nyx_server/db/connection-mysql.js

Node内容发布

var mysql = require("mysql");
var util = require("util");
var baseConnect = require("./Connection");
var Promise = require("bluebird");

function Connection(connectParams, pool) {
    baseConnect.apply(this, arguments);
}

util.inherits(Connection, baseConnect);

Connection.prototype._create = function(connectParams) {
    var connection = mysql.createConnection(connectParams);
    //console.log("connect" , connection);
    if (this.pool) {
        var _self = this;
        connection.on('error', function(err) {
            console.log('db error', err);
            if (err.code === 'PROTOCOL_CONNECTION_LOST') { // Connection to the MySQL server is usually
                //_self.pool && _self.pool.close(_self);     // lost due to either server restart, or a
                _self.close(); //关闭当前链接
            }
        });
    }
    return connection;
};

Connection.prototype.query = function(sql, values) {
    var self = this;
    return new Promise(function(resolve, reject) {
        var fn = function(err, result) {
            if (err) {
                console.log("query connection err", err.stack);
                console.log("query connection err:" + err.code, err.stack);
                if (err.fatal) {
                    console.log("query err.fatal")
                    self.close();
                }
                reject(err);
            } else {
                resolve(result);
            }
        };
        self.connection.query(sql, values, fn);
    });
};


Connection.prototype.vaild = function() {
    var _self = this;
    return this.query("select 1 from dual").then(function() {
        return true;
    }).catch(function(err) {
        return false;
    });
};

module.exports = Connection;