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| module.exports = function() {
var mysqlobj = require('mysql');
var async = require('async');
var pool = mysqlobj.createPool({
host: 'host',
user: 'user',
password: 'password',
database: "databases",
});
return {
pool:pool,
query:function(sql, param, callback){
if(typeof param == "function"){
callback = param;
param = [];
}
pool.getConnection(function(err, connection) {
if(err){
callback(err, [])
return;
}
try{
connection.query( sql, param, function(err, rows) {
connection.release();
callback(err, rows)
});
}
catch(e){
console.log("数据库查询出错了："+sql);
console.log(param);
console.log(e);
callback("err", null)
}
});
},
startTransaction:function(sqlParamsArr, callback){
pool.getConnection(function(err, connection) {
if(err){
callback(err, [])
return;
}
asyncCallFunctionList = [];
for(var i=0; i<sqlParamsArr.length; i++){
asyncCallFunctionList.push(function(ii){
return function(callbackInner){
connection.query(sqlParamsArr[ii].sql,sqlParamsArr[ii].params , callbackInner);
}
}(i));
}
try{
connection.beginTransaction(function(err) {
if(err) {
callback("err");
}
async.series(asyncCallFunctionList, function(err, result) {
if(err) {
connection.rollback(function() {
callback("err");
});
return ;
}
connection.commit(function(err) {
if (err) {
connection.rollback(function() {
callback("err");
});
}
console.log('事务提交成功!');
callback(null);
});
});
});
}
catch(e){
console.log("数据库查询出错了（事务处理）："+sqlParamsArr);
console.log(e);
callback("err", null)
}
});
},
execSql:function(sql, param, callback){
}
}
}()
|