Struct Guard 

pub struct Guard {
    pub otel_guard: Option<OtelGuard>,
    pub default_guard: Option<DefaultGuard>,
}

Available on crate feature tracing_subscriber_ext only.

Combined guard that handles both OtelGuard and optional DefaultGuard

This struct holds the various guards needed to maintain the tracing subscriber.

• otel_guard: OpenTelemetry guard for flushing traces/metrics on drop (None when OTEL disabled)
• default_guard: Subscriber default guard for non-global subscribers (None when using global)

Fields

otel_guard: Option<OtelGuard>

OpenTelemetry guard for proper cleanup (None when OTEL is disabled)

default_guard: Option<DefaultGuard>

Default subscriber guard for non-global mode (None when using global subscriber)

Implementations

impl Guard

pub fn global(otel_guard: Option<OtelGuard>) -> Self

Create a new Guard for global subscriber mode

pub fn non_global( otel_guard: Option<OtelGuard>, default_guard: DefaultGuard, ) -> Self

Create a new Guard for non-global subscriber mode

pub fn otel_guard(&self) -> Option<&OtelGuard>

Get a reference to the underlying OtelGuard if present

pub fn has_otel(&self) -> bool

Check if OpenTelemetry is enabled for this guard

pub fn is_non_global(&self) -> bool

Check if this guard is managing a non-global (thread-local) subscriber

pub fn is_global(&self) -> bool

Check if this guard is for a global subscriber