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authorPaul "LeoNerd" Evans <paul@matrix.org>2015-03-04 16:50:23 +0000
committerPaul "LeoNerd" Evans <paul@matrix.org>2015-03-12 16:24:50 +0000
commit59c448f074439f1c6f5f51765e24ecfcff8e4101 (patch)
tree3dc781ff3ac3198e866144da94b5c592868122eb /synapse
parentInitial attempt at a scalar callback-based metric to give instantaneous snaps... (diff)
downloadsynapse-59c448f074439f1c6f5f51765e24ecfcff8e4101.tar.xz
Add a scalar gauge metric on the size of the presence user cachemap
Diffstat (limited to 'synapse')
-rw-r--r--synapse/handlers/presence.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index 28e922f79b..698946a48b 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -21,6 +21,7 @@ from synapse.api.constants import PresenceState
 from synapse.util.logutils import log_function
 from synapse.util.logcontext import PreserveLoggingContext
 from synapse.types import UserID
+import synapse.metrics
 
 from ._base import BaseHandler
 
@@ -29,6 +30,8 @@ import logging
 
 logger = logging.getLogger(__name__)
 
+metrics = synapse.metrics.get_metrics_for(__name__)
+
 
 # TODO(paul): Maybe there's one of these I can steal from somewhere
 def partition(l, func):
@@ -133,6 +136,10 @@ class PresenceHandler(BaseHandler):
         self._user_cachemap = {}
         self._user_cachemap_latest_serial = 0
 
+        metrics.register_callback("user_cachemap:size",
+            lambda: len(self._user_cachemap)
+        )
+
     def _get_or_make_usercache(self, user):
         """If the cache entry doesn't exist, initialise a new one."""
         if user not in self._user_cachemap: