How to test greeting workflow in Synapse?

[mumubin]

I am new to serverless workflow, I want to test it's example in synapse.
Here is my test example workflow.

{
  "id": "greeting",
  "name": "Greeting Workflow",
  "description": "Greet Someone",
  "version": "1.0.5",
  "specVersion": "0.8",
  "functions": [
    {
      "name": "greetingFunction",
      "operation": "https://gist.githubusercontent.com/mumubin/7d6ede1791ddd6fb705576187f91c930/raw/5357026c05ddb641de52b27d5e922856be1243e3/greeting.yaml#randomGreeting",
      "type": "rest"
    }
  ],
  "start": "Greet",
  "states": [
    {
      "name": "Greet",
      "type": "operation",
      "actions": [
        {
          "actionDataFilter": {
            "results": "${ {greeting: .greeting} }"
          },
          "functionRef": {
            "refName": "greetingFunction",
            "arguments": {
              "name": "${ .person.name }"
            }
          }
        }
      ],
      "end": true
    }
  ]
}

here is my input data

{
  "person": {
    "name": "John"
  }
}

But I got the error output

{
  "code": "NullReference",
  "message": "Failed to find an action that matches the metadata specified by the activity with id '71ca09e5-9968-4190-936c-41a938aba16a'"
}

This is the log

 
Input/Output
Activities
Logs
�C[05:53:20] info: Synapse.Worker.Services.WorkflowRuntimeContext[0]
�h Initializing the runtime context for workflow instance with id 'greeting-egi9dh3iusbnzeohsijw'...
�/[05:53:20] info: Microsoft.Hosting.Lifetime[0]
�6 Application started. Press Ctrl+C to shut down.
�/[05:53:20] info: Microsoft.Hosting.Lifetime[0]
�& Hosting environment: Production
�/[05:53:20] info: Microsoft.Hosting.Lifetime[0]
�� Content root path: /app
�C[05:53:21] info: Synapse.Worker.Services.WorkflowRuntimeContext[0]
�D Retrieving definition of workflow with id 'greeting:1.0.5'...
�C[05:53:21] info: Synapse.Worker.Services.WorkflowRuntimeContext[0]
�" Runtime context initialized
�<[05:53:21] info: Synapse.Worker.Services.WorkflowRuntime[0]
�+ Starting the workflow's execution...
�O[05:53:21] info: Synapse.Worker.Services.Processors.OperationStateProcessor[0]
�V Initializing activity '6659cc95-bc5a-450a-905c-7ec3a005a6b5' (type: 'State')...
�M[05:53:21] fail: Synapse.Worker.Services.WorkflowActivityProcessorFactory[0]
��� An error occured while creating a new processor for the activity with id '71ca09e5-9968-4190-936c-41a938aba16a': System.NullReferenceException: Failed to find an action that matches the metadata specified by the activity with id '71ca09e5-9968-4190-936c-41a938aba16a'
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.CreateActionActivityProcessor(StateDefinition state, V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 125
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.Create(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 72
�O[05:53:21] warning: Synapse.Worker.Services.Processors.OperationStateProcessor[0]
��� An error occured while executing the activity '6659cc95-bc5a-450a-905c-7ec3a005a6b5' (type: 'State')/r/nDetails:/r/nSystem.NullReferenceException: Failed to find an action that matches the metadata specified by the activity with id '71ca09e5-9968-4190-936c-41a938aba16a'
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.CreateActionActivityProcessor(StateDefinition state, V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 125
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.Create(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 72
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.Synapse.Worker.Services.IWorkflowActivityProcessorFactory.Create(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 320
�� at Synapse.Worker.Services.WorkflowActivityProcessor.CreateProcessorFor(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessor.cs:line 194
�� at Synapse.Worker.Services.Processors.OperationStateProcessor.CreateProcessorFor(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/Processors/OperationStateProcessor.cs:line 46
�� at Synapse.Worker.Services.Processors.OperationStateProcessor.StartAsync() in /src/src/apps/Synapse.Worker/Services/Processors/OperationStateProcessor.cs:line 103
�� at Synapse.Worker.Services.Processors.OperationStateProcessor.InitializeAsync(CancellationToken cancellationToken) in /src/src/apps/Synapse.Worker/Services/Processors/OperationStateProcessor.cs:line 60
�� at Synapse.Worker.Services.WorkflowActivityProcessor.<>c__DisplayClass30_0.<b__0>d.MoveNext() in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessor.cs:line 103
�<[05:53:22] warning: Synapse.Worker.Services.WorkflowRuntime[0]
�� An error occured while executing the workflow instance: System.NullReferenceException: Failed to find an action that matches the metadata specified by the activity with id '71ca09e5-9968-4190-936c-41a938aba16a'
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.CreateActionActivityProcessor(StateDefinition state, V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 125
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.Create(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 72
�� at Synapse.Worker.Services.WorkflowActivityProcessorFactory.Synapse.Worker.Services.IWorkflowActivityProcessorFactory.Create(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessorFactory.cs:line 320
�� at Synapse.Worker.Services.WorkflowActivityProcessor.CreateProcessorFor(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessor.cs:line 194
�� at Synapse.Worker.Services.Processors.OperationStateProcessor.CreateProcessorFor(V1WorkflowActivity activity) in /src/src/apps/Synapse.Worker/Services/Processors/OperationStateProcessor.cs:line 46
�� at Synapse.Worker.Services.Processors.OperationStateProcessor.StartAsync() in /src/src/apps/Synapse.Worker/Services/Processors/OperationStateProcessor.cs:line 103
�� at Synapse.Worker.Services.Processors.OperationStateProcessor.InitializeAsync(CancellationToken cancellationToken) in /src/src/apps/Synapse.Worker/Services/Processors/OperationStateProcessor.cs:line 60
�� at Synapse.Worker.Services.WorkflowActivityProcessor.<>c__DisplayClass30_0.<b__0>d.MoveNext() in /src/src/apps/Synapse.Worker/Services/WorkflowActivityProcessor.cs:line 103
�/[05:53:22] info: Microsoft.Hosting.Lifetime[0]
�& Application is shutting down...

[cdavernas]

@mumubin Can you try naming your action and see if that works?

We are working in SW to make name or id required for every single component, and I took the initiative to already enforce it on Synapse

[mumubin]

Thanks @cdavernas .
After adding action name, it works.
However, the YAML file I tested came from https://github.com/serverlessworkflow/specification/blob/main/examples/README.md#workflow-definition-1.
It seems a bug in the examples. Let me submit a pr to fix it.

[mumubin]

Fixed SW yaml.

{
  "id": "greeting",
  "name": "Greeting Workflow",
  "description": "Greet Someone",
  "version": "1.0.8",
  "specVersion": "0.8",
  "functions": [
    {
      "name": "greetingFunction",
      "operation": "https://gist.githubusercontent.com/mumubin/7d6ede1791ddd6fb705576187f91c930/raw/5357026c05ddb641de52b27d5e922856be1243e3/greeting.yaml#randomGreeting",
      "type": "rest"
    }
  ],
  "start": "Greet",
  "states": [
    {
      "name": "Greet",
      "type": "operation",
      "actions": [
        {
          "name": "GreetingAction",
          "actionDataFilter": {
            "results": "${ {greeting: .greeting} }"
          },
          "functionRef": {
            "refName": "greetingFunction",
            "arguments": {
              "name": "${ .person.name }"
            }
          }
        }
      ],
      "end": true
    }
  ]
}