Added workflow sample: Sub-workflows

Directory.Packages.props

@@ -1,47 +1,48 @@
 <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.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.Logging" Version="6.0.0" />
-        <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.4" />
-        <PackageVersion Include="Microsoft.Extensions.Http" 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="6.0.10" />
-        <PackageVersion Include="xunit" Version="2.9.2" />
-        <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
-    </ItemGroup>
-</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.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.Hosting" Version="6.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Logging" Version="6.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.4" />
+    <PackageVersion Include="Microsoft.Extensions.Http" 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="6.0.10" />
+    <PackageVersion Include="xunit" Version="2.9.2" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+</Project>

all.sln

@@ -119,6 +119,8 @@ 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}") = "WorkflowSubworkflow", "examples\Workflow\WorkflowSubworkflow\WorkflowSubworkflow.csproj", "{FD3E9371-3134-4235-8E80-32226DFB4B1F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -303,6 +305,10 @@ 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
+		{FD3E9371-3134-4235-8E80-32226DFB4B1F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FD3E9371-3134-4235-8E80-32226DFB4B1F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FD3E9371-3134-4235-8E80-32226DFB4B1F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FD3E9371-3134-4235-8E80-32226DFB4B1F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -359,6 +365,7 @@ 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}
+		{FD3E9371-3134-4235-8E80-32226DFB4B1F} = {BF3ED6BF-ADF3-4D25-8E89-02FB8D945CA9}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {65220BF2-EAE1-4CB2-AA58-EBE80768CB40}

examples/Workflow/WorkflowSubworkflow/Program.cs

@@ -0,0 +1,42 @@
+// ------------------------------------------------------------------------
+// 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 WorkflowSubWorkflow.Workflows;
+
+var builder = Host.CreateDefaultBuilder(args).ConfigureServices(services =>
+{
+    services.AddDaprWorkflow(options =>
+    {
+        options.RegisterWorkflow<DemoWorkflow>();
+        options.RegisterWorkflow<DemoSubWorkflow>();
+    });
+});
+
+using var host = builder.Build();
+await host.StartAsync();
+
+await using var scope = host.Services.CreateAsyncScope();
+var daprWorkflowClient = scope.ServiceProvider.GetRequiredService<DaprWorkflowClient>();
+
+var instanceId = $"demo-workflow-{Guid.NewGuid().ToString()[..8]}";
+await daprWorkflowClient.ScheduleNewWorkflowAsync(nameof(DemoWorkflow), instanceId, instanceId );
+
+await daprWorkflowClient.WaitForWorkflowCompletionAsync(instanceId);
+var state = await daprWorkflowClient.GetWorkflowStateAsync(instanceId);
+Console.WriteLine($"Workflow {instanceId}, state: {state.RuntimeStatus}");
+
+state = await daprWorkflowClient.GetWorkflowStateAsync($"{instanceId}-sub");
+Console.WriteLine($"Workflow {instanceId}-sub, state: {state.RuntimeStatus}");

examples/Workflow/WorkflowSubworkflow/WorkflowSubworkflow.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/WorkflowSubworkflow/Workflows/DemoSubWorkflow.cs

@@ -0,0 +1,33 @@
+// ------------------------------------------------------------------------
+// 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 WorkflowSubWorkflow.Workflows;
+
+internal sealed class DemoSubWorkflow : Workflow<string, bool>
+{
+    /// <summary>
+    /// Override to implement workflow logic.
+    /// </summary>
+    /// <param name="context">The workflow context.</param>
+    /// <param name="instanceId">The deserialized workflow input.</param>
+    /// <returns>The output of the workflow as a task.</returns>
+    public override async Task<bool> RunAsync(WorkflowContext context, string instanceId)
+    {
+        Console.WriteLine($"Workflow {context.InstanceId} started");
+        Console.WriteLine($"Received input: {instanceId}");
+        await context.CreateTimer(TimeSpan.FromSeconds(5));
+        return true;
+    }
+}

examples/Workflow/WorkflowSubworkflow/Workflows/DemoWorkflow.cs

@@ -0,0 +1,34 @@
+// ------------------------------------------------------------------------
+// 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 WorkflowSubWorkflow.Workflows;
+
+internal sealed class DemoWorkflow : Workflow<string, bool>
+{
+    /// <summary>
+    /// Override to implement workflow logic.
+    /// </summary>
+    /// <param name="context">The workflow context.</param>
+    /// <param name="instanceId">The deserialized workflow input.</param>
+    /// <returns>The output of the workflow as a task.</returns>
+    public override async Task<bool> RunAsync(WorkflowContext context, string instanceId)
+    {
+        Console.WriteLine($"Workflow {instanceId} started");
+        var subInstanceId = instanceId + "-sub";
+        var options = new ChildWorkflowTaskOptions(subInstanceId);
+        await context.CallChildWorkflowAsync<bool>(nameof(DemoSubWorkflow), "Hello, sub-workflow", options);
+        return true;
+    }
+}