Get all nodes from sever.

[Yoshibeatsu]

Hi, it might be not common practice but i need to get all the opc nodes from one server. I couldn't find an example which is getting all the nodes and also is using certificates and user login as well. I'm quite new to programming especially python. The nodes are in folders and sub sub folders. So I think i need to make a recursive search ...

I tried already to develop something in C# with the libary by the opc foundation. It worked on my develop system but ran into a timeout after a while on a real opc server....

Thank you guys in advance

[oroulet]

You got a timeout because trying to get all nodes does not make any sense. Try to search the net, you are not the first one to try

[Yoshibeatsu]

I got this request from my project manager. It wasn't my idea. I already search the net and couldn't find a good way to solve this issue. Might be easier for you sir to solve this issue but I'm quite new at programming as I said. Sorry for asking a question which seems to be obsolete for you but this is a real problem for me

[duxt3r]

I'm not certain weather this approach is what your looking for but I'm using the following recursive function to loop through all elements of a server to display them as a Treeview

client = Client("opc.tcp://localhost:4840/freeopcua/server/")
client.connect()
root = client.get_root_node()
get_server_tree_recursive(client, root)

def get_server_tree_recursive(client, parent):
    children = client.get_node(parent).get_children()
    if children:
        for child in children:
            child_id = client.get_node(child)
            parent_id = client.get_node(parent)
            print(child_id.get_display_name()._text ' is child of ', parent_id.get_display_name()._text)
            get_server_tree_recursive(client, child)
    else:
        return 0

[AndreasHeine]

remember you can browse up (inverse) and down!

[duxt3r]

I can't quit follow what you criticize. In my understanding I'm working through the nodes step by step, only having its parents loaded (which mostly are not millions). I'm only printing or in my case storing their display names not the whole node-class instance.
Could you maybe specify which part of the code concerns you?

[AndreasHeine]

Root childs are:
-Objects (kind of a better startpoint because it contains instances rather then definitions/declarations)
-Types (normative nodes from spec. or "companion specs" / "XML imports" which are the largest part of the nodes on a server)
-Views (might contain duplicates to Objects recursive childs)

[AndreasHeine]

your code creates a lot of requests in a short period of time! and your not doing anything with the stuff you found even if you build a tree to display (you need to store the result somewhere) which need a lot of memory... like i mentioned UaExpert shows you a tree as well but it uses the click and select events to browse/read thru the addressspace while the user go thru the tree

[duxt3r]

I'm really sorry but I don't get what you're trying to say.