# File lib/keystone/batch/base.rb, line 90
    def send_error_mail(exception)
      if Module.constants.include?("ERROR_MAIL_TO")
        host = Keystone::Os.get()
        title = %|error occur at "#{host.hostname}" [#{error.message}]|
        
        mail_to = ERROR_MAIL_TO
        mail_to = [mail_to] if mail_to.is_a?(String)
        mail_from = Module.constants.include?("ERROR_MAIL_FROM") ?  ERROR_MAIL_FROM : mail_to[0]
        smtp_addr = Module.constants.include?("ERROR_MAIL_STMP_ADDR") ?  ERROR_MAIL_STMP_ADDR : '127.0.0.1'
        smtp_port = Module.constants.include?("ERROR_MAIL_STMP_PORT") ?  ERROR_MAIL_STMP_PORT : 25
        
        body  = "==== error message ====\n\#{exception.message}\n====== backtrace ======\n\#{exception.backtrace.join(\"\\n\")}\n===== environment =====\n\#{host.dump}\n"
        Keystone::Mail::Send.send(mail_from,mail_to,title,body,smtp_addr,smtp_port)
      end
    end