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, 15 insertions, 0 deletions

diff --git a/kafka/metrics/stats/max_stat.py b/kafka/metrics/stats/max_stat.py
new file mode 100644
index 0000000..8df54d3
--- /dev/null
+++ b/kafka/metrics/stats/max_stat.py
@@ -0,0 +1,15 @@
+from kafka.metrics.stats.sampled_stat import AbstractSampledStat
+
+
+class Max(AbstractSampledStat):
+    """An AbstractSampledStat that gives the max over its samples."""
+    def __init__(self):
+        super(Max, self).__init__(float('-inf'))
+
+    def update(self, sample, config, value, now):
+        sample.value = max(sample.value, value)
+
+    def combine(self, samples, config, now):
+        if not samples:
+            return float('-inf')
+        return float(max(sample.value for sample in samples))