public ThreadWithAttributes(Object control,
    Runnable r) 
{
         
        super(r);
        this.control=control;
}

 public final Hashtable getAttributes(Object control) 
{
        return attributes;
}

Generic attributes. You'll need a hashtable lookup - you can use notes for array access.

 public final String getCurrentStage(Object control) 
{
        if( this.control != control ) return null;
        return currentStage;
}

Information about the curent performed operation

 public final Object getNote(Object control,
    int id) 
{
        if( this.control != control ) return null;
        return notes[id];
}

 public final Object getParam(Object control) 
{
        if( this.control != control ) return null;
        return param;
}

Information about the current request ( or the main object we are processing )

 public final Object[] getThreadData(Object control) 
{
        return thData;
}

 public final  void setCurrentStage(Object control,
    String currentStage) 
{
        if( this.control != control ) return;
        this.currentStage = currentStage;
}

 public final  void setNote(Object control,
    int id,
    Object value) 
{
        if( this.control != control ) return;
        notes[id]=value;
}

Notes - for attributes that need fast access ( array ) The application is responsible for id management

 public final  void setParam(Object control,
    Object param) 
{
        if( this.control != control ) return;
        this.param=param;
}

 public final  void setThreadData(Object control,
    Object[] thData) 
{
        this.thData=thData;
}