Exchanges are magic

src/config.py

@@ -19,7 +19,8 @@ class Config:
     RELEASE_ID = os.environ.get("RELEASE_ID", "test")
     RELEASEMODE = os.environ.get("INPUT_SERVICE_RELEASEMODE", "dev")
 
-    EXCHANGE_NAME = os.getenv("INPUT_RABBITMQ_EXCHANGE", "dev")
+    EXCHANGE_NAME_META = os.getenv("INPUT_RABBITMQ_EXCHANGE_META", "sample-meta")
+    EXCHANGE_NAME_CACHE = os.getenv("INPUT_RABBITMQ_EXCHANGE_CACHE", "sample-cache")
 
     FLASK_PIKA_PARAMS = {
         'host': os.getenv("INPUT_RABBITMQ_HOSTNAME", "localhost"),

src/magic_amqp.py

@@ -26,7 +26,8 @@ class MagicAMQP:
     def init_app(self, app: Flask):
         self.app = app
         self.app.config.setdefault('FLASK_PIKA_PARAMS', {})
-        self.app.config.setdefault('EXCHANGE_NAME', None)
+        self.app.config.setdefault('EXCHANGE_NAME_META', None)
+        self.app.config.setdefault('EXCHANGE_NAME_CACHE', None)
 
         self._credentials = pika.PlainCredentials(
             app.config['FLASK_PIKA_PARAMS']['username'],
@@ -45,7 +46,11 @@ class MagicAMQP:
         )
         self._pika_channel = self._pika_connection.channel()
         self._pika_channel.exchange_declare(
-            exchange=self.app.config['EXCHANGE_NAME'],
+            exchange=self.app.config['EXCHANGE_NAME_META'],
+            exchange_type='direct'
+        )
+        self._pika_channel.exchange_declare(
+            exchange=self.app.config['EXCHANGE_NAME_CACHE'],
             exchange_type='direct'
         )
 
@@ -70,7 +75,7 @@ class MagicAMQP:
             if total_time > 1:
                 self.app.logger.warning(f"Loop: Total loop took {total_time:5f} sec")
 
-    def publish(self, payload=None):
+    def _publish(self, exchange: str, payload=None):
         """
         Publish a simple json serialized message to the configured queue.
         If the connection is broken, then this call will block until the connection is restored
@@ -88,7 +93,7 @@ class MagicAMQP:
                 while True:
                     try:
                         self._pika_channel.basic_publish(
-                            exchange=self.app.config['EXCHANGE_NAME'],
+                            exchange=exchange,
                             routing_key='feature',
                             body=json.dumps(payload).encode('UTF-8')
                         )
@@ -119,6 +124,12 @@ class MagicAMQP:
                 if total_time > 0.4:
                     self.app.logger.warning(f"Publish: Total publish took {total_time:5f} sec")
 
+    def publish_cache(self, payload=None):
+        return self._publish(self.app.config['EXCHANGE_NAME_CACHE'], payload)
+
+    def publish_meta(self, payload=None):
+        return self._publish(self.app.config['EXCHANGE_NAME_META'], payload)
+
     def is_healthy(self) -> bool:
         with self._lock:
             if not self._pika_channel:

src/resources.py

@@ -62,8 +62,8 @@ class SampleResource(Resource):
                     break
 
         with opentracing.tracer.start_active_span('publishMetaMessage'):
-            try:  # TODO change exchange
+            try:
-                magic_amqp.publish(
+                magic_amqp.publish_meta(
                     {
                         'tag': generated_tag,
                         'timestamp': datetime.now().isoformat(),
@@ -84,8 +84,11 @@ class SampleResource(Resource):
 
         # Announce only after the data is successfully committed
         with opentracing.tracer.start_active_span('publishInCacheMessage'):
-            try:  # TODO change exchange
+            try:
-                magic_amqp.publish({'tag': generated_tag})
+                magic_amqp.publish_cache({
+                    'tag': generated_tag,
+                    'mime_type': soundfile.mimetype
+                })
             except Exception as e:
                 current_app.logger.exception(e)
                 return abort(500, f"AMQP Publish error: {str(e)}")