Metrics interfaces (#127)

* first metrics

* added metrics

* implement default meter

* measures

* adderssed code review

* adderssed code review

* pascal case for enum

src/OpenTelemetry.Abstractions/Metrics/DefaultMeter.cs

@@ -0,0 +1,298 @@
+// <copyright file="DefaultMeter.cs" company="OpenTelemetry Authors">
+// Copyright 2018, 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>
+
+namespace OpenTelemetry.Metrics
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Net.NetworkInformation;
+    using OpenTelemetry.Metrics.Implementation;
+    using OpenTelemetry.Resources;
+    using OpenTelemetry.Tags;
+    using OpenTelemetry.Trace;
+
+    /// <summary>
+    /// No-op implementation of a meter interface.
+    /// </summary>
+    public class DefaultMeter : IMeter
+    {
+        private static CounterDoubleBuilder counterDoubleBuilder = new CounterDoubleBuilder();
+        private static CounterLongBuilder counterLongBuilder = new CounterLongBuilder();
+        private static GaugeDoubleBuilder gaugeDoubleBuilder = new GaugeDoubleBuilder();
+        private static GaugeLongBuilder gaugeLongBuilder = new GaugeLongBuilder();
+        private static MeasureBuilder measureBuilder = new MeasureBuilder();
+
+        /// <inheritdoc/>
+        public ICounterDoubleBuilder GetCounterDoubleBuilder(string name) => counterDoubleBuilder;
+
+        /// <inheritdoc/>
+        public ICounterLongBuilder GetCounterLongBuilder(string name) => counterLongBuilder;
+
+        /// <inheritdoc/>
+        public IGaugeDoubleBuilder GetGaugeDoubleBuilder(string name) => gaugeDoubleBuilder;
+
+        /// <inheritdoc/>
+        public IGaugeLongBuilder GetGaugeLongBuilder(string name) => gaugeLongBuilder;
+
+        /// <inheritdoc/>
+        public IMeasureBuilder GetMeasureBuilder(string name) => measureBuilder;
+
+        /// <inheritdoc/>
+        public void Record(IEnumerable<IMeasurement> measurements)
+        {
+        }
+
+        /// <inheritdoc/>
+        public void Record(IEnumerable<IMeasurement> measurements, ITagContext tagContext)
+        {
+        }
+
+        /// <inheritdoc/>
+        public void Record(IEnumerable<IMeasurement> measurements, ITagContext tagContext, SpanContext spanContext)
+        {
+        }
+
+        private class CounterDoubleTimeSeries : ICounterDoubleTimeSeries
+        {
+            public void Add(double delta)
+            {
+            }
+
+            public void Set(double val)
+            {
+            }
+        }
+
+        private class CounterDouble : ICounterDouble
+        {
+            private static CounterDoubleTimeSeries timeSeries = new CounterDoubleTimeSeries();
+
+            public void Clear()
+            {
+            }
+
+            public ICounterDoubleTimeSeries GetDefaultTimeSeries() => timeSeries;
+
+            public ICounterDoubleTimeSeries GetOrCreateTimeSeries(IEnumerable<string> labelValues) => timeSeries;
+
+            public void RemoveTimeSeries(IEnumerable<string> labelValues)
+            {
+            }
+
+            public void SetCallback(Action metricUpdater)
+            {
+            }
+        }
+
+        private class CounterDoubleBuilder : ICounterDoubleBuilder
+        {
+            private static CounterDouble counterDouble = new CounterDouble();
+
+            public IMetric<ICounterDoubleTimeSeries> Build() => counterDouble;
+
+            public IMetricBuilder<ICounterDoubleTimeSeries> SetComponent(string component) => this;
+
+            public IMetricBuilder<ICounterDoubleTimeSeries> SetConstantLabels(IDictionary<LabelKey, string> constantLabels) => this;
+
+            public IMetricBuilder<ICounterDoubleTimeSeries> SetDescription(string description) => this;
+
+            public IMetricBuilder<ICounterDoubleTimeSeries> SetLabelKeys(IEnumerable<LabelKey> labelKeys) => this;
+
+            public IMetricBuilder<ICounterDoubleTimeSeries> SetResource(Resource resource) => this;
+
+            public IMetricBuilder<ICounterDoubleTimeSeries> SetUnit(string unit) => this;
+        }
+
+        private class CounterLongTimeSeries : ICounterLongTimeSeries
+        {
+            public void Add(long delta)
+            {
+            }
+
+            public void Set(long val)
+            {
+            }
+        }
+
+        private class CounterLong : ICounterLong
+        {
+            private static CounterLongTimeSeries timeSeries = new CounterLongTimeSeries();
+
+            public void Clear()
+            {
+            }
+
+            public ICounterLongTimeSeries GetDefaultTimeSeries() => timeSeries;
+
+            public ICounterLongTimeSeries GetOrCreateTimeSeries(IEnumerable<string> labelValues) => timeSeries;
+
+            public void RemoveTimeSeries(IEnumerable<string> labelValues)
+            {
+            }
+
+            public void SetCallback(Action metricUpdater)
+            {
+            }
+        }
+
+        private class CounterLongBuilder : ICounterLongBuilder
+        {
+            private static CounterLong counterLong = new CounterLong();
+
+            public IMetric<ICounterLongTimeSeries> Build() => counterLong;
+
+            public IMetricBuilder<ICounterLongTimeSeries> SetComponent(string component) => this;
+
+            public IMetricBuilder<ICounterLongTimeSeries> SetConstantLabels(IDictionary<LabelKey, string> constantLabels) => this;
+
+            public IMetricBuilder<ICounterLongTimeSeries> SetDescription(string description) => this;
+
+            public IMetricBuilder<ICounterLongTimeSeries> SetLabelKeys(IEnumerable<LabelKey> labelKeys) => this;
+
+            public IMetricBuilder<ICounterLongTimeSeries> SetResource(Resource resource) => this;
+
+            public IMetricBuilder<ICounterLongTimeSeries> SetUnit(string unit) => this;
+        }
+
+        private class GaugeDoubleTimeSeries : IGaugeDoubleTimeSeries
+        {
+            public void Add(double delta)
+            {
+            }
+
+            public void Set(double val)
+            {
+            }
+        }
+
+        private class GaugeDouble : IGaugeDouble
+        {
+            private static GaugeDoubleTimeSeries timeSeries = new GaugeDoubleTimeSeries();
+
+            public void Clear()
+            {
+            }
+
+            public IGaugeDoubleTimeSeries GetDefaultTimeSeries() => timeSeries;
+
+            public IGaugeDoubleTimeSeries GetOrCreateTimeSeries(IEnumerable<string> labelValues) => timeSeries;
+
+            public void RemoveTimeSeries(IEnumerable<string> labelValues)
+            {
+            }
+
+            public void SetCallback(Action metricUpdater)
+            {
+            }
+        }
+
+        private class GaugeDoubleBuilder : IGaugeDoubleBuilder
+        {
+            private static GaugeDouble gaugeDouble = new GaugeDouble();
+
+            public IMetric<IGaugeDoubleTimeSeries> Build() => gaugeDouble;
+
+            public IMetricBuilder<IGaugeDoubleTimeSeries> SetComponent(string component) => this;
+
+            public IMetricBuilder<IGaugeDoubleTimeSeries> SetConstantLabels(IDictionary<LabelKey, string> constantLabels) => this;
+
+            public IMetricBuilder<IGaugeDoubleTimeSeries> SetDescription(string description) => this;
+
+            public IMetricBuilder<IGaugeDoubleTimeSeries> SetLabelKeys(IEnumerable<LabelKey> labelKeys) => this;
+
+            public IMetricBuilder<IGaugeDoubleTimeSeries> SetResource(Resource resource) => this;
+
+            public IMetricBuilder<IGaugeDoubleTimeSeries> SetUnit(string unit) => this;
+        }
+
+        private class GaugeLongTimeSeries : IGaugeLongTimeSeries
+        {
+            public void Add(long delta)
+            {
+            }
+
+            public void Set(long val)
+            {
+            }
+        }
+
+        private class GaugeLong : IGaugeLong
+        {
+            private static GaugeLongTimeSeries timeSeries = new GaugeLongTimeSeries();
+
+            public void Clear()
+            {
+            }
+
+            public IGaugeLongTimeSeries GetDefaultTimeSeries() => timeSeries;
+
+            public IGaugeLongTimeSeries GetOrCreateTimeSeries(IEnumerable<string> labelValues) => timeSeries;
+
+            public void RemoveTimeSeries(IEnumerable<string> labelValues)
+            {
+            }
+
+            public void SetCallback(Action metricUpdater)
+            {
+            }
+        }
+
+        private class GaugeLongBuilder : IGaugeLongBuilder
+        {
+            private static GaugeLong counterLong = new GaugeLong();
+
+            public IMetric<IGaugeLongTimeSeries> Build() => counterLong;
+
+            public IMetricBuilder<IGaugeLongTimeSeries> SetComponent(string component) => this;
+
+            public IMetricBuilder<IGaugeLongTimeSeries> SetConstantLabels(IDictionary<LabelKey, string> constantLabels) => this;
+
+            public IMetricBuilder<IGaugeLongTimeSeries> SetDescription(string description) => this;
+
+            public IMetricBuilder<IGaugeLongTimeSeries> SetLabelKeys(IEnumerable<LabelKey> labelKeys) => this;
+
+            public IMetricBuilder<IGaugeLongTimeSeries> SetResource(Resource resource) => this;
+
+            public IMetricBuilder<IGaugeLongTimeSeries> SetUnit(string unit) => this;
+        }
+
+        private class Measurement : IMeasurement
+        {
+        }
+
+        private class Measure : IMeasure
+        {
+            private static IMeasurement measurement = new Measurement();
+
+            public IMeasurement CreateDoubleMeasurement(double value) => measurement;
+
+            public IMeasurement CreateLongMeasurement(long value) => measurement;
+        }
+
+        private class MeasureBuilder : IMeasureBuilder
+        {
+            private static Measure measure = new Measure();
+
+            public IMeasure Build() => measure;
+
+            public IMeasureBuilder SetDescription(string description) => this;
+
+            public IMeasureBuilder SetType(MeasureType type) => this;
+
+            public IMeasureBuilder SetUnit(string unit) => this;
+        }
+    }
+}

src/OpenTelemetry.Abstractions/Metrics/ICounterDouble.cs

@@ -0,0 +1,28 @@
+// <copyright file="ICounterDouble.cs" company="OpenTelemetry Authors">
+// Copyright 2018, 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>
+
+namespace OpenTelemetry.Metrics
+{
+    using OpenTelemetry.Metrics.Implementation;
+
+    /// <summary>
+    /// Counter metric, to report instantaneous measurement of a double value. Cumulative values can go
+    /// up or stay the same, but can never go down.Cumulative values cannot be negative.
+    /// </summary>
+    public interface ICounterDouble : IMetric<ICounterDoubleTimeSeries>
+    {
+    }
+}

src/OpenTelemetry.Abstractions/Metrics/ICounterLong.cs

@@ -0,0 +1,28 @@
+// <copyright file="ICounterLong.cs" company="OpenTelemetry Authors">
+// Copyright 2018, 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>
+
+namespace OpenTelemetry.Metrics
+{
+    using OpenTelemetry.Metrics.Implementation;
+
+    /// <summary>
+    /// Counter metric, to report instantaneous measurement of a double value. Cumulative values can go
+    /// up or stay the same, but can never go down.Cumulative values cannot be negative.
+    /// </summary>
+    public interface ICounterLong : IMetric<ICounterLongTimeSeries>
+    {
+    }
+}

src/OpenTelemetry.Abstractions/Metrics/IGaugeDouble.cs

@@ -0,0 +1,28 @@
+// <copyright file="IGaugeDouble.cs" company="OpenTelemetry Authors">
+// Copyright 2018, 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>
+
+namespace OpenTelemetry.Metrics
+{
+    using OpenTelemetry.Metrics.Implementation;
+
+    /// <summary>
+    /// Gauge metric, to report instantaneous measurement of a double value. Cumulative values can go
+    /// up or down.
+    /// </summary>
+    public interface IGaugeDouble : IMetric<IGaugeDoubleTimeSeries>
+    {
+    }
+}