pomelo链接mysql

2017-01-05 11:10:27来源:oschina作者:梦想游戏人人点击

本文基于上一篇博文(pomelo新建一个服务类型)


需求:玩家购买物品够添加到数据库中,以保存数据


准备工作:


已安装mysql 的windows版本


先安装依赖库
npm install mysql
npm install generic-pool

在app目录下新建dao/mysql/目录,在该目录下新建2个文件


新建文件dao-pool.js
var _poolModule = require('generic-pool');
/*
* Create mysql connection pool.
*/
var createMysqlPool = function(app) {
var mysqlConfig = app.get('mysql');
return _poolModule.Pool({
name: 'mysql',
create: function(callback) {
var mysql = require('mysql');
var client = mysql.createConnection({
host: mysqlConfig.host,
user: mysqlConfig.user,
password: mysqlConfig.password,
database: mysqlConfig.database
});
callback(null, client);
},
destroy: function(client) {
client.end();
},
max: 10,
idleTimeoutMillis : 30000,
log : false
});
};
exports.createMysqlPool = createMysqlPool;
新建文件mysql.js
// mysql CRUD
var sqlclient = module.exports;
var _pool;
var NND = {};
/*
* Init sql connection pool
* @param {Object} app The app for the server.
*/
NND.init = function(app){
_pool = require('./dao-pool').createMysqlPool(app);
};
/**
* Excute sql statement
* @param {String} sql Statement The sql need to excute.
* @param {Object} args The args for the sql.
* @param {fuction} cb Callback function.
*
*/
NND.query = function(sql, args, cb){
_pool.acquire(function(err, client) {
if (!!err) {
console.error('[sqlqueryErr] '+err.stack);
return;
}
client.query(sql, args, function(err, res) {
_pool.release(client);
cb(err, res);
});
});
};
/**
* Close connection pool.
*/
NND.shutdown = function(){
_pool.destroyAllNow();
};
/**
* init database
*/
sqlclient.init = function(app) {
if (!!_pool){
return sqlclient;
} else {
NND.init(app);
sqlclient.insert = NND.query;
sqlclient.update = NND.query;
sqlclient.delete = NND.query;
sqlclient.query = NND.query;
return sqlclient;
}
};
/**
* shutdown database
*/
sqlclient.shutdown = function(app) {
NND.shutdown(app);
};

新建配置文件


新建文件mysql.json
{
"development": {
"host" : "127.0.0.1",
"port" : "3306",
"database" : "pomelo",
"user" : "root",
"password" : ""
},
"production": {
"host" : "127.0.0.1",
"port" : "3306",
"database" : "pomelo",
"user" : "root",
"password" : ""
}
}

准备工作完毕。/******************************************************************************/////

app.js添加以下代码


app.loadConfig("mysql", app.getBase() + "/config/mysql.json"); // 添加配置
app.configure('production|development', "game", function () {
var dbclient = require("./app/dao/mysql/mysql.js").init(app); // 初始化dbclient
app.set("dbclient", dbclient);// dbclient 为外部数据库接口,app,get("dbclient") 来使用
})

修改gameHandler.js的购买接口 buyGoods 函数

handler.buyGoods=function(msg,session,next){
var id=msg.id;
var count = msg.count;///////////////////////////////
console.log("购买物品玩家 uid:" + session.uid);
if (id == "100" && count == 1) {//验证购买条件

//允许购买
var sql = " insert into `goods` (`id`, `owner`) VALUES(?, ?)";

var args = [id, session.uid];
var dbclient = pomelo.app.get('dbclient');//获取全局mysql client
console.log(dbclient);
dbclient.query(sql, args, function (err, res) {//执行sql语句 函数insert和query等效 console.log("......................");
console.log(err + " " + JSON.stringify(res));


console.log("......................");
if (err) { // 数据库操作失败
next(null, { msg: "购买失败,服务器错误!", code: 200 });
}
else {//购买成功
next(null, { msg: "购买物品:#活血丹 成功", code: 200 });
}
} );
}else{ // 不允许购买
next(null,{msg:"你的金币不足,购买失败",code:200});
}
}

运行测试,查看数据库


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