Database handling with deferreds

db.deferreds.js

var deferred = require('deferred')
  , query = deferred.promisify(DbSource.query).bind(DbSource)
  , write = deferred.promisify(DbDest.write).bind(DbDest)

console.log('[INFO]', 'Starting sequence');

var q = 'SELECT A.* FROM BotCCServer A LIMIT 1';
query(q).map(function (data, i) {
  var row = data[0];
  console.log('[INFO]', 'Each');

  var cncInfo = new CNCInfo();
  cncInfo._id = row.entry_id;
  cncInfo.entry_id = row.entry_id;
  cncInfo.entry_type = row.entry_type;

  console.log('[A]', cncInfo);

  return deferred(fetchMd5(cncInfo), fetchServers(cncInfo)).match(function (md5, servers) {
    console.log('[B]', md5, servers);
    cncInfo.md5 = md5;
    cncInfo.servers = servers;
    return write('botnet_cnc_info', cncInfo);
  });
}).end(function () {
  console.log("All done");
}, null);