Expose and API from Appian

11 replies
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Hi All,

Can anyone help me on, is it possible we can expose an API from Appian Side, which can be accessed by SAP ,

and when the Api is called from SAP side, a Process model will trigger with details.

acaciob0002

Participating Frequently

Hi Vinneth,

I ended up answering you in your other thread.

But yes, you can achieve what you are looking for using an Web API component.

Please check the link below:

https://docs.appian.com/suite/help/21.2/Designing_Web_APIs.html

Regards,

Acacio B,

stefanhelzle0001

Brainy

In Appian, when you create a new web api object, this is one of the available templates. Takes about 5 clicks. Did you try this?

vineethk0001Author

Known Participant

Hi Stefan/Acacio,

I have implemented the Mapping to CDT with API Body, but getting the below error, can you please help me out with the same,

Not a valid Web API Response. Received: [Lcom.appiancorp.core.expr.reaction.ReactionTree;@2617a999.

Internal Server Error on REST API invocation.
com.appiancorp.exceptions.LocalizedAppianRuntimeException$LocalizedAppianException: Contact your application administrator for help resolving this issue. Provide them with the following issue identifier: IV82KT3W (APNX-1-4533-000)


a!localVariables(
  local!jsondata : a!fromJson(
    http!request.body
  ),
  local!cdtdata : a!forEach(items: local!jsondata, expression:{'type!{urn:com:appian:types}PF_Request'(
    requestId: fv!item[fv!index].requestId, 
    destinationCountryID: fv!item[fv!index].destinationCountryID,
    frieghtCurrencyID: fv!item[fv!index].frieghtCurrencyID,
    GBEID: fv!item[fv!index].GBEID,
    LID: fv!item[fv!index].LID,
    LOBID: fv!item[fv!index].LOBID,
    leadSupplyLocationID: fv!item[fv!index].leadSupplyLocationID,
    originCountryID: fv!item[fv!index].originCountryID,
    processID: fv!item[fv!index].processID,
    reasonCodeID: fv!item[fv!index].reasonCodeID,
    regionID: fv!item[fv!index].regionID, 
    rootCauseID: fv!item[fv!index].rootCauseID,
    routingMethodID: fv!item[fv!index].routingMethodID,
    shipmentDirectionID: fv!item[fv!index].shipmentDirectionID,
    shipmentWidth: fv!item[fv!index].shipmentWidth,
    shipperID: fv!item[fv!index].shipperID,
    approvalLevels: fv!item[fv!index].approvalLevels,
    approvalLevelsCompleted: fv!item[fv!index].approvalLevelsCompleted,
    correctiveActionReason: fv!item[fv!index].correctiveActionReason,
    destionationCustomerSupplier: fv!item[fv!index].destionationCustomerSupplier,
    destinationSiteID: fv!item[fv!index].destinationSiteID, 
    fGPartNumber: fv!item[fv!index].fGPartNumber,
    freightCost: fv!item[fv!index].freightCost,
    isFreightRecoverable: fv!item[fv!index].isFreightRecoverable,
    isWeightKnown: fv!item[fv!index].isWeightKnown,
    originCustomerSupplier: fv!item[fv!index].originCustomerSupplier,
    originSiteID: fv!item[fv!index].originSiteID,
    originStateId: fv!item[fv!index].originStateId,
    otherRoutingMethod: fv!item[fv!index].otherRoutingMethod,
    otherShipper: fv!item[fv!index].otherShipper,  
    partNumber: fv!item[fv!index].partNumber, 
    projectNumber: fv!item[fv!index].projectNumber,
    purchaseOrder: fv!item[fv!index].purchaseOrder,
    requestDt: fv!item[fv!index].requestDt,
    requestor: fv!item[fv!index].requestor,
    requiredShipDate: fv!item[fv!index].requiredShipDate,
    revenueAtRisk: fv!item[fv!index].revenueAtRisk,
    rootCauseReason: fv!item[fv!index].rootCauseReason,
    ShipmentHeight: fv!item[fv!index].ShipmentHeight,
    ShipmentLength: fv!item[fv!index].ShipmentLength,
    ShipmentUnits: fv!item[fv!index].ShipmentUnits, 
    ShipmentWeight: fv!item[fv!index].ShipmentWeight,
    ShipperEmail: fv!item[fv!index].ShipperEmail,
    Status: fv!item[fv!index].Status,
    TotalCost: fv!item[fv!index].TotalCost,
    USFreightCost: fv!item[fv!index].USFreightCost,
    WaybillNumber: fv!item[fv!index].WaybillNumber,
    OriginSite: fv!item[fv!index].OriginSite,
    DestinationSite: fv!item[fv!index].DestinationSite,
    /*CompletedOn: fv!item[fv!index].CompletedOn,*/
    ActualFreightCost: fv!item[fv!index].ActualFreightCost,
    FreightRiskPercent: fv!item[fv!index].FreightRiskPercent,
    
  )
  
  }
  ),
  
  {
    
    a!startProcess(
      processModel: cons!Test_Email_WebAPI,
      processParameters: {
        PF_Request : local!cdtdata
      },
      onSuccess: a!httpResponse(
        statusCode: 200,
        headers: {
          a!httpHeader(name: "Content-Type", value: "application/json")
        },
        body: a!toJson(
          fv!processInfo
        )
      ),
      onError: a!httpResponse(
        statusCode: 500,
        headers: {
          a!httpHeader(name: "Content-Type", value: "application/json")
        },
        body: a!toJson(
          {
            error: "There was an error starting the process"
          }
        )
      )
    )
  }
  
)

stefanhelzle0001

Brainy

There is a few things here. First, about the error message. Check this

https://docs.appian.com/suite/help/21.2/Appian_Administration_Console.html#simplified-error-messages

Then, the foreach(). fv!item already is a single item from the list. There is no need for [fv!index|.

Next, is the data structure in JSON any different than the CDT? Why recreate the data at all? Appian would happily map the data into your process.

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