构建实时Web应用的Node.js框架：Nombo

jopen 11年前

Nombo 是一个开源 Node.js 框架，用来构建实时的 web 应用和丰富可伸缩的云应用。

关键特性：

Scalability

Nombo is launched as multiple node processes - This is all automated; you just specify how many load balancers, workers and stores to use and Nombo takes care of deployment and management. This lets you use all CPU cores on your machine/instance.
Worker processes are highly parallelized (share literally no resources - User data is bound only to the workers which need it) - This offers almost infinite vertical scalability.

Asset Delivery

All HTTP assets are automatically minified and gzipped to reduce file size.
Server side caching greatly minimizes disk IO operations.
Strong client side caching greatly decreases application load time on subsequent visits and reduces the stress on your server.
Nombo lets you bundle scripts, templates, stylesheets and images (images referenced in the CSS are also automatically loaded and cached).
Customizable preload screen which shows accurate loading percentage when your app is accessed for the first time.

Realtime IO

From inside your client-side scripts you can call methods of server-side CommonJS modules called sims (Server Interface Modules). These let your clients easily interact with your backend.
From inside sims you can react to client input by emitting events to particular sockets or sessions (a session is associated with a group of sockets belonging to the same client) or broadcast to all connected sockets.
You can define middleware functions for various client-server interactions. For example there are middleware segments for dealing with HTTP requests and some for dealing with IO (socket) requests.
You can easily store volatile in-memory data through a session object. This data will automatically be mapped to one of possibly multiple data stores based on your session ID.

Reliability

Multiple workers provide a more consistent performance.
Worker crashes are completely transparent to clients. The worker is automatically respawned - All session data and server event handlers are kept intact.

Code Structure

Client side scripts can be loaded statically (at compile time) or dynamically (at runtime).
Client scripts have the same structure as server-side Node.js modules and Nombo SIMs (CommonJS) - Like Node.js modules, each script operates in its own isolated scope.
Allows you to import scripts which have global scope (e.g. jQuery, jQuery UI, Backbone, AngularJS...) - In Nombo, these are referred to as libs (libraries).