Struct Logging 

pub struct Logging {
    pub subscriber: Arc<dyn Subscriber + Send + Sync>,
    pub reload: LogLevelReloadHandles,
    pub capture: Arc<State>,
}

Owns the server’s shared logging and tracing state.

The singleton groups the configured subscriber, reload handles, and ephemeral capture registry. Server exposes this value to components that adjust logging.

Fields

subscriber: Arc<dyn Subscriber + Send + Sync>

Retains the subscriber configured for the server.

Initialization may register it globally when log_global_default is enabled. Otherwise no global registration occurs, and disabled logging can retain a no-op subscriber.

reload: LogLevelReloadHandles

Named handles for changing subscriber filters at runtime.

Administrative commands and scoped guards use these handles without knowing the concrete subscriber stack type.

capture: Arc<State>

Shared registration state for ephemeral tracing captures.

Capture guards add and remove callbacks observed by the capture layer.