Enterprise JavaBeans

Introduction

There is a sense in which objects have come to the rescue of distributed computing. Client-side presentation and server-side data were obvious and reasonably easy; but distributing the functionality, the "business" logic, was troublesome; that is, it was troublesome whilst we were trying to do it via remote procedure calls. Distributing objects turns out to be a whole lot easier and more intuitive than distributing functions.

Clearly, given Java's success on servers, having portable, standard, open Java offerings for distributable objects would be important. Enterprise JavaBeans give us not only that, but also transactional, persistent and secure distributable objects.

The course uses the open-source JBoss container. Other containers are by special arrangement only.

Duration and Construction

The course lasts three days. It is based on a cycle of theory-language-practice-review, with approximately two cycles per day. One non-trivial, practical case-study is developed during the course.

Each day will start at 09.00 and finish at 16.30.

Intended Audience

Participants will be practising software engineers who already know and use Java. They will probably have attended the Advanced Java course. Participants should also be familiar with the basic idea of networks, of database technology and of transaction processing.

Aims

To understand the J2EE architecture
To understand the EJB architecture
To understand the rôle of Enterprise JavaBeans (EJB)
To practise creating and deploying Enterprise JavaBeans
To understand and use entity beans
To understand and use container-managed persistence and relationships, and bean-managed persistence
To understand and use session beans
To understand and use message-driven beans
To understand EJB 2.1's support for web services

Numbers

We recommend that there are no more than 10 participants, each working at his or her own machine.

Deliverables

Lectures
Facilitation of discussions
Direction, assistance and feedback on exercises
Proposed solutions to the exercises
Copies of lecture slides, plus explanatory text and summaries
Reference list of books and sources

Objects, distributed systems, transactions and persistence recap
XML review
Servers, containers and deployment
The EJB architecture and the bean interfaces
EJB clients and JNDI
Entity beans
Container-managed persistence and relationships
EJB query language (EJB QL)
JDBC and SQL review
Bean-managed persistence
Comparison of EJB and JDO (Java Data Objects)
Session beans
Stateless session beans and stateful session beans
Java Message Service (JMS) review
Message-driven beans
SOAP and WSDL (web services description language) review
EJB 2.1 and Web Services

Site Requirements

One PC with Java 1.4 (Forte, JBuilder or Cafe) and J2EE, per participant (including one for the lecturer), preferably networked and with a printer
Data projector with a real 1024 x 768 resolution, and suitable screen
White-board, preferably not doubling up as the projector's screen; blackboard and chalk are acceptable
Flip-chart and easel, with additional flip-chart paper

Contacting

Please contact Matrice by telephone on +44 7010 704705; by fax on +44 7010 704706; by emailing bookings@matrice.co.uk; or by visiting http://www.matrice.co.uk