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, 39 insertions, 0 deletions

diff --git a/kafka/metrics/quota.py b/kafka/metrics/quota.py
new file mode 100644
index 0000000..0410e37
--- /dev/null
+++ b/kafka/metrics/quota.py
@@ -0,0 +1,39 @@
+class Quota(object):
+    """An upper or lower bound for metrics"""
+    def __init__(self, bound, is_upper):
+        self._bound = bound
+        self._upper = is_upper
+
+    @staticmethod
+    def upper_bound(upper_bound):
+        return Quota(upper_bound, True)
+
+    @staticmethod
+    def lower_bound(lower_bound):
+        return Quota(lower_bound, False)
+
+    def is_upper_bound(self):
+        return self._upper
+
+    @property
+    def bound(self):
+        return self._bound
+
+    def is_acceptable(self, value):
+        return ((self.is_upper_bound() and value <= self.bound) or
+                (not self.is_upper_bound() and value >= self.bound))
+
+    def __hash__(self):
+        prime = 31
+        result = prime + self.bound
+        return prime * result + self.is_upper_bound()
+
+    def __eq__(self, other):
+        if self is other:
+            return True
+        return (type(self) == type(other) and
+                self.bound == other.bound and
+                self.is_upper_bound() == other.is_upper_bound())
+
+    def __ne__(self, other):
+        return not self.__eq__(other)