connect on demand

src/resources.py

@@ -8,7 +8,7 @@ from db import db
 from models import SampleMetadata
 from schemas import SampleSchema, SampleMetadataSchema
 from config import *
-from fpika import fpika
+import pika
 
 """
 Flask Restful endpoints
@@ -76,10 +76,20 @@ class SampleResource(Resource):
                         soundfile,
                         soundfile.content_type,
                         {'Content-Length': soundfile.content_length})}).raise_for_status()
-            ch = fpika.channel()
-            ch.basic_publish(exchange=RABBITMQ_EXCHANGE, routing_key='feature',
-                             body=json.dumps({'tag': generated_tag}).encode('UTF-8'))
-            fpika.return_channel(ch)
+            credentials = pika.PlainCredentials(current_app.config['FLASK_PIKA_PARAMS']['username'],
+                                                current_app.config['FLASK_PIKA_PARAMS']['password'])
+            connection = pika.BlockingConnection(
+                pika.ConnectionParameters(host=current_app.config['FLASK_PIKA_PARAMS']['host'],
+                                          credentials=credentials,
+                                          heartbeat=0,
+                                          socket_timeout=5))
+            channel = connection.channel()
+            channel.exchange_declare(exchange=current_app.config['FLASK_PIKA_PARAMS']['EXCHANGE_NAME'],
+                                     exchange_type='fanout')
+            channel.basic_publish(exchange=current_app.config['FLASK_PIKA_PARAMS']['EXCHANGE_NAME'],
+                                  routing_key='feature',
+                                  body=json.dumps({'tag': generated_tag}).encode('UTF-8'))
+            connection.close()
         except Exception as e:
             current_app.logger.exception(e)
             db.session.rollback()