_servers=[f"{KAFKA_HOST}:{KAFKA_PORT}"]
+    if not data.get('success') or not data.get('data'):
-    )
+        return pd.DataFrame()
-    messages=consumer.poll(timeout_ms=1000,max_records=10000)
+
-    df = []
+    df = pd.DataFrame(data['data'])
-    for m in messages.values():
-        for i in m:
-            df.append(i.value)
-    df = pd.DataFrame(df)
-    """
- 0   sessionId             73 non-null     object
- 1   eventName             73 non-null     object
- 2   page                  73 non-null     object
- 3   productId             67 non-null     object
- 4   storeMode             73 non-null     object
- 5   userAgent             73 non-null     object
- 6   ts                    73 non-null     object
- 7   metadata_referrer     6 non-null      object
- 8   metadata_roomType     45 non-null     object
- 9   metadata_price        45 non-null     float64
- 10  metadata_nights       45 non-null     float64
- 11  metadata_elementText  22 non-null     object
- 12  metadata_dwellTime    22 non-null     float64
-    """
     # explode metadata col json
-    df = df.join(pd.json_normalize(df.pop("metadata"), sep=".").add_prefix("metadata_"))
+    if 'metadata' in df.columns:
+        df = df.join(pd.json_normalize(df.pop("metadata"), sep=".").add_prefix("metadata_"))
     df = df.dropna(subset=['eventName'])
     return df
 
@@ -58,11 +35,22 @@ def join_with_experiments(df: pd.DataFrame) -> pd.DataFrame:
 def augment_event_titles(df: pd.DataFrame) -> pd.DataFrame:
     # from taking standard view_item_page in eventName to view_item_page_{metadata_schema}
     # we want metadata schema to create product specific event names
-    price_buckets = pd.qcut(
+
-        df["metadata_price"],
+    # only create price buckets if we have enough unique prices
-        q=N_PRICE_BUCKETS,
+    if df["metadata_price"].notnull().sum() > 0:
-        labels=[f"PB_{i+1}" for i in range(N_PRICE_BUCKETS)]
+        try:
-    )
+            price_buckets = pd.qcut(
+                df["metadata_price"],
+                q=N_PRICE_BUCKETS,
+                labels=[f"PB_{i+1}" for i in range(N_PRICE_BUCKETS)],
+                duplicates='drop'  # handle duplicate bin edges
+            )
+        except ValueError:
+            # fallback: if still not enough unique values, use cut with fixed ranges or just use raw price
+            price_buckets = df["metadata_price"].apply(lambda x: f"P_{int(x)}" if pd.notnull(x) else "")
+    else:
+        price_buckets = pd.Series([""] * len(df), index=df.index)
+
     # metadata_schema: _product_id@price_bucket_{i} only if we have product metadata otherswise keep original event name
     # TODO: make this adaptive, if we have hover_over_title we append the title, if its view_page we say which page
     df["metadata_schema"] = np.where(