takraj opened a new issue, #1106:
URL: https://github.com/apache/plc4x/issues/1106
### What would you like to happen?
The OPC-UA protocol supports browsing, but the driver does not. Please
implement it, in order to be able to recursively fetch data with the library.
Example code to browse the value tree:
```
DefaultPlcDriverManager driverManager = new DefaultPlcDriverManager();
try (PlcConnection opcuaConnection =
driverManager.getConnection("opcua:tcp://opcuaserver.com:48010")) {
PlcBrowseRequest request = opcuaConnection.browseRequestBuilder()
.addQuery("Folder","ns=2;s=Demo.Static")
.build();
PlcBrowseResponse response = request.execute().get();
System.out.println(response.getValues("Folder"));
}
```
The above program throws the exception below:
```
org.apache.plc4x.java.api.exceptions.PlcUnsupportedOperationException: The
connection does not support browsing
at
org.apache.plc4x.java.spi.connection.AbstractPlcConnection.browseRequestBuilder(AbstractPlcConnection.java:159)
at
org.apache.plc4x.java.opcua.ManualOpcuaFolderNode.main(ManualOpcuaFolderNode.java:32)
```
Example output of another software, that supports browsing:
```
$ uabrowse -u "opc.tcp://opcuaserver.com:48010" -n "ns=2;s=Demo.Static"
WARNING:asyncua.client.client:Requested session timeout to be 3600000ms, got
600000ms instead
Browsing node ns=2;s=Demo.Static at opc.tcp://opcuaserver.com:48010
DisplayName NodeId BrowseName
Value
LocalizedText(Locale='', Text='Arrays') ns=2;s=Demo.Static.Arrays 2:Arrays
LocalizedText(Locale='', Text='Scalar') ns=2;s=Demo.Static.Scalar 2:Scalar
LocalizedText(Locale='', Text='VariableWithNumericNodeId') ns=2;i=4294967294
2:VariableWithNumericNodeId, 12
LocalizedText(Locale='', Text='VariableWithGuidNodeId')
ns=2;g=5ce9dbce-5d79-434c-9ac3-1cfba9a6e92c 2:VariableWithGuidNodeId , 0
LocalizedText(Locale='', Text='VariableWithByteStringNodeId')
ns=2;b=0x61626364 2:VariableWithByteStringNodeId, 0
LocalizedText(Locale='', Text='Matrix') ns=2;s=Demo.Static.Matrix 2:Matrix
```
[Wireshark capture of the above browsing
request](https://github.com/apache/plc4x/files/12708323/opc-ua-browse-request.pcapng.gz)
### Programming Languages
- [X] plc4j
- [ ] plc4go
- [ ] plc4c
- [ ] plc4net
### Protocols
- [ ] AB-Ethernet
- [ ] ADS /AMS
- [ ] BACnet/IP
- [ ] CANopen
- [ ] DeltaV
- [ ] DF1
- [ ] EtherNet/IP
- [ ] Firmata
- [ ] KNXnet/IP
- [ ] Modbus
- [X] OPC-UA
- [ ] S7
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