Data Storage sended by an app

[antiadominguez]

I am searching for a way to storage on core-data the data sended by an app-service. I have an app-service that analyze the events of a device and post the result back to the bus. I found that core-data only listen to event topic and I would like to know if exists the way to listen to application service topic.

[jiekechoo]

@antiadominguez
We need more information about your app-service.
There are some tips for you:

• Using the app-service sends events to message-bus in formated topics: PublishWithTopic
• By default you could use the rule-engine(eKuiper) analyzing the events

Jieke Choo

[antiadominguez]

My app-service has an IA module inside, so I want to catch device events, pass them through my IA and then publish the result back to the bus and storage on the core-data if it is possible. I think eKuiper is not capable to do that, so I program my own app-service. I will try PublishWithTopic as you commented but here you have more info about my app

[cloudxxx8]

@antiadominguez if you are writing your own app service, you can leverage the event client to send data to Core Data with REST API
https://docs.edgexfoundry.org/3.1/microservices/application/sdk/api/ApplicationServiceAPI/#eventclient

[antiadominguez]

I don't understand what you mean with that, if you can explain it in detail

[jiekechoo]

There are a few steps that you have to do in your app-service.

• Setup Core-Data client in the configuration.yaml file
• Using EventClient API to create a client as @cloudxxx8 mentioned
• Send events to the message-bus

[antiadominguez]

I'm not understanding what you mean with the second step, I don't know how to use EventClient API and the documentation is very confusing

[cloudxxx8]

It's the Golang client code, so the first question is whether you are writing your own app service.
You can use HTTP export or MQTT export to achieve the same thing, if you are using app configurable.

[antiadominguez]

Yes, I am writing my own app service starting on the template