Résumé
Significantly different from the earlier version, the 2.0 specification introduces three dramatic improvements: A completely new version of container-managed persistence; local interfaces; and a totally new kind of bean called the "message driven bean."
The new version of container-managed persistence (CMP) beans in 2.0 is more portable and robust than in the older 1.1 version. Most significant is the introduction of the relationship fields, which allow entity beans to declare relationships with each other as natural references. In order to make this huge leap in component relationships possible, EJB 2.0 had to redesign how entity beans are defined and interact. Our new 3rd edition examines this critical CMP model in detail.
Local interfaces are thoroughly discussed as well. Local interfaces allow beans that are co-located to interact without the overhead of remote method calls. This improves the performance of beans considerably and complements the CMP relationship fields.
Message driven beans are a new kind of enterprise bean based on asynchronous messaging and the Java Message service (JMS). Instead of responding to Java RMI calls, message driven beans process JMS messages sent by messaging clients. An entire chapter is devoted to message-driven beans and how to use them effectively.
In addition, the 3rd edition contains an architecture overview, information on resource management and primary services, design strategies, and XML deployment descriptors.
Table of Contents
- Preface
- 1: Introduction
- Setting the Stage
- Enterprise JavaBeans Defined
- Distributed Object Architectures
- Component Models
- Component Transaction Monitors
- CTMs and Server-Side Component Models
- Titan Cruises: An Imaginary Business
- What's Next?
- 2: Architectural Overview
- The Enterprise Bean Component
- Using Enterprise Beans
- The Bean-Container Contract
- Summary
- 3: Resource Management and the Primary Services
- Resource Management
- Primary Services
- What's Next?
- 4: Developing Your First Enterprise Beans
- Choosing and Setting Up an EJB Server
- Developing an Entity Bean
- Developing a Session Bean
- 5: The Client View
- Locating Beans with JNDI
- The Remote Client API
- EJB 2.0: The Local Client API
- 6: EJB 2.0 CMP: Basic Persistence
- Overview
- The Customer EJB
- Persistence Fields
- Dependent Value Classes
- Relationship Fields
- 7: EJB 2.0 CMP: Entity Relationships
- The Seven Relationship Types
- 8: EJB 2.0 CMP: EJB QL
- Declaring EJB QL
- The Query Methods
- EJB QL Examples
- Problems with EJB QL
- 9: EJB 1.1 CMP
- A Note for EJB 2.0 Readers
- Overview for EJB 1.1 Readers
- Container-Managed Persistence
- 10: Bean-Managed Persistence
- The Remote Interface
- The Remote Home Interface
- The Primary Key
- The ShipBean
- Obtaining a Resource Connection
- Exception Handling
- The ejbCreate( ) Method
- The ejbLoad( ) and ejbStore( ) Methods
- The ejbRemove( ) Method
- The ejbFind( ) Methods
- The Deployment Descriptor
- 11: The Entity-Container Contract
- The Primary Key
- The Callback Methods
- EJB 2.0: ejbHome( )
- EntityContext
- The Life Cycle of an Entity Bean
- 12: Session Beans
- The Stateless Session Bean
- The Life Cycle of a Stateless Session Bean
- The Stateful Session Bean
- The Life Cycle of a Stateful Session Bean
- 13: Message-Driven Beans
- JMS as a Resource
- Message-Driven Beans
- 14: Transactions
- ACID Transactions
- Declarative Transaction Management
- Isolation and Database Locking
- Nontransactional Beans
- Explicit Transaction Management
- Exceptions and Transactions
- Transactional Stateful Session Beans
- 15: Design Strategies
- Hash Codes in Compound Primary Keys
- Passing Objects by Value
- Improved Performance with Session Beans
- Bean Adapters
- Implementing a Common Interface
- Entity Beans Without Create Methods
- EJB 1.1: Object-to-Relational Mapping Tools
- Avoid Emulating Entity Beans with Session Beans
- Direct Database Access from Session Beans
- Avoid Chaining Stateful Session Beans
- 16: XML Deployment Descriptors
- What Is an XML Deployment Descriptor?
- The Contents of a Deployment Descriptor
- The Document Header
- The Descriptor's Body
- Describing Enterprise Beans
- EJB 2.0: Describing Relationships
- Describing Bean Assembly
- The ejb-jar File
- 17: Java 2, Enterprise Edition
- Servlets
- JavaServer Pages
- Web Components and EJB
- J2EE Fills in the Gaps
- Fitting the Pieces Together
- Future Enhancements
- A: The Enterprise JavaBeans API
- B: State and Sequence Diagrams
- C: EJB Vendors
- Index
L'auteur - Richard Monson-Haefel
Richard Monson-Haefel fait partie des meilleurs
specialistes Enterprise JavaBeans. Il est notamment
l'architecte du projet OpenEJB, un serveur de beans Open Source, et travaille comme consultant en
informatique distribuee d'entreprise.
Caractéristiques techniques
| PAPIER | |
| Éditeur(s) | O'Reilly |
| Auteur(s) | Richard Monson-Haefel |
| Parution | 22/10/2001 |
| Édition | 3eme édition |
| Nb. de pages | 568 |
| Format | 17,8 x 23,4 |
| Couverture | Broché |
| Poids | 846g |
| Intérieur | Noir et Blanc |
| EAN13 | 9780596002268 |
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