如何捕捉 Milo OPC UA 中监控项的变化？

Question

I am writing a client using the Milo library in the Java programming language. I have seen examples where the setValueConsumer(Value Consumer value Consumer) or setEventConsumer(EventConsumer eventConsumer) method of the UaMonitoredItem object is used, but as I understood it is necessary only for debugging information/logs. Like in this example:

monitoredItem.setEventConsumer((item, vs) -> {
            logger.info(
                "Event Received from {}",
                item.getReadValueId().getNodeId());
});

The question is how to catch the UaMonitoredItem change when using a subscription in order to use this notification in other parts of the application?

Answer 1

There's no reason you can't use this callback in your application as well. The example just doesn't other parts of an application to do anything with it.