Winter
2004

 Enterprise JavaBeans
(Seminar 2 SWS)

Instructor: Dipl-Inf. Anatolij Zubow

Computer Science Department
Systems Architecture Group

• Seminar, Praktische Informatik, Hauptstudium
• 2h each week, over one semester (2 SWS).
• Target Audience: Students who wish to develop applications using the Enterprise JavaBeans (EJB) server-side component model.

Credits and grading:

In order to obtain credits for this seminar, participants are expected to:

• Attend regularly (at least 90%).
• Be adequately prepared for discussion (read informal introduction for each topic BEFORE its presentation).
• The seminar covers several topics, as outlined in the syllabus. Each student has to select one topic for presentation (30 min, PowerPoint), followed by a discussion (30 min) (selected documents available).
• Presenters have to summarize their presentation and discussion in a WIKI page.
• Presentations may be given in English or German. All documents are in English (exceptions may be granted).

Prerequisites:

• Successful completion of PI-1.
• Good knowledge of the Java programming language
• Experience with relational databases and SQL

Assignments (Themenvergabe):

• First round of assignments: Tuesday, October 19, 2004, 9-11AM, RUD 26, Room 1.307 (regular time and place).

• Introduction (will be prepared by course instructor) [Introduction_1] [Introduction_2]
  • eBay Case Study
  • Distributed Objects, Server-Side Components, Component Transaction Monitors, Enterprise JavaBeans
• Architectural Overview (Bayarkhuu Munkhbaatar)
  • Enterprise Bean Component, Classes and Interfaces (Remote/Home), Deployment Descriptor (DD), Packaging
  • Bean-Container and Container-Server Contract
• Primary Services (Sebastian Scholz)
  • Resource Management (Instance Pooling/Swapping, Bean Activation/Passivation)
  • Concurrency, Transactions, Persistence, Distributed Objects, Asynchronous Messaging, Timer, Naming, Security
• Remote Method Invocation (RMI) (Lars Westmeier)
  • Location Transparency, Transport Protocols, Limitations
• Developing EJBs (Jan Hegewald)
  • Setting up EJB Server
  • Developing Entity, Session and Message-driven Beans (Interfaces, Bean Class, Deployment Descriptor, Packaging, Creating DB-Schema, Deployment, Writing Client Application)
• Client View (Andreas Furtner)
  • Locating Beans (Naming Service)
  • Client-API (Remote and Local): Home and Business Interfaces, Primary Key Classes, Handles
• EJB Persistence Model (Martin Degenhardt)
  • Abstract Persistence Schema
  • Container-Managed Persistence
  • Container-Managed Relationship
  • Bean-Managed Persistence
• EJB Query Language (EJB QL) (available)
  • Declaring EJB QL (Finder and Select-Methods)
  • Operators (logical and arithmetical)
  • Limitations (comparison with SQL)
• Bean-Container Contract (Carsten Evers)
  • Lifecycle of Entity-Beans (CMP and BMP), Session Beans (stateless and stateful), Message-driven Beans (MDB)
• Asynchronous Messaging (Carsten Jacob)
  • JMS Messaging Model (Publish-and-Subscribe, Point-to-Point)
  • Message-driven Beans (Interfaces, Listener, Message-Selector)
• Transactions (Sebastian Scholz)
  • ACID
  • Declarative Transaction Management (scope, attributes, isolation levels)
  • Container-Managed and Bean-Managed Transactions
• Security (available)
  • Declarative and Programmatic Security
• Timer Service (available)
  • Comparison with Quartz
• EJB and WebServices (Beate Krause)
  • SOAP, WSDL, UDDI, JAX-RPC, EJB Endpoints
• Design Strategies (available)
  • EJB-Design Pattern
  • Performance Aspects
• Further Topics (available)
  • EJB and CORBA/.NET
  • Other Persistence Models – Java Data Objects (JDO)
  • What's new in EJB 3.0

Assignments (Themenvergabe):

Suggested Readings (Books):

• Enterprise JavaBeans Specification, 2.1, http://java.sun.com/products/ejb/docs.html, Sun Microsystems, 2002
• Enterprise JavaBeans by Richard Monson-Haefel, Covers EJB 2.1, O'Reilly, 2004, ISBN 0-596-00530-X
• Java Message Service by R. Monson-Haefel, D. Chappell, O'Reilly, ISBN 0-596-00068-5
• Enterprise JavaBeans 2.1 by Martin Kompf, Galileo Computing, 2004, ISBN 3-898-42420-0
• Java Enterprise in a Nutshell by J. Farley, W. Crawford, D. Flanagan, Covers EJB 2.0, O'Reilly, 2002, ISBN 0-596-00152-5
• EJB Design Patterns by Floyd Marinescu, John Wiley & Sons, 2002, ISBN 0-471-20831-0
• Developing Java Enterprise Applications by S. Asbury, S.R. Weiner, Covers EJB 2.0, John Wiley & Sons, 2001, ISBN 0-471-40593-0
• Java RMI by W. Grosso, O'Reilly, 2002, ISBN 1-565-92452-5
• Professional EJB by Ardatia, Arni, Gabhart, ..., Wrox Press, Covers EJB 2.0, 2001, ISBN 1-861-00508-3
• Java Data Objects by Jordan, Russell, O'Reilly , 2003, ISBN 0-596-00276-9

Documents available for presentation.