Rename Metrics' "keys" to "labels"

synapse/federation/transaction_queue.py

@@ -71,11 +71,11 @@ class TransactionQueue(object):
 
         metrics.register_callback("pending_pdus",
             lambda: {(dest,): len(pdus[dest]) for dest in pdus.keys()},
-            keys=["dest"],
+            labels=["dest"],
         )
         metrics.register_callback("pending_edus",
             lambda: {(dest,): len(edus[dest]) for dest in edus.keys()},
-            keys=["dest"],
+            labels=["dest"],
         )
 
     def can_send_to(self, destination):

synapse/http/client.py

@@ -35,10 +35,10 @@ logger = logging.getLogger(__name__)
 metrics = synapse.metrics.get_metrics_for(__name__)
 
 outgoing_requests_counter = metrics.register_counter("outgoing_requests",
-    keys=["method"],
+    labels=["method"],
 )
 incoming_responses_counter = metrics.register_counter("incoming_responses",
-    keys=["method","code"],
+    labels=["method","code"],
 )
 
 

synapse/http/matrixfederationclient.py

@@ -44,10 +44,10 @@ logger = logging.getLogger(__name__)
 metrics = synapse.metrics.get_metrics_for(__name__)
 
 outgoing_requests_counter = metrics.register_counter("outgoing_requests",
-    keys=["method"],
+    labels=["method"],
 )
 incoming_responses_counter = metrics.register_counter("incoming_responses",
-    keys=["method","code"],
+    labels=["method","code"],
 )
 
 

synapse/http/server.py

@@ -38,10 +38,10 @@ logger = logging.getLogger(__name__)
 metrics = synapse.metrics.get_metrics_for(__name__)
 
 incoming_requests_counter = metrics.register_counter("incoming_requests",
-    keys=["method"],
+    labels=["method"],
 )
 outgoing_responses_counter = metrics.register_counter("outgoing_responses",
-    keys=["method","code"],
+    labels=["method","code"],
 )
 
 

synapse/metrics/metric.py

@@ -25,22 +25,22 @@ def map_concat(func, items):
 
 class BaseMetric(object):
 
-    def __init__(self, name, keys=[]):
+    def __init__(self, name, labels=[]):
         self.name = name
-        self.keys = keys # OK not to clone as we never write it
+        self.labels = labels # OK not to clone as we never write it
 
     def dimension(self):
-        return len(self.keys)
+        return len(self.labels)
 
     def is_scalar(self):
-        return not len(self.keys)
+        return not len(self.labels)
 
     def _render_key(self, values):
         if self.is_scalar():
             return ""
         # TODO: some kind of value escape
         return "{%s}" % (
-            ",".join(["%s=%s" % kv for kv in zip(self.keys, values)])
+            ",".join(["%s=%s" % kv for kv in zip(self.labels, values)])
         )
 
     def render(self):
@@ -62,7 +62,7 @@ class CounterMetric(BaseMetric):
 
     def inc(self, *values):
         if len(values) != self.dimension():
-            raise ValueError("Expected as many values to inc() as keys (%d)" %
+            raise ValueError("Expected as many values to inc() as labels (%d)" %
                 (self.dimension())
             )
 
@@ -85,8 +85,8 @@ class CallbackMetric(BaseMetric):
     it is rendered. Typically this is used to implement gauges that yield the
     size or other state of some in-memory object by actively querying it."""
 
-    def __init__(self, name, callback, keys=[]):
-        super(CallbackMetric, self).__init__(name, keys=keys)
+    def __init__(self, name, callback, labels=[]):
+        super(CallbackMetric, self).__init__(name, labels=labels)
 
         self.callback = callback
 
@@ -139,15 +139,15 @@ class CacheMetric(object):
     This metric generates standard metric name pairs, so that monitoring rules
     can easily be applied to measure hit ratio."""
 
-    def __init__(self, name, size_callback, keys=[]):
+    def __init__(self, name, size_callback, labels=[]):
         self.name = name
 
-        self.hits   = CounterMetric(name + ":hits",   keys=keys)
-        self.misses = CounterMetric(name + ":misses", keys=keys)
+        self.hits   = CounterMetric(name + ":hits",   labels=labels)
+        self.misses = CounterMetric(name + ":misses", labels=labels)
 
         self.size = CallbackMetric(name + ":size",
             callback=size_callback,
-            keys=keys,
+            labels=labels,
         )
 
     def inc_hits(self, *values):

synapse/storage/_base.py

@@ -38,9 +38,9 @@ transaction_logger = logging.getLogger("synapse.storage.txn")
 
 metrics = synapse.metrics.get_metrics_for("synapse.storage")
 
-sql_query_timer = metrics.register_timer("queries", keys=["verb"])
-sql_txn_timer = metrics.register_timer("transactions", keys=["desc"])
-sql_getevents_timer = metrics.register_timer("get_events", keys=["desc"])
+sql_query_timer = metrics.register_timer("queries", labels=["verb"])
+sql_txn_timer = metrics.register_timer("transactions", labels=["desc"])
+sql_getevents_timer = metrics.register_timer("get_events", labels=["desc"])
 
 
 # TODO(paul):

tests/metrics/test_metric.py

@@ -43,7 +43,7 @@ class CounterMetricTestCase(unittest.TestCase):
         ])
 
     def test_vector(self):
-        counter = CounterMetric("vector", keys=["method"])
+        counter = CounterMetric("vector", labels=["method"])
 
         # Empty counter doesn't yet know what values it has
         self.assertEquals(counter.render(), [])
@@ -83,7 +83,7 @@ class CallbackMetricTestCase(unittest.TestCase):
     def test_vector(self):
         vals = dict()
 
-        metric = CallbackMetric("values", lambda: vals, keys=["type"])
+        metric = CallbackMetric("values", lambda: vals, labels=["type"])
 
         self.assertEquals(metric.render(), [])
 
@@ -115,7 +115,7 @@ class TimerMetricTestCase(unittest.TestCase):
         ])
 
     def test_vector(self):
-        metric = TimerMetric("queries", keys=["verb"])
+        metric = TimerMetric("queries", labels=["verb"])
 
         self.assertEquals(metric.render(), [])