from aiokafka.errors import KafkaError
from osm_common.msgbase import MsgBase, MsgException
-__author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>, " \
- "Guillermo Calvino <guillermo.calvinosanchez@altran.com>"
+__author__ = (
+ "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>, "
+ "Guillermo Calvino <guillermo.calvinosanchez@altran.com>"
+)
class MsgKafka(MsgBase):
- def __init__(self, logger_name='msg', lock=False):
+ def __init__(self, logger_name="msg", lock=False):
super().__init__(logger_name, lock)
self.host = None
self.port = None
:param msg: message content, can be string or dictionary
:return: None or raises MsgException on failing
"""
- retry = 2 # Try two times
+ retry = 2 # Try two times
while retry:
try:
- self.loop.run_until_complete(self.aiowrite(topic=topic, key=key, msg=msg))
+ self.loop.run_until_complete(
+ self.aiowrite(topic=topic, key=key, msg=msg)
+ )
break
except Exception as e:
retry -= 1
if retry == 0:
- raise MsgException("Error writing {} topic: {}".format(topic, str(e)))
+ raise MsgException(
+ "Error writing {} topic: {}".format(topic, str(e))
+ )
def read(self, topic):
"""
if not loop:
loop = self.loop
try:
- self.producer = AIOKafkaProducer(loop=loop, key_serializer=str.encode, value_serializer=str.encode,
- bootstrap_servers=self.broker)
+ 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=yaml.safe_dump(msg, default_flow_style=True))
+ await self.producer.send(
+ topic=topic, key=key, value=yaml.safe_dump(msg, default_flow_style=True)
+ )
except Exception as e:
- raise MsgException("Error publishing topic '{}', key '{}': {}".format(topic, key, e))
+ raise MsgException(
+ "Error publishing topic '{}', key '{}': {}".format(topic, key, e)
+ )
finally:
await self.producer.stop()
- async def aioread(self, topic, loop=None, callback=None, aiocallback=None, group_id=None, from_beginning=None,
- **kwargs):
+ async def aioread(
+ self,
+ topic,
+ loop=None,
+ callback=None,
+ aiocallback=None,
+ group_id=None,
+ from_beginning=None,
+ **kwargs
+ ):
"""
Asyncio read from one or several topics.
:param topic: can be str: single topic; or str list: several topics
topic_list = topic
else:
topic_list = (topic,)
- self.consumer = AIOKafkaConsumer(loop=loop, bootstrap_servers=self.broker, group_id=group_id,
- auto_offset_reset="earliest" if from_beginning else "latest")
+ self.consumer = AIOKafkaConsumer(
+ loop=loop,
+ bootstrap_servers=self.broker,
+ group_id=group_id,
+ auto_offset_reset="earliest" if from_beginning else "latest",
+ )
await self.consumer.start()
self.consumer.subscribe(topic_list)
async for message in self.consumer:
if callback:
- callback(message.topic, yaml.safe_load(message.key), yaml.safe_load(message.value), **kwargs)
+ callback(
+ message.topic,
+ yaml.safe_load(message.key),
+ yaml.safe_load(message.value),
+ **kwargs
+ )
elif aiocallback:
- await aiocallback(message.topic, yaml.safe_load(message.key), yaml.safe_load(message.value),
- **kwargs)
+ await aiocallback(
+ message.topic,
+ yaml.safe_load(message.key),
+ yaml.safe_load(message.value),
+ **kwargs
+ )
else:
- return message.topic, yaml.safe_load(message.key), yaml.safe_load(message.value)
+ return (
+ message.topic,
+ yaml.safe_load(message.key),
+ yaml.safe_load(message.value),
+ )
except KafkaError as e:
raise MsgException(str(e))
finally: