#!/usr/bin/env python3 import time 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 magic_doer import MagicDoer 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 recieved: {e}") channel.basic_ack(delivery_tag=method.delivery_tag) # We don't want this to be requeue return logging.debug(f"Handling message: {msg}") span_ctx = opentracing.tracer.extract(Format.TEXT_MAP, msg) span_tags = {tags.SPAN_KIND: tags.SPAN_KIND_CONSUMER} with opentracing.tracer.start_active_span( 'main.handleMessage', finish_on_close=True, child_of=span_ctx, tags=span_tags ) as scope: with opentracing.tracer.start_active_span('magicDoer.runEverything'): try: results = MagicDoer.run_everything(msg) # <- This is where the magic happens except Exception as e: logging.error(f"Something went wrong during handling sample {msg['tag']} run: {e}; msg: {msg}") logging.exception(e) channel.basic_nack(delivery_tag=method.delivery_tag, requeue=True) return if results: opentracing.tracer.inject(scope.span.context, Format.TEXT_MAP, results) logging.debug(f"Publishing message: {results}") channel.basic_publish( exchange=Config.PIKA_OUTPUT_EXCHANGE, routing_key='classification-result', body=json.dumps(results).encode("utf-8") ) channel.basic_ack(delivery_tag=method.delivery_tag) def main(): # 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='cnn-classification-service', validate=True).initialize_tracer() # Start the memes logging.info("Connecting to MQ service...") connection = pika.BlockingConnection(pika.connection.URLParameters(Config.PIKA_URL)) channel = connection.channel() channel.exchange_declare(exchange=Config.PIKA_INPUT_EXCHANGE, exchange_type='direct') queue_declare_result = channel.queue_declare(queue='cnnqueue', exclusive=False) queue_name = queue_declare_result.method.queue channel.queue_bind(exchange=Config.PIKA_INPUT_EXCHANGE, routing_key='feature', queue=queue_name) channel.basic_qos(prefetch_count=1) channel.basic_consume(queue=queue_name, on_message_callback=message_callback, 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__': main()