From 49edd2946c06954e3ad4e7bebf77ebcdaeedfc92 Mon Sep 17 00:00:00 2001
From: anthony sottile <anthony.sottile@sentry.io>
Date: Mon, 6 May 2024 16:32:55 -0400
Subject: [PATCH] ref: add metric when canonical key falls back

---
 src/sentry/utils/canonical.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/sentry/utils/canonical.py b/src/sentry/utils/canonical.py
index 310fd1b971b203..54468d63e7c929 100644
--- a/src/sentry/utils/canonical.py
+++ b/src/sentry/utils/canonical.py
@@ -43,7 +43,14 @@
 
 
 def get_canonical_name(key: str) -> str:
-    return CANONICAL_KEY_MAPPING.get(key, (key,))[0]
+    rv = CANONICAL_KEY_MAPPING.get(key)
+    if rv is None:
+        return key
+    else:
+        from sentry.utils import metrics
+
+        metrics.incr("canonical-legacy-key")
+        return rv[0]
 
 
 class CanonicalKeyView(Mapping[str, V]):