Enterprise JavaBeans (EJB)

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Articles:
  • Enterprise JavaBeans (4th Edition) (Review Project) by Richard Monson-Haefel   - [Clicks: 53]
    Enterprise JavaBeans (4th edition) provides a thorough introduction to working with the new 2.1 version of the EJB Specification, which contains significant changes from the earlier version. With the new specification, EJB extends its support for Web Services and the Java Web Services APIs, expands its asynchronous messaging support, adds XML Schema for deployment descriptors, and introduces a new Timer service which allows for scheduling EJB jobs.
    http://www.theserverside.com/resources/ejbReview.jsp - Oct, 2003
  • Add concurrent processing with message-driven beans by Amit Poddar   - [Clicks: 37]
    Adding concurrency to an application in the J2EE (Java 2 Platform, Enterprise Edition) framework is severely restricted because of two main reasons; first, the EJB (Enterprise JavaBeans) specification restricts spawning new user threads in an EJB container, and second, methods on a session bean can only be invoked synchronously. However, many applications require concurrent implementations to ensure an acceptable response time. There are multiple ways to overcome these limitations. Messaging becomes the obvious choice because of its inherent asynchronous nature and strong integration with J2EE application servers via JMS (Java Message Service) and message-driven beans (MDBs). This article describes in detail how MDBs can effectively provide concurrency to J2EE applications.
    http://www.javaworld.com/javaworld/jw-07-2003/jw-0718-mdb.html - Jul, 2003
  • JDO or CMP? by David Jordan, Craig Russell   - [Clicks: 25]
    Here's a brief excerpt from Chapter 17 of our book, Java Data Objects, which summarizes the key trade-offs between using JDO and CMP for your enterprise application.
    http://www.onjava.com/pub/a/onjava/2003/05/21/jdo.html - May, 2003
  • How does EJB encapsulate business logic? by Jeff Hanson   - [Clicks: 41]
    The EJB component model adds a number of key features for distributed component systems. This article will help you drill down on how JavaBeans interact with other resources.
    http://builder.com.com/5100-6370-1049641.html?tag=sc - Mar, 2003
  • EJB Free and Open Source Tools Summary by Emmanuel Proulx   - [Clicks: 10]
    People often ask me "What's the best platform for J2EE development?" There's no clear answer for this question. First, the vendors each provide contradictory facts to prove that their product is the best. Second, each has its zealots who will tell you all of the good things about one server and bad things about the others. Third, there are dozens of products available out there.
    http://www.onjava.com/pub/a/onjava/2003/02/26/ejbinherit5.html - Feb, 2003
  • OpenEJB: EJB for Tomcat by Jacek Laskowski   - [Clicks: 54]
    The aim of this article is to present an easy yet powerful way of combining Tomcat with OpenEJB so that a web application deployed in Tomcat becomes an OpenEJB client in a fully J2EE-compliant manner.
    http://www.onjava.com/pub/a/onjava/2003/02/12/ejb_tomcat.html - Feb, 2003
  • Automating EJB Unit Testing by JiRong Hu   - [Clicks: 29]
    We have looked for a better way to test our EJB and web applications for a long time. We have seen many ideas and debates on this topic, such as how many databases are required, which framework is better, etc. Instead of finding a perfect solution, we tried to simplify the problem. The simplest solution could possibly work.
    [Includes sample code]
    http://www.onjava.com/pub/a/onjava/2003/02/05/automate_ejb.html - Feb, 2003
  • EJB Inheritance, Part 4 by Emmanuel Proulx   - [Clicks: 26]
    This article discusses the steps involved in using inheritance in message-driven beans.
    http://www.onjava.com/pub/a/onjava/2003/01/29/ejbinherit4.html - Jan, 2003

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Chat Transcripts:
  • Enterprise JavaBeans (EJB) Technology by Linda DeMichiel, Ken Saks   - [Clicks: 36]
    Our guests today are Linda DeMichiel, the EJB 2.1 Spec Lead, and Ken Saks, Sun's lead architect for implementation of the EJB 2.1 container. They're ready to answer your EJB technology questions, especially questions about the EJB 2.1 spec and its implementation.
    http://java.sun.com/developer/community/chat/JavaLive/2003/jl0826.html - Aug, 2003

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Presentations:

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Tips:
  • Advanced EJB QL, EJB QL Select Methods by Mark Johnson   - [Clicks: 14]
    The first tip provides examples of more advanced EJB QL, and the second tip shows how to write and use EJB select methods.
    [You can download the sample archive for these tips.]
    http://java.sun.com/developer/EJTechTips/2003/tt0929.html - Sep, 2003
  • Finder Methods and EJB-QL by Mark Johnson   - [Clicks: 19]
    This tip provides introductory examples of using Enterprise JavaBeans Query Language (EJB QL). Specifically, it shows how to use EJB QL to create finder methods for entity beans in EJB version 2.0 and above.
    [You can download the sample archive for these tips.]
    http://java.sun.com/developer/EJTechTips/2003/tt0825.html#2 - Aug, 2003

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