code: public void setResourceBase(String resourceBase)
      {
          try{
              _resourceBase=Resource.newResource(resourceBase);
              if(log.isDebugEnabled())log.debug("resourceBase="+_resourceBase+" for "+this);
          }
          catch(IOException e)
          {
              log.debug(LogSupport.EXCEPTION,e);
              throw new IllegalArgumentException(resourceBase+":"+e.toString());
          }
      }
docs: Set the Resource Base.
  The base resource is the Resource to use as a relative base
  for all context resources. The ResourceBase attribute is a
  string version of the baseResource.
  If a relative file is passed, it is converted to a file
  URL based on the current working directory.
  @param resourceBase A URL prefix or directory name.