Question

所以可能是一个非常基本的问题，但是我想要实现的是一个具有实时功能的Web应用程序，使用socket.io和带有tailable游标的mongodb上限集合（正常的mongodb集合也用于持久数据））。

现在让我们假设这个应用程序是一个在线聊天系统，里面有房间，多个用户和消息。

两个主要问题如下：

a) When the first initially joins the app, how/where should the initial set of data (list of chat rooms, maybe a count of users next to them) be loaded from...

    -> persistent mongo storage : db.Rooms.find().orderBy({ date : -1 })
    -> retrieved from "memory", a capped collection, some form of stream....

b) When the second user joins, should their initial set of data be loaded from

    -> either of the first two options for (a) or alternatively  or hit the first client up for their "live" version of data

当第一批用户加入一个让人们聊天的房间时，他们需要将历史记录提升到一定程度......而不是实时数据......可能会查看较旧的消息。等等。

基本上我正在创建socket.io房间，我根据它们所处的“骨干”视图订阅用户，并通过socket.io直接将“实时”数据加载到它们。

我主要是关于初始数据加载，我想正确的架构客户端 - ＆gt;消息队列 - ＆gt; db - ＆gt;消息队列 - ＆gt;客户端的设置

下面的伪代码排序

Initialize App and Sockets

==== assumption: application is called chat, has chat rooms, messages flying about in them ====

User 1 socket connect -> join "chat" 

    sockets requests room list (top X rooms) -> mongo db query?

User 2 socket connect -> join "chat" 

    socket requests room list (top X rooms) -> mongo db query? memcache? tailable cursor?


==== messages exist and are continually being sent to chatRoom1 =====

Users 1 joins "chatRoom1" -> socket notifies others a new user has joined

    socket requests user list and top X messages and Y users

User 2 joins "chatRoom1" -> socket notifies others a new user has joined

    socket requests user list and top X messages and Y users (potentially newer messages that user 1)

New Messages follow this process

    // client event handler on a new message, write to div for the correct room
    Client -> socket.on("new message", function(data) { $("#" + data.room).find("div.messages").append(data.message) }

    // client sending a new message, specifies room name and message
    Client -> socket.emit("new message", { "room" : "chatRoom1", "message" : "contents of the message" }

    // Server receives message and does two things
    // a) sends it to other clients of the same room
    Server -> socket.on("new message", function(data) {  io.sockets.in(data.room).emit("new mesage", data)   } )
    // b) stores it in the collection (capped?)

谢谢！

节点的架构或逻辑，Mongo（上限和持久）Socket.io实时Web应用程序

0 个答案: