Change CacheMetrics to be quicker

We change it so that each cache has an individual CacheMetric, instead
of having one global CacheMetric. This means that when a cache tries to
increment a counter it does not need to go through so many indirections.

1 files changed, 10 insertions, 13 deletions

diff --git a/tests/metrics/test_metric.py b/tests/metrics/test_metric.py
index f3c1927ce1..f85455a5af 100644
--- a/tests/metrics/test_metric.py
+++ b/tests/metrics/test_metric.py
@@ -61,9 +61,6 @@ class CounterMetricTestCase(unittest.TestCase):
             'vector{method="PUT"} 1',
         ])
 
-        # Check that passing too few values errors
-        self.assertRaises(ValueError, counter.inc)
-
 
 class CallbackMetricTestCase(unittest.TestCase):
 
@@ -138,27 +135,27 @@ class CacheMetricTestCase(unittest.TestCase):
     def test_cache(self):
         d = dict()
 
-        metric = CacheMetric("cache", lambda: len(d))
+        metric = CacheMetric("cache", lambda: len(d), "cache_name")
 
         self.assertEquals(metric.render(), [
-            'cache:hits 0',
-            'cache:total 0',
-            'cache:size 0',
+            'cache:hits{name="cache_name"} 0',
+            'cache:total{name="cache_name"} 0',
+            'cache:size{name="cache_name"} 0',
         ])
 
         metric.inc_misses()
         d["key"] = "value"
 
         self.assertEquals(metric.render(), [
-            'cache:hits 0',
-            'cache:total 1',
-            'cache:size 1',
+            'cache:hits{name="cache_name"} 0',
+            'cache:total{name="cache_name"} 1',
+            'cache:size{name="cache_name"} 1',
         ])
 
         metric.inc_hits()
 
         self.assertEquals(metric.render(), [
-            'cache:hits 1',
-            'cache:total 2',
-            'cache:size 1',
+            'cache:hits{name="cache_name"} 1',
+            'cache:total{name="cache_name"} 2',
+            'cache:size{name="cache_name"} 1',
         ])