It’s a free and open source enterprise portal written in java. It is distributed under GNU Lesser General Public License. Liferay includes a built-in web content management system allowing users to build websites and portals as an assembly of themes, pages, portlets /gadgets and a common navigation. Liferay’s support for plugins extends into multiple programming languages, including support for PHP and Ruby portlets. Liferay Portal is Java-based and runs on any platform capable of running the JRE and application server. Liferay is available bundled with a servlet container such as Tomcat.
Important terms in liferay:
Layout Templates are ways of choosing how your portlets will be arranged on a page. They make up the body of your page, the large area where you drag and drop your portlets to create your pages. Liferay Portal comes with several built-in layout templates, but if you have a complex page layout (especially for your home page), you may wish to create a custom layout template of your own.
Themes are hot deployable plugins which can completely transform the look and feel of the portal. Themes make it possible to change the user interface so completely that it would be difficult or impossible to tell that the site is running on Liferay. Liferay provides a well-organized, modular structure to its themes.
A theme can inherit the styling, images, and templates from any of the built in themes, overriding them only where necessary. This allows themes to be smaller and less cluttered with extraneous data that already exists in the default theme (such as graphics for emoticons for the message board’s portlet).
Do you want to transform the look and feel of your Liferay Portal? Create your own Liferay Theme! Themes are hot deployable plugins unique to a site served by the portal. With themes, you can alter the user interface so completely that it’s difficult or impossible to tell that the site is running on Liferay.
Liferay provides a well-organized, modular structure to its themes. Themes follow the same philosophy as Liferay configuration: they are modifications, or differences from the default. Because of this, every line of markup and every style has a default value that your theme can fall back on if you have chosen not to customize it. In other words, your theme inherits the styling, images, and templates from any of the built-in themes. This saves you time and keeps your themes smaller and less cluttered, because your theme contains only its own resources, using defaults for the rest, like emoticon graphics for the message board’s portlet.
Liferay themes are easy to create. You can start by making changes only in the CSS files. When you need to customize themes more extensively, you can change the HTML.
If you hope to become a theme customization guru, there are several technologies you should know:
How to create a simple, sample liferay theme?!
Our theme will be named Deep Blue, so the project name (without spaces) is deep-blue, and the display name (which can have spaces) is Deep Blue. Let’s create the theme using Eclipse IDE.
Setting a base Theme
All themes in Liferay are built on top of two base themes, named _unstyled and _styled. Your newly created theme is based on these by default, but they contain very limited styling. You can take advantage of an existing theme’s styling by setting the theme of your choice as the base for your theme.
To specify a base theme, edit the build.xml file for your theme and change _styled in <property name=“theme.parent” value=“_styled”> to the name of any existing theme that’s installed.
Deploying the Theme
Deploying in Eclipse: Click and drag your theme project onto your server.
Let’s apply your theme to a page:
Go to your web browser and log in to the portal. Hover over Manage at the top of the page and click on Page. Directly underneath the words Manage Pages, select the Look and Feel tab. Click on your theme to activate it.
Now that you’ve studied, built and deployed a simple liferay theme! 😀