Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: EJB


Related Topics
H2O
TMP
NAD
NAM

  
 Enterprise JavaBeans - Wikipedia, the free encyclopedia
Because these are merely Java interfaces and not concrete classes, the EJB container must generate classes for these interfaces that will act as a proxy in the client.
The EJB Specification also defines a mechanism that lets enterprise Java beans be deployed in a similar manner regardless of the specific EJB platform that is chosen.
EJBs should be used in large, distributed, transaction-intensive enterprise scenarios where scalability is a key factor.
en.wikipedia.org /wiki/EJB   (1046 words)

  
 jGuru: EJB FAQ Home Page
EJB and scalability EJB is scalable because it can run in cluster environment.
Compared to the 2.0 specifications, EJB 2.1 have focused the attention in trying to be more "web-services" oriented, and with the improving of some important...
The main difference is that in EJB 2.0, the persistence manager is responsible for mapping the entity bean to the database based on the newly introduced...
www.jguru.com /faq/EJB   (804 words)

  
 Overview of WebLogic Enterprise JavaBeans
EJBs will make it easier to write applications: Application developers will not have to deal with low-level details of transaction and state management, multi-threading, and resource pooling.
This is a critical issue with EJB since the point of EJB is transaction processing -- an application model typically requiring a high degree of scalability.
Because WebLogic's EJB implementation depends upon and takes advantage of the sophisticated infrastructure of WebLogic, WebLogic EJB is fast and scalable, with many additional features that support real-world use of EJB for building complex, distributed systems that depend on security, transactions and state management.
www.weblogic.com /docs/techoverview/ejb.html   (1321 words)

  
 EJB 3.0
In New Life for EJB, Ganesh Prasad and Rajat Taneja argue that the recent specification for EJB 3.0 (available on the JSR 220 page) does not solve the underlying problems of EJB but instead tries to hide them.
In their paper (PDF, 532 KB), they spell out their objections to the EJB 3.0 spec and present what they believe to be a better alternative.
One fundamental thing I believe is that you are trying to solve the EJB2.1 issues, where as the EJB 3.0 spec is primarily focusing on eliminating the complexity of the EJB technology from a different perspective.
www.java.net /cs/user/forum/cs_disc/1838   (3468 words)

  
 WebLogic Frequently Asked Questions: EJB
The rollback may have happened in an earlier EJB invoke that was part of the transaction or the rollback may have occurred because the transaction timed out.
Although EJB 1.0 does not require JDK 1.2, we believe that it would be better if EJB would not proliferate the use of a deprecated class.
According to section 9.6 of the EJB 1.0 specification, it is best to avoid re-entrant calls for entity beans.
www.weblogic.com /docs/techsupport/faq/ejb.html   (2624 words)

  
 Fawcette.com - Develop and Deploy a Simple EJB   (Site not responding. Last check: 2007-10-18)
Rather than discuss the EJB specification and technology, this article serves as a technical how-to that focuses on developing a simple EJB and deploying it with JBoss.
EJB is one of the main technologies in J2EE.
The EJB developed for this article is a simple one: It's called StringProcessor, and its only capability is to convert a string into upper case.
www.fawcette.com /javapro/2003_01/online/j2ee_bkurniawan_01_09_03   (364 words)

  
 EJB 2.1 Kick Start : Implementing a Solution Using EJB 2.1
EJB implementations contain far fewer lines of Java code then their non-EJB corollaries, but this reduction in SLOC is accompanied by a dramatic increase in implementation information expressed outside Java's purview.
Because EJBs no longer contain code to provide these fundamental behaviors, EJB developers are free to concentrate on writing code that solves business problems instead of computer science problems.
An EJB's class (or sometimes its source code) files and its deployment descriptor are placed into an archive, which is typically a JAR file.
www.stardeveloper.com /articles/display.html?article=2002121701&page=1   (1085 words)

  
 Enterprise JavaBeans by Gopalan Suresh Raj
Then there will be the EJB providers-people responsible for developing the EJBs and the Application assemblers-people that use pre-built EJBs to build their applications.
The two types of containers are session containers that may contain transient, non-persistent EJBs whose states are not saved at all and entity containers that contain persistent EJBs whose states are saved between invocations.
The EJB developer is responsible for creating a deployment descriptor along with his/her bean.
my.execpc.com /~gopalan/java/ejb.html   (773 words)

  
 EJB best practices: Industrial-strength JNDI optimization
EJB applications rely on JNDI lookups to access their beans' home interfaces.
Because EJB apps tend to run multiple beans, and because JNDI lookups are often present in many components, much of an application's performance overhead can be spent on these lookups.
The jGuru EJB fundamentals tutorial (developerWorks, March 2001) provides a comprehensive introduction to Enterprise JavaBeans technology with particular attention to the role of EJB components in distributed-computing scenarios, the architecture, the extension APIs, and the fundamentals of working with EJB technologies.
www-128.ibm.com /developerworks/java/library/j-ejb0924.html   (1038 words)

  
 Java Skyline: Learn EJB
EJB clients are either external or internal and as of EJB 2.0 separate interfaces are provided for external and internal clients.
The EJB container provides access to an entity beans under "managed persistence." Managed persistence means that from an application programmers point of view, you don't need to load the entity bean into memory.
EJB 2.1 provides the ability to deploy a stateless session bean as a Web service end point and makes the EJB container accessible as a Web service implementation.
www.javaskyline.com /learnejb.html   (5142 words)

  
 The Java Community Process(SM) Program - JSRs: Java Specification Requests - detail JSR# 220   (Site not responding. Last check: 2007-10-18)
The purpose of EJB 3.0 is to improve the EJB architecture by reducing its complexity from the EJB developer's point of view.
The goal of the EJB 3.0 Expert Group will be to investigate these directions and to identify and pursue others through which the EJB 3.0 architecture can be simplified and enhanced from the application developer's point of view.
EJB 3.0 will use the facilities defined by JSR-175 to define metadata attributes that can be used to annotate EJB applications.
www.jcp.org /en/jsr/detail?id=220   (1243 words)

  
 PreciseJava.com - Best practices to improve performance in EJB
EJB is a reusable component unlike normal java object that is backed by component architecture, you can deploy an EJB in any EJB compliant server, that can be reused.
Remote EJB means that it extends remote interface so that client communicates with EJB through RMI/RMI-IIOP which involves serialization, marshalling/unmarshalling for every method call and this has costs associated which can be avoided if the client is on the same machine/JVM.
EJB Container calls ejbStore() method when the business method execution completes or when the transaction completes irrespective of change in the bean's data.
www.precisejava.com /javaperf/j2ee/EJB.htm   (9077 words)

  
 Enterprise JavaBeans Technology
EJB technology enables rapid and simplified development of distributed, transactional, secure and portable applications based on Java technology.
Mapping CMP EJB Beans in Sun Java System Application Server 8 and J2EE 1.4 SDK To relate an object-based model to a relational model of data, you can use Deployment Tool to assemble CMP EJB beans and create mappings between those beans and a database while packaging an application.
For example, EJB Deployment in the J2EE 1.4 SDK is now much faster than in previous releases thanks to a new feature called Dynamic RMI-IIOP.
java.sun.com /products/ejb   (536 words)

  
 EJB Tasks
This scheme is useful when you are using one bean per EJB jar and where you may be deploying the same bean classes in different beans, with different deployment characteristics.
The files in the support fileset are added into the generated EJB jar in the same relative location as their location within the support fileset.
For example, if the EJB descriptor ejb/Account-ejb-jar.xml is found in the descriptor directory, the iplanet element will search for an iAS-specific EJB descriptor file named ejb/Account-ias-ejb-jar.xml (if it isn't found, the task will fail) and a JAR file named ejb/Account.jar will be written in the destination directory.
ant.apache.org /manual/OptionalTasks/ejb.html   (5788 words)

  
 Software Reality - EJB's 101 Damnations
EJB represents a radical departure from the Beans model.
EJB is based on an Object Pooling optimisation.
Local and remote object definitions are not transparent, as you inherit from a different interface and have to cast using the narrow convention.
www.softwarereality.com /programming/ejb/conceptual.jsp   (544 words)

  
 Amazon.com: Professional EJB: Books   (Site not responding. Last check: 2007-10-18)
While some titles on EJB are long on theory and short on the nuts and bolts of actually deploying and running beans on real platforms, this book distinguishes itself with plenty of practical code as well as the XML descriptors needed to deploy each sample.
Professional EJB will be a good refresher for those making the transition to EJB 2.0, as well as those developers who are new to Sun's powerful component standard and want to get it right in a hurry.
EJB architect wanna-be's: read this chapter and start to enjoy what used to be sleepless nights.
www.amazon.com /exec/obidos/tg/detail/-/1861005083?v=glance   (2363 words)

  
 XDoclet: Attribute-Oriented Programming - Tag Reference
It is the one compulsory tag for all EJBs, however not all parameters are applicable for all types of beans, and some parameters apply differently for different types of beans.
Define the pattern (using {0} for the EJB name) to be used for constructing the unqualified (package specific) name of the DAO interface.
Define the pattern (using {0} for the EJB name) to be used for constructing the unqualified (package specific) name of the primary key class.
xdoclet.sourceforge.net /xdoclet/tags/ejb-tags.html   (7332 words)

  
 Amazon.com: Enterprise JavaBeans (3rd Edition): Books   (Site not responding. Last check: 2007-10-18)
The Enterprise JavaBean (EJB) architecture was being considered for use in several systems, and I found the standard presentations were not helping me bridge the knowledge gap.
The first three chapters focus on defining the problem set that EJB is intended to solve and the architecture of the solution.
I'm eagerly waiting for EJB 3, in which writing EJB would be as easy as 123 (no more remote and home interfaces) and entity beans are plain old Java objects.
www.amazon.com /exec/obidos/tg/detail/-/0596002262?v=glance   (2020 words)

  
 JBoss.com - EJB 3.0
EJB 3.0's goals are to simplify development, facilitate test driven development, and focus more on writing plain old java objects (POJOs) rather than on complex EJB APIs.
EJB 3.0 has fully embraced Java Annotations introduced in JDK 5.0 and also simplifies the API for CMP entity beans by using Hibernate as the EJB 3.0 Java Persistence engine.
If you want to use EJB 3.0 with the JBoss application server, it is recommended that you download JBoss AS 4.0.3 or higher which will offer a package that includes EJB 3.0.
www.jboss.org /products/ejb3   (434 words)

  
 EJB Resources
If you're new to EJB, the EJB Whitepaper provides a good introductory overview of what EJB is and what it does.
Also, the EJB FAQ is a useful read to get a handle on what EJB is all about.
I should note that it's possible to send JMS messages from an EJB bean now; however, there's no framework in place for received JMS messages to be passed to EJB beans at this point in time.
adams.patriot.net /~tvalesky/ejb.html   (1701 words)

  
 Efficient Entity EJB development
Application server designers are free to use any method desired to persistently store and retrieve EJB data, as long as they fulfill the "entity bean component contract for container managed persistence," as defined by the EJB specification (see Resources).
If the EJB remote implementation class were to implement the EJB remote interface directly, verification of dependencies could be checked at compile time.
For WebSphere, the EJB finder helper class must contain one static String field for each finder method declared in the EJB home interface, and the name of the field must match the name of the finder method.
www-128.ibm.com /developerworks/library/co-ejbmkr/?dwzone=components   (2790 words)

  
 EJB   (Site not responding. Last check: 2007-10-18)
The lack of guidelines for EJB inheritance in the EJB specification does not mean entity bean inheritance isn't a required feature for J2EE applications.
The EJB expert group's decision to use Hibernate as the persistence mechanism in EJB 3.0 gives JBoss all the power.
Since both RMI and EJB offer technology for the development, installation, and management of distributed Java applications in the enterprise, Java developers frequently ask whether one is a better option than the other for their given architectures.
www.devx.com /Java/Door/10599   (1084 words)

  
 Stardeveloper.com -- EJB
EJB 2.1 Kick Start : Implementing a Solution Using EJB 2.1.
Sample chapter from "EJB 2.1 Kick Start" on installing an application server to developing and deploying an EJB on it.
An article on what are EJBs, what they provide, what are different types of EJBs and why to use them.
www.stardeveloper.com /articles?category_id=24   (186 words)

  
 Introduction to EJBs
One of the key facets of applying EJBs is that they allow business functionality to be developed and then deployed independently of the presentational layer.
The EJB itself is concerned only with the latter of these.
These services are used by local and remote clients to look up the EJB and by the EJB itself to look up resources it may need.
www.developer.com /java/ejb/article.php/10931_1434371_2   (1138 words)

  
 TriveraTech  FREE Tutorials: EJB, Struts, CMP-CMR and Web Services   (Site not responding. Last check: 2007-10-18)
The EJB 2.0 Specification is the formal specification for Enterprise JavaBeans™.
It summarizes areas of the Specification of interest to developers who are trying to learn EJB or who know EJB but what a deeper understanding of the underlying architecture.
This document benefits both developers looking to start writing with EJB as well as developers performing a detailed analysis of EJB to determine whether an EJB solution is appropriate for their application.
www.triveratech.com /Downloads2   (590 words)

  
 dev2dev Online: EJB
Test-driven development is important, and testing EJBs has been notoriously cumbersome.
This is the first of two articles and will cover tuning EJB applications specific to stateless and stateful session beans.
Previous editions of this clear and engaging introduction to EJBs were voted the "Best Java Book" by the editors and readers of Java Developer's Journal, the "Best Java Book for Experts," by JavaPro editors, and one of the Top Computer Books by Amazon.com.
dev2dev.bea.com /ejb/index.html   (468 words)

  
 Cetus Links: 16604 Links on Objects and Components / Distributed Objects & Components: Enterprise JavaBeans
CORBA, EJB specifications tighten their embrace (Infoworld, Apr 1999)
EJB - reusability in the Enterprise (Piroz Mohseni, WebTools Mar 1999)
EJB, CORBA and Application Servers Press Kit (OMG, April 1999)
www.cetus-links.org /oo_java_ejb.html   (788 words)

  
 Enterprise JavaBeans (EJB) Best Practices   (Site not responding. Last check: 2007-10-18)
This certification means that a EJB server product has passed over 5,000 compatibility tests, and this helps make it easy to move Java applications between platforms from different vendors.
But EJB's are only part of the Java 2 Enterprise Edition (J2EE), and figuring out how EJB's best fit into your next project is a must for any IT manager or Java developer.
But, to tell the truth, if I was a fulltime developer--it looks like EJB could save me an enormous amount of time (and frustration).
www.extremetech.com /print_article/0,3428,a=11791,00.asp   (829 words)

  
 EJB Cartridge - AndroMDA - EJB - Introduction   (Site not responding. Last check: 2007-10-18)
The purpose of this cartridge is to generate an CMP Entity EJB persistence tier, fronted by Session EJB business object facades.
To learn how to use this cartridge, please see the Profile and Namespace sections.
If you're using MagicDraw as your modeling tool, it is recommended to use the andromda-profile.zip to get an idea about Stereotypes or tagged values to use.
www.andromda.org /andromda-ejb-cartridge   (77 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.