Struct AppReplica 

pub struct AppReplica;

Exposes the ways for the application to introspect its own runtime replica, primarily via a numerical index (injected via the environment at runtime).

Implementations

impl AppReplica

pub fn index() -> Option<usize>

Returns the usize index of this application’s replica. Lazily discerns the value on the first call, then returns a copy of the same value on each repeated call.

This value can be set from the APP_REPLICA_INDEX environment variable at runtime. The same environment variable set at compile time produces no effect.

If the environment variable is not set at runtime, or its value is not a valid usize integer, this method will return None. Otherwise, no validation is performed on the value.

pub fn lifetime_id() -> &'static LifetimeId

Returns a pseudo-randomized LifetimeId of this application’s replica that is stable throughout a single runtime. Lazily generates the value on the first call.

This pseudo-randomized value is not cryptographically secure.