Multiple triggers in a single App service

[sudhamani-hcl]

Hi Team,

I need a clarification. Is it possible to configure multiple triggers in a single app service?
If it is possible, can you please point me to any reference example?

Thanks,
Sudhamani

[lenny-goodell]

Nope. App SDK is designed around a single trigger. Having multiple triggers would be contrary to proper microservice design of doing one thing and do it good.

[jiekechoo]

The simplist way, I think, setup 'two sinks' in eKuiper. It depends on your 'application service' , what is your core purpose?

[sudhamani-hcl]

Hi @lenny-intel ,

Please find the use-case below.

GUI
1.Initiate HTTP req

APP1
2. Receives that HTTP request,
3. Sends a command to the end device to get on-demand data
4. Receives the data from the end device
5. Process and forward the data to APP2

We have a requirement where APP2 needs to take some actions based on the received data from different APPs.

Thanks,
Sudhamani

[sudhamani-hcl]

Hi @jiekechoo ,
Thanks for the suggestion. We'll check and let you know.

[lenny-goodell]

@sudhamani-hcl , the Command can return the data directly as the response to the request, rather than on the MessageBus. Simply set the Boolean parameters dsRetrunEvent to true and dsPushEvent to false.
https://github.com/edgexfoundry/go-mod-core-contracts/blob/v3.0/clients/interfaces/command.go#L28
This will allow you to have a single App Service.

What actions does your App Service need to take "based on the received data"?

[sudhamani-hcl]

Thanks @lenny-intel , I will look into this and get back to you.

Thanks,
Sudhamani.