lightweight exception capturing, logging

[osm/RO.git] / lcm / osm_common / msgkafka.py

diff --git a/lcm/osm_common/msgkafka.py b/lcm/osm_common/msgkafka.py
index 7b294fc..90c9c7f 100644 (file)
--- a/lcm/osm_common/msgkafka.py
+++ b/lcm/osm_common/msgkafka.py
@@ -1,13 +1,16 @@
+import logging
+import asyncio
+import yaml
 from aiokafka import AIOKafkaConsumer
 from aiokafka import AIOKafkaProducer
 from aiokafka.errors import KafkaError
 from msgbase import MsgBase, MsgException
-import asyncio
-import yaml
 #import json
 
-class msgKafka(MsgBase):
-    def __init__(self):
+
+class MsgKafka(MsgBase):
+    def __init__(self, logger_name='msg'):
+        self.logger = logging.getLogger(logger_name)
         self.host = None
         self.port = None
         self.consumer = None
@@ -17,6 +20,8 @@ class msgKafka(MsgBase):
 
     def connect(self, config):
         try:
+            if "logger_name" in config:
+                self.logger = logging.getLogger(config["logger_name"])
             self.host = config["host"]
             self.port = config["port"]
             self.topic_lst = []
@@ -26,24 +31,25 @@ class msgKafka(MsgBase):
         except Exception as e:  # TODO refine
             raise MsgException(str(e))
 
-    def write(self, topic, msg, key):
-
+    def write(self, topic, key, msg):
         try:
-            self.loop.run_until_complete(self.aiowrite(key, msg=yaml.safe_dump(msg, default_flow_style=True), topic=topic))
+            self.loop.run_until_complete(self.aiowrite(topic=topic, key=key, msg=yaml.safe_dump(msg, default_flow_style=True)))
 
         except Exception as e:
             raise MsgException("Error writing {} topic: {}".format(topic, str(e)))
 
     def read(self, topic):
-        self.topic_lst.append(topic)
+        #self.topic_lst.append(topic)
         try:
-            return self.loop.run_until_complete(self.aioread(self.topic_lst))
+            return self.loop.run_until_complete(self.aioread(topic))
         except Exception as e:
             raise MsgException("Error reading {} topic: {}".format(topic, str(e)))
 
-    async def aiowrite(self, key, msg, topic):
+    async def aiowrite(self, topic, key, msg, loop=None):
         try:
-            self.producer = AIOKafkaProducer(loop=self.loop, key_serializer=str.encode, value_serializer=str.encode,
+            if not loop:
+                loop = self.loop
+            self.producer = AIOKafkaProducer(loop=loop, key_serializer=str.encode, value_serializer=str.encode,
                                              bootstrap_servers=self.broker)
             await self.producer.start()
             await self.producer.send(topic=topic, key=key, value=msg)
@@ -52,10 +58,12 @@ class msgKafka(MsgBase):
         finally:
             await self.producer.stop()
 
-    async def aioread(self, topic):
-        self.consumer = AIOKafkaConsumer(loop=self.loop, bootstrap_servers=self.broker)
+    async def aioread(self, topic, loop=None):
+        if not loop:
+            loop = self.loop
+        self.consumer = AIOKafkaConsumer(loop=loop, bootstrap_servers=self.broker)
         await self.consumer.start()
-        self.consumer.subscribe(topic)
+        self.consumer.subscribe([topic])
         try:
             async for message in self.consumer:
                 return yaml.load(message.key), yaml.load(message.value)