Integration inside a process called in a web API

RE: Integration inside a process called in a web API

spykid — Mon, 16 Oct 2023 09:30:12 GMT

@Stefan Helzle

Thank you for yor advice.

RE: Integration inside a process called in a web API

Stefan Helzle — Fri, 13 Oct 2023 14:09:08 GMT

I understand. Pushing larger volumes of text into a process will get you into trouble sooner or later.

I strongly recommend to try to change that on the other side. Appian supports multipart posts where one part is the meta data, and the other is the binary file.

RE: Integration inside a process called in a web API

spykid — Fri, 13 Oct 2023 13:09:25 GMT

＠Stefan Helzle

I'm trying to implement an Appian Web API (POST method) that is exposed to an external system.
A file is sent from an external system( Sending base64 inline with JSON) and the file format is base64.
In appian, files are managed by unique ID.So convert the base64 value received by web api and change to appian value .

RE: Integration inside a process called in a web API

Stefan Helzle — Fri, 13 Oct 2023 12:08:51 GMT

I have been reading it and did not really understand what you are trying to do.

Seems like you try to force Appian to somehow do this base64 conversion, which is difficult and tricky, and you will run into memory issues sooner or later.

RE: Integration inside a process called in a web API

spykid — Fri, 13 Oct 2023 12:00:42 GMT

@Stefan Helzle

Thank you for your response.

Here is my problem detail.

https://community.appian.com/discussions/f/integrations/30291/sending-base64-inline-with-json-using-integration-object-and-many-pdf-files-were-created

Thanks and need help

RE: Integration inside a process called in a web API

Stefan Helzle — Fri, 13 Oct 2023 11:31:17 GMT

Can you elaborate on that "same problem"?

RE: Integration inside a process called in a web API

spykid — Fri, 13 Oct 2023 11:17:42 GMT

@jeanmichelm0001

I have a same problem and how did you solve it?

RE: Integration inside a process called in a web API

Mathieu Drouin — Sun, 13 Mar 2022 16:02:20 GMT

Only solutions I can see working is implementing the retry logic directly in the calling application (as Stefan suggested above). You could also have one process manage the initial API call (and subsequent error retries) and provide a separate API endpoint to allow them to poll for a response or have your process call a webhook in the calling application once it has received a successful response.

RE: Integration inside a process called in a web API

Stefan Helzle — Sun, 13 Mar 2022 08:14:17 GMT

OK. Any kind of timer or scheduling will break the chaining.

I understand that you want to implement some error handling in that process model, but an Appian process is not Java and error handling on a low level like network timeouts etc. cannot be handled.

There is a reason for process alerts. If it is critical, that the integration call succeeds, then call the error() function in the integration node's output configuration in case the result is not valid. Then the process will stop and an admin needs to check.

In case a successful call is not important, return a 503 HTTP code.

RE: Integration inside a process called in a web API

jeanmichelm0001 — Sat, 12 Mar 2022 21:52:32 GMT

the process is called in a web API. and the response of the web API needs to display the response of the integration shown in the image, hence the activity chaining.

i tried the the scheduling for the node, but it is also breaking the chaining

RE: Integration inside a process called in a web API

jeanmichelm0001 — Sat, 12 Mar 2022 21:50:33 GMT

It is.

I am triggering this process from a Web API and calling the integration to another system inside the process as you can see in the image

RE: Integration inside a process called in a web API

Mathieu Drouin — Sat, 12 Mar 2022 18:13:05 GMT

Not quite sure what the issue may be but what could help to troubleshoot would be to create a PV lists for each of the return values and add custom outputs where you add it to the list - it would allow you to see what's returned on subsequent calls.

A couple of other notes:

Not sure why activity chaining is required in this process model considering you're possibly doing some retries with a timer.
Won't have much of an effect other than simplifying your PM but you can also put the delay directly on the node itself. Set it to 0 minutes on the 1st try and 1 minute on any subsequent try.

RE: Integration inside a process called in a web API

Stefan Helzle — Sat, 12 Mar 2022 16:16:07 GMT

I did not really understand what you want to achieve. Is this an unreliable system you integrate with?

RE: Integration inside a process called in a web API

jeanmichelm0001 — Sat, 12 Mar 2022 15:37:00 GMT

Thanks Stefan. Is there an alternative for the timer event?

RE: Integration inside a process called in a web API

Stefan Helzle — Sat, 12 Mar 2022 15:30:29 GMT

A timer event will always break the chaining.

RE: Integration inside a process called in a web API

jeanmichelm0001 — Sat, 12 Mar 2022 15:20:37 GMT

i have activity chaining enabled

RE: Integration inside a process called in a web API

jeanmichelm0001 — Sat, 12 Mar 2022 15:20:08 GMT

here you go

RE: Integration inside a process called in a web API

Harshit Bumb (Appyzie) — Sat, 12 Mar 2022 15:07:06 GMT

Hi there,

Looks like an activity chaining issue. Can you post the screenshot of the process model?

RE: Integration inside a process called in a web API

Mathieu Drouin — Fri, 11 Mar 2022 19:37:11 GMT

When you say "twice or more", how exactly are you running it multiple times? Via MNI? Just manually running with multiple nodes one after the other?

RE: Integration inside a process called in a web API

jeanmichelm0001 — Fri, 11 Mar 2022 16:24:26 GMT

Yes they are.

RE: Integration inside a process called in a web API

jayashreer0001 — Fri, 11 Mar 2022 16:18:36 GMT

Are the inputs and outputs set correctly in the Integration Object's setup ? Can you paste the image of it here ?