Struct BatchSpanProcessor

pub struct BatchSpanProcessor { /* private fields */ }

The BatchSpanProcessor collects finished spans in a buffer and exports them in batches to the configured SpanExporter. This processor is ideal for high-throughput environments, as it minimizes the overhead of exporting spans individually. It uses a dedicated background thread to manage and export spans asynchronously, ensuring that the application’s main execution flow is not blocked.

This processor supports the following configurations:

• Queue size: Maximum number of spans that can be buffered.
• Batch size: Maximum number of spans to include in a single export.
• Scheduled delay: Frequency at which the batch is exported.

When using this processor with the OTLP Exporter, the following exporter features are supported:

• grpc-tonic: Requires TracerProvider to be created within a tokio runtime.
• reqwest-blocking-client: Works with a regular main or tokio::main.

In other words, other clients like reqwest and hyper are not supported.

BatchSpanProcessor buffers spans in memory and exports them in batches. An export is triggered when max_export_batch_size is reached or every scheduled_delay milliseconds. Users can explicitly trigger an export using the force_flush method. Shutdown also triggers an export of all buffered spans and is recommended to be called before the application exits to ensure all buffered spans are exported.

Warning: When using tokio’s current-thread runtime, shutdown(), which is a blocking call ,should not be called from your main thread. This can cause deadlock. Instead, call shutdown() from a separate thread or use tokio’s spawn_blocking.

Implementations

impl BatchSpanProcessor

pub fn new<E>(exporter: E, config: BatchConfig) -> BatchSpanProcessor

where E: SpanExporter + Send + 'static,

Creates a new instance of BatchSpanProcessor.

pub fn builder<E>(exporter: E) -> BatchSpanProcessorBuilder<E>

where E: SpanExporter + Send + 'static,

builder

Trait Implementations

impl Debug for BatchSpanProcessor

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl SpanProcessor for BatchSpanProcessor

fn on_start(&self, _span: &mut Span, _cx: &Context)

Handles span start.

fn on_end(&self, span: SpanData)

Handles span end.

fn force_flush(&self) -> Result<(), OTelSdkError>

Flushes all pending spans.

fn shutdown(&self) -> Result<(), OTelSdkError>

Shuts down the processor.

fn set_resource(&mut self, resource: &Resource)

Set the resource for the processor.