Enum ConnectionState 

pub enum ConnectionState {
    Disconnected,
    Connected,
    ConnectionLost,
    SessionExpired,
}

Observable connection state of a Request or Subscribe handle.

Transitions are session-layer only — the NNG dialer’s own redial loop runs underneath and doesn’t generate a separate observable state. The caller sees Connected → ConnectionLost → Connected (or → SessionExpired) and nothing in between.

Variants

Disconnected

Initial state + after a successful disconnect().

Connected

Socket is up, session is restored (if one was ever established).

ConnectionLost

NNG pipe event REM_POST fired. The dialer is redialling the transport underneath; we’ll transition back to Connected (or to SessionExpired) once the pipe comes back.

SessionExpired

The socket came back, but RestoreSession(token) was rejected. Caller action required — re-login with fresh credentials, or give up. The library will not silently re-login with cached credentials.

Implementations

impl ConnectionState

pub fn is_connected(self) -> bool

Convenience: is the socket currently usable for RPCs?

pub fn is_terminal(self) -> bool

Convenience: is this a terminal state that needs caller action?

Trait Implementations

impl Clone for ConnectionState

fn clone(&self) -> ConnectionState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ConnectionState

impl Debug for ConnectionState

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

Formats the value using the given formatter.

impl Eq for ConnectionState

impl Hash for ConnectionState

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ConnectionState

fn eq(&self, other: &ConnectionState) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ConnectionState