Example of data buckets logged by emqttd to mongodb

mongodump.js

module.exports = [
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_client_connected",
    "date" : ISODate("2016-10-19T13:34:30.134Z"),
    "client_id" : "C_1476884060951"
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_client_disconnected",
    "date" : ISODate("2016-10-19T13:35:01.678Z"),
    "client_id" : "C_1476884060951"
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_client_subscribe",
    "date" : ISODate("2016-10-19T13:34:30.135Z"),
    "client_id" : "C_1476884060951",
    "username" : "admin",
    "topic_table" : [
      {
        "$client/C_1476884060951" : [
          {
            "qos" : 1
          }
        ]
      },
      {
        "$user/%u" : [
          {
            "qos" : 1
          }
        ]
      }
    ]
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_session_created",
    "date" : ISODate("2016-10-19T13:34:30.069Z"),
    "client_id" : "C_1476884060951",
    "username" : "admin"
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_session_subscribed",
    "date" : ISODate("2016-10-19T13:34:30.146Z"),
    "client_id" : "C_1476884060951",
    "username" : "admin",
    "topic_and_opts" : {
      "topic" : "$client/C_1476884060951",
      "opts" : [
        {
          "qos" : 1
        }
      ]
    }
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_session_terminated",
    "date" : ISODate("2016-10-19T13:35:01.679Z"),
    "client_id" : "C_1476884060951",
    "username" : "admin",
    "reason" : "normal"
  },
  {
    "_id" : ObjectId("580776c2831529059100000f"),
    "type" : "on_message_publish",
    "date" : ISODate("2016-10-19T13:36:02.563Z"),
    "message" : {
      "id" : "\u0000\u0005?7��Lcp\u0005\u0000\u0000\u0004�\u0000\u0001",
      "pktid" : null,
      "from" : {
        "client_id" : "C_1476884060951",
        "username" : "admin"
      },
      "qos" : 0,
      "retain" : false,
      "dup" : false,
      "topic" : "/World"
    }
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_message_delivered",
    "date" : ISODate("2016-10-19T13:36:02.565Z"),
    "client_id" : "C_1476884060951",
    "username" : "admin",
    "message" : {
      "id" : "\u0000\u0005?7��Lcp\u0005\u0000\u0000\u0004�\u0000\u0001",
      "pktid" : null,
      "from" : {
        "client_id" : "C_1476884060951",
        "username" : "admin"
      },
      "qos" : 0,
      "retain" : false,
      "dup" : false,
      "topic" : "/World"
    }
  },
  {
    "_id" : ObjectId("<obj_id>"),
    "type" : "on_session_created",
    "date" : ISODate("2016-10-19T13:34:30.069Z"),
    "client_id" : "C_1476884060951",
    "username" : "admin"
  },
];