89 lines
3.5 KiB
Go
89 lines
3.5 KiB
Go
|
// Copyright The OpenTelemetry Authors
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package metric // import "go.opentelemetry.io/otel/sdk/metric"
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"go.opentelemetry.io/otel/sdk/metric/metricdata"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ErrExporterShutdown is returned if Export or Shutdown are called after an
|
||
|
|
// Exporter has been Shutdown.
|
||
|
|
var ErrExporterShutdown = fmt.Errorf("exporter is shutdown")
|
||
|
|
|
||
|
|
// Exporter handles the delivery of metric data to external receivers. This is
|
||
|
|
// the final component in the metric push pipeline.
|
||
|
|
type Exporter interface {
|
||
|
|
// Temporality returns the Temporality to use for an instrument kind.
|
||
|
|
//
|
||
|
|
// This method needs to be concurrent safe with itself and all the other
|
||
|
|
// Exporter methods.
|
||
|
|
Temporality(InstrumentKind) metricdata.Temporality
|
||
|
|
// DO NOT CHANGE: any modification will not be backwards compatible and
|
||
|
|
// must never be done outside of a new major release.
|
||
|
|
|
||
|
|
// Aggregation returns the Aggregation to use for an instrument kind.
|
||
|
|
//
|
||
|
|
// This method needs to be concurrent safe with itself and all the other
|
||
|
|
// Exporter methods.
|
||
|
|
Aggregation(InstrumentKind) Aggregation
|
||
|
|
// DO NOT CHANGE: any modification will not be backwards compatible and
|
||
|
|
// must never be done outside of a new major release.
|
||
|
|
|
||
|
|
// Export serializes and transmits metric data to a receiver.
|
||
|
|
//
|
||
|
|
// This is called synchronously, there is no concurrency safety
|
||
|
|
// requirement. Because of this, it is critical that all timeouts and
|
||
|
|
// cancellations of the passed context be honored.
|
||
|
|
//
|
||
|
|
// All retry logic must be contained in this function. The SDK does not
|
||
|
|
// implement any retry logic. All errors returned by this function are
|
||
|
|
// considered unrecoverable and will be reported to a configured error
|
||
|
|
// Handler.
|
||
|
|
//
|
||
|
|
// The passed ResourceMetrics may be reused when the call completes. If an
|
||
|
|
// exporter needs to hold this data after it returns, it needs to make a
|
||
|
|
// copy.
|
||
|
|
Export(context.Context, *metricdata.ResourceMetrics) error
|
||
|
|
// DO NOT CHANGE: any modification will not be backwards compatible and
|
||
|
|
// must never be done outside of a new major release.
|
||
|
|
|
||
|
|
// ForceFlush flushes any metric data held by an exporter.
|
||
|
|
//
|
||
|
|
// The deadline or cancellation of the passed context must be honored. An
|
||
|
|
// appropriate error should be returned in these situations.
|
||
|
|
//
|
||
|
|
// This method needs to be concurrent safe.
|
||
|
|
ForceFlush(context.Context) error
|
||
|
|
// DO NOT CHANGE: any modification will not be backwards compatible and
|
||
|
|
// must never be done outside of a new major release.
|
||
|
|
|
||
|
|
// Shutdown flushes all metric data held by an exporter and releases any
|
||
|
|
// held computational resources.
|
||
|
|
//
|
||
|
|
// The deadline or cancellation of the passed context must be honored. An
|
||
|
|
// appropriate error should be returned in these situations.
|
||
|
|
//
|
||
|
|
// After Shutdown is called, calls to Export will perform no operation and
|
||
|
|
// instead will return an error indicating the shutdown state.
|
||
|
|
//
|
||
|
|
// This method needs to be concurrent safe.
|
||
|
|
Shutdown(context.Context) error
|
||
|
|
// DO NOT CHANGE: any modification will not be backwards compatible and
|
||
|
|
// must never be done outside of a new major release.
|
||
|
|
}
|