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Creating New OPC Server Object From Client Request
February 12, 2014
11:39, EET
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pfay
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Hi,

I am wondering if it is possible for a client to make a request to the server to create an new instance of an object base on a type parameter.

February 12, 2014
16:23, EET
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Jouni Aro
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Yes, that is possible. You can use AddressSpace.addNode() from the client, e.g.

ObjectAttributes nodeAttributes = new ObjectAttributes();
ExpandedNodeId parentNodeId = …
ExpandedNodeId requestedNewNodeId = …
ExpandedNodeId typeDefinitionId = …

AddNodesItem node = new AddNodesItem(parentNodeId,
Identifiers.HasComponent, requestedNewNodeId,
new QualifiedName(requestedNewNodeId.getNamespaceIndex(), NodeClass.Object,
ExtensionObject.binaryEncode(nodeAttributes), typeDefinitionId);
NodeId nodeId = client.getAddressSpace().addNode(node);

Also, you need to ensure that the server enables node management, e.g. with the Java SDK

server.getNodeManagerTable().setNodeManagementEnabled(true);

Note that the server will not by default create the structure of the object. But if you have a Java class that defines the structure, you can register that in the server, e.g.:

myNodeManager.getNodeFactory().registerTypeDefinition(
yourTypeDefinitionId, YourType.class);
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