code: public String getAlias()
      {
          String alias = this.properties.get(BaseWebappServlet.ALIAS);
          if (alias == null)
              alias = this.properties.get(BaseWebappServlet.ALIAS.substring(BaseWebappServlet.PROPERTY_PREFIX.length()));
          return HttpServiceTracker.addURLPath(null, alias);
      }
docs: Get the web context path from the service name.
  @return