Hi Folks, I'm trying to achieve the following: Create WebAPI for JSON request - this Web API accepts a JSON request After accepting a JSON-type input - a process model is initiated to which this JSON value is passed If the process initiation is successful, a success response is sent back as acknowledgement Any inputs would be great, as I'm just beginning, I can implement more efficient code. Thanks in advance!!

Steps: -> Go to designer, inside designer go to your application -> Select create new Web api -> Give the name to the web api. description and end point which should be unique.Also set the security of the web api to appropriate user. -> Also the method type of the web api should be post because when we trigger a smart service from a web api ,the method should always be post -> Once the above steps are done and you proceed you will get multiple web api templates ,from that select "Start Process Model" template -> A predefined code will occur then in that code make the alteration like setting the property processModel with a constant which holds your process model name and processParameters to a!fromJson(http!request.body), -> Done Hope this will help you

Web API to Process model integration

apoorvam over 6 years ago

Hi Folks,

I'm trying to achieve the following:

Create WebAPI for JSON request - this Web API accepts a JSON request
After accepting a JSON-type input - a process model is initiated to which this JSON value is passed
If the process initiation is successful, a success response is sent back as acknowledgement

Any inputs would be great, as I'm just beginning, I can implement more efficient code.

Thanks in advance!!

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0 Brazil Vibanco
A Score Level 1
over 6 years ago

Additionally to the steps, you have to keep in mind that you can configure the response on the web Api as you want, it could be based on the start of the process or you can validate structure, information, etc. within the web api.
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0 aseemk0001 over 6 years ago in reply to Brazil Vibanco

Responding to an old thread as I ran in to a problem related to this.

I have a Web API that accepts JSON request with few attributes. One of the attribute in the request is in JSON format and I ran in to issue while passing this value to process model. Below is the request format.

"payload" attribute is mapped to a text variable in process model but the variable value is in dictionary format and not able to retrive each values from this variable (like Attribute2_2_1) in the process model.

Is a there way I can retain the JSON format in process model variable ? I have already tried converting this to a JSON using a!toJson/a!fromJson but unable to convert the format. Thank you.

{
"Request":
{
"Attribute1":"value",
"payload":
{
"Attribute2_1":"value",
"Attribute2_2":
{
"Attribute2_2_1":"value",
"Attribute2_2_2":"value"
},
"Attribute3":"value"
}
}
}

Value in Payload variable on Process Model:

[payload:[Attribute2_1:value, Attribute2_2:[Attribute2_2_1:value, Attribute2_2_2:value], Attribute3:value]]
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0 aseemk0001 over 6 years ago in reply to Brazil Vibanco

Responding to an old thread as I ran in to a problem related to this.

I have a Web API that accepts JSON request with few attributes. One of the attribute in the request is in JSON format and I ran in to issue while passing this value to process model. Below is the request format.

"payload" attribute is mapped to a text variable in process model but the variable value is in dictionary format and not able to retrive each values from this variable (like Attribute2_2_1) in the process model.

Is a there way I can retain the JSON format in process model variable ? I have already tried converting this to a JSON using a!toJson/a!fromJson but unable to convert the format. Thank you.

{
"Request":
{
"Attribute1":"value",
"payload":
{
"Attribute2_1":"value",
"Attribute2_2":
{
"Attribute2_2_1":"value",
"Attribute2_2_2":"value"
},
"Attribute3":"value"
}
}
}

Value in Payload variable on Process Model:

[payload:[Attribute2_1:value, Attribute2_2:[Attribute2_2_1:value, Attribute2_2_2:value], Attribute3:value]]
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0 sanjeetg891 over 5 years ago in reply to aseemk0001

Hello,

Did you find a way to have the format correctly in variable?
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0 Peter Lewis
Appian Employee
over 5 years ago in reply to sanjeetg891

It isn't possible to create process variable of "Dictionary" or "Any Type", so your best bet is to create a custom data type that matches the structure of this JSON request. Then, create a variable using that CDT and it will preserve the structure in your process variable.
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0 aseemk0001 over 5 years ago in reply to sanjeetg891

Yes. Extracted the values from the request and assigned to Process parameter. This way you can get the actual request in JSON format in to the process model. Sample below.

Request :

{
"Request":
{
"Attribute1":"value",
"payload":
{
"Attribute2_1":"value",
"Attribute2_2":
{
"Attribute2_2_1":"value",
"Attribute2_2_2":"value"
},
"Attribute3":"value"
}
}
}

WebAPI:

a!startProcess(

processModel:cons!PM_NAME,

processParameters:

{

Attribute1:a!fromJson(http!request.body).Request.Attribute1,

payload:a!toJson(a!fromJson(http!request.body).Request.payload)

}

)
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