f3507452802b5cc0b63766cfa5d57e64c6b2b887
1 from aiokafka
import AIOKafkaConsumer
2 from aiokafka
import AIOKafkaProducer
3 from aiokafka
.errors
import KafkaError
4 from msgbase
import MsgBase
, MsgException
9 class MsgKafka(MsgBase
):
15 # create a different file for each topic
18 def connect(self
, config
):
20 self
.host
= config
["host"]
21 self
.port
= config
["port"]
23 self
.loop
= asyncio
.get_event_loop()
24 self
.broker
= str(self
.host
) + ":" + str(self
.port
)
26 except Exception as e
: # TODO refine
27 raise MsgException(str(e
))
29 def write(self
, topic
, key
, msg
):
31 self
.loop
.run_until_complete(self
.aiowrite(topic
=topic
, key
=key
, msg
=yaml
.safe_dump(msg
, default_flow_style
=True)))
33 except Exception as e
:
34 raise MsgException("Error writing {} topic: {}".format(topic
, str(e
)))
36 def read(self
, topic
):
37 #self.topic_lst.append(topic)
39 return self
.loop
.run_until_complete(self
.aioread(topic
))
40 except Exception as e
:
41 raise MsgException("Error reading {} topic: {}".format(topic
, str(e
)))
43 async def aiowrite(self
, topic
, key
, msg
, loop
=None):
47 self
.producer
= AIOKafkaProducer(loop
=loop
, key_serializer
=str.encode
, value_serializer
=str.encode
,
48 bootstrap_servers
=self
.broker
)
49 await self
.producer
.start()
50 await self
.producer
.send(topic
=topic
, key
=key
, value
=msg
)
51 except Exception as e
:
52 raise MsgException("Error publishing to {} topic: {}".format(topic
, str(e
)))
54 await self
.producer
.stop()
56 async def aioread(self
, topic
, loop
=None):
59 self
.consumer
= AIOKafkaConsumer(loop
=loop
, bootstrap_servers
=self
.broker
)
60 await self
.consumer
.start()
61 self
.consumer
.subscribe([topic
])
63 async for message
in self
.consumer
:
64 return yaml
.load(message
.key
), yaml
.load(message
.value
)
65 except KafkaError
as e
:
66 raise MsgException(str(e
))
68 await self
.consumer
.stop()