How to handle structure change on opc server

[michalkelnar]

I am using milo 1.0.6 and reading structure from opc server with DataTypeDefinition converting it to DynamicStructType and then processing it further. This structure is not known to me ahead of time and can be changed dynamically while we are connected to the server. When it changes I get an error during decode. Is there a way how to force milo to reload all DataTypeDefinition codecs without reconnection?

[kevinherron]

Call OpcUaClient::readDataTypeTree and it will reset/re-read from the Server.

[kevinherron]

Hmm, wonder if there needs to be a way to reset the DataTypeManager though...

[michalkelnar]

With OpcUaClient::readDataTypeTree I will not get error when I add an element in a structure (but it's not present when I read), but when i remove element decode still fails. If there was a way how to reload structures on the fly that would be great.

[kevinherron]

I will look into this in the coming week.

[kevinherron]

@michalkelnar I think you can accomplish this reset right now by doing something like:

// reset DataTypeTree
client.readDataTypeTree();

// reset dynamic DataTypeManager
client.setDataTypeManagerInitializer(new DefaultDataTypeManagerInitializer());

a little clunky, but will work until something better is available.