mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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a485d0ec64
* Update License header for all source files - Add Apache 2.0 header to source files that did not have one. - Update all existing headers dated to 2019 to be 2020 - Remove comma from License header to comply with the Apache 2.0 guidelines. * Update Copyright notice Use the standard Copyright notices outlined by the [CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric
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import (
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"context"
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"errors"
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"go.opentelemetry.io/otel/api/core"
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)
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type syncInstrument struct {
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instrument SyncImpl
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}
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type syncBoundInstrument struct {
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boundInstrument BoundSyncImpl
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}
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type asyncInstrument struct {
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instrument AsyncImpl
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}
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var ErrSDKReturnedNilImpl = errors.New("SDK returned a nil implementation")
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func (s syncInstrument) bind(labels LabelSet) syncBoundInstrument {
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return newSyncBoundInstrument(s.instrument.Bind(labels))
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}
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func (s syncInstrument) float64Measurement(value float64) Measurement {
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return newMeasurement(s.instrument, core.NewFloat64Number(value))
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}
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func (s syncInstrument) int64Measurement(value int64) Measurement {
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return newMeasurement(s.instrument, core.NewInt64Number(value))
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}
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func (s syncInstrument) directRecord(ctx context.Context, number core.Number, labels LabelSet) {
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s.instrument.RecordOne(ctx, number, labels)
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}
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func (s syncInstrument) SyncImpl() SyncImpl {
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return s.instrument
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}
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func (h syncBoundInstrument) directRecord(ctx context.Context, number core.Number) {
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h.boundInstrument.RecordOne(ctx, number)
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}
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func (h syncBoundInstrument) Unbind() {
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h.boundInstrument.Unbind()
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}
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func (a asyncInstrument) AsyncImpl() AsyncImpl {
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return a.instrument
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}
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// checkNewSync receives an SyncImpl and potential
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// error, and returns the same types, checking for and ensuring that
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// the returned interface is not nil.
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func checkNewSync(instrument SyncImpl, err error) (syncInstrument, error) {
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if instrument == nil {
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if err == nil {
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err = ErrSDKReturnedNilImpl
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}
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// Note: an alternate behavior would be to synthesize a new name
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// or group all duplicately-named instruments of a certain type
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// together and use a tag for the original name, e.g.,
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// name = 'invalid.counter.int64'
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// label = 'original-name=duplicate-counter-name'
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instrument = NoopSync{}
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}
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return syncInstrument{
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instrument: instrument,
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}, err
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}
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func newSyncBoundInstrument(boundInstrument BoundSyncImpl) syncBoundInstrument {
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return syncBoundInstrument{
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boundInstrument: boundInstrument,
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}
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}
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func newMeasurement(instrument SyncImpl, number core.Number) Measurement {
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return Measurement{
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instrument: instrument,
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number: number,
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}
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}
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// checkNewAsync receives an AsyncImpl and potential
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// error, and returns the same types, checking for and ensuring that
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// the returned interface is not nil.
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func checkNewAsync(instrument AsyncImpl, err error) (asyncInstrument, error) {
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if instrument == nil {
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if err == nil {
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err = ErrSDKReturnedNilImpl
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}
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instrument = NoopAsync{}
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}
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return asyncInstrument{
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instrument: instrument,
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}, err
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}
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