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

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writevalues using the legacy java stack
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Georges ATTALI
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08/19/2020
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08/19/2020 - 03:10
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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.
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