Struct SessionExtensions 

pub struct SessionExtensions { /* private fields */ }

Per-connection typed extension store, keyed by TypeId.

Allows hooks and handlers to store arbitrary per-session state that is automatically cleaned up when the connection closes. Uses interior mutability so it can be accessed from &dyn ClientInfo.

Implementations

impl SessionExtensions

pub fn new() -> Self

Create a new empty extension store.

pub fn get_or_insert_with<T: Send + Sync + 'static>( &self, f: impl FnOnce() -> T, ) -> Arc<T>

Get an extension by type, or insert a default value if not present.

pub fn get<T: Send + Sync + 'static>(&self) -> Option<Arc<T>>

Get an extension by type, returning None if not present.

pub fn insert<T: Send + Sync + 'static>(&self, val: T) -> Option<Arc<T>>

Insert an extension by type, replacing any existing value.

Trait Implementations

impl Debug for SessionExtensions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SessionExtensions

fn default() -> SessionExtensions

Returns the “default value” for a type.