Trait opentelemetry::sdk::export::metrics::Subtractor[−][src]

pub trait Subtractor {
    fn subtract(
        &self, 
        operand: &(dyn Aggregator + Send + Sync), 
        result: &(dyn Aggregator + Send + Sync), 
        descriptor: &Descriptor
    ) -> Result<()>;
}
This is supported 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

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

Implementors