Did the needful

storage_service_feeder/main.py

@@ -1,5 +1,119 @@
+#!/usr/bin/env python3
+import time
+import uuid
+import jaeger_client
+import opentracing
+from opentracing.ext import tags
+from opentracing.propagation import Format
+
+import logging
+import sys
+import pika
+import json
+
+from sentry_sdk.integrations.logging import LoggingIntegration
+import sentry_sdk
+
+from config import Config
+
+from feeder import Feeder
+
+
+def message_callback_factory(feeder: Feeder):
+    def message_callback(channel, method, properties, body):
+        try:
+            msg = json.loads(body.decode('utf-8'))
+        except (UnicodeDecodeError, json.JSONDecodeError) as e:
+            logging.warning(f"Invalid message received: {e}")
+            channel.basic_ack(delivery_tag=method.delivery_tag)  # We don't want this to be requeue
+            return
+
+        logging.debug(f"Handling message: {msg}")
+
+        if 'tag' not in msg:
+            logging.warning(f"Invalid message received: No tag field")
+            channel.basic_ack(delivery_tag=method.delivery_tag)  # We don't want this to be requeue
+            return
+        tag = msg['tag']
+        mime_type = msg.get('mime_type', 'audio/wave')
+
+        span_ctx = opentracing.tracer.extract(Format.TEXT_MAP, msg)
+        span_tags = {
+            tags.SPAN_KIND: tags.SPAN_KIND_CONSUMER,
+            'sample_tag': tag
+        }
+
+        with opentracing.tracer.start_active_span(
+                'main.handleMessage', finish_on_close=True, child_of=span_ctx, tags=span_tags
+        ) as scope:
+            try:
+                feeder.do_feed(tag, mime_type)
+            except Exception as e:
+                logging.error(f"Something went wrong during handling sample {tag} run: {e}; msg: {msg}")
+                logging.exception(e)
+                channel.basic_nack(delivery_tag=method.delivery_tag, requeue=True)
+            else:
+                # successful
+                channel.basic_ack(delivery_tag=method.delivery_tag)
+
+    return message_callback
+
+
 def main():
-    pass
+    # setup logging
+
+    logging.basicConfig(
+        stream=sys.stdout,
+        format="%(asctime)s - %(name)s [%(levelname)s]: %(message)s",
+        level=Config.LOG_LEVEL
+    )
+
+    # setup observability stuffs
+
+    if Config.SENTRY_DSN:
+        sentry_logging = LoggingIntegration(
+            level=logging.DEBUG,  # Capture info and above as breadcrumbs
+            event_level=logging.ERROR  # Send errors as events
+        )
+        sentry_sdk.init(
+            dsn=Config.SENTRY_DSN,
+            integrations=[sentry_logging],
+            traces_sample_rate=1.0,
+            send_default_pii=True,
+            release=Config.RELEASE_ID,
+            environment=Config.RELEASEMODE,
+            _experiments={"auto_enabling_integrations": True}
+        )
+
+    jaeger_client.Config(config={}, service_name='storage-service-feeder', validate=True).initialize_tracer()
+
+    # Start the memes
+    logging.info("Preparing feeder...")
+    feeder = Feeder()
+
+    logging.info("Connecting to MQ service...")
+    connection = pika.BlockingConnection(pika.connection.URLParameters(Config.PIKA_URL))
+    channel = connection.channel()
+    channel.exchange_declare(exchange=Config.PIKA_SAMPLE_CACHE_EXCHANGE, exchange_type='direct')
+
+    queue_declare_result = channel.queue_declare(queue=str(uuid.uuid4()), exclusive=False)
+    queue_name = queue_declare_result.method.queue
+
+    channel.queue_bind(exchange=Config.PIKA_SAMPLE_CACHE_EXCHANGE, queue=queue_name)
+
+    channel.basic_qos(prefetch_count=1)
+
+    channel.basic_consume(queue=queue_name, on_message_callback=message_callback_factory(feeder), auto_ack=False)
+
+    logging.info("Connection complete! Listening to messages...")
+    try:
+        channel.start_consuming()
+    except KeyboardInterrupt:
+        logging.info("SIGINT Received! Stopping stuff...")
+        channel.stop_consuming()
+
+    time.sleep(2)  # lol
+    opentracing.tracer.close()
 
 
 if __name__ == '__main__':