Struct NullExporter 

pub struct NullExporter { /* private fields */ }

A test exporter that collects spans in memory.

Thread-safe via std::sync::Mutex (available when std feature is on) or via single-threaded usage in no_std tests.

Examples

use grafos_observe::export::NullExporter;
use grafos_observe::export::SpanExporter;
use grafos_observe::span::ResourceSpan;
use grafos_observe::trace::TraceContext;

let exporter = NullExporter::new();
let span = ResourceSpan::new("test", TraceContext::default());
exporter.export(&[span]);
assert_eq!(exporter.len(), 1);

let spans = exporter.drain();
assert_eq!(spans.len(), 1);
assert_eq!(spans[0].name, "test");

Implementations

impl NullExporter

pub fn new() -> Self

Create a new null exporter.

pub fn len(&self) -> usize

Number of spans collected so far.

pub fn is_empty(&self) -> bool

Whether any spans have been collected.

pub fn drain(&self) -> Vec<ResourceSpan>

Drain all collected spans, returning them and clearing the buffer.

pub fn snapshot(&self) -> Vec<ResourceSpan>

Get a snapshot (clone) of all collected spans.

Trait Implementations

impl Default for NullExporter

fn default() -> Self

Returns the “default value” for a type.

impl SpanExporter for NullExporter

fn export(&self, spans: &[ResourceSpan])

Export a batch of spans. Implementations should not block the caller for extended periods; buffering and async flush are preferred.

fn flush(&self)

Flush any buffered spans. Called on shutdown.