add metrics to sdk (#133)

* add metrics to sdk

* metrics for sends and receives

* format

src/Speckle.Sdk/Api/Operations/Operations.Receive.cs

@@ -37,6 +37,7 @@ public partial class Operations
   )
   {
     using var receiveActivity = activityFactory.Start("Operations.Receive");
+    metricsFactory.CreateCounter<long>("Receive").Add(1);
 
     if (remoteTransport != null)
     {

src/Speckle.Sdk/Api/Operations/Operations.Send.cs

@@ -78,6 +78,7 @@ public partial class Operations
     }
 
     // make sure all logs in the operation have the proper context
+    metricsFactory.CreateCounter<long>("Send").Add(1);
     using var activity = activityFactory.Start();
     activity?.SetTag("correlationId", Guid.NewGuid().ToString());
     {

src/Speckle.Sdk/Api/Operations/Operations.cs

@@ -10,4 +10,8 @@ namespace Speckle.Sdk.Api;
 /// <para>Push/Pull (methods to serialize and send data to one or more servers)</para>
 /// </summary>
 [GenerateAutoInterface]
-public partial class Operations(ILogger<Operations> logger, ISdkActivityFactory activityFactory) : IOperations;
+public partial class Operations(
+  ILogger<Operations> logger,
+  ISdkActivityFactory activityFactory,
+  ISdkMetricsFactory metricsFactory
+) : IOperations;

src/Speckle.Sdk/Logging/ISdkActivityFactory.cs

@@ -6,10 +6,3 @@ public interface ISdkActivityFactory : IDisposable
 {
   ISdkActivity? Start(string? name = default, [CallerMemberName] string source = "");
 }
-
-public sealed class NullActivityFactory : ISdkActivityFactory
-{
-  public void Dispose() { }
-
-  public ISdkActivity? Start(string? name = default, string source = "") => null;
-}

src/Speckle.Sdk/Logging/ISdkCounter.cs

@@ -0,0 +1,16 @@
+namespace Speckle.Sdk.Logging;
+
+public interface ISdkCounter<T>
+  where T : struct
+{
+  void Add(T value);
+  void Add(T value, KeyValuePair<string, object?> tag);
+  void Add(T value, KeyValuePair<string, object?> tag1, KeyValuePair<string, object?> tag2);
+  void Add(
+    T value,
+    KeyValuePair<string, object?> tag1,
+    KeyValuePair<string, object?> tag2,
+    KeyValuePair<string, object?> tag3
+  );
+  void Add(T value, params KeyValuePair<string, object?>[] tag);
+}

src/Speckle.Sdk/Logging/ISdkMetricsFactory.cs

@@ -0,0 +1,7 @@
+namespace Speckle.Sdk.Logging;
+
+public interface ISdkMetricsFactory
+{
+  ISdkCounter<T> CreateCounter<T>(string name, string? unit = default, string? description = default)
+    where T : struct;
+}

src/Speckle.Sdk/Logging/NullActivityFactory.cs

@@ -0,0 +1,8 @@
+namespace Speckle.Sdk.Logging;
+
+public sealed class NullActivityFactory : ISdkActivityFactory
+{
+  public void Dispose() { }
+
+  public ISdkActivity? Start(string? name = default, string source = "") => null;
+}

src/Speckle.Sdk/Logging/NullSdkCounter.cs

@@ -0,0 +1,20 @@
+namespace Speckle.Sdk.Logging;
+
+public sealed class NullSdkCounter<T> : ISdkCounter<T>
+  where T : struct
+{
+  public void Add(T value) { }
+
+  public void Add(T value, KeyValuePair<string, object?> tag) { }
+
+  public void Add(T value, KeyValuePair<string, object?> tag1, KeyValuePair<string, object?> tag2) { }
+
+  public void Add(
+    T value,
+    KeyValuePair<string, object?> tag1,
+    KeyValuePair<string, object?> tag2,
+    KeyValuePair<string, object?> tag3
+  ) { }
+
+  public void Add(T value, params KeyValuePair<string, object?>[] tag) { }
+}

src/Speckle.Sdk/Logging/NullSdkMetricsFactory.cs

@@ -0,0 +1,7 @@
+namespace Speckle.Sdk.Logging;
+
+public sealed class NullSdkMetricsFactory : ISdkMetricsFactory
+{
+  public ISdkCounter<T> CreateCounter<T>(string name, string? unit = default, string? description = default)
+    where T : struct => new NullSdkCounter<T>();
+}

src/Speckle.Sdk/ServiceRegistration.cs

@@ -27,7 +27,8 @@ public static class ServiceRegistration
         Slug = application.Slug,
       }
     );
-    serviceCollection.AddSingleton<ISdkActivityFactory, NullActivityFactory>();
+    serviceCollection.TryAddSingleton<ISdkActivityFactory, NullActivityFactory>();
+    serviceCollection.TryAddSingleton<ISdkMetricsFactory, NullSdkMetricsFactory>();
     serviceCollection.AddMatchingInterfacesAsTransient(Assembly.GetExecutingAssembly());
     return serviceCollection;
   }