Unable to browse property of node in eclipse milo

[ckyara]

Hi,

I am trying to browse to node having properties but it's not working with below Crawler configuration. Can anyone help me that what browsing option should i use to read property/metadata of node.

public void browse(BiFunction<UaNode, List<? extends UaNode>, List<? extends UaNode>> eachNode) {
    try {
      /*AddressSpace.BrowseOptions browseOptions = AddressSpace.BrowseOptions.builder()
              .setReferenceType(Identifiers.References)
              //.setBrowseDirection(BrowseDirection.Both)
              .build();
      client.getAddressSpace().setBrowseOptions(browseOptions);*/
      recurse(client.getAddressSpace().getNode(startId()), config.depth(), eachNode).join();
    } catch (UaException e) {
      throw unchecked(e);
    }
  }
private CompletableFuture<Void> recurse(UaNode parent,
                                          int level,
                                          BiFunction<UaNode, List<? extends UaNode>, List<? extends UaNode>> nodeConsumer) {
    return level <= 0 ? allOf()
      : parent.browseNodesAsync().thenCompose(children ->
      allOf(
        nodeConsumer.apply(parent, nodeFilter.apply(children)).stream()
          .map(child -> recurse(child, level - 1, nodeConsumer))
          .toArray(CompletableFuture[]::new)));
  }

need to read node having Browsename ending with LoRange details as below:
ParentId: ns=2;s=M|FIKOGATEWAY1, ChildId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:AI_blank.S6_2_Reali.IP_VALUE, Value: 0.0, DataType: ns=0;i=10, NodeClass: Variable, JavaClass: UaVariableNode, Description: A fixed area field.
ParentId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, ChildId: ns=2;s=A|105|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE.LoRange, Value: 0.0, DataType: ns=0;i=11, NodeClass: Variable, JavaClass: PropertyTypeNode, Description: Low instrument range

[kevinherron]

Can you fix up your code formatting?

The default browse options should already allow browsing to a Property Node. Maybe your configured depth isn't large enough?

[ckyara]

Hi Kevin,

Thanks for your reply. I have configured depth = 100. When tried to browse with below code then i am able to browse property node.

browseNode("", client, Identifiers.ObjectsFolder);

private void browseNode(String indent, OpcUaClient client, NodeId browseRoot) {
    try {
      List<? extends UaNode> nodes = client.getAddressSpace().browseNodes(browseRoot);
      for (UaNode node : nodes) {
        System.out.println("BroseName : "+node.getBrowseName().getName());
        // recursively browse to children
        browseNode(indent + "  ", client, node.getNodeId());
      }
    } catch (UaException e) {
      throw unchecked(e);
    }
  }

It seems like issue is due to record filtering with below logic:

public List<? extends UaNode> scanAndCreate(UaNode parent, List<String> path, List<? extends UaNode> children, Consumer<CompletableFuture<Asset>> objects) {
  if (ObjectsFolder.equals(parent.getNodeId())) { // only descend from Objects into ApisHive nodes.
    children.removeIf(c -> !apis.equals(c.getBrowseName()));
    return children;
  }
  if (apis.equals(parent.getBrowseName())) { // descend into controllers. Nothing to create at Apis level.
    children.removeIf(c -> !c.getBrowseName().getName().startsWith("FIKOGATEWAY"));
    return children;
  }
  groupByTag(children);
  createObjects(path, objects);
  return emptyList(); // no need to recurse into any child.
}

OPCUA Dump:

2022-11-10 06:35:07.710 INFO: ParentId: ns=0;i=85, ChildId: ns=0;i=2253, BrowseName: 0:Server, Value: , DataType: , NodeClass: Object, JavaClass: ServerTypeNode, Description:
2022-11-10 06:35:07.710 INFO: ParentId: ns=0;i=85, ChildId: ns=2;s=H|ApisHive, BrowseName: 2:ApisHive, Value: , DataType: , NodeClass: Object, JavaClass: BaseObjectTypeNode, Description:
2022-11-10 06:35:07.774 INFO: ParentId: ns=2;s=H|ApisHive, ChildId: ns=2;s=M|CnxMgr, BrowseName: 2:CnxMgr, Value: , DataType: , NodeClass: Object, JavaClass: BaseObjectTypeNode, Description: Module used to define connections to remote services
2022-11-10 06:35:07.775 INFO: ParentId: ns=2;s=H|ApisHive, ChildId: ns=2;s=M|FIKOGATEWAY1, BrowseName: 2:FIKOGATEWAY1, Value: , DataType: , NodeClass: Object, JavaClass: BaseObjectTypeNode, Description: This module connects to an OPC server, and provides access to OPC items.
2022-11-10 06:35:07.775 INFO: ParentId: ns=2;s=H|ApisHive, ChildId: ns=2;s=M|FIKOGATEWAY2, BrowseName: 2:FIKOGATEWAY2, Value: , DataType: , NodeClass: Object, JavaClass: BaseObjectTypeNode, Description: This module connects to an OPC server, and provides access to OPC items.
2022-11-10 06:35:14.092 INFO: ParentId: ns=2;s=M|FIKOGATEWAY1, ChildId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:AI_blank.S6_2_Reali.IP_VALUE, Value: 0.0, DataType: ns=0;i=10, NodeClass: Variable, JavaClass: UaVariableNode, Description: A fixed area field.
2022-11-10 06:37:15.969 INFO: ParentId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, ChildId: ns=2;s=A|2|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE.Value, Value: 0.0, DataType: ns=0;i=10, NodeClass: Variable, JavaClass: PropertyTypeNode, Description: Item value
2022-11-10 06:37:15.970 INFO: ParentId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, ChildId: ns=2;s=A|104|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE.HiRange, Value: 100.0, DataType: ns=0;i=11, NodeClass: Variable, JavaClass: PropertyTypeNode, Description: High instrument range
2022-11-10 06:37:15.970 INFO: ParentId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, ChildId: ns=2;s=A|105|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE.LoRange, Value: 0.0, DataType: ns=0;i=11, NodeClass: Variable, JavaClass: PropertyTypeNode, Description: Low instrument range
2022-11-10 06:37:15.970 INFO: ParentId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, ChildId: ns=2;s=A|5800|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE.Text1, Value: This attribute is project specific., DataType: ns=0;i=12, NodeClass: Variable, JavaClass: PropertyTypeNode, Description: This attribute is project specific. Refer to the system manual for the description of this attribute.
2022-11-10 06:37:15.970 INFO: ParentId: ns=2;s=V|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, ChildId: ns=2;s=A|5801|FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE, BrowseName: 2:FIKOGATEWAY1.AI_blank.S6_2_Reali.IP_VALUE.Text2, Value: 14, DataType: ns=0;i=12, NodeClass: Variable, JavaClass: PropertyTypeNode, Description: This attribute is project specific. Refer to the system manual for the description of this attribute.

[ckyara]

Now i can browse property node with default browsing option after some changes in node filteratation logic.