Problems with recursive path of the inventory (c# and web services)

For starters, let me say that my goal was to write a piece of code that would take the ManagedObjectReference (MOR) of HostSystem when given the MOR in the folder root ESXi system.

However I can't get this to work with recursion at all. I could just manually each way (no recursion), but because I need to work with the web services SDK much, I really want to get this working.

I usually get exceptions like "traversal spec labeled" or "invalid type. Invalid type is caused by an error in the capitalization of the letters in the TraversalSpec.type property. But why it tells me I have a "labeled traversal spec' when I took care to specify the names in each TraversalSpec.

Can anyone provide an example on how to set up a PropertyFilterSpec to browse from the folder root to HostSystem using recursive calls via SelectionSpec?

Below is some of my code relating to the crossing of the inventory. It's a mess right now and not exactly set up for recursive as calls I kept trying different things to make it work.

Help is greatly appreciated.

               ObjectSpec objSpec = new ObjectSpec();
            PropertySpec pSpec = new PropertySpec();
            PropertyFilterSpec pFilterSpec = new PropertyFilterSpec();

            SelectionSpec sSpec = new SelectionSpec();
            sSpec.name = "travelFolder";

            SelectionSpec sSpec2 = new SelectionSpec();
            sSpec.name = "travelDCtoFolder";

            TraversalSpec travelDCtoFolder = new TraversalSpec();
            travelDCtoFolder.name = "travelDCtoFolder";
            travelDCtoFolder.skip = false;
            travelDCtoFolder.type = "Datacenter";
            travelDCtoFolder.path = "hostFolder";
            travelDCtoFolder.selectSet = new SelectionSpec[] { new SelectionSpec() };
            travelDCtoFolder.selectSet[0].name = "travelFolder";

            TraversalSpec travelCRtoHF = new TraversalSpec();
            travelDCtoFolder.name = "travelCRtoHF";
            travelDCtoFolder.skip = false;
            travelDCtoFolder.type = "ComputeResource";
            travelDCtoFolder.path = "host";

            TraversalSpec travelFolder = new TraversalSpec();
            travelFolder.name = "travelFolder";
            travelFolder.type = "Folder";
            travelFolder.path = "childEntity";
            travelFolder.skip = false;
            travelFolder.selectSet = new SelectionSpec[] { };



            objSpec.obj = hostMOR;
            objSpec.skip = false;
            objSpec.selectSet = new SelectionSpec[] { travelFolder, travelDCtoFolder, travelFolder, travelCRtoHF };

            pSpec.type = "ManagedEntity";
            pSpec.pathSet = new string[] { "name" };

            pFilterSpec.objectSet = new ObjectSpec[] { objSpec };
            pFilterSpec.propSet = new PropertySpec[] { pSpec };

Here is an example in Java in VI it is must show the way:

        TraversalSpec findHosts = new TraversalSpec();
        findHosts.setType("ComputeResource");
        findHosts.setPath("host");

        SelectionSpec recurseFolders = new SelectionSpec();
        recurseFolders.setName("FolderParent");

        TraversalSpec findClusters = new TraversalSpec();
        findClusters.setType("Datacenter");
        findClusters.setPath("hostFolder");
        findClusters.setSelectSet(new SelectionSpec[] {recurseFolders} );

        TraversalSpec findFolders = new TraversalSpec();
        findFolders.setName("FolderParent");
        findFolders.setType("Folder");
        findFolders.setPath("childEntity");
        findFolders.setSkip(Boolean.FALSE);
        findFolders.setSelectSet(new SelectionSpec[] { recurseFolders, findClusters, findHosts });

        ObjectSpec searchFromRoot = new ObjectSpec();
        searchFromRoot.setObj(si.getRootFolder().getMOR());
        searchFromRoot.setSelectSet(new SelectionSpec[] { findFolders });

        PropertySpec reportHostName = new PropertySpec();
        reportHostName.setType("HostSystem");
        reportHostName.setPathSet(new String[] { "name" });

        PropertyFilterSpec pfSpec = new PropertyFilterSpec();
        pfSpec.setObjectSet(new ObjectSpec[] { searchFromRoot });
        pfSpec.setPropSet(new PropertySpec[] { reportHostName });

        PropertyCollector pc = si.getPropertyCollector();
        ObjectContent[] ocs = pc.retrieveProperties(new PropertyFilterSpec[] { pfSpec });

        if (ocs != null) {
            for (ObjectContent oc : ocs) {
                ManagedObjectReference dc = oc.getObj();
                DynamicProperty[] props = oc.getPropSet();
                if (props != null && props.length == 1) {
                    String name = (String) props[0].getVal();
                    System.out.println("Found " + dc.getType() + " name is '" + name + "'");
                }
            }
        }

It's a bit old, so I don't know I can explain it all, but here goes.

First of all, the ObjectSpec specifies the root folder as starting point, with the 'findFolders' TraversalSpec tell what to look for from there.

Second place, findFolders, which specifies a found file, select the objects in its list of childEntity.

If the selected child object of a folder is another folder, the SelectionSpec 'recurseFolders' will point to "findFolders" looking for the child.

If the selected child object of a record is a data center, "findClusters" will choose its object 'hostFolder' and again use "recurseFolders" looking for this folder.

If the selected child object of a record is a ComputeResource, he will choose the objects in his list of 'host' and look no further.

Tags: VMware

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