Add functionality for counting events

Similar to the existing streams functionality, this patch exposes
in quincy the ability added to winchester and quince to count
filtered events.

There are corresponding changes in winchester, quince, and klugman.

Change-Id: If2cdb66c4752fd19eac642a6fbec3c5d45745d29

quincy/v1_api.py

@@ -110,6 +110,40 @@ class StreamItem(common.FalconBase):
         self.impl.reset_stream(stream_id)
 
 
+def _find_events(impl, req, resp, count=False):
+    from_datetime = req.get_param('from_datetime')
+    to_datetime = req.get_param('to_datetime')
+    event_name = req.get_param('event_name')
+    traits = req.get_param('traits')
+    traits = _convert_traits(traits)
+    mark = req.get_param('mark')
+    limit = req.get_param('limit')
+
+    if limit:
+        try:
+            limit = int(limit)
+        except (ValueError, TypeError):
+            limit = DEFAULT_LIMIT
+    else:
+        limit = DEFAULT_LIMIT
+
+    if from_datetime:
+        from_datetime = parser.parse(from_datetime)
+
+    if to_datetime:
+        to_datetime = parser.parse(to_datetime)
+
+    return impl.find_events(from_datetime=from_datetime,
+                            to_datetime=to_datetime,
+                            event_name=event_name,
+                            traits=traits,
+                            mark=mark, limit=limit, count=count)
+
+
+def _get_event(impl, req, resp, message_id):
+    return impl.get_event(message_id)
+
+
 class EventCollection(common.FalconBase):
     # Retrieve events, independent of stream.
     # GET - list stream with qualifiers
@@ -125,42 +159,22 @@ class EventCollection(common.FalconBase):
     # mark - marker for paged results
     # limit - max number of events to return (default: 200)
     def on_get(self, req, resp):
-        from_datetime = req.get_param('from_datetime')
+        events = _find_events(self.impl, req, resp)
-        to_datetime = req.get_param('to_datetime')
-        event_name = req.get_param('event_name')
-        traits = req.get_param('traits')
-        traits = _convert_traits(traits)
-        mark = req.get_param('mark')
-        limit = req.get_param('limit')
-
-        if limit:
-            try:
-                limit = int(limit)
-            except (ValueError, TypeError):
-                limit = DEFAULT_LIMIT
-        else:
-            limit = DEFAULT_LIMIT
-
-        if from_datetime:
-            from_datetime = parser.parse(from_datetime)
-
-        if to_datetime:
-            to_datetime = parser.parse(to_datetime)
-
-        events = self.impl.find_events(from_datetime=from_datetime,
-                                       to_datetime=to_datetime,
-                                       event_name=event_name,
-                                       traits=traits,
-                                       mark=mark, limit=limit)
 
         resp.body = jsonutil.dumps(events)
 
 
 class EventItem(common.FalconBase):
     def on_get(self, req, resp, message_id):
+        # could be /events/123 or /events/count
         message_id = message_id.lower()
-        event = self.impl.get_event(message_id)
+        count = message_id == 'count'
-        resp.body = jsonutil.dumps([event])
+        if count:
+            events = _find_events(self.impl, req, resp, count=count)
+        else:
+            events = _get_event(self.impl, req, resp, message_id)
+
+        resp.body = jsonutil.dumps(events)
 
 
 class Schema(object):

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = quincy
-version = 0.2
+version = 0.3
 author = Dark Secret Software Inc.
 author-email = admin@darksecretsoftware.com
 summary = StackTach.v3 REST API (no implementation)