<pre>
        var mysql = require('mysql');
        var datasource = mysql.createPool({
            host : 'localhost',
            user : 'test',
            database:'test'
        });

        var MysqlDao = require('./dao.js');
        var dao = MysqlDao({datasource:datasource});

        dao.doIntransaction(function(callback){
            dao.currentConnection.query('insert into tbl_test set ?',{name:'tarsen',age:10},callback);
        },function(err,result){
            console.log(err);
            console.log(result);
        });

        dao.insert('tbl_test',{name:'tarsen',age:10},function(err,result){
            console.log(err);
            console.log(result);
        });

        dao.update('tbl_test',1,{name:'tarsean_new'},function(err,result){
            console.log(err);
            console.log(result);
        });

        dao.delete('tbl_test',8,function(err,result){
            console.log(err);
            console.log(result);
        });
   </pre>
</p>

<p>
   advanced usage:
   if the tasks must executed in order,you set the options.execute

   <pre>
     var MysqlDao = require('./dao.js');
     var dao = MysqlDao({datasource:datasource,execute:'waterfall'});
     the value of execute can be : parallel(default),series,waterfall

     when use waterfall,the previous result will be passed to the next one
   </pre>
</p>