Update fields structure in protobuf file for RetryOptions and ConfigSource

src/WebJobs.Script.Grpc/Channel/GrpcWorkerChannel.cs

@@ -522,8 +522,15 @@ internal void ProcessFunctionMetadataResponses(FunctionMetadataResponses functio
                     {
                         Metadata = functionMetadata,
                         Bindings = bindings,
-                        RetryOptions = metadata.RetryOptions,
-                        ConfigurationSource = metadata.ConfigSource
+                        RetryOptions = new Description.RetryOptions()
+                        {
+                            Strategy = metadata.RetryOptions == null ? Description.RetryStrategy.ExponentialBackoff : (Description.RetryStrategy)Enum.Parse(typeof(Description.RetryStrategy), metadata.RetryOptions.Strategy.ToString(), true),
+                            MaxRetryCount = metadata.RetryOptions?.MaxRetryCount,
+                            DelayInterval = metadata.RetryOptions?.DelayInterval.ToTimeSpan(),
+                            MaximumInterval = metadata.RetryOptions?.MaximumInterval.ToTimeSpan(),
+                            MinimumInterval = metadata.RetryOptions?.MinimumInterval.ToTimeSpan()
+                        },
+                        ConfigurationSource = (Description.ConfigurationSource)Enum.Parse(typeof(Description.ConfigurationSource), metadata.ConfigSource.ToString(), true),
                     });
                 }
             }

src/WebJobs.Script.Grpc/azure-functions-language-worker-protobuf/src/proto/FunctionRpc.proto

@@ -274,11 +274,11 @@ message RpcFunctionMetadata {
   // Raw binding info
   repeated string raw_bindings = 10;
 
-  // Retry Options: string representation of JObject retry options (maxRetryCount, intervals, etc.)
-  string retry_options = 11;
+  // Retry Options
+  RetryOptions retry_options = 11;
 
-  // Configuration Source: string representation of JToken configuration source property in function metadata
-  string config_source = 12;
+  // Configuration Source
+  ConfigurationSource config_source = 12;
 }
 
 // Host tells worker it is ready to receive metadata
@@ -341,6 +341,42 @@ message RetryContext {
   RpcException exception = 3;
 }
 
+// Host retry options
+message RetryOptions {
+  // Retry strategy
+  RetryStrategy strategy = 1;
+
+  // Maximum retry count
+  int32 maxRetryCount = 2 ;
+
+  // Delay interval
+  google.protobuf.Duration delayInterval = 3;
+
+  // Minimum interval
+  google.protobuf.Duration minimumInterval = 4;
+
+  // Maximum interval
+  google.protobuf.Duration maximumInterval = 5;
+}
+
+// Host retry strategy
+enum RetryStrategy {
+  // Exponential Backoff
+  ExponentialBackoff = 0;
+
+  // Fixed Delay
+  FixedDelay = 1;
+}
+
+// Host configuration source
+enum ConfigurationSource {
+  // configuration source is Attributes
+  Attributes = 0;
+
+  // configuration source is config
+  Config = 1;
+}
+
 // Host requests worker to cancel invocation
 message InvocationCancel {
   // Unique id for invocation

src/WebJobs.Script/Description/Workers/Rpc/ConfigurationSource.cs

@@ -0,0 +1,13 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
+
+namespace Microsoft.Azure.WebJobs.Script.Description
+{
+    public enum ConfigurationSource
+    {
+        Attributes = 0,
+        Config = 1
+    }
+}

src/WebJobs.Script/Description/Workers/Rpc/RawFunctionMetadata.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
 using System.Collections.Generic;
+using Azure.Core;
 using Newtonsoft.Json.Linq;
 
 namespace Microsoft.Azure.WebJobs.Script.Description
@@ -12,8 +13,8 @@ public class RawFunctionMetadata
 
         public IEnumerable<string> Bindings { get; set; }
 
-        public string RetryOptions { get; set; }
+        public RetryOptions RetryOptions { get; set; }
 
-        public string ConfigurationSource { get; set; }
+        public ConfigurationSource ConfigurationSource { get; set; }
     }
 }

src/WebJobs.Script/Host/WorkerFunctionMetadataProvider.cs

@@ -81,10 +81,9 @@ internal IEnumerable<FunctionMetadata> ValidateMetadata(IEnumerable<RawFunctionM
                     // skip function ScriptFile validation for now because this involves enumerating file directory
 
                     // configuration source validation
-                    if (!string.IsNullOrEmpty(rawFunction.ConfigurationSource))
+                    if (!string.IsNullOrEmpty(rawFunction.ConfigurationSource.ToString()))
                     {
-                        JToken isDirect = JToken.Parse(rawFunction.ConfigurationSource);
-                        var isDirectValue = isDirect?.ToString();
+                        var isDirectValue = rawFunction.ConfigurationSource.ToString();
                         if (string.Equals(isDirectValue, "attributes", StringComparison.OrdinalIgnoreCase))
                         {
                             function.SetIsDirect(true);
@@ -96,11 +95,8 @@ internal IEnumerable<FunctionMetadata> ValidateMetadata(IEnumerable<RawFunctionM
                     }
 
                     // retry option validation
-                    if (!string.IsNullOrEmpty(rawFunction.RetryOptions))
-                    {
-                        function.Retry = JObject.Parse(rawFunction.RetryOptions).ToObject<RetryOptions>();
-                        Utility.ValidateRetryOptions(function.Retry);
-                    }
+                    function.Retry = rawFunction.RetryOptions;
+                    Utility.ValidateRetryOptions(function.Retry);
 
                     // binding validation
                     function = ValidateBindings(rawFunction.Bindings, function);