Added workflow example: Fan out/fan in

Directory.Packages.props

@@ -1,51 +1,52 @@
 <Project>
-  <PropertyGroup>
-    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
-    <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
-  </PropertyGroup>
-  <ItemGroup>
-    <PackageVersion Include="BenchmarkDotNet" Version="0.14.0" />
-    <PackageVersion Include="coverlet.collector" Version="6.0.2" />
-    <PackageVersion Include="coverlet.msbuild" Version="6.0.2" />
-    <PackageVersion Include="FluentAssertions" Version="5.9.0" />
-    <PackageVersion Include="GitHubActionsTestLogger" Version="1.1.2" />
-    <PackageVersion Include="Google.Api.CommonProtos" Version="2.2.0" />
-    <PackageVersion Include="Google.Protobuf" Version="3.28.2" />
-    <PackageVersion Include="Grpc.AspNetCore" Version="2.66.0" />
-    <PackageVersion Include="Grpc.Core.Testing" Version="2.46.6" />
-    <PackageVersion Include="Grpc.Net.Client" Version="2.66.0" />
-    <PackageVersion Include="Grpc.Net.ClientFactory" Version="2.66.0" />
-    <PackageVersion Include="Grpc.Tools" Version="2.67.0" />
-    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="6.0.35" />
-    <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="6.0.35" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.4" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.8.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing" Version="1.1.2" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.8.0" />
-    <PackageVersion Include="Microsoft.DurableTask.Client.Grpc" Version="1.3.0" />
-    <PackageVersion Include="Microsoft.DurableTask.Worker.Grpc" Version="1.3.0" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration" Version="6.0.1" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="6.0.0" />
-    <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="6.0.1" />
-    <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
-    <PackageVersion Include="Microsoft.Extensions.Http" Version="6.0.0" />
-    <PackageVersion Include="Microsoft.Extensions.Logging" Version="6.0.0" />
-    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
-    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="1.1.1" />
-    <PackageVersion Include="MinVer" Version="2.3.0" />
-    <PackageVersion Include="Moq" Version="4.20.72" />
-    <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageVersion Include="protobuf-net.Grpc.AspNetCore" Version="1.2.2" />
-    <PackageVersion Include="Serilog.AspNetCore" Version="6.1.0" />
-    <PackageVersion Include="Serilog.Sinks.Console" Version="4.1.0" />
-    <PackageVersion Include="Serilog.Sinks.File" Version="5.0.0" />
-    <PackageVersion Include="System.Formats.Asn1" Version="6.0.1" />
-    <PackageVersion Include="System.Text.Json" Version="8.0.5" />
-    <PackageVersion Include="xunit" Version="2.9.2" />
-    <PackageVersion Include="xunit.extensibility.core" Version="2.9.2" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
-  </ItemGroup>
+    <PropertyGroup>
+        <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+        <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
+    </PropertyGroup>
+    <ItemGroup>
+        <PackageVersion Include="BenchmarkDotNet" Version="0.14.0" />
+        <PackageVersion Include="coverlet.collector" Version="6.0.2" />
+        <PackageVersion Include="coverlet.msbuild" Version="6.0.2" />
+        <PackageVersion Include="FluentAssertions" Version="5.9.0" />
+        <PackageVersion Include="GitHubActionsTestLogger" Version="1.1.2" />
+        <PackageVersion Include="Google.Api.CommonProtos" Version="2.2.0" />
+        <PackageVersion Include="Google.Protobuf" Version="3.28.2" />
+        <PackageVersion Include="Grpc.AspNetCore" Version="2.66.0" />
+        <PackageVersion Include="Grpc.Core.Testing" Version="2.46.6" />
+        <PackageVersion Include="Grpc.Net.Client" Version="2.66.0" />
+        <PackageVersion Include="Grpc.Net.ClientFactory" Version="2.66.0" />
+        <PackageVersion Include="Grpc.Tools" Version="2.67.0" />
+        <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="6.0.35" />
+        <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="6.0.35" />
+        <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.4" />
+        <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.8.0" />
+        <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
+        <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing" Version="1.1.2" />
+        <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2" />
+        <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.8.0" />
+        <PackageVersion Include="Microsoft.DurableTask.Client.Grpc" Version="1.3.0" />
+        <PackageVersion Include="Microsoft.DurableTask.Worker.Grpc" Version="1.3.0" />
+        <PackageVersion Include="Microsoft.Extensions.Configuration" Version="6.0.1" />
+        <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="6.0.0" />
+        <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="6.0.1" />
+        <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
+        <PackageVersion Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
+        <PackageVersion Include="Microsoft.Extensions.Http" Version="6.0.0" />
+        <PackageVersion Include="Microsoft.Extensions.Logging" Version="6.0.0" />
+        <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.4" />
+        <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
+        <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="1.1.1" />
+        <PackageVersion Include="MinVer" Version="2.3.0" />
+        <PackageVersion Include="Moq" Version="4.20.72" />
+        <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
+        <PackageVersion Include="protobuf-net.Grpc.AspNetCore" Version="1.2.2" />
+        <PackageVersion Include="Serilog.AspNetCore" Version="6.1.0" />
+        <PackageVersion Include="Serilog.Sinks.Console" Version="4.1.0" />
+        <PackageVersion Include="Serilog.Sinks.File" Version="5.0.0" />
+        <PackageVersion Include="System.Formats.Asn1" Version="6.0.1" />
+        <PackageVersion Include="System.Text.Json" Version="6.0.10" />
+        <PackageVersion Include="xunit" Version="2.9.2" />
+        <PackageVersion Include="xunit.extensibility.core" Version="2.9.2" />
+        <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
+    </ItemGroup>
 </Project>

all.sln

@@ -119,6 +119,7 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dapr.Common", "src\Dapr.Com
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dapr.Common.Test", "test\Dapr.Common.Test\Dapr.Common.Test.csproj", "{CDB47863-BEBD-4841-A807-46D868962521}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WorkflowFanOutFanIn", "examples\Workflow\WorkflowFanOutFanIn\WorkflowFanOutFanIn.csproj", "{D83B27F3-4401-42F5-843E-147566B4999A}"
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dapr.Jobs", "src\Dapr.Jobs\Dapr.Jobs.csproj", "{C8BB6A85-A7EA-40C0-893D-F36F317829B3}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dapr.Jobs.Test", "test\Dapr.Jobs.Test\Dapr.Jobs.Test.csproj", "{BF9828E9-5597-4D42-AA6E-6E6C12214204}"
@@ -311,6 +312,10 @@ Global
 		{CDB47863-BEBD-4841-A807-46D868962521}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{CDB47863-BEBD-4841-A807-46D868962521}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{CDB47863-BEBD-4841-A807-46D868962521}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D83B27F3-4401-42F5-843E-147566B4999A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D83B27F3-4401-42F5-843E-147566B4999A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D83B27F3-4401-42F5-843E-147566B4999A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D83B27F3-4401-42F5-843E-147566B4999A}.Release|Any CPU.Build.0 = Release|Any CPU
 		{C8BB6A85-A7EA-40C0-893D-F36F317829B3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{C8BB6A85-A7EA-40C0-893D-F36F317829B3}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C8BB6A85-A7EA-40C0-893D-F36F317829B3}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -379,6 +384,7 @@ Global
 		{DFBABB04-50E9-42F6-B470-310E1B545638} = {27C5D71D-0721-4221-9286-B94AB07B58CF}
 		{B445B19C-A925-4873-8CB7-8317898B6970} = {27C5D71D-0721-4221-9286-B94AB07B58CF}
 		{CDB47863-BEBD-4841-A807-46D868962521} = {DD020B34-460F-455F-8D17-CF4A949F100B}
+		{D83B27F3-4401-42F5-843E-147566B4999A} = {BF3ED6BF-ADF3-4D25-8E89-02FB8D945CA9}
 		{C8BB6A85-A7EA-40C0-893D-F36F317829B3} = {27C5D71D-0721-4221-9286-B94AB07B58CF}
 		{BF9828E9-5597-4D42-AA6E-6E6C12214204} = {DD020B34-460F-455F-8D17-CF4A949F100B}
 		{D9697361-232F-465D-A136-4561E0E88488} = {D687DDC4-66C5-4667-9E3A-FD8B78ECAA78}

examples/Workflow/WorkflowFanOutFanIn/Activities/NotifyActivity.cs

@@ -0,0 +1,31 @@
+// ------------------------------------------------------------------------
+// Copyright 2024 The Dapr 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.
+// ------------------------------------------------------------------------
+
+using Dapr.Workflow;
+
+namespace WorkflowFanOutFanIn.Activities;
+
+internal sealed class NotifyActivity : WorkflowActivity<string, object?>
+{
+    /// <summary>
+    /// Override to implement async (non-blocking) workflow activity logic.
+    /// </summary>
+    /// <param name="context">Provides access to additional context for the current activity execution.</param>
+    /// <param name="input">The deserialized activity input.</param>
+    /// <returns>The output of the activity as a task.</returns>
+    public override Task<object?> RunAsync(WorkflowActivityContext context, string input)
+    {
+        Console.WriteLine(input);
+        return Task.FromResult<object?>(null);
+    }
+}

examples/Workflow/WorkflowFanOutFanIn/Program.cs

@@ -0,0 +1,40 @@
+// ------------------------------------------------------------------------
+// Copyright 2024 The Dapr 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.
+// ------------------------------------------------------------------------
+
+using Dapr.Workflow;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using WorkflowFanOutFanIn.Activities;
+using WorkflowFanOutFanIn.Workflows;
+
+var builder = Host.CreateDefaultBuilder(args).ConfigureServices(services =>
+{
+    services.AddDaprWorkflow(options =>
+    {
+        options.RegisterWorkflow<DemoWorkflow>();
+        options.RegisterActivity<NotifyActivity>();
+    });
+});
+
+var host = builder.Build();
+await host.StartAsync();
+
+await using var scope = host.Services.CreateAsyncScope();
+var daprWorkflowClient = scope.ServiceProvider.GetRequiredService<DaprWorkflowClient>();
+
+var instanceId = $"workflow-demo-{Guid.NewGuid().ToString()[..8]}";
+await daprWorkflowClient.ScheduleNewWorkflowAsync(nameof(DemoWorkflow), instanceId, "test input");
+
+await daprWorkflowClient.WaitForWorkflowCompletionAsync(instanceId);
+var state = await daprWorkflowClient.GetWorkflowStateAsync(instanceId);
+Console.WriteLine($"Workflow state: {state.RuntimeStatus}");

examples/Workflow/WorkflowFanOutFanIn/WorkflowFanOutFanIn.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\..\..\src\Dapr.Workflow\Dapr.Workflow.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.Extensions.Hosting" />
+    </ItemGroup>
+
+</Project>

examples/Workflow/WorkflowFanOutFanIn/Workflows/DemoWorkflow.cs

@@ -0,0 +1,40 @@
+// ------------------------------------------------------------------------
+// Copyright 2024 The Dapr 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.
+// ------------------------------------------------------------------------
+
+using Dapr.Workflow;
+using WorkflowFanOutFanIn.Activities;
+
+namespace WorkflowFanOutFanIn.Workflows;
+
+public sealed class DemoWorkflow : Workflow<string, string>
+{
+    /// <summary>
+    /// Override to implement workflow logic.
+    /// </summary>
+    /// <param name="context">The workflow context.</param>
+    /// <param name="input">The deserialized workflow input.</param>
+    /// <returns>The output of the workflow as a task.</returns>
+    public override async Task<string> RunAsync(WorkflowContext context, string input)
+    {
+        var tasks = new List<Task>();
+        for (var a = 1; a <= 3; a++)
+        {
+            var task = context.CallActivityAsync(nameof(NotifyActivity), $"calling task {a}");
+            tasks.Add(task);
+        }
+
+        await Task.WhenAll(tasks);
+
+        return "Workflow completed";
+    }
+}