跳至主要内容

JSF 2.3: CDI compatible @ManagedProperty

CDI compatible @ManagedProperty

In JSF 2.3, the built-in scope annotations are deprecated, there are some alternatives provided in CDI, eg. ApplicationScoped, SessionScope, RequestScoped, etc.
In JSF 2.2, JSF itself provided a CDI compatible ViewScoped, go here to view more details.
There is an exception, we can not find an alternative for the legacy @ManagedProperty, there is a useful blog entry describe how to created a CDI compatible @ManagedProperty from scratch.
Fortunately, JSF 2.3 provides a built-in CDI implementation.
Let's create a sample to try it.
Create a simple backing bean.
import javax.faces.annotation.ManagedProperty;
//...other imports

@Model
public class BackingBean {

    @Inject
    @ManagedProperty("#{fooBean.bar}")
    private String message;

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
       
}
NOTE, @ManagedProperty is from package javax.faces.annotation, which is newly added in JSF 2.3.
fooBean is a CDI bean, which has a property named bar.
@Named
public class FooBean {

    private String bar = "bar from FooBean";

    public String getBar() {
        return bar;
    }

    public void setBar(String bar) {
        this.bar = bar;
    }
}
In the facelets template, display the message of BackingBean.
<div>
 CDI managed property: #{backingBean.message} 
</div>
Run this application on Glassfish v5, open your browser and navigate to http://localhost:8080/jsf-managedproperty/managedproperty.faces.
jsf cdi managedproperty
Grab the source codes from my github account, and have a try.

评论

此博客中的热门博文

AngularJS CakePHP Sample codes

Introduction This sample is a Blog application which has the same features with the official CakePHP Blog tutorial, the difference is AngularJS was used as frontend solution, and CakePHP was only use for building backend RESR API. Technologies AngularJS   is a popular JS framework in these days, brought by Google. In this example application, AngularJS and Bootstrap are used to implement the frontend pages. CakePHP   is one of the most popular PHP frameworks in the world. CakePHP is used as the backend REST API producer. MySQL   is used as the database in this sample application. A PHP runtime environment is also required, I was using   WAMP   under Windows system. Post links I assume you have some experience of PHP and CakePHP before, and know well about Apache server. Else you could read the official PHP introduction( php.net ) and browse the official CakePHP Blog tutorial to have basic knowledge about CakePHP. In these posts, I tried to follow the steps describ

JPA 2.1: Attribute Converter

JPA 2.1: Attribute Converter If you are using Hibernate, and want a customized type is supported in your Entity class, you could have to write a custom Hibernate Type. JPA 2.1 brings a new feature named attribute converter, which can help you convert your custom class type to JPA supported type. Create an Entity Reuse the   Post   entity class as example. @Entity @Table(name="POSTS") public class Post implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name="ID") private Long id; @Column(name="TITLE") private String title; @Column(name="BODY") private String body; @Temporal(javax.persistence.TemporalType.DATE) @Column(name="CREATED") private Date created; @Column(name="TAGS") private List<String> tags=new ArrayList<>(); } Create an attribute convert

Auditing with Hibernate Envers

Auditing with Hibernate Envers The approaches provided in JPA lifecyle hook and Spring Data auditing only track the creation and last modification info of an Entity, but all the modification history are not tracked. Hibernate Envers fills the blank table. Since Hibernate 3.5, Envers is part of Hibernate core project. Configuration Configure Hibernate Envers in your project is very simple, just need to add   hibernate-envers   as project dependency. <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-envers</artifactId> </dependency> Done. No need extra Event listeners configuration as the early version. Basic Usage Hibernate Envers provides a simple   @Audited   annotation, you can place it on an Entity class or property of an Entity. @Audited private String description; If   @Audited   annotation is placed on a property, this property can be tracked. @Entity @Audited public class Signup implements Serializa