Liferay
Certification Program
Liferay is very
popular open source portal. Liferay also offers Certification in
liferay.
Liferay offers different Certification programs such as Portal Administration Certification ,Portal Developer Certification and Portal System
Administration Certification.
Following article is
for Portal Developer Certification and its topics and reference links.
Note:
The Topics and its
descriptions are inherited from Liferay website.
Liferay
6.2 Certification
Liferay
6.1 Certification
Certification
FAQs
Register
for Certification
Liferay
Development Best Practices
Liferay
Portal is a powerful platform for designing and developing robust web
applications. While Liferay provides many exciting enterprise caliber
features out of the box, there will be times when it's necessary to
develop applications to extend or modify Liferay. By following
Liferay's best practices, developers can ensure this development will
enhance the current version of Liferay and will allow for a smooth
upgrade when upgrading the core portal. Liferay developers should be
familiar with these best practices.
Development
Environment Setup:
Understanding
Liferay Plugins
Liferay
Architecture and APIs
Understanding
Liferay Architecture:
Liferay
APIs
Service
Builder:
Liferay
Utilities:
Liferay
provides a host of utilities that make developing for the Liferay
Platform easy and efficient. Liferay developers should know how to
leverage the more common utilities (ParamUtil, GetterUtil, HTMLUtil,
etc.) to enhance their productivity.
User
Management and Group APIs:
One
of the most commonly used APIs for developing solutions with Liferay
is the User and Group Management API. Liferay developers should be
familiar with the methods provided by this API and how they can
leverage it when developing custom solutions
AlloyUI:
AlloyUI
is a framework built on top of YUI3 that provides a simple API for
building highly scalable applications. Liferay developers should be
familiar with how AlloyUI can be leveraged in custom development and
to extend Liferay's capabilities.
Expando
API:
Liferay's
Expando Service provides an elegant way to extend the Liferay schema
without the pain associated with modifying the underlying database.
Liferay developers should be familiar with the capabilities of the
Expando Service and understand how to write code that creates and
utilizes Expandos.
Application
Display Templates
Application
Display Templates enable customization to the default views of many
Liferay applications. Liferay Developers should be familiar with how
to enable Application Display Templates in their own portlets.
Liferay
Portlet Plugin Development
Portlet
API
While
Liferay does support portlet development with a wide variety of
languages and frameworks, the most common portlets will be based on
the JSR-286 specification. Liferay developers should be very familiar
with the JSR-286 specification and understand how its features are at
the core of other popular portlet application frameworks.
Configuration
The
standard deployment descriptor (portlet.xml) and Liferay specific
configuration files allow portlets to inform Liferay which features
they will be implementing. Liferay developers should know how to use
these configuration files to leverage standard portlet features as
well as Liferay specific features.
IPC
The
JSR-286 specification adds support for Inter Portlet Communication
(IPC). IPC allows developers to build powerful, multi-portlet
applications that can share and update data seamlessly. Liferay
developers should be familiar with both methods of IPC and understand
how to leverage them to create powerful portlet applications.
Liferay
MVCPortlet
The
Liferay MVCPortlet framework is a simple, lightweight, easy to use
framework that builds on top of GenericPortlet, but removes much of
the boilerplate code that is common when directly extending
GenericPortlet. Liferay developers should understand how the Liferay
MVCPortlet framework works so they can understand the Liferay
provided portlet plugins as well as leverage the features in their
own portlets, if desired.
JSP
and UI Technologies
When
working with portlets that extend Liferay's MVCPortlet or
GenericPortlet the most common view technology will be Java Server
Pages (JSP). Liferay provides a significant number of tag libraries
that can be leveraged in JSPs to improve developer productivity and
efficiency. Liferay developers should be familiar with JSPs and know
how to leverage the Liferay provided tag libraries.
JSP
Tag Libs
Alloy
UI JS libraries and Its Modules
Permissions
Liferay
provides a robust, fine-grained permission system that is available
in core portlets as well as portlet plugins. Liferay developers
should know how to leverage this permission system when developing
their own portlet plugins.
Liferay
Hook Plugin Development
Best
Practices
When
used properly, Hooks are ideal for customizing core Liferay features
and will allow for easier upgrades. However, it is important for
Liferay developers to follow best practices when developing hooks to
ensure maintainable code.
Configuration
Hook
Configuration
Hooks provide a hot-deployable mechanism for customizing portal
properties. Not all portal properties can be modified with a hook,
but when possible, it is recommended to use a hook. Liferay
developers should be aware of how to best leverage Configuration
Hooks and know their limitations.
JSP
Hook
A
JSP Hook can override JSP files or other web resources found in
portal-web in the Liferay source. By properly leveraging this
feature, Liferay developers can easily accomplish many of the most
common user interface customizations in the Liferay Platform. Liferay
developers need to know how to properly apply JSP Hooks to create
robust solutions that will upgrade gracefully and how to avoid the
most common errors made when implementing JSP Hook solutions.
Language
Hook
A
Language Hook can override existing language keys in the portal or
can be used to add new language keys. Liferay developers need to know
how to use Language Hooks to know how to properly override default
and new language keys in both the default language and any other
supported language keys of the portal.
Indexer
Post Processor Hook
An
Indexer Post Processor Hook provides a powerful post-processing
mechanism on top of the existing indexer to allow plugin hook
developers to modify the search summaries, indexes, and queries.
Liferay developers should know how to leverage this exciting feature
to enhance the search capabilities of the portal.
Service
Wrapper Hook
One
of Liferay's many strengths is its powerful Services Oriented
Architecture. Service Wrapper Hooks allow plugin developers to take
something great, and make it even better. Liferay developers should
know how to properly leverage a Service Wrapper Hook to customize and
extend Liferay's core services.
Struts
Action Hook
Struts
Action Hooks can be used to override core portal and portlet struts
actions and to add new struts actions, when necessary. Liferay
developers should be familiar with the recommended approach for
implementing a Struts Action Hook.
https://www.liferay.com/documentation/liferay-portal/6.1/development/-/ai/lp-6-1-dgen06-overriding-and-adding-struts-actions-0
Servlet
Filter Hook
Liferay
provides a set of servlet filters to pre-process requests going to
Liferay and post-process responses coming from Liferay. A Liferay
developer should know how to leverage the Servlet Filter Hook plugin
to customize these existing servlet filters or to implement new
servlet filters.
Portal
Properteis Hook
Events
Hook
Liferay
Theme Plugin Development
Liferay
Themes allow you to completely transform the look and feel of your
portal. Liferay developers must be familiar with the proper approach
to creating a theme to ensure that themes are efficient and don't
incur a performance penalty on each request. Following best practices
will also ensure that themes are easily upgradable.
Understanding
Liferay Theme Development
Liferay
Themes follow a well organized, modular structure. Custom themes are
based on modifications or differences from a base theme. Liferay
developers must know how to properly create or customize a theme to
ensure that the theme follows the proper structure. Failure to follow
Liferay's standards can lead to themes that are not easily
upgradable.
Color
Schemes and Theme Settings
Color
schemes allow you to package a collection of pre-defined theme
variations in a single plugin. Theme settings allow you to provide
options that can be set at run-time to customize the look or
functionality of your theme. Liferay developers should be familiar
with how to leverage both of these features when developing or
customizing a Liferay Theme.
Theme
settings
Embedded
Portlets
mbedding
portlets in a theme provides a powerful mechanism to get the most out
of limited screen real estate, but when not done properly, it can
have a significant negative effect on portal performance. Liferay
developers should know how to properly embed portlets in a Liferay
Theme to improve the usability of the Theme without negatively
impacting the Theme performance.
Liferay
Layout Template Plugin Development
Liferay
Layout Templates provide the framework or skeleton of a page. When
dragging and dropping portlets to a page, the layout template is what
defines the number and size of columns available to you. Liferay
developers should know how to properly define and customize layout
templates.
Understanding
Liferay Layout Template Development
Liferay
Layout Templates can be created with any combination of required rows
and columns and the columns can be sized as needed. Layout templates
can also include embedded portlets to ensure page consistency.
Liferay developers should know how to leverage all of these layout
template features to create customized layout templates as needed.
http://www.liferay.com/documentation/liferay-portal/6.2/development/-/ai/embedding-portlets-in-a-layout-template-liferay-portal-6-2-dev-guide-09-en
Liferay
Advanced Customization
Liferay
provides many options for customizing all aspects of Liferay's
behavior. Many of the more advanced customizations one may encounter
will involve modifying the core behavior of the portal itself.
Liferay developers should be familiar with the customization options.
Understanding
EXT Plugins
The
Ext plugin provides the most powerful method of extending Liferay.
Liferay developers should understand the capabilities of the EXT
plugin and should understand the special scenarios that require the
use of the EXT plugin.
Modifying
Portal Configuration
There
are some types of portal configuration changes that are not possible
when using hooks. Liferay developers should understand when these
changes are required and how they should be best implemented.
http://www.liferay.com/web/nelson.aguayo/blog/-/blogs/recommendations-for-your-portal-ext-properties
Customizing
Core Portlets
Liferay
ships with a robust set of core portlets which provide a wide range
of features that satisfy many different use cases. In some cases,
these core portlets will need to be modified in ways that are not
supported by the Liferay Hook Plugin. Liferay developers should
understand when this type of modification is required and how to best
implement these types of customizations
Tips:
Read
all DTD Definitions So that we can know all Configuration tags
Read
all Tag Libraries Tags and its attributes
Read
all portal properties other related properties
Suggested
Books
Liferay
Cook Book
Liferay In Action
Liferay
Developer Guide
Liferay
Developer Nerwork
Liferay
Blogs
Liferay
Wikis
Author
Posts
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