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mod.rs
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mod.rs
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//! Id Generator
pub(super) mod aws;
use opentelemetry_api::trace::{SpanId, TraceId};
use rand::{rngs, Rng};
use std::cell::RefCell;
use std::fmt;
/// Interface for generating IDs
pub trait IdGenerator: Send + Sync + fmt::Debug {
/// Generate a new `TraceId`
fn new_trace_id(&self) -> TraceId;
/// Generate a new `SpanId`
fn new_span_id(&self) -> SpanId;
}
/// Default [`IdGenerator`] implementation.
///
/// Generates Trace and Span ids using a random number generator.
#[derive(Clone, Debug, Default)]
pub struct RandomIdGenerator {
_private: (),
}
impl IdGenerator for RandomIdGenerator {
fn new_trace_id(&self) -> TraceId {
CURRENT_RNG.with(|rng| TraceId::from(rng.borrow_mut().gen::<[u8; 16]>()))
}
fn new_span_id(&self) -> SpanId {
CURRENT_RNG.with(|rng| SpanId::from(rng.borrow_mut().gen::<[u8; 8]>()))
}
}
thread_local! {
/// Store random number generator for each thread
static CURRENT_RNG: RefCell<rngs::ThreadRng> = RefCell::new(rngs::ThreadRng::default());
}