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

Annotations for Field and Bean Properties of Resource Classes

Extracting Path Parameters

Extracting Query Parameters

Extracting Form Data

Extracting the Java Type of a Request or Response

Integrating JAX-RS with EJB Technology and CDI

Conditional HTTP Requests

Runtime Content Negotiation

Using JAX-RS With JAXB

Using Java Objects to Model Your Data

Starting from an Existing XML Schema Definition

Using JSON with JAX-RS and JAXB

The customer Example Application

Overview of the customer Example Application

The Customer and Address Entity Classes

The CustomerService Class

The CustomerClientXML and CustomerClientJSON Classes

Modifying the Example to Generate Entity Classes from an Existing Schema

To Modify the customer Example to Generate Java Entity Classes from an Existing XML Schema Definition

Running the customer Example

To Build, Package, and Deploy the customer Example Using NetBeans IDE

To Build, Package, and Deploy the customer Example Using Ant

To Run the customer Example Using the Jersey Client

To Run the customer Example Using the Web Services Tester

Using Curl to Run the customer Example Application

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

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



Subresources and Runtime Resource Resolution

You can use a resource class to process only a part of the URI request. A root resource can then implement subresources that can process the remainder of the URI path.

A resource class method that is annotated with @Path is either a subresource method or a subresource locator:

  • A subresource method is used to handle requests on a subresource of the corresponding resource.

  • A subresource locator is used to locate subresources of the corresponding resource.

Subresource Methods

A subresource method handles an HTTP request directly. The method must be annotated with a request method designator such as @GET or @POST, in addition to @Path. The method is invoked for request URIs that match a URI template created by concatenating the URI template of the resource class with the URI template of the method.

The following code snippet shows how a subresource method can be used to extract the last name of an employee when the employee’s email address is provided:

Public class EmployeeInfo {

    public employeeinfo() {}

    public String getEmployeeLastName(@PathParam("lastname") String lastName) {


The getEmployeeLastName method returns doe for the following GET request:

GET /employeeinfo/employees/

Subresource Locators

A subresource locator returns an object that will handle an HTTP request. The method must not be annotated with a request method designator. You must declare a subresource locator within a subresource class, and only subresource locators are used for runtime resource resolution.

The following code snippet shows a subresource locator:

// Root resource class
public class EmployeeInfo {

    // Subresource locator: obtains the subresource Employee
    // from the path /employeeinfo/employees/{empid}
    public Employee getEmployee(@PathParam("empid") String id) {
        // Find the Employee based on the id path parameter
        Employee emp = ...;
        return emp;

// Subresource class
public class Employee {

    // Subresource method: returns the employee's last name
    public String getEmployeeLastName() {
        return lastName

In this code snippet, the getEmployee method is the subresource locator that provides the Employee object, which services requests for lastname.

If your HTTP request is GET /employeeinfo/employees/as209/, the getEmployee method returns an Employee object whose id is as209. At runtime, JAX-RS sends a GET /employeeinfo/employees/as209/lastname request to the getEmployeeLastName method . The getEmployeeLastName method retrieves and returns the last name of the employee whose id is as209.