Add otel protocol

src/Temporalio/Bridge/OptionsExtensions.cs

@@ -85,6 +85,17 @@ public static unsafe Interop.OpenTelemetryOptions ToInteropOptions(
                 default:
                     throw new ArgumentException("Unrecognized temporality");
             }
+            switch (options.Protocol)
+            {
+                case Temporalio.Runtime.OpenTelemetryProtocol.Grpc:
+                    temporality = Interop.OpenTelemetryProtocol.Grpc;
+                    break;
+                case Temporalio.Runtime.OpenTelemetryProtocol.Http:
+                    temporality = Interop.OpenTelemetryProtocol.Http;
+                    break;
+                default:
+                    throw new ArgumentException("Unrecognized protocol");
+            }
             return new Interop.OpenTelemetryOptions()
             {
                 url = scope.ByteArray(options.Url.ToString()),

src/Temporalio/Bridge/include/temporal-sdk-bridge.h

@@ -34,6 +34,11 @@ typedef enum OpenTelemetryMetricTemporality {
   Delta,
 } OpenTelemetryMetricTemporality;
 
+typedef enum OpenTelemetryProtocol {
+  Grpc = 1,
+  Http,
+} OpenTelemetryProtocol;
+
 typedef enum RpcService {
   Workflow = 1,
   Operator,
@@ -217,6 +222,7 @@ typedef struct OpenTelemetryOptions {
   uint32_t metric_periodicity_millis;
   enum OpenTelemetryMetricTemporality metric_temporality;
   bool durations_as_seconds;
+  enum OpenTelemetryProtocol protocol;
 } OpenTelemetryOptions;
 
 typedef struct PrometheusOptions {

src/Temporalio/Bridge/src/runtime.rs

@@ -84,6 +84,7 @@ pub struct OpenTelemetryOptions {
     metric_periodicity_millis: u32,
     metric_temporality: OpenTelemetryMetricTemporality,
     durations_as_seconds: bool,
+    protocol: OpenTelemetryProtocol,
 }
 
 #[repr(C)]
@@ -92,6 +93,12 @@ pub enum OpenTelemetryMetricTemporality {
     Delta,
 }
 
+#[repr(C)]
+pub enum OpenTelemetryProtocol {
+    Grpc = 1,
+    Http,
+}
+
 #[repr(C)]
 pub struct PrometheusOptions {
     bind_address: ByteArrayRef,

src/Temporalio/Runtime/OpenTelemetryMetricTemporality.cs

@@ -1,7 +1,7 @@
 namespace Temporalio.Runtime
 {
     /// <summary>
-    /// Temporality for OpenTelemetrry metrics.
+    /// Temporality for OpenTelemetry metrics.
     /// </summary>
     public enum OpenTelemetryMetricTemporality
     {
@@ -15,4 +15,4 @@ public enum OpenTelemetryMetricTemporality
         /// </summary>
         Delta,
     }
-}
+}

src/Temporalio/Runtime/OpenTelemetryOptions.cs

@@ -57,6 +57,11 @@ public OpenTelemetryOptions(string url)
         /// </summary>
         public bool UseSecondsForDuration { get; set; }
 
+        /// <summary>
+        /// Gets or sets the protocol to use for the OpenTelemetry collector.
+        /// </summary>
+        public OpenTelemetryProtocol Protocol { get; set; } = OpenTelemetryProtocol.Grpc;
+
         /// <summary>
         /// Create a shallow copy of these options.
         /// </summary>

src/Temporalio/Runtime/OpenTelemetryProtocol.cs

@@ -0,0 +1,18 @@
+namespace Temporalio.Runtime
+{
+    /// <summary>
+    /// Protocol for OpenTelemetry metrics.
+    /// </summary>
+    public enum OpenTelemetryProtocol
+    {
+        /// <summary>
+        /// Grpc.
+        /// </summary>
+        Grpc,
+
+        /// <summary>
+        /// Http.
+        /// </summary>
+        Http,
+    }
+}