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Oracle GlassFish Server 3.1 Add-On Component Development Guide
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Document Information

Preface

1.   Introduction to the Development Environment for GlassFish Server Add-On Components

2.  Writing HK2 Components

HK2 Component Model

Services in the HK2 Component Model

HK2 Runtime

Scopes of Services

Instantiation of Components in HK2

HK2 Lifecycle Interfaces

Inversion of Control

Injecting HK2 Components

Extraction

Instantiation Cascading in HK2

Identifying a Class as an Add-On Component

Using the Apache Maven Build System to Develop HK2 Components

3.  Extending the Administration Console

4.  Extending the asadmin Utility

5.  Adding Monitoring Capabilities

6.  Adding Configuration Data for a Component

7.  Adding Container Capabilities

8.  Creating a Session Persistence Module

9.  Packaging, Integrating, and Delivering an Add-On Component

A.  Integration Point Reference

Index

Chapter 2

Writing HK2 Components

The Hundred-Kilobyte Kernel (HK2) is the lightweight and extensible kernel of GlassFish Server. To interact with GlassFish Server, add-on components plug in to this kernel. In the HK2 component model, the functions of an add-on component are declared through a contract-service implementation paradigm. An HK2 contract identifies and describes the building blocks or the extension points of an application. An HK2 service implements an HK2 contract.

The following topics are addressed here: