handlers

check_letshelp.json

{
  "checks": {
    "letshelp_check": {
      "handlers": ["default","mailer"],
      "command": "/etc/sensu/plugins/check-http.rb -u http://a.b.c/ -r",
      "interval": 90,
      "subscribers": [ "mailservers" ]
    }
  }
}

config.json-handlers

 "handlers": {
     "default": {
       "type": "pipe",
       "command": "/etc/sensu/handlers/default"
     },
     "mailer": {
        "type": "pipe",
        "command": "/etc/sensu/handlers/mailer.rb"
      }
    }