Struct AmbientSlot 

pub struct AmbientSlot(/* private fields */);

A type-erased slot for a globally shared Runtime.

The slot is suitable to store directly in a static; it coordinates its own initialization using a OnceLock.

Implementations

impl AmbientSlot

pub const fn new() -> Self

Create a new, empty slot.

pub fn is_enabled(&self) -> bool

Whether the slot has been initialized with a runtime.

pub fn init<TEmitter, TFilter, TCtxt, TClock, TRng>( &self, pipeline: Runtime<TEmitter, TFilter, TCtxt, TClock, TRng>, ) -> Option<Runtime<&TEmitter, &TFilter, &TCtxt, &TClock, &TRng>>

where TEmitter: Emitter + Send + Sync + 'static, TFilter: Filter + Send + Sync + 'static, TCtxt: Ctxt + Send + Sync + 'static, TCtxt::Frame: Send + 'static, TClock: Clock + Send + Sync + 'static, TRng: Rng + Send + Sync + 'static,

Try initialize the slot with the given components.

If the slot has not already been initialized then the components will be installed and a reference to the resulting Runtime will be returned. If the slot has already been initialized by another caller then this method will discard the components and return None.

pub fn get(&self) -> &AmbientRuntime<'_>

Get the underlying Runtime, or a Runtime::default if it hasn’t been initialized yet.