opentelemetry_spanprocessor_any::sdk::export::metrics

Trait Subtractor

Source 
pub trait Subtractor {
    // Required method
    fn subtract(
        &self,
        operand: &(dyn Aggregator + Send + Sync),
        result: &(dyn Aggregator + Send + Sync),
        descriptor: &Descriptor,
    ) -> Result<()>;
}
Available on crate feature metrics only.
Expand description

An optional interface implemented by some Aggregators. An Aggregator must support subtract() in order to be configured for a Precomputed-Sum instrument (SumObserver, UpDownSumObserver) using a DeltaExporter.

Required Methods§

Source

fn subtract( &self, operand: &(dyn Aggregator + Send + Sync), result: &(dyn Aggregator + Send + Sync), descriptor: &Descriptor, ) -> Result<()>

Subtract subtracts the operand from this Aggregator and outputs the value in result.

Implementors§