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Sharing Localized Messages
Official Documentation
Sharing Localized Messages As you work on an application you might have multiple modules, each of which with its own language keys. Instead of maintaining various language properties files in...
Aggregating Resource Bundles
Official Documentation
Aggregating Resource Bundles When working with a module that shares localized messages, the bnd header must specify the resource bundles you want to associate with the module. Liferay provides a...
Using a JSP and MVC Portlet
Official Documentation
Using a JSP and MVC Portlet An easy way to start developing a web application is to add markup to a JSP file and render it using a portlet Java class. The W3E7 example application demonstrates...
Using Liferay Util Param
Official Documentation
Using Liferay Util Param The param tag lets you set a parameter for an included JSP page. This configuration requires two JSPs. JSP A, the main view of the app, includes JSP B and sets its...
Using Liferay Util Whitespace Remover
Official Documentation
Using Liferay Util Whitespace Remover The whitespace remover tag removes line breaks and tabs from code blocks included between the opening and closing of the tag. Below is an example configuration...
Using Localized Messages in an MVC Portlet
Official Documentation
Using Localized Messages in an MVC Portlet Liferay's localization framework is for creating localized messages in your MVC portlet. Deploy the Sample Code Then, follow these steps: Download...
Remote Applications with Headless APIs
Official Documentation
Remote Applications with Headless APIs Available 7.4+ After creating and publishing objects, headless REST APIs are automatically generated. Here you'll see how to integrate these endpoints to...
React Component Utilities Reference
Official Documentation
React Component Utilities Reference Several useful tools are available to help you build high-performance components and applications in Liferay DXP using React: frontend-js-react-web module ...
Using React
Official Documentation
Using React Build your own solutions using Liferay and React.
Using Spring
Official Documentation
Using Spring If you love the Spring Framework and the Model-View-Controller (MVC) pattern, you can develop portlets using PortletMVC4Spring. If you use this framework, you may already be familiar...
Reference
Official Documentation
Reference PortletMVC4Spring integrates Spring, the Spring Web Framework, and the MVC design pattern with portlet development. As such, it uses configuration files from each of these areas and...
Developing a PortletMVC4Spring Portlet
Official Documentation
Developing a PortletMVC4Spring Portlet PortletMVC4Spring compliments the Spring Web framework and MVC design pattern by providing annotations that map portlet requests to Controller classes and...
Customizing JSPs with Dynamic Includes
Customizing JSPs with Dynamic Includes The liferay-util:dynamic-include tag is a placeholder into which you can inject content---JavaScript code, HTML, and more. The example project demonstrates...
Migrating to PortletMVC4Spring and Jakarta
Official Documentation
Migrating to PortletMVC4Spring and Jakarta There are two possible migrations: You've already used PortletMVC4Spring, and you want to migrate your application to Jakarta. You want to migrate a...
PortletMVC4Spring Annotations
Official Documentation
PortletMVC4Spring Annotations PortletMVC4Spring provides several annotations for mapping requests to controller classes and controller methods. @RenderMapping Annotation Examples...
PortletMVC4Spring Project Anatomy
Official Documentation
PortletMVC4Spring Project Anatomy PortletMVC4Spring portlets are packaged in WARs. Liferay provides project templates for creating projects configured to use JSP/JSPX and Thymeleaf templates. Their...
Creating a Model Listener
Creating a Model Listener Model listeners listen for persistence method calls that signal changes to a specified model (such as update or add methods). Most of the methods model listeners use are...
PortletMVC4Spring Configuration Files
Official Documentation
PortletMVC4Spring Configuration Files A PortletMVC4Spring application has these descriptors, Spring contexts, and properties files in its WEB-INF folder: web.xml → Web application descriptor ...
Extending Liferay
Official Documentation
Extending Liferay Liferay DXP/Portal is highly customizable. Its modular architecture contains components you can extend and override dynamically using APIs.
Creating Service Wrappers
Creating Service Wrappers With Service Wrappers, you can override default service methods to add extra functionality. For example, you may want the value of a field you've added to Liferay's User...
Adding a Language
Official Documentation
Adding a Language Liferay ships with over 50 languages out-of-the-box. Translation is complete for many of these languages, and some are still in the translation process. Each language has its own...
Customizing Localization
Official Documentation
Customizing Localization Liferay ships with 55 translations, making it ideal for deployments all over the world. Sometimes, however, you must modify a translation or provide a new one. Here you can...
Configuring service.properties
Official Documentation
Configuring service.properties Service Builder generates a service.properties file in your *-service module's src/main/resources folder. Liferay uses this file's properties to alter your service's...
Defining Entity Columns
Official Documentation
Defining Entity Columns An entity's columns represent its attributes. These attributes map table fields to Java object fields. Here you'll examine the sample project from Understanding and...
Modifying Database Fields in Development
Official Documentation
Modifying Database Fields in Development As you develop an application, you might need to add fields to your database. This is a normal process of iterative development: you get an idea for a new...
Connecting Service Builder to an External Database
Official Documentation
Connecting Service Builder to an External Database Service builder creates the necessary tables for the service in the lportal database with all other data used by Liferay. If you want to store the...
Defining Entity Finder Methods
Official Documentation
Defining Entity Finder Methods Finder methods retrieve entity objects from the database based on specified parameters. For each finder defined, Service Builder generates several methods to fetch,...
Adding Model Hints
Official Documentation
Adding Model Hints Once you've used Service Builder to define model entities, you may want to refine how users enter that data. Model hints specify entity data restrictions and other formatting....
Sorting Entity Instances
Official Documentation
Sorting Entity Instances Often, you want to retrieve multiple instances of a given entity and list them in a particular order. The service.xml file lets you specify the default order of your...
Configuring Global Service Options
Official Documentation
Configuring Global Service Options A service's global options apply to all its entities. Here are the options: Dependency Injector Package path Multiversion concurrency control Namespace...
Defining Entity Relationships
Official Documentation
Defining Entity Relationships Relationships between database entities or Java objects are necessary for most applications. Take Liferay's Message Boards application as an example. Each Message...
Service Builder Basics
Official Documentation
Service Builder Basics Using Service Builder helps you learn it. You'll use it to learn the basics: Generating Model, Persistence, and Service Code: Define a basic model, generate code from it,...
Liferay Faces Portal
Official Documentation
Liferay Faces Portal Liferay Faces Portal is distributed in a .jar file. You can add Liferay Faces Portal as a dependency for your portlet projects to use its Liferay-specific utilities and UI...
Liferay Faces Bridge
Official Documentation
Liferay Faces Bridge You can use Liferay Faces Bridge to deploy JSF web apps as portlets without writing portlet-specific code. It also includes features that support JSF 2.x inside a portlet...
Using MVC
Official Documentation
Using MVC If you're an experienced developer, this is not the first time you've heard about Model View Controller. If there are so many implementations of MVC frameworks in Java, why did Liferay...
Generating Model, Persistence, and Service Code
Official Documentation
Generating Model, Persistence, and Service Code Service Builder makes it easy to define models and generate model, persistence, and service code for them. You'll experience this by defining a model...
Developing a Web Application
Official Documentation
Developing a Web Application
Using Bean Portlet
Official Documentation
Using Bean Portlet Portlet 3.0, the JSR 362 standard, features a style of portlet development called Bean Portlets that use Contexts and Dependency Injection (CDI). Bean Portlets fully leverage all...
Reference
Official Documentation
Reference
Understanding and Extending Generated Classes
Official Documentation
Understanding and Extending Generated Classes Service Builder generates both tables for your entity and model, persistence, and service classes for it. Here you'll examine generated classes for an...
Invoking a Service Locally
Official Documentation
Invoking a Service Locally Service Builder services that are deployed to DXP/Portal can be invoked from other classes in the same JVM. These services are local to the classes. Service Builder...
MVC Action Command
Official Documentation
MVC Action Command MVC Action Commands handle actions as separate classes. With Action Commands, you can organize action logic in MVCPortlets that have many actions. Action URLs in the portlet's...
Clay Alerts
Official Documentation
Clay Alerts Clay alerts come in two types: embedded and stripe. Both types, along with several examples of each, are shown below. Embedded Alerts Embedded alerts are usually used inside forms. The...
Clay Badges
Official Documentation
Clay Badges Badges help highlight important information such as notifications or new and unread messages. Badges have circular borders and are only used to specify a number. This covers the...
Clay Cards
Official Documentation
Clay Cards Cards visually represent data. Use them for images, document libraries, user profiles and more. There are four main types of Cards: Image Cards File Cards User Cards Horizontal...
Clay Buttons
Official Documentation
Clay Buttons Buttons come in several types and variations. This tutorial covers the different styles and variations of buttons you can create with the Clay taglibs. Types Primary button: Used for...
Clay Labels and Links
Official Documentation
Clay Labels and Links Liferay Clay taglibs provide tags for creating labels and links in your app. Both of these elements are covered below. Labels The Liferay Clay taglibs provide a few different...
Clay Dropdown Menus and Action Menus
Official Documentation
Clay Dropdown Menus and Action Menus You can add dropdown menus to your app via the clay:dropdown-menu and clay:actions-menu taglibs. The Clay taglibs provide several menu variations for you to...
Clay Form Elements
Official Documentation
Clay Form Elements The Liferay Clay tag library provides several tags for creating form elements. An example of each tag is shown below. Checkbox Checkboxes give the user a true or false input. "...
Clay Icons
Official Documentation
Clay Icons The Liferay Clay taglibs provide several icons that you can use in your apps. Use the clay:icon tag and specify the icon with the symbol attribute: You can include icons in your app...
Overriding Module Language Translations
Overriding Module Language Translations For Liferay DXP 7.4 U4/Portal 7.4 GA8+, the Language Override tool is the recommended approach. Overriding language translations in specific applications...
Using Portlet Filters
Using Portlet Filters Portlet filters intercept requests and responses at the start of each portlet request processing phase so you can add functionality there. This makes them useful for auditing...
Waiting for Life Cycle Events
Waiting for Life Cycle Events Liferay registers life cycle events like portal and portlet initialization into the OSGi service registry. Your OSGi classes can listen for these service registrations...
APIs as OSGi Services
Official Documentation
APIs as OSGi Services After you've learned what a module is and how to deploy one, you can use modules to define APIs and implement them. Liferay APIs are OSGi services, defined by Java interfaces...
Architecture
Official Documentation
Architecture The Liferay DXP/Portal architecture has three parts: Core: Bootstraps DXP and its frameworks. The Core provides a runtime environment for managing services, UI components, and...
Overriding OSGi Services
Overriding OSGi Services Liferay's OSGi container is a dynamic environment in which services can be added, removed, or overridden as needed. This framework registers Liferay components with the...
Generating Translations Automatically
Official Documentation
Generating Translations Automatically Liferay DXP supports 50 languages out-of-the-box. Each locale has its own language properties file containing keys for its language. When you create an...
Fundamentals
Official Documentation
Fundamentals Liferay development projects consist primarily of simple .jar files. These contain a few extra configuration files that make them OSGi modules, but they're easily understandable by...
Overriding Global Language Translations with Language Properties
Overriding Global Language Translations with Language Properties Liferay DXP/Portal implements headings, labels, and messages for many locales using language translations. You can override these...
Overriding JSPs
Overriding JSPs You can override JSPs completely using OSGi fragments. This approach is powerful but can make things unstable when the host module is upgraded. By overriding an entire JSP, you...

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