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One of the goals of JavaScript on the server is to provide a natural and easy-to-learn environment for developers who are familiar with client-side JavaScript programming in browsers. We'll also want to be able With this, we want to reuse the existing Infusion components and framework without having to modify the code to run on the server.

John Resig's Env.js provides us with the ability to support common JavaScript browser features that are typically missing on the server, including the DOM, local and remote AJAX, and the use of libraries such as jQuery. Inevitably, only a subset of these tools will remain features are relevant on the server, but Env.js ensures maximal we can heavily reuse of existing code, making it easy to start developing in this new server-side environment quickly.

Tying it all Together: Kettle

The Engage services layer will weave together a variety handful of existing technologies to create a new server-side Web development framework called Kettle:

  • Rhino + Servlets for the Web container
  • JSGI for portability
  • Env.js for standard library features and browser compatibiltiy.
  • Infusion for application development

Using Rhino and Servlets, we can easily establish a JavaScript-based Web container, and we'll follow the JSGI spec to ensure its portability to v8cgi and other environments. Env.js will provide us with an interface for standard tasks such as making HTTP requests and file manipulation on the server, all wrapped in a browser-like API familiar to most JavaScript developers. Fluid Infusion will provide us with a framework for most common application framework features such as data binding and events.

The only substantial new code we'll need write is a URL routing scheme, most likely inspired by CherryPy's approach. With this, Kettle will offer a full-featured framework for server-side development.

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