nodeJs socketJs 搭建长连接(2) 项目应用整合
今天我们在这里要说的是wehsocket和node开发长连接问题,我们在真正的项目中,可能要实现的功能不知是简单的聊天功能,我们现在要整合redis,rabbitMQ,等实现o2o的提醒功能:
首先,整合一次redis:
我们建立一个chat文件夹,在其中写入一个package.json文件,用于生成我们的node类库
{
"name": "zefun",
"version": "1.0.0",
"description": "",
"main": "index.js",
"dependencies": {
"apn": "^1.5.2",
"amqp": "^0.2.4",
"co": "^3.0.6",
"co-redis": "^1.1.1",
"log4js": "^0.6.28",
"express": "^4.13.3",
"redis": "^0.10.3",
"redis-sentinel": "^0.1.3",
"socket.io": "^1.3.7"
},
"devDependencies": {},
"author": "",
"license": "ISC"
}
安装结束后,我们会生成一个node_modules的文件,还要在本层的目录创建一个logs的文件夹,因为我们一会会使用一个日志系统进行输出,但是,node只有写文件的权限,没有输出文件夹的权限
新建一个redisClient.js,作为redis的客户端连接
var PORT = 6379;
var HOST = '120.25.254.164';
var redis = require('redis');
var chatClient = redis.createClient(PORT,HOST);
var logger = require("./log").logger("redis");
chatClient.on('error', function(err){
logger.error(err);
});
var chat_sadd = function(key, field) {
chatClient.sadd(key, field);
logger.info("redis sadd --> key : " + key + ", field : " + field);
}
var chat_srem = function(key, field) {
chatClient.srem(key, field);
logger.info("redis srem --> key : " + key + ", field : " + field);
}
var chat_smembers = function(key) {
return chatClient.smembers(key);
}
var chat_hset = function(key, userId, sockedId) {
chatClient.hset(key, userId, sockedId);
logger.info("redis hset --> key : " + key + ", field : " + userId + ", value :" + sockedId);
}
var chat_hget = function(key, userId) {
return chatClient.hget(key, userId);
}
exports.chat_sadd = chat_sadd;
exports.chat_srem = chat_srem;
exports.chat_smembers = chat_smembers;
exports.chat_hset = chat_hset;
exports.chat_hget = chat_hget;下面我们在主js中进行引用和传值即可
var co = require('co');
var wrapper = require('co-redis');
var redis = wrapper(require("./redisClient"));co(function* () {
var userSID = yield redis.chat_hget(USER_SOCKET_KEY, toUser);
io.sockets.connected[userSID].emit('getMessage',{msg:msg});
})();redis.chat_sadd(redis_key,data.userId);此处我们将node作为了rabbit的一个client进行监听和处理程序,首先新建一个mqClient.js作为队列的客户端进行监听
conn.queue('queue_chat_notify', { autoDelete: false, durable: true }, function(queue) {
queue.subscribe(function (msg) {
receiveNotify(msg.data);
});
});
exports.createConnection = function(r1, r2) {
receiveLogout = r1;
receiveNotify = r2;
}var mq = require("./mqClient");
mq.createConnection(receiveNotify);
//rabbitmq监听到通知的回调操作
var receiveNotify = function(msg) {
logger.info("\r\n\r\n<-- receiveNotify begin -->");
sendMsg(msg);
}var amqp = require("amqp");
var exchName = "directExchange";
var connOptions = {
host: '120.25.254.164',
port: 5672,
login: 'zefun',
password: 'zefun'
};
var exchOption = {
type: 'direct',
durable: true,
autoDelete: false,
confirm: false
};
var conn;
var receiveNotify = null;
var logger = require('./log').logger("rabbitmq");
conn = amqp.createConnection(connOptions);
conn.on('ready',function() {
logger.info("rabbitmq is ready ... ");
conn.queue('queue_chat_notify', { autoDelete: false, durable: true }, function(queue) {
queue.subscribe(function (msg) {
logger.info("queue_chat_notify consumer msg : " + msg);
receiveNotify(msg.data);
});
});
});
conn.on('close', function(){
logger.error("rabbitmq is close");
});
conn.on('error', function (error) {
logger.error('Connection error : ' + error);
});
exports.createConnection = function(r1) {
logger.info("createConnection r1 : " + r1);
receiveNotify = r1;
}
exports.publish = function(routeKey, message) {
conn.publish(routeKey, message);
};var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.send('Welcome Realtime Server
');
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
var mq = require("./mqClient");
var co = require('co');
var wrapper = require('co-redis');
var redis = require("./redisClient");
var redisClient = wrapper(redis.chatClient);
var logger = require("./log").logger("server");
var STORE_USER_KEY = "store_to_chat_user_set_";
var USER_SOCKET_KEY = "chat_user_to_socket_hash";
//rabbitmq监听到通知的回调操作
var receiveNotify = function(msg) {
logger.info("\r\n\r\n<-- receiveNotify begin -->");
sendMsg(msg);
}
mq.createConnection(receiveNotify);
io.on('connection', function (socket) {
io.sockets.emit('connect',{hello:'connection success'});
socket.on('sendMsg', function (from,toUser,msg,msgType) {
co(function* () {
var userSID = yield redisClient.hget(USER_SOCKET_KEY, toUser);
io.sockets.connected[userSID].emit('getMessage',{msg:msg});
})();
});
socket.on('initUser',function(data){
var redis_key = STORE_USER_KEY + data.storeId;
//redis插入数据
redisClient.sadd(redis_key,data.userId);
redisClient.hset(USER_SOCKET_KEY, data.userId, socket.id);
logger.info('initUser --->> 门店 :' + data.storeId + ', 用户 : ' + data.userId);
});
socket.on('disconnect', function () {
});
});
var sendMsg = function(obj){
co(function* () {
var socketId = yield redisClient.hget(USER_SOCKET_KEY, obj.toUser);
logger.info("socketId : " + socketId);
io.sockets.connected[socketId].emit("getMessage", obj);
})();
}<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String chatPath = request.getContextPath();
String chatPasePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
+ chatPath + "/";
%>
记得在linux上启动的时候 , 使用 forever start server.js 命令进行启动，可作为守护进程，这样node就不会随着终端的关闭而down掉。。。
到此我们的整套就写完了,最后注意一下日志,如果我们想将现在的类库导入成为package.json的话,在文件夹中使用npm init,自动生成json文件,就可以进行移植
给出一个该项目的下载链接地址 http://download.csdn.net/detail/u014201191/9303347
#特别注意:
在本案例中 io.sockets.connected[socket.id].emit("method",msg) 和 io.sockets.sockets[socket.id].emit("method",msg) 这两个方法都不可用,可以换成: io.to[socket.id].emit("method",msg) 触发传送事件了，好像是TM因为版本的问题。。。