Struct Session 

pub struct Session { /* private fields */ }

Per-connection stats context, created via Handle::session.

Cheap to clone (an Arc inside): one context is shared by both origin handles of a session (its publish and subscribe halves) so presence and viewer counts are never double-attributed. It carries three things:

• the tier + auth root, so any broadcast reached through a tagged origin handle resolves the right per-(path, tier) counters,
• the presence gauge: sessions bumps when the context is created and sessions_closed when the last clone drops (a more honest close than a separately-held guard),
• the egress viewer refcount map (first/last active subscription per broadcast), driving broadcasts / broadcasts_closed.

Session::default is the no-op context (disabled registry / untagged caller): every bump reached through it is silently dropped, so a handle can hold one unconditionally instead of threading an Option.

Trait Implementations

impl Clone for Session

fn clone(&self) -> Session

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for Session

fn default() -> Session

Returns the “default value” for a type.