writevalues using the legacy java stack|OPC UA Implementation: Stacks, Tools, and Samples|Forum|OPC Foundation

Hello,

I would like to write values to my OPCUA server from client, but I don't understand well the use of RequestHeader and its authenticationToken. 

I haven't been able to find examples in Java. 

The code I wrote until now is : 

  public EnvoyerValeursACapsem (WriteValue[] tWriteValue) {

    // comment renseigner AuthenticationToken ???

    // NodeId authenticationToken = Identifiers.RootFolder;

    NodeId authenticationToken = null;

 

    RequestHeader requestHeader 

      = new RequestHeader(authenticationToken   // NodeId AuthenticationToken

                                         , null                // DateTime Timestamp

                                         , null                // UnsignedInteger RequestHandle

                                         , null                // UnsignedInteger ReturnDiagnostics

                                         , null                // String AuditEntryId

                                         , null                // UnsignedInteger TimeoutHint

                                         , null);              // ExtensionObject AdditionalHeader

 

    WriteRequest  writeRequest  = new WriteRequest(requestHeader, tWriteValue);

    try {

      WriteResponse response = mSession.Write(writeRequest);

    }

    catch (Exception e) {

        // manage exception ...

    }   

 

Help please !
Is that correct ? What should I use as authenticationToken  ?

Many Thanks.