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.NET: Update Workflow Input/Output Redesign (#881)

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* feat: Make Executor id field mandatory

When checkpointing is involved, it is critical to keep executor ids consistent between runs, even when recreating a new object tree for the workflow.

The default id-setting mechanism generated a guid for part of the id, making it not work when restoring from a checkpoint.

This change prevents this situation from arising.

* feat: Enable running untyped Workflows

With the change to enable delay-instantiation of executors and support for async Executor factory methods, we must instantiate the starting executor to know what are the valid input types for the workflow.

To avoid forcing instantiation every time, and to better support workflows with multiple input types, we enable support for build and interacting with the base Workflow type without type annotations, and remove the requirement to know a valid input type when initiating a run.

* feat: Support Output from any executor and multiple outputs.
This commit is contained in:
Jacob Alber
2025-09-24 22:03:22 -04:00
committed by GitHub
Unverified
parent 03ef7f054f
commit 39e071c430
89 changed files with 1413 additions and 998 deletions
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dotnet/samples/GettingStarted/Workflows/Loop/Program.cs
+12 -9
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@@ -24,22 +24,23 @@ public static class Program
private static async Task Main()
{
// Create the executors
GuessNumberExecutor guessNumberExecutor = new(1, 100);
JudgeExecutor judgeExecutor = new(42);
GuessNumberExecutor guessNumberExecutor = new("GuessNumber", 1, 100);
JudgeExecutor judgeExecutor = new("Judge", 42);
// Build the workflow by connecting executors in a loop
var workflow = new WorkflowBuilder(guessNumberExecutor)
var workflow = await new WorkflowBuilder(guessNumberExecutor)
.AddEdge(guessNumberExecutor, judgeExecutor)
.AddEdge(judgeExecutor, guessNumberExecutor)
.Build<NumberSignal>();
.WithOutputFrom(judgeExecutor)
.BuildAsync<NumberSignal>();
// Execute the workflow
StreamingRun run = await InProcessExecution.StreamAsync(workflow, NumberSignal.Init).ConfigureAwait(false);
await foreach (WorkflowEvent evt in run.WatchStreamAsync().ConfigureAwait(false))
{
if (evt is WorkflowCompletedEvent workflowCompleteEvt)
if (evt is WorkflowOutputEvent outputEvent)
{
Console.WriteLine($"Result: {workflowCompleteEvt}");
Console.WriteLine($"Result: {outputEvent}");
}
}
}
@@ -73,9 +74,10 @@ internal sealed class GuessNumberExecutor : ReflectingExecutor<GuessNumberExecut
/// <summary>
/// Initializes a new instance of the <see cref="GuessNumberExecutor"/> class.
/// </summary>
/// <param name="id">A unique identifier for the executor.</param>
/// <param name="lowerBound">The initial lower bound of the guessing range.</param>
/// <param name="upperBound">The initial upper bound of the guessing range.</param>
public GuessNumberExecutor(int lowerBound, int upperBound)
public GuessNumberExecutor(string id, int lowerBound, int upperBound) : base(id)
{
this.LowerBound = lowerBound;
this.UpperBound = upperBound;
@@ -113,8 +115,9 @@ internal sealed class JudgeExecutor : ReflectingExecutor<JudgeExecutor>, IMessag
/// <summary>
/// Initializes a new instance of the <see cref="JudgeExecutor"/> class.
/// </summary>
/// <param name="id">A unique identifier for the executor.</param>
/// <param name="targetNumber">The number to be guessed.</param>
public JudgeExecutor(int targetNumber)
public JudgeExecutor(string id, int targetNumber) : base(id)
{
this._targetNumber = targetNumber;
}
@@ -124,7 +127,7 @@ internal sealed class JudgeExecutor : ReflectingExecutor<JudgeExecutor>, IMessag
this._tries++;
if (message == this._targetNumber)
{
await context.AddEventAsync(new WorkflowCompletedEvent($"{this._targetNumber} found in {this._tries} tries!"))
await context.YieldOutputAsync($"{this._targetNumber} found in {this._tries} tries!")
.ConfigureAwait(false);
}
else if (message < this._targetNumber)