docs: @Bean(destroyMethod = "close")
  	public DataSource dataSource() {
  		String url = "jdbc:derby:directory:target/jpaserver_derby_files;create=true";
  		if (isNotBlank(ContextHolder.getDatabaseUrl())) {
  			url = ContextHolder.getDatabaseUrl();
  		}
  
  		BasicDataSource retVal = new BasicDataSource();
  		retVal.setDriver(new org.apache.derby.jdbc.EmbeddedDriver());
  		retVal.setUrl(url);
  		retVal.setUsername("");
  		retVal.setPassword("");
  		return retVal;
  	}