Kafka metrics java port. No reporters or instrumentation.

There is no straight translation for the JMX reporter into python,
so I'll do something else in a separate commit.

1 files changed, 55 insertions, 0 deletions

diff --git a/kafka/metrics/metrics_reporter.py b/kafka/metrics/metrics_reporter.py
new file mode 100644
index 0000000..b48ad0b
--- /dev/null
+++ b/kafka/metrics/metrics_reporter.py
@@ -0,0 +1,55 @@
+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