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.
metric package provides an API for reporting diagnostic measurements using instruments categorized as follows: Synchronous instruments are called by the user with a Context. Asynchronous instruments are called by the SDK during collection. Additive instruments are semantically intended for capturing a sum. Non-additive instruments are intended for capturing a distribution. Additive instruments may be monotonic, in which case they are non-descreasing and naturally define a rate. The synchronous instrument names are: Counter: additive, monotonic UpDownCounter: additive ValueRecorder: non-additive and the asynchronous instruments are: SumObserver: additive, monotonic UpDownSumObserver: additive ValueObserver: non-additive All instruments are provided with support for either float64 or int64 input values. The Meter interface supports allocating new instruments as well as interfaces for recording batches of synchronous measurements or asynchronous observations. To obtain a Meter, use a Provider. The Provider interface supports obtaining a named Meter interface. To obtain a Provider implementation, initialize and configure any compatible SDK.