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27 lines
906 B
27 lines
906 B
from __future__ import absolute_import
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class Partitioner(object):
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"""
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Base class for a partitioner
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"""
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def __init__(self, partitions=None):
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"""
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Initialize the partitioner
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Arguments:
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partitions: A list of available partitions (during startup) OPTIONAL.
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"""
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self.partitions = partitions
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def __call__(self, key, all_partitions=None, available_partitions=None):
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"""
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Takes a string key, num_partitions and available_partitions as argument and returns
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a partition to be used for the message
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Arguments:
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key: the key to use for partitioning.
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all_partitions: a list of the topic's partitions.
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available_partitions: a list of the broker's currently avaliable partitions(optional).
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"""
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raise NotImplementedError('partition function has to be implemented')
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