mongodb health checker

app.js

var isAlive = require("./is-alive");
var Config = require("./config");

var app = new isAlive(Config.mongodb)
  .mail(Config)
  .success(function (db) {
    console.log("[IS-ALIVE] alive!");
    this.setStatus(false);
    db.close();
  })
  .error(function (e) {
    console.log("[IS-ALIVE] not alive :<");
    if (!this.getStatus()) {
      this.send(e.message);
    }
  })
  .connect()
  .job(Config.interval);

config.json

{
  "mongodb": "",
  "email": {
    "user": "",
    "password": "",
    "host": "",
    "ssl": false
  },
  "subject": "is-alive reporter",
  "to": "",
  "from": "",
  "interval": 5000
}

is-alive.js

var MongoDB = require('mongodb');
var EmailJS = require("emailjs");

var isAlive = function (url) {
  this.client = MongoDB.MongoClient;
  this.url = url;
  this.status = false;
  return this;
};

isAlive.prototype.connect = function () {
  if (!!this.done && !!this.fail) {
    this.client.connect(this.url, (function (e, db) {
      !!e ? this.fail(e) : this.done(db);
    }).bind(this));
    return this;
  } else {
    throw new Error("success or error callback not defined.");
  }
};
/**
 * @param {String} options.email
 * @param {String} options.to
 * @param {String} options.from
 * @param {String} options.subject
 */
isAlive.prototype.mail = function (options) {
  this.server = EmailJS.server.connect(options.email);
  this.to = options.to;
  this.from = options.from;
  this.subject = options.subject;
  return this;
};

isAlive.prototype.success = function (success) {
  this.done = success.bind(this);
  return this;
};

isAlive.prototype.error = function (error) {
  this.fail = error.bind(this);
  return this;
};

isAlive.prototype.getStatus = function () {
  return this.status;
};

isAlive.prototype.setStatus = function (status) {
  this.status = status;
};

isAlive.prototype.send = function (message) {
  this.server.send({
    text: this.subject, from: this.from,
    to: this.to, subject: this.subject,
    attachment: [{data: message, alternative: true}]
  }, (function (err, out) {
    if (err) {
      console.error("[IS-ALIVE] error", err.smtp);
    } else {
      console.log("[IS-ALIVE]", out.header.to);
      this.setStatus(true);
    }
  }).bind(this));
};

isAlive.prototype.job = function (interval) {
  setInterval(this.connect.bind(this), interval);
  return this;
};

module.exports = isAlive;

package.json

{
  "name": "is-alive",
  "version": "0.0.1",
  "private": true,
  "dependencies": {
    "mongodb": "2.1.14",
    "emailjs": "1.0.4"
  }
}