AsynchronousInstrument.Builder (opentelemetry-api 0.12.0 API)

All Superinterfaces:

Instrument.Builder

All Known Subinterfaces:

DoubleSumObserver.Builder, DoubleUpDownSumObserver.Builder, DoubleValueObserver.Builder, LongSumObserver.Builder, LongUpDownSumObserver.Builder, LongValueObserver.Builder

Enclosing interface:

AsynchronousInstrument<R extends AsynchronousInstrument.Result>
```
public static interface AsynchronousInstrument.Builder<R extends AsynchronousInstrument.Result>
extends Instrument.Builder
```
Builder class for AsynchronousInstrument.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`AsynchronousInstrument<R>`	`build()`	Builds and returns a `Instrument` with the desired options.
`AsynchronousInstrument.Builder<R>`	`setCallback(AsynchronousInstrument.Callback<R> callback)`	Sets a callback that gets executed every collection interval.

Methods inherited from interface io.opentelemetry.api.metrics.Instrument.Builder
setDescription, setUnit

- Method Detail
  - setCallback
```
AsynchronousInstrument.Builder<R> setCallback(AsynchronousInstrument.Callback<R> callback)
```
    Sets a callback that gets executed every collection interval.
    Evaluation is deferred until needed, if this AsynchronousInstrument metric is not exported then it will never be called.
    
    Parameters:
    
    callback - the callback to be executed before export.
  - build
```
AsynchronousInstrument<R> build()
```
    Description copied from interface: Instrument.Builder
    
    Builds and returns a Instrument with the desired options.
    
    Specified by:
    
    build in interface Instrument.Builder
    
    Returns:
    
    a Instrument with the desired options.