MetricExporter (OpenTelemetry SDK Metrics)

All Known Implementing Classes:

InMemoryMetricExporter
```
public interface MetricExporter
```
MetricExporter is the interface that all "push based" metric libraries should use to export metrics to the OpenTelemetry exporters.
All OpenTelemetry exporters should allow access to a MetricExporter instance.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`io.opentelemetry.sdk.common.CompletableResultCode`	`export(Collection<MetricData> metrics)`	Exports the collection of given `MetricData`.
`io.opentelemetry.sdk.common.CompletableResultCode`	`flush()`	Exports the collection of `MetricData` that have not yet been exported.
`io.opentelemetry.sdk.common.CompletableResultCode`	`shutdown()`	Called when the associated IntervalMetricReader is shutdown.

- Method Detail
  - export
```
io.opentelemetry.sdk.common.CompletableResultCode export(Collection<MetricData> metrics)
```
    Exports the collection of given MetricData. Note that export operations can be performed simultaneously depending on the type of metric reader being used. However, the IntervalMetricReader will ensure that only one export can occur at a time.
    
    Parameters:
    
    metrics - the collection of MetricData to be exported.
    
    Returns:
    
    the result of the export, which is often an asynchronous operation.
  - flush
```
io.opentelemetry.sdk.common.CompletableResultCode flush()
```
    Exports the collection of MetricData that have not yet been exported. Note that flush operations can be performed simultaneously depending on the type of metric reader being used. However, the IntervalMetricReader will ensure that only one export can occur at a time.
    
    Returns:
    
    the result of the flush, which is often an asynchronous operation.
  - shutdown
```
io.opentelemetry.sdk.common.CompletableResultCode shutdown()
```
    Called when the associated IntervalMetricReader is shutdown.
    
    Returns:
    
    a CompletableResultCode which is completed when shutdown completes.