Struct ConnOpts 

pub struct ConnOpts<'a> {
    pub engine: Arc<RwLock<Engine>>,
    pub tx_gate: TxGate,
    pub expected_password: Option<Zeroizing<String>>,
    pub users: Arc<UserStore>,
    pub shutdown_rx: &'a mut Receiver<bool>,
    pub idle_timeout: Duration,
    pub query_timeout: Duration,
    pub rate_limiter: Option<&'a AuthRateLimiter>,
    pub peer_addr: Option<SocketAddr>,
    pub metrics: Arc<Metrics>,
    pub tx_wait_timeout: Duration,
    pub db_name: Option<String>,
}

Options for a single connection, bundled to keep handle_connection’s argument list short.

Fields

engine: Arc<RwLock<Engine>>

tx_gate: TxGate

expected_password: Option<Zeroizing<String>>

Expected client password. Wrapped in Zeroizing so the secret is wiped from memory on drop (defends against leaking via a core dump).

users: Arc<UserStore>

Multi-user store loaded from the data dir at startup. When it has users, the handshake authenticates (username, password) against it; when empty the server falls back to expected_password. Shared across connections.

shutdown_rx: &'a mut Receiver<bool>

idle_timeout: Duration

query_timeout: Duration

rate_limiter: Option<&'a AuthRateLimiter>

peer_addr: Option<SocketAddr>

metrics: Arc<Metrics>

Shared server metrics. Always present; tests pass Arc::new(Metrics::new()).

tx_wait_timeout: Duration

How long an explicit begin waits to acquire the transaction gate while another connection holds an open explicit transaction, before giving up with a clear timeout error instead of queueing indefinitely.

db_name: Option<String>

When Some, the single database name this server serves. A CONNECT that explicitly names a different database is rejected at connect time. None accepts any name (0.9.x behavior) and only warns.