Finish Hello World ASP.NET sample project

src/modules/Elsa.Http/Activities/WriteHttpResponse.cs

@@ -5,12 +5,25 @@ using Microsoft.AspNetCore.Http;
 
 namespace Elsa.Http;
 
-[Activity("Elsa", "HTTP", "Write an HTTP response.", DisplayName = "HTTP Response")]
+/// <summary>
+/// Write a response to the current HTTP response object.
+/// </summary>
+[Activity("Elsa", "HTTP", "Write a response to the current HTTP response object.", DisplayName = "HTTP Response")]
 public class WriteHttpResponse : Activity
 {
+    /// <summary>
+    /// The status code to return.
+    /// </summary>
+    [Input(DefaultValue = HttpStatusCode.OK, Description = "The status code to return.")]
     public Input<HttpStatusCode> StatusCode { get; set; } = new(HttpStatusCode.OK);
+
+    /// <summary>
+    /// The content to write back.
+    /// </summary>
+    [Input(Description = "The content to write back.")]
     public Input<string?> Content { get; set; } = new("");
 
+    /// <inheritdoc />
     protected override async ValueTask ExecuteAsync(ActivityExecutionContext context)
     {
         var httpContextAccessor = context.GetRequiredService<IHttpContextAccessor>();
@@ -18,13 +31,13 @@ public class WriteHttpResponse : Activity
 
         if (httpContext == null)
         {
-            // We're executing in a non-HTTP context (like in a virtual actor).
-            // Create a bookmark to allow the invoker to get the export state and resume execution from there.
+            // We're executing in a non-HTTP context (e.g. in a virtual actor).
+            // Create a bookmark to allow the invoker to export the state and resume execution from there.
 
             context.CreateBookmark(OnResumeAsync);
             return;
         }
-        
+
         var response = httpContext.Response;
 
         response.StatusCode = (int)context.Get(StatusCode);
@@ -45,7 +58,7 @@ public class WriteHttpResponse : Activity
             // We're not in an HTTP context, so let's fail.
             throw new Exception("Cannot execute in a non-HTTP context");
         }
-        
+
         var response = httpContext.Response;
 
         response.StatusCode = (int)context.Get(StatusCode);

src/samples/aspnet/Elsa.Samples.HelloWorld/HelloWorldHttpWorkflow.cs

@@ -0,0 +1,30 @@
+using System.Net;
+using Elsa.Http;
+using Elsa.Workflows.Core.Activities;
+using Elsa.Workflows.Core.Services;
+
+namespace Elsa.Samples.HelloWorld;
+
+public class HelloWorldHttpWorkflow : WorkflowBase
+{
+    protected override void Build(IWorkflowBuilder builder)
+    {
+        builder.Root = new Sequence
+        {
+            Activities =
+            {
+                new HttpEndpoint
+                {
+                    Path = new("/hello-world"),
+                    SupportedMethods = new(new[] { HttpMethods.Get }),
+                    CanStartWorkflow = true
+                },
+                new WriteHttpResponse
+                {
+                    StatusCode = new(HttpStatusCode.OK),
+                    Content = new("Hello world!")
+                }
+            }
+        };
+    }
+}

src/samples/aspnet/Elsa.Samples.HelloWorld/Program.cs

@@ -1,14 +1,19 @@
 using Elsa.Extensions;
 using Elsa.Http.Extensions;
-using Elsa.Workflows.Management.Extensions;
+using Elsa.Samples.HelloWorld;
+using Elsa.Workflows.Runtime.Extensions;
 
 var builder = WebApplication.CreateBuilder(args);
 var services = builder.Services;
 
 // Add Elsa services.
 services.AddElsa(elsa => elsa
-            
-    .UseWorkflowManagement()
+    // Configure the workflow runtime.
+    .UseWorkflowRuntime(runtime =>
+    {
+        // Register our HTTP workflow with the runtime.
+        runtime.AddWorkflow<HelloWorldHttpWorkflow>();
+    })
         
     // Enable Elsa HTTP module (for HTTP related activities). 
     .UseHttp()