help: CustomEvent possible?

[jnsw]

I want to create a BaseEventTypeNode with Properties in BaseEventType to instance them later as an Event. But if I do so, it is not an abstract node like the other nodes already in BaseEventType and some "Bad Internal Error" occurs. If I am making UaObjectTypeNode, it can't cast UaObjectTypeNode to BaseEventTypeNode. What I am missing? Can someone provide some example code for creating an CustomEvent with properties, that I can use for example in startBogusEventNotifier() to see, if it works?

[kevinherron]

Can you post the full error and some code?

[kevinherron]

This is all relatively undocumented because it's meant to be used primarily with UANodeSet models and code generators that don't exist / aren't public yet.

Creating and registering all this stuff by hand is a little tedious.

[jnsw]

It is, true, but it is a quite final server. or do you know any other open source java library I could use? Java is here the way I have to go.

[kevinherron]

There's not any other good Java options.

The OPC Foundation has abandoned their UA-Java code, which was only a stack, and none of the "SDK", so you'd have to roll the entire service/application layer yourself.

Commercially there is the Prosys SDK if you don't mind paying some thousands of dollars.

[jnsw]

yeah, if its too complicated we would drive with prosys, but it a lot money for just that information and communication feature

[jnsw]

added

        getServer().getObjectTypeManager().registerObjectType(
                newNodeId(1027),
                BaseEventTypeNode.class,
                BaseEventTypeNode::new
        );

and it works like a charm! thank you so much!

[jnsw]

sorry to ask again, but how do I write values to the custom defined properties? do I need to create special classes that extend BaseEventTypeNode or can I just BaseEventTypeNode.setProperty with a properly QualifiedProperty<> - but what do I need for a QualifiedProperty?

[kevinherron]

You need all the information about the property (name, datatype, etc...).

You can also just get the property node itself and then call setValue on it.

[jnsw]

You can also just get the property node itself and then call setValue on it.

I am getting further, but I don't quite understand, I am now getting the Property-Node of my created event by using getPropertyNode(browseName) and am I getting the correct Node (as I can see in debug mode) to write my value to, but after publishing the event with server.getEventBus().post(event); it gets pushed but the property is still missing in UaExpert.

This is my created EventType I put into your factory.

but it seems not to add the property "CleaningType" which is an enum, because the manually added column is empty

[jnsw]

This is my generating EventType, which works fine like you can see in the screenshots above

       //loading DTO 
        EventNsdto currentEventTypeNsdto = (EventNsdto) InfoModelDescription.getTree().get(shortName); //TODO: Change to IMSN
        NodeId currentEventType_NodeId = newNodeId(currentEventTypeNsdto.getNodeIdTypesNumber());

        //Creating EventTypeNode
        UaObjectTypeNode currentEventTypeNode = new UaObjectTypeNode(
                getNodeContext(),
                currentEventType_NodeId,
                new QualifiedName(
                        currentEventType_NodeId.getNamespaceIndex(),
                        currentEventTypeNsdto.getBrowseName()),
                LocalizedText.english(currentEventTypeNsdto.getBrowseName()),
                LocalizedText.NULL_VALUE,
                uint(0),
                uint(0),
                true
        );

//Code for adding property (Code seperately below)

        //Adding Event to TypeManager
        getServer().getObjectTypeManager().registerObjectType(
                currentNode.getNodeId(),
                BaseEventTypeNode.class,
                BaseEventTypeNode::new
        );

        currentNode.addReference(new Reference(currentNode.getNodeId(), Identifiers.HasSubtype, Identifiers.BaseEventType.expanded(), false));

        getNodeManager().addNode(currentNode);

Creating and adding Property: This is how I add an example property to that event node above

     //Creating Property for EventTypeNode
       PropertyNsdto currentPropertyNsdto = (PropertyNsdto) InfoModelDescription.COFFEEMACHINE_INFOMODEL_MAP.get(shortName);

       NodeId propertyNodeId = newNodeId(currentPropertyNsdto.getNodeIdTypesNumber());

       //Create PropertyNode
       PropertyTypeNode propertyNode = new PropertyTypeNode(
           getNodeContext(), 
           propertyNodeId, 
           new QualifiedName(propertyNodeId.getNamespaceIndex(), currentPropertyNsdto.getBrowseName()), 
           LocalizedText.english(currentPropertyNsdto.getBrowseName()), 
           LocalizedText.NULL_VALUE, 
           uint(0), 
           uint(0)
       );

       propertyNode.setDataType(
               currentPropertyNsdto.isCustomDataType() ? 
                       newNodeId(currentPropertyNsdto.getCustomDataTypeIdentifier()) : 
               currentPropertyNsdto.getDataType().expanded().toNodeId(getNodeContext().getNamespaceTable()).orElse(NodeId.NULL_VALUE));
       
       propertyNode.setValueRank(ValueRank.Scalar.getValue()); 
       propertyNode.setArrayDimensions(null);
       propertyNode.setMinimumSamplingInterval(currentPropertyNsdto.getMinimumSamplingInterval());
       propertyNode.setAccessLevel(AccessLevel.toValue(currentPropertyNsdto.getAccessLevel()));
       propertyNode.setUserAccessLevel(AccessLevel.toValue(currentPropertyNsdto.getAccessLevel()));
      
       //adding references that this node is a property
       propertyNode.addReference(new Reference(propertyNode.getNodeId(), Identifiers.HasTypeDefinition, Identifiers.PropertyType.expanded(), true));
       if (currentPropertyNsdto.getMandatory()) 
               propertyNode.addReference(new Reference(propertyNode.getNodeId(), Identifiers.HasModellingRule, Identifiers.ModellingRule_Mandatory.expanded(), true));

       //set initial value to zero
       propertyNode.setValue(new DataValue(new Variant(null)));
       //adding to tree
       getNodeContext().getNodeManager().addNode(propertyNode);

       //adding propertyreferences
       currentEventTypeNode.addReference(new Reference(currentEventTypeNode.getNodeId(), Identifiers.HasProperty, createdProperty.getNodeId().expanded(), true));
       createdProperty.addReference(new Reference(createdProperty.getNodeId(), Identifiers.HasProperty, currentEventTypeNode.getNodeId().expanded(), false));

[kevinherron]

After you instantiate an event of this type using the EventFactory are you setting a value for this property? It looks like you have a null value by default.

[jnsw]

You can also just get the property node itself and then call setValue on it.

i did this:

	@Override
	public void invokeCleaningEvent(int severity, String message, CleaningTypeEnumeration cleaningTypeEnumeration){
		try {
			NodeId cleaningEvent_NodeId = someNodeIdGetter;
			NodeId cleaningEvent_CleaningType_NodeId = someNodeIdGetter;

			BaseEventTypeNode event = createEvent(cleaningEvent_NodeId); //createEvent is below

			event.setSeverity(ushort(severity));

			event.setMessage(LocalizedText.english(message));

			QualifiedProperty<CleaningTypeEnumeration> cleaningTypeEnumerationQualifiedProperty = new QualifiedProperty(
				server.getServerNamespace().getNamespaceUri(), 
				"CleaningType", 
				cleaningEvent_CleaningType_NodeId.expanded(), 
				-1, 
				CleaningTypeEnumeration.class
			);

			event.setProperty(cleaningTypeEnumerationQualifiedProperty, cleaningTypeEnumeration);

			server.getEventBus().post(eventNode);

			eventNode.delete();
		} catch (NullPointerException e) {
			GWLogger.error("Got NullPointer in invokeCleaningEvent");
		}
	}

	public BaseEventTypeNode createEvent(NodeId eventTypeId){
		BaseEventTypeNode event = null;
		try {
			UaNode serverNode = server
				.getAddressSpaceManager()
				.getManagedNode(Identifiers.Server)
				.orElse(null);

			event = server.getEventFactory().createEvent(
				new NodeId(server.getServerNamespace().getNamespaceIndex(), UUID.randomUUID()),
				eventTypeId
			);

			// event.setBrowseName(new QualifiedName(1, "TestNodeEvent"));
			// event.setDisplayName(LocalizedText.english("TestNodeEvent"));
			event.setEventId(ByteString.of(new byte[]{0, 1, 2, 3}));
			// event.setEventType(Identifiers.BaseEventType);
			event.setEventType(eventTypeId);
			event.setSourceNode(serverNode.getNodeId());
			event.setSourceName(serverNode.getDisplayName().getText());
			event.setTime(DateTime.now());
			event.setReceiveTime(DateTime.NULL_VALUE);
			event.setMessage(LocalizedText.NULL_VALUE);
			event.setSeverity(ushort(1));
		} catch (Throwable e) {
			GWLogger.error(String.format("Error creating EventNode: %s; %s", e.getMessage(), e));
		}
	}

[jnsw]

Solved: I used the wrong namespace_uri - fyi

---

Okay, I now started to create Classes like
"ProductDispenseEventType" filled with QualifiedProperties and getXYNode, getXY, and setXY method-stubs
and
"ProductDispenseEventTypeNode" and filled with the methods.

I create the Nodes and add them to the type-tree and after that I am adding them to the ObjectTypeManager with

getServer().getObjectTypeManager().registerObjectType(
        currentNode.getNodeId(),
        ProductDispenseEventTypeNode.class,
        ProductDispenseEventTypeNode::new
);

But when I am invoking an event it is still just an SimpleEvent without the self defined properties.

If I am invoking some other event with properties like "ConditionType" I am getting the specific properties - am I missing something?

[devaskim]

@jnsw @kevinherron Is there any success story (example) of adding custom event type to server? (at least with single integer field)