feat(unstable): kv.watch() (#21147)

This commit adds support for a new `kv.watch()` method that allows
watching for changes to a key-value pair. This is useful for cases
where you want to be notified when a key-value pair changes, but
don't want to have to poll for changes.

---------

Co-authored-by: losfair <zhy20000919@hotmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/ext/kv/remote.rs b/ext/kv/remote.rs
index 7cac6b9c3..855b091fa 100644
--- a/ext/kv/remote.rs
+++ b/ext/kv/remote.rs
@@ -66,6 +66,15 @@ pub struct PermissionChecker<P: RemoteDbHandlerPermissions> {
   _permissions: PhantomData<P>,
 }
 
+impl<P: RemoteDbHandlerPermissions> Clone for PermissionChecker<P> {
+  fn clone(&self) -> Self {
+    Self {
+      state: self.state.clone(),
+      _permissions: PhantomData,
+    }
+  }
+}
+
 impl<P: RemoteDbHandlerPermissions + 'static> denokv_remote::RemotePermissions
   for PermissionChecker<P>
 {