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from __future__ import absolute_import
from kafka.common import TopicPartition
from kafka.protocol.struct import Struct
from kafka.protocol.types import Array, Bytes, Int16, Int32, Schema, String
class ConsumerProtocolMemberMetadata(Struct):
SCHEMA = Schema(
('version', Int16),
('subscription', Array(String('utf-8'))),
('user_data', Bytes))
class ConsumerProtocolMemberAssignment(Struct):
SCHEMA = Schema(
('version', Int16),
('assignment', Array(
('topic', String('utf-8')),
('partitions', Array(Int32)))),
('user_data', Bytes))
def partitions(self):
return [TopicPartition(topic, partition)
for topic, partitions in self.assignment # pylint: disable-msg=no-member
for partition in partitions]
class ConsumerProtocol(object):
PROTOCOL_TYPE = 'consumer'
ASSIGNMENT_STRATEGIES = ('range', 'roundrobin')
METADATA = ConsumerProtocolMemberMetadata
ASSIGNMENT = ConsumerProtocolMemberAssignment
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