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from __future__ import absolute_import
import abc
class AbstractMetricsReporter(object):
"""
An abstract class to allow things to listen as new metrics
are created so they can be reported.
"""
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def init(self, metrics):
"""
This is called when the reporter is first registered
to initially register all existing metrics
Arguments:
metrics (list of KafkaMetric): All currently existing metrics
"""
raise NotImplementedError
@abc.abstractmethod
def metric_change(self, metric):
"""
This is called whenever a metric is updated or added
Arguments:
metric (KafkaMetric)
"""
raise NotImplementedError
@abc.abstractmethod
def metric_removal(self, metric):
"""
This is called whenever a metric is removed
Arguments:
metric (KafkaMetric)
"""
raise NotImplementedError
@abc.abstractmethod
def configure(self, configs):
"""
Configure this class with the given key-value pairs
Arguments:
configs (dict of {str, ?})
"""
raise NotImplementedError
@abc.abstractmethod
def close(self):
"""Called when the metrics repository is closed."""
raise NotImplementedError
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