Document Information


Part I Introduction

1.  Overview

2.  Using the Tutorial Examples

Part II The Web Tier

3.  Getting Started with Web Applications

4.  JavaServer Faces Technology

5.  Introduction to Facelets

6.  Expression Language

7.  Using JavaServer Faces Technology in Web Pages

8.  Using Converters, Listeners, and Validators

9.  Developing with JavaServer Faces Technology

10.  JavaServer Faces Technology: Advanced Concepts

11.  Using Ajax with JavaServer Faces Technology

12.  Composite Components: Advanced Topics and Example

13.  Creating Custom UI Components and Other Custom Objects

14.  Configuring JavaServer Faces Applications

15.  Java Servlet Technology

16.  Uploading Files with Java Servlet Technology

17.  Internationalizing and Localizing Web Applications

Part III Web Services

18.  Introduction to Web Services

19.  Building Web Services with JAX-WS

20.  Building RESTful Web Services with JAX-RS

21.  JAX-RS: Advanced Topics and Example

Part IV Enterprise Beans

22.  Enterprise Beans

23.  Getting Started with Enterprise Beans

24.  Running the Enterprise Bean Examples

25.  A Message-Driven Bean Example

26.  Using the Embedded Enterprise Bean Container

27.  Using Asynchronous Method Invocation in Session Beans

Part V Contexts and Dependency Injection for the Java EE Platform

28.  Introduction to Contexts and Dependency Injection for the Java EE Platform

Overview of CDI

About Beans

About CDI Managed Beans

Beans as Injectable Objects

Using Qualifiers

Injecting Beans

Using Scopes

Overriding the Scope of a Bean at the Point of Injection

Giving Beans EL Names

Adding Setter and Getter Methods

Using a Managed Bean in a Facelets Page

Injecting Objects by Using Producer Methods

Configuring a CDI Application

Further Information about CDI

29.  Running the Basic Contexts and Dependency Injection Examples

30.  Contexts and Dependency Injection for the Java EE Platform: Advanced Topics

31.  Running the Advanced Contexts and Dependency Injection Examples

Part VI Persistence

32.  Introduction to the Java Persistence API

33.  Running the Persistence Examples

34.  The Java Persistence Query Language

35.  Using the Criteria API to Create Queries

36.  Creating and Using String-Based Criteria Queries

37.  Controlling Concurrent Access to Entity Data with Locking

38.  Using a Second-Level Cache with Java Persistence API Applications

Part VII Security

39.  Introduction to Security in the Java EE Platform

40.  Getting Started Securing Web Applications

41.  Getting Started Securing Enterprise Applications

42.  Java EE Security: Advanced Topics

Part VIII Java EE Supporting Technologies

43.  Introduction to Java EE Supporting Technologies

44.  Transactions

45.  Resources and Resource Adapters

46.  The Resource Adapter Example

47.  Java Message Service Concepts

48.  Java Message Service Examples

49.  Bean Validation: Advanced Topics

50.  Using Java EE Interceptors

Part IX Case Studies

51.  Duke's Bookstore Case Study Example

52.  Duke's Tutoring Case Study Example

53.  Duke's Forest Case Study Example



Using the @PostConstruct and @PreDestroy Annotations With CDI Managed Bean Classes

CDI managed bean classes and their superclasses support the annotations for initializing and for preparing for the destruction of a bean. These annotation are defined in JSR 250: Common Annotations for the Java platform.

To Initialize a Managed Bean Using the @PostConstruct Annotation

Initializing a managed bean specifies the lifecycle callback method that the CDI framework should call after dependency injection but before the class is put into service.

  1. In the managed bean class or any of its superclasses, define a method that performs the initialization that you require.
  2. Annotate the declaration of the method with the javax.annotation.PostConstruct annotation.

    When the managed bean is injected into a component, CDI calls the method after all injection has occurred and after all initializers have been called.

    Note - As mandated in JSR 250, if the annotated method is declared in a superclass, the method is called unless a subclass of the declaring class overrides the method.

    The UserNumberBean managed bean in The guessnumber CDI Example uses @PostConstruct to annotate a method that resets all bean fields:

    public void reset () {
        this.minimum = 0;
        this.userNumber = 0;
        this.remainingGuesses = 0;
        this.maximum = maxNumber;
        this.number = randomInt.get(); 

To Prepare for the Destruction of a Managed Bean Using the @PreDestroy Annotation

Preparing for the destruction of a managed bean specifies the lifecycle call back method that signals that an application component is about to be destroyed by the container.

  1. In the managed bean class or any of its superclasses, prepare for the destruction of the managed bean.

    In this method, perform any cleanup that is required before the bean is destroyed, such as releasing a resource that the bean has been holding.

  2. Annotate the declaration of the method with the javax.annotation.PreDestroy annotation.

    CDI calls this method before starting to destroy the bean.