[原]pomelo基础知识(一)

module.exports = function(app) {
  return new Handler(app);
};

var Handler = function(app) {
  this.app = app;
};

/**
 * New client entry.
 *
 * @param  {Object}   msg     request message
 * @param  {Object}   session current session object
 * @param  {Function} next    next step callback
 * @return {Void}
 */
Handler.prototype.entry = function(msg, session, next) {
    var res = this.app.getServersByType(‘connector‘); //获得connector类型服务器 返回值为connector类型服务器的数组
    console.log(res[0].clientPort)
  next(null, {code: 200,host: res[0].host,port: res[0].clientPort});//取第一个connector类型服务器的ip和端口
};

/**
 * Publish route for mqtt connector.
 *
 * @param  {Object}   msg     request message
 * @param  {Object}   session current session object
 * @param  {Function} next    next step callback
 * @return {Void}
 */
Handler.prototype.publish = function(msg, session, next) {
    var result = {
        topic: ‘publish‘,
        payload: JSON.stringify({code: 200, msg: ‘publish message is ok.‘})
    };
  next(null, result);
};

/**
 * Subscribe route for mqtt connector.
 *
 * @param  {Object}   msg     request message
 * @param  {Object}   session current session object
 * @param  {Function} next    next step callback
 * @return {Void}
 */
Handler.prototype.subscribe = function(msg, session, next) {
    var result = {
        topic: ‘subscribe‘,
        payload: JSON.stringify({code: 200, msg: ‘subscribe message is ok.‘})
    };
  next(null, result);
};