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opentelemetry-go/api/metric/observer.go
Joshua MacDonald 06f833e2ae
Unique instrument checking (#580)
* Add skeleton uniqueness checker

* Fix the build w/ new code in place

* Add sync tests

* More test

* Implement global uniqueness checking

* Set the library name

* Ensure ordered global initialization

* Use proper require statement for errors

* Comment

* Apply feedback fixes

* Comment and rename from feedback
2020-03-24 10:54:08 -07:00

48 lines
1.5 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
// Int64ObserverResult is an interface for reporting integral
// observations.
type Int64ObserverResult interface {
Observe(value int64, labels LabelSet)
}
// Float64ObserverResult is an interface for reporting floating point
// observations.
type Float64ObserverResult interface {
Observe(value float64, labels LabelSet)
}
// Int64ObserverCallback is a type of callback that integral
// observers run.
type Int64ObserverCallback func(result Int64ObserverResult)
// Float64ObserverCallback is a type of callback that floating point
// observers run.
type Float64ObserverCallback func(result Float64ObserverResult)
// Int64Observer is a metric that captures a set of int64 values at a
// point in time.
type Int64Observer struct {
asyncInstrument
}
// Float64Observer is a metric that captures a set of float64 values
// at a point in time.
type Float64Observer struct {
asyncInstrument
}