node-mysql無法處理多個查詢？

Question

我正在使用：node-mysql

arrtickers得到了大約200個值。

arrtickers關閉將值傳入sym。

符號將值傳遞給每個功能在這裏（在異步模式下運行時，每個FN將開始自己的運行，而無需等待前面的FN鍵完成）

問題是MySQL的似乎無法處理多個呼叫？

events.js:48 
     throw arguments[1]; // Unhandled 'error' event 
        ^
Error: reconnection attempt failed before connection was fully set up 
    at Socket.<anonymous> (/home/ubuntu/node/node_modules/mysql/lib/client.js:67:28) 
    at Socket.emit (events.js:64:17) 
    at TCP.onread (net.js:398:51) 


     arrtickers.forEach(function(value) { 

      var sym= value; 


      (function(sym) { 

        url2= "http://test2.com/quote.ashx?t="+sym+"&ty=c&ta=1&p=d&b=1"; 

        request({ uri:url2 }, function (error, response, body) { 

         jsdom.env({ 
         html: body, 
         scripts: [ 
          jqlib 
         ] 
         }, function (err, window) { 

         var $ = window.jQuery; 
         var data= $('body').html(); 
         //some scrapping 

         var client2 = mysql.createClient({ 
          user: 'root', 
          password: '123', 
          host: '127.0.0.1', 
          port: '3306' 
         }); 

         client2.query('USE testtable'); 

         sql= "update tbla SET a='"+a+"', b='"+b+"', c='"+c+"', d='"+d+"' where ticker='"+sym+"'"; 

         client2.query( 
          sql, function(err, info){ 

           if (err) { 
            throw err; 
           } 
          } 
         ); 

         client2.end(); 


         }); 
        }); 

      })(sym); 



      (function(sym) { 

        url= "http://test3.com/quote.ashx?t="+sym+"&ty=c&ta=1&p=d&b=1"; 

        request({ uri:url3 }, function (error, response, body) { 

         jsdom.env({ 
         html: body, 
         scripts: [ 
          jqlib 
         ] 
         }, function (err, window) { 

         var $ = window.jQuery; 
         var data= $('body').html(); 
         //some scrapping 

         var client3 = mysql.createClient({ 
          user: 'root', 
          password: '123', 
          host: '127.0.0.1', 
          port: '3306' 
         }); 

         client3.query('USE testtable'); 

         sql= "update tbla SET a='"+a+"', b='"+b+"', c='"+c+"', d='"+d+"' where ticker='"+sym+"'"; 

         client3.query( 
          sql, function(err, info){ 

           if (err) { 
            throw err; 
           } 
          } 
         ); 

         client3.end(); 


         }); 
        }); 

      })(sym); 






      (function(sym) { 

        url= "http://test4.com/quote.ashx?t="+sym+"&ty=c&ta=1&p=d&b=1"; 

        request({ uri:url4 }, function (error, response, body) { 

         jsdom.env({ 
         html: body, 
         scripts: [ 
          jqlib 
         ] 
         }, function (err, window) { 

         var $ = window.jQuery; 
         var data= $('body').html(); 
         //some scrapping 

         var client4 = mysql.createClient({ 
          user: 'root', 
          password: '123', 
          host: '127.0.0.1', 
          port: '3306' 
         }); 

         client4.query('USE testtable'); 

         sql= "update tbla SET a='"+a+"', b='"+b+"', c='"+c+"', d='"+d+"' where ticker='"+sym+"'"; 

         client4.query( 
          sql, function(err, info){ 

           if (err) { 
            throw err; 
           } 
          } 
         ); 

         client4.end(); 


         }); 
        }); 

      })(sym); 



      //same function repeat for test5.com, test6.com, test7.com, test8.com, test9.com 



     }); 

下面是client.js （節點的MySQL的一部分），我真的不明白，整個過程是如何被聯繫在一起，任何想法的傢伙代碼的一部分？

Client.prototype._connect = function() { 
    this.destroy(); 

    var socket = this._socket = new Socket(); 
    var parser = this._parser = new Parser(); 
    var self = this; 

    socket 
    .on('error', this._connectionErrorHandler()) 
    .on('data', parser.write.bind(parser)) 
    .on('end', function() { 
     if (self.ending) { 
     // @todo destroy()? 
     self.connected = false; 
     self.ending = false; 

     if (self._queue.length) { 
      self._connect(); 
     } 

     return; 
     } 

     if (!self.connected) { 
     this.emit('error', new Error('reconnection attempt failed before connection was fully set up')); 
     return; 
     } 

     self._connect(); 
    }) 
    .connect(this.port, this.host); 

    parser.on('packet', this._handlePacket.bind(this)); 
}; 

Answer 1

您可以使用node-mysql-queues模塊，它是您正在使用的當前模塊的包裝。這裏是信息：https://github.com/bminer/node-mysql-queues

樣品多查詢從他們的網頁：

var q = client.createQueue(); 
q.query(...); 
q.query(...); 
q.execute(); 

client.query(...); //Will not execute until all queued queries (and their callbacks) completed.