This is a psedu code to show how to get the instance of the trace, dynamic configuration etc. inside the UDF

getInstanceUDF.java

public String getInstanceUDF(Container container) throws StreamTransformationException{
  GlobalContainer globalContainer;
  MappingTrace trace;
  String headerField;
  java.util.Map map;
  
  trace = container.getTrace();
  globalContainer = container.getGlobalContainer();
  map = globalContainer.getTransformationParameters();
  headerField = (String) map.get( StreamTransformationConstants.INTERFACE_NAMESPACE );
  trace.addInfo("INTERFACE_NAMESPACE:" + headerField);
  //Add the rest of the code
}