.. _pages/server/overview:

Server Overview
***************

This page is an overview of %{qooxdoo}'s server capabilities. It shows which parts of %{qooxdoo} can be used in a server environment or comparable scenario. It also serves as an introduction to all interested in using %{qooxdoo} on a %{JS} server environment.


.. _pages/server/overview#included_features:

Included Features
=================

This listing shows the core features of the *%{qooxdoo} %{Server}* package. If you build your own package with the skeleton way of using %{qooxdoo}, the feature set might be extended depending on your application code.

* :doc:`Object Orientation </pages/core/oo_introduction>`

  * :doc:`Classes </pages/core/classes>`
  * :doc:`Mixins </pages/core/mixins>`
  * :doc:`Interfaces </pages/core/interfaces>`
  * :doc:`Properties </pages/core/understanding_properties>`
* :doc:`Events </pages/desktop/event_layer_impl>`
* :doc:`Single Value Binding </pages/data_binding/single_value_binding>`

Most of the features can be found in %{qooxdoo}'s core layer and should be familiar to %{qooxdoo} developers.

.. _pages/server/overview#supported_runtimes:

Supported Runtimes
==================

We currently support two types of runtimes:

* `node.js <http://nodejs.org/>`_
* `Rhino <http://www.mozilla.org/rhino/>`_

.. _pages/server/overview#basic_example:

Installation
============
See :doc:`Requirements <requirements>` for details on how to obtain and install %{qooxdoo} %{Server}.

Basic Example
=============
The following example shows how to use the *%{qooxdoo} %{Server}* package in a node environment, having installed the package via npm.

::

  var qx = require('%{qooxdoo}');

  // create anmial class
  qx.Class.define("my.Animal", {
    extend : qx.core.Object,
    properties : {
      legs : {init: 4}
    }
  });

  // create dog class
  qx.Class.define("my.Dog", {
    extend : my.Animal,
    members : {
      bark : function() {
        console.log("ARF! I have " + this.getLegs() + " legs!");
      }
    }
  });

  var dog = new my.Dog();
  dog.bark();


Only two lines in this example are specific to the server environment: The first one, where you include the %{qooxdoo} package and the implementation of the ``bark`` function, which uses node's ``console`` object. To run the example in Rhino, simply change the first line to something like this:

 ::
 
   load(["path/to/qx-oo-%{version}.js"]);

and replace ``console.log`` with ``print``.

The rest of the code is plain %{qooxdoo}-style %{JS} which can be run in a browser, too. For more information on that topic, take a look at the documentation about :doc:`Object Orientation </pages/core/oo_introduction>`.


.. _pages/server/overview#additional_scenarios:

Additional Scenarios
====================

The *%{qooxdoo} %{Server}* package does not contain any server-dependent code so it can also be used in a browser e.g. to have the features described above without the need to use the rest of %{qooxdoo}. Another interesting scenario might be to use the package in a `web worker <https://developer.mozilla.org/en/Using_web_workers>`_, which is also a DOM-less environment.