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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...
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...
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...
Using Custom SQL Queries
Using Custom SQL Queries Service Builder creates finder methods that retrieve entities by their attributes (their column values). When you add a column as a parameter for the finder in your...
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...
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...
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...
Using Dynamic Query
Using Dynamic Query Liferay's Dynamic Query API wraps Hibernate's Criteria API. It helps you think in terms of objects and member variables instead of tables and columns. Complex queries can be...
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,...
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...
Using Domain-Specific Language Queries
Using Domain-Specific Language Queries Liferay 7.4+ DSL Query is an acronym for Domain-Specific Language Query. The foundation is based upon using a domain-specific language for the...
Advanced Queries
Official Documentation
Advanced Queries Service Builder doesn't limit you to elements in service.xml. If simple finders aren't sufficient for getting data out of your application, there are three other ways to make the...
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....
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,...
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...
Upgrading Data Schemas
Official Documentation
Upgrading Data Schemas When you upgrade Liferay, you might run into incompatibility issues with your custom modules' data schemas. There are three ways you can resolve these issues: You can run...
CDI Portlet Predefined Beans
Official Documentation
CDI Portlet Predefined Beans Liferay DXP provides injectable portlet artifacts for CDI called Portlet Predefined Beans, as specified by JSR 362. There are two types of predefined beans: Portlet...
Reference
Official Documentation
Reference
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...
Portlet Level Configuration
Official Documentation
Portlet Level Configuration With the configuration framework, you can set your application's configuration for different levels of scope. Where Instance and Site-scoped configurations use...
Categorizing a Configuration
Official Documentation
Categorizing a Configuration When you register a configuration interface, the UI for your application is generated in System Settings → Platform → Third Party. If you prefer a different section and...
Configuration Model Listener Reference
Official Documentation
Configuration Model Listener Reference Use model listeners in your own configurations to listen for events and execute code in response. Creating a model listener requires only three steps: ...
Message Bus
Official Documentation
Message Bus The Message Bus provides a loosely coupled way to exchange messages. A class sending a message invokes the Message Bus to send the message to a destination, while other classes...
Using Default Synchronous Messaging in Previous Versions
Official Documentation
Using Default Synchronous Messaging in Previous Versions Liferay DXP 7.4 U48/Portal GA49 and Below In default synchronous messaging, the sender blocks while a Message Bus thread dispatches the...
Configuration Form Renderer
Official Documentation
Configuration Form Renderer When you create a configuration interface, a configuration UI is automatically generated. But in some cases you want customize the look and feel of the UI. For example,...
Field Options Provider
Official Documentation
Field Options Provider You can populate a drop-down list manually in the @Meta.AD annotation of the configuration interface. But you can also populate the option labels and values automatically...
DDM Form Annotations
Official Documentation
DDM Form Annotations The auto-generated configuration interface UI may be too simplistic for some configurations. You can use the Dynamic Data Mapping (DDM) form annotations to customize your...
Using Asynchronous Messaging
Official Documentation
Using Asynchronous Messaging Message Bus's asynchronous option provides fire and forget behavior; send a message and continue processing without waiting for a response. An asynchronous message is...
Completely Custom Configuration
Official Documentation
Completely Custom Configuration A configuration UI is generated automatically when you create a configuration interface. But in some cases you want a completely custom UI for your configuration....
Configuration Framework
Official Documentation
Configuration Framework Setting and Accessing Configurations Categorizing a Configuration Scoping Configurations Portlet Level Configuration Configuration Form Renderer DDM Form Annotations ...
Manually Programming Scheduled Jobs
Official Documentation
Manually Programming Scheduled Jobs Implementing the SchedulerJobConfiguration interface provides greater flexibility and improved performance as it is closer to the core of the job scheduler...
Listening for Registration Events
Official Documentation
Listening for Registration Events Liferay DXP 2023.Q3/Portal GA92 and Below The messaging API supports listening for destination and message listener registration events. Here are some reasons to...
Setting and Accessing Configurations
Official Documentation
Setting and Accessing Configurations You can use Liferay's configuration framework to add a settings UI for a MVC Portlet. See the Example Portlet Then, follow these steps: Download and unzip...
Creating Job Scheduler Templates
Official Documentation
Creating Job Scheduler Templates Liferay Self-Hosted Liferay PaaS Job Scheduler Tasks are created by implementing the DispatchTaskExecutor interface. Liferay DXP provides multiple out-of-the-box...
Listening for Messages
Official Documentation
Listening for Messages You can listen for messages sent to any registered Message Bus destination, whether it's built-in to DXP/Portal, defined by third-parties, or created by you. Messages sent to...
Hiding the Configuration UI
Official Documentation
Hiding the Configuration UI Liferay generates a configuration UI automatically after a configuration interface deploys. But you may have certain use cases where you want to hide the UI. For...
Scoping Configurations
Official Documentation
Scoping Configurations In Liferay DXP, you can set an application's configuration to different levels of scope: System, Instance, Site, or Portlet. For example, if you create an application to have...
Job Scheduler UI Reference
Official Documentation
Job Scheduler UI Reference Liferay Self-Hosted Liferay PaaS Job Scheduler Triggers View, create, and manage Job Scheduler Tasks. The Job Scheduler Triggers tab lists all tasks added to the...
Tuning Messaging Performance
Official Documentation
Tuning Messaging Performance Liferay DXP 2023.Q3/Portal GA92 and Below Messaging performance is tuned at the destinations. Performance depends on the destination type, the amount of processing the...
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...
Liferay Faces Version Scheme
Official Documentation
Liferay Faces Version Scheme In this article, you'll learn which Liferay Faces artifacts should be used with your portlet and explore the Liferay Faces versioning scheme by discovering what each...
Portlet Preferences
Official Documentation
Portlet Preferences You can give administrators and users a way to customize a portlet with portlet preferences. Portlet preferences can be added to any MVC Portlet to give users a UI to access and...
Invoking Actions with MVC Portlet
Official Documentation
Invoking Actions with MVC Portlet A portlet's Action phase applies state changes. You can bind your portlet's action-handling methods to UI components using portlet action URLs. They are...
MVC Resource Command
Official Documentation
MVC Resource Command MVC Resource Command classes retrieve resources: images, XML, or any other kind of resource from a DXP/Portal instance without triggering any actions or renders. Requests or...
Rendering Views with MVC Portlet
Official Documentation
Rendering Views with MVC Portlet If you want users to access your portlet's views, you must implement navigation to them. Portlet render URLs help you do this. Here you'll deploy an example...
Chart Tag Library
Official Documentation
Chart Tag Library Lines, splines, bars, pies and more, the Chart tag Library provides everything you need to model data. Each taglib gives you access to the corresponding Clay component. These...
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...
MVC Render Command
Official Documentation
MVC Render Command MVC Render Commands are classes that handle which page to render. They are invoked by MVCPortlet render URLs and requests. If your render logic is simple you can implement all of...
Tag Libraries
Official Documentation
Tag Libraries You have access to a powerful set of taglibs for creating commonly used UI components in your apps, themes, and web content. The following taglibs are covered in this section: AUI:...
Alloy UI (AUI) Tag Library
Official Documentation
Alloy UI (AUI) Tag Library The AUI tag library provides tags that implement commonly used UI components. These tags make your markup consistent, responsive, and accessible. You can find a list of...
Building Forms with AUI Tags
Official Documentation
Building Forms with AUI Tags The AUI tag library provides all the components you need to build forms for your applications. AUI tags provide many benefits to standard form elements, such as custom...
Using Upgrade Processes in Earlier Versions
Official Documentation
Using Upgrade Processes in Earlier Versions Liferay DXP 7.4 U10/Portal 7.4 GA14 and Below Follow these steps to create an upgrade process for your module: Open your module's bnd.bnd file, and...
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...
Multithreading Process
Official Documentation
Multithreading Process Liferay DXP 7.4 U10+ or Liferay Portal 7.4 GA14+ Your Upgrade Processes may involve making complex changes to large data sets. If performance is critical, use the...
Using JSF
Official Documentation
Using JSF Liferay Faces is an umbrella project that provides support for the JavaServer[™] Faces (JSF) standard in Liferay DXP/Portal. Here are the Liferay Faces topics: Introduction to Liferay...
Liferay Faces Bridge
Official Documentation
Liferay Faces Bridge Liferay Faces Bridge enables you to deploy JSF web apps as portlets without writing portlet-specific code. It also contains innovative features that make it possible to...
Using Upgrade Processes
Official Documentation
Using Upgrade Processes Liferay DXP 7.4 U10+/Portal 7.4 GA14+ An upgrade of your application may require making changes to your database tables. Liferay's upgrade framework makes it easy to make...