From b239b7160f458faa181d57c7dd47c0d3979ae737 Mon Sep 17 00:00:00 2001
From: hanabi1224 <harlowmoo@gmail.com>
Date: Tue, 22 Jul 2025 19:19:45 +0800
Subject: [PATCH 1/2] feat: impl<T: Collector> Collector for std::sync::Arc<T>

Signed-off-by: hanabi1224 <harlowmoo@gmail.com>
---
 src/collector.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/collector.rs b/src/collector.rs
index 66270c41..eea9d866 100644
--- a/src/collector.rs
+++ b/src/collector.rs
@@ -39,3 +39,9 @@ pub trait Collector: std::fmt::Debug + Send + Sync + 'static {
     /// Once the [`Collector`] is registered, this method is called on each scrape.
     fn encode(&self, encoder: DescriptorEncoder) -> Result<(), std::fmt::Error>;
 }
+
+impl<T: Collector> Collector for std::sync::Arc<T> {
+    fn encode(&self, encoder: DescriptorEncoder) -> Result<(), std::fmt::Error> {
+        self.as_ref().encode(encoder)
+    }
+}

From 76d7b3079cee55c645f7403738c7c309a944bce2 Mon Sep 17 00:00:00 2001
From: hanabi1224 <harlowmoo@gmail.com>
Date: Tue, 22 Jul 2025 19:23:16 +0800
Subject: [PATCH 2/2] changelog

Signed-off-by: hanabi1224 <harlowmoo@gmail.com>
---
 CHANGELOG.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c798c594..006d53b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,9 +14,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Family::get_or_create_owned` can access a metric in a labeled family. This
    method avoids the risk of runtime deadlocks at the expense of creating an
    owned type. See [PR 244].
+
+- `impl<T: Collector> Collector for std::sync::Arc<T>`.
+   See [PR 273].
  
 [PR 244]: https://github.com/prometheus/client_rust/pull/244
 [PR 257]: https://github.com/prometheus/client_rust/pull/257
+[PR 273]: https://github.com/prometheus/client_rust/pull/273
 
 ### Changed