Struct Successor 

pub struct Successor { /* private fields */ }

Successor-side state machine, encoded as three concrete types so the compiler enforces protocol ordering. Lifecycle:

1. detect_role returns [Role::Successor(Successor)] — initial state.
2. Successor::handshake consumes self and returns HandshookSuccessor.
3. HandshookSuccessor::wait_for_begin consumes self and returns BegunSuccessor.
4. From BegunSuccessor the consumer takes inherited listeners, opens its state, then calls BegunSuccessor::announce_and_bind (preferred) or BegunSuccessor::announce_ready.

Out-of-order calls don’t compile: there is no path from Successor to take_listener or announce_ready that doesn’t pass through every preceding state.

Implementations

impl Successor

pub fn handshake(self, build_id: Vec<u8>) -> Result<HandshookSuccessor>

Send Hello, receive HelloAck. Consumes self and returns a HandshookSuccessor from which the next phase can proceed. On protocol error the underlying UnixStream and inherited listeners are dropped — the caller has no usable post-error state.

pub fn listener_names(&self) -> Vec<String>

Names of all inherited listeners. Safe to call before handshake for diagnostic / sanity checks (e.g. asserting the supervisor passed the expected listeners). Listener consumption only happens post-Begin via BegunSuccessor::take_listener.