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Initial framework for Aggregators (#2053)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| // <copyright file="Aggregator.cs" company="OpenTelemetry Authors"> | ||
| // 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. | ||
| // </copyright> | ||
|
|
||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
|
|
||
| namespace OpenTelemetry.Metrics | ||
| { | ||
| internal abstract class Aggregator | ||
| { | ||
| internal virtual void Update<T>(DateTimeOffset dt, T value) | ||
| where T : struct | ||
| { | ||
| } | ||
|
|
||
| internal virtual IEnumerable<Metric> Collect() | ||
| { | ||
| return Enumerable.Empty<Metric>(); | ||
| } | ||
| } | ||
| } |
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src/OpenTelemetry/Metrics/Aggregator/LastValueAggregator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // <copyright file="LastValueAggregator.cs" company="OpenTelemetry Authors"> | ||
| // 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. | ||
| // </copyright> | ||
|
|
||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Diagnostics.Metrics; | ||
| using System.Linq; | ||
|
|
||
| namespace OpenTelemetry.Metrics | ||
| { | ||
| internal class LastValueAggregator : Aggregator | ||
| { | ||
| private readonly Instrument instrument; | ||
| private readonly KeyValuePair<string, object>[] tags; | ||
|
|
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| private readonly object lockUpdate = new object(); | ||
| private int count = 0; | ||
| private DataPoint lastDataPoint; | ||
|
|
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| internal LastValueAggregator(Instrument instrument, string[] names, object[] values) | ||
| { | ||
| this.instrument = instrument; | ||
|
|
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| if (names.Length != values.Length) | ||
| { | ||
| throw new ArgumentException($"Length of {nameof(names)} and {nameof(values)} must match."); | ||
| } | ||
|
|
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| this.tags = new KeyValuePair<string, object>[names.Length]; | ||
| for (int i = 0; i < names.Length; i++) | ||
| { | ||
| this.tags[i] = new KeyValuePair<string, object>(names[i], values[i]); | ||
| } | ||
| } | ||
|
|
||
| internal override void Update<T>(DateTimeOffset dt, T value) | ||
| where T : struct | ||
| { | ||
| lock (this.lockUpdate) | ||
| { | ||
| this.count++; | ||
| this.lastDataPoint = DataPoint.CreateDataPoint(dt, value, this.tags); | ||
| } | ||
| } | ||
|
|
||
| internal override IEnumerable<Metric> Collect() | ||
| { | ||
| // TODO: Need to determine how to convert to Metric | ||
|
|
||
| if (this.count == 0) | ||
| { | ||
| return Enumerable.Empty<Metric>(); | ||
| } | ||
|
|
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| DataPoint lastValue; | ||
| lock (this.lockUpdate) | ||
| { | ||
| lastValue = this.lastDataPoint; | ||
| this.count = 0; | ||
| } | ||
|
|
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| var metrics = new Metric[] | ||
| { | ||
| new Metric( | ||
| $"{this.instrument.Meter.Name}:{this.instrument.Name}:LastValue", | ||
| lastValue), | ||
| }; | ||
|
|
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| return metrics; | ||
| } | ||
| } | ||
| } |
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