We are using SAP PO server and not SAP Cloud. We have a UI built in SAP ui5 and all DB operations are done using REST services built using JAVA session bean.
Now our requirement is to trigger a message to UI when ever there is a change in DB entry (also we can use Java System property instead of DB).
I know there is an api to capture the event triggered when a value is changed in Java System property. I need to make a call to UI through this event capturing Java service.
Is there a way to do this.Or there is other way possible which I am not able to look at.
So to trigger the message to the UI you will need a middle layer. This middle layer can be a websocket to update the UI.
Client connects to websocket middleware. When New insert into DB => SAP PO POST to middleware => Middleware Pushes data to client via Websocket => Client triggers a function when receiving data.
This will give you a live update. No refresh, reload or POST to REST service to check for updates, it will tell the client when it is a update and you can push data thru the websocket. Its a data stream if i am not mistaking.
Or check out MQTT, works the same way. I just like socket.io better for some reason.
Yes, you need to push a message to a microservice/middleware that is running a Websocket, or MQTT (Java suport) http://mqtt.org/tag/java. With one of those two you can run a function live in the frontend. And pas data to the front end. So you can add a new row to a table without a refresh in the frontend or a new cal to the backend.
I am a javascript dude my self, so i would create a microservice with NodeJS and Socet.io. And it is hard for me to explain this better.
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