Callback state validation

[madhubabu5]

I'm experiencing a syntax error in the Serverless Workflow Web Editor and the Java SDK while using the callback state example provided in the specification. Could you please verify if this issue lies within the specification itself ?

[ricardozanini]

@madhubabu5 we have the fix for the web editor: serverlessworkflow/vscode-extension#26

@JBBianchi do you know if this PR will also fix the web editor? I guess we have to open a PR in the website too including your changes?

For the Java SDK, which version are you using?

[madhubabu5]

@ricardozanini Thanks for the response. I am using Java SDK 4.0.3.Final. Is that fix has to be done in the Java SDK also ?

[ricardozanini]

@madhubabu5 This Java SDK version supports spec v0.8, not the one in the main branch. Reading your reply below, I believe that the problem lies there. We accept contributions to the Java SDK, thou. You can implement it in the main branch there and I release a CR1 version of the SDK supporting what you need. wdyt?

[madhubabu5]

@ricardozanini Sure. I'll start working on implementing the necessary changes in the main branch of the Java SDK.

Can I create an issue in the repository for the problem we discussed?

In the meantime, could you provide any specific guidelines or requirements for the implementation ?

[madhubabu5]

@ricardozanini @JBBianchi

Bug: ! is missing in the if condition in the version 4.0.3.Final

                if (haveFunctionDefinition(
                      callbackState.getAction().getFunctionRef().getRefName(), functions)) {
                    addValidationError(
                        "CallbackState action function ref does not reference a defined workflow function definition",
                        ValidationError.WORKFLOW_VALIDATION);
                  }

This was already fixed and available from version 4.0.5.Final. So I will upgrade my version. Thanks for your help.

[JBBianchi]

@ricardozanini the VSCoode extension isn't the web editor. Both the extension and the web editor are based on the TypeScript SDK. It's probably where the problem lies.

@madhubabu5 could you please provide more info about the said problem, for example a sample workflow reproducing this behavior?

[madhubabu5]

@JBBianchi To replicate the issue described, follow this link https://github.com/serverlessworkflow/specification/tree/main/examples#Perform-Customer-Credit-Check-Example , below the workflow diagram you can find the complete JSON or YML. When using this DSL in the Web Editor, an error occurred saying that the syntax error in graph.

In Java SDK , in the functions isValid() and validate() in WorkflowValidator class giving incorrect output for the above DSL.

When executing the following code :
List validationErrorList = dslWorkflowValidator.setWorkflow(dslWorkflow).validate();

Even though syntax in the above DSL is correct, I am getting the following validation error :
com.phenom.sh.workflows.common.exceptions.impl.InvalidDSLFileException: CallbackState action function ref does not reference a defined workflow function definition But I am sure everything is correct.

Can you please check and let me know if I miss anything.

[JBBianchi]

Ok, I see. For the web editor part, it's related to a problem in the TS SDK that's been fixed but not deployed to the website yet. State names with a dash would generate an invalid Mermaid Graph. See issue 183 and PR 184

So the synthax of the Perform Customer Credit Check workflow is correct but there is indeed a DSL error in the sample that needs to be fixed: the state check-credit have an action that references a function called call-credit-check-microservice but there is no function with that name. So either the function named credit-check-function or the reference to call-credit-check-microservice should be renamed to match one an other.

Here is a version of the workflow should work both on the editor and in the Java SDK:

{
    "id": "customercreditcheck",
    "version": "1.0.0",
    "specVersion": "0.8",
    "name": "customercreditcheck",
    "description": "Perform Customer Credit Check",
    "start": "checkcredit",
    "functions": [
        {
            "name": "call-credit-check-microservice",
            "operation": "http://myapis.org/creditcheckapi.json#doCreditCheck"
        },
        {
            "name": "send-rejection-email-function",
            "operation": "http://myapis.org/creditcheckapi.json#rejectionEmail"
        }
    ],
    "events": [
        {
            "name": "credit-check-completed-event",
            "type": "creditCheckCompleteType",
            "source": "creditCheckSource",
            "correlation": [
                {
                    "contextAttributeName": "customerId"
                }
            ]
        }
    ],
    "states": [
        {
            "name": "checkcredit",
            "type": "callback",
            "action": {
                "name": "check-credit",
                "functionRef": {
                    "refName": "call-credit-check-microservice",
                    "arguments": {
                        "customer": "${ .customer }"
                    }
                }
            },
            "eventRef": "credit-check-completed-event",
            "timeouts": {
                "stateExecTimeout": "PT15M"
            },
            "transition": "evaluatedecision"
        },
        {
            "name": "evaluatedecision",
            "type": "switch",
            "dataConditions": [
                {
                    "condition": "${ .creditCheck | .decision == \"Approved\" }",
                    "transition": "startapplication",
                    "name": "startapplication"
                },
                {
                    "condition": "${ .creditCheck | .decision == \"Denied\" }",
                    "transition": "rejectapplication",
                    "name": "reject-application"
                }
            ],
            "defaultCondition": {
                "transition": "rejectapplication"
            }
        },
        {
            "name": "startapplication",
            "type": "operation",
            "actions": [
                {
                    "name": "start-application",
                    "subFlowRef": "startApplicationWorkflowId"
                }
            ],
            "end": true
        },
        {
            "name": "rejectapplication",
            "type": "operation",
            "actionMode": "sequential",
            "actions": [
                {
                    "name": "reject-application",
                    "functionRef": {
                        "refName": "send-rejection-email-function",
                        "arguments": {
                            "applicant": "${ .customer }"
                        }
                    }
                }
            ],
            "end": true
        }
    ]
}

[madhubabu5]

@JBBianchi The above dsl is working fine in the WebEditor. But on Java SDK , still showing error.

[JBBianchi]

@madhubabu5 is it still the same error? I don't have any experience with the Java SDK so I just fixed the error you mentioned, maybe there is an other one down the line.

[madhubabu5]

@JBBianchi yes, still getting the same error in Java SDK. Not sure exactly what was that issue, I will check on that.

[cdavernas]

Closing, as the discussion was answered and the issue is now stale given it applies to a discontinued version of the spec!