coordinator for the National Society of Black Engineers. He can be multiple books, including Enterprise Java Beans by Valesky, Java How to Program by been part of several J2EE projects at i-flex Solutions and Cognizant Technology. Ever wondered why all software project books are complex and tedious to understand! In fact, they should be fast and fun to comprehend. One book that stands. NET The projects in this book abide by two concepts first,.programming j2ee 1 4 ed black book download goudzwaard.info solutions incj2ee projects pdf.
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J2EE Projects Black Book - Free download as PDF File .pdf), Text File .txt) or read online for free. J2EE Projects Black Book. Read J2EE Projects book reviews & author details and more at goudzwaard.info J2EE Projects Paperback – 28 Jun J2EE Projects Black Book. Check our section of free e-books and guides on Java J2ee now! who are interested in developing and deploying J2EE applications on the Sun Java System Application Server Introduction to the J2EE Connector Architecture ( PDF 32P) Design Techniques and Coding Standards for J2EE Projects (Rod Johnson).
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Post Queries. This section contains free e-books and guides on Java J2ee, some of the resources in this section can be viewed online and some of them can be downloaded. Java J2ee Books. Gabrick, D. Ashmore Mirror. J2EE 1. J2EE BluePrints. PDF, 8. For example, the JavaBeans packages are more sophisticated than existing equivalents such as the Apache BeanUtils that came from Struts. Do you actually like EJBs? I think EJB is the right tool for some jobs, but is overused.
It's just one technology that can solve some kinds of problems. I think there are very real downsides in that EJBs are complex to implement and hard to test. On the positive side, you have container services such as container-managed transactions that can simplify complex problems. I think some aspects of EJB are showing their age. I think if it had been designed for J2SE 1.
Dynamic proxies could be used instead of container-generated implementations of component interfaces. This would have avoided the need to keep three source files in synch and made EJBs easier to develop and more intuitive.
NET way of doing things, in which any class that implements the ServicedComponent interface can use some of the same features as EJBs, such as declarative transactions, is more like this. There seems to have been a real backlash against EJB in the last year. I think if you read Chapters 1 and 6 you'll be well equipped to decide when to use EJB, and how to choose between local and remote interfaces if you do.
These are such important decisions that I'm disappointed that most books don't say much about them. As I said before, I don't much like entity beans. There are very few situations in which I'd use them. How much of an improvement will J2EE 1. I think it's more an incremental improvement than a dramatic shift.
It's good to see J2EE mature and stable. I don't see much of significance in Servlet 2. JSP 2.
It effectively brings the JSTL into the core and provides more options for custom tags. The timer service in EJB 2. Which particular problem areas of J2EE will you be addressing next? I'm interested in a lot of things, and J2EE is a big area! I'm still developing my ideas in this area, but I may extend the infrastructure framework that comes with the book to road test such a solution.
Can you tell us your thoughts on this? I'm very excited about AOP and how it will affect enterprise development.
Take CMT. Transactions can be modeled as an aspect. Only a few aspects, such as transactions and security, can be managed by the container, and there's little flexibility in how these are managed. The fact that the container intercepts all method invocations on EJBs isn't fully leveraged. And it opens up many more possibilities. With a widely adopted AOP infrastructure, we could have libraries of aspect interceptors, both application-specific and third party.
Instead of accepting the baggage of an EJB container every time we want something like CMT, we could just chose those services we need. If EJB is a degustation menu where you get everything the chef prepared whether you want it or not, AOP is a la carte. There's a choice between changing the language, as with AspectJ, and a standard Java approach, which uses dynamic proxies to add any number of "interceptors" around a method invocation.
The dynamic proxy approach is less powerful than the custom language approach, but it's much easier to sell in an organization, and I think it's powerful enough for the vast majority of real applications. Arguably AspectJ is too powerful, allowing the potential for buggy aspects to cause strange behavior across a system. There's currently a lot of work going on on the dynamic proxy approach. The Nanning project has already released code to Sourceforge.
Rickard Oberg is working on his own implementation, and I've also been doing some work, extending the framework that comes with the book to add AOP capabilities. Tough question. However, this doesn't mean that it will be widely adopted. Even if a superior technology appears tomorrow from within the J2EE community, it will have an uphill battle for acceptance. I find that people get very worried and defensive when I suggest that there is very little that can be done with EJB that couldn't be done better with AOP.
What do you think about the app and architecture? Is this what Java developers should be following? I don't think much of the Adventure Builder.
However, there are a lot of problems. For example, the web tier classes depend on facade classes, not interfaces. So it's impossible to change how business logic is implemented: for example, to introduce EJB if it were ever necessary.
As I say in the book, I think web services protocols have the potential to displace proprietary protocols such as RMI.
Again Sun have fallen into the trap of using a technology just because it's there, not because it makes sense for the supposed application. At a code level the Adventure Builder is very poor. There are virtually no comments, and many sloppy coding practices.
There's a lot of cut and paste code. The JDBC error handling is also broken; if an attempt to close a statement fails, the connection won't be closed. Overall it's a good advertisement for the kind of coding standards I present in Chapter 4 of the book. These go well beyond the Sun coding conventions, which are basically formatting and simple naming conventions. So I don't think J2EE developers are going to learn much from this new sample app.
It's not realistic and it's not well implemented. Although it ignores a lot of real-world problems, it's unnecessarily complex for what it does. It's sad that Sun doesn't devote enough resources to creating a decent J2EE sample application.
It is important, and Sun have people who could do a good job of it. Unfortunately the applications Sun produce look like they were knocked out quickly by people who had better things to do.
You mentioned checked versus unchecked exceptions.
This is something that you talk about in Chapter 4. Can you explain your position on this? I think that Java developers over-use checked exceptions. It's easy to forget that Java is the only mainstream language that uses checked exceptions.
J2EE developers tend to assume that Java offers the best way of doing everything, but this isn't always the case. The problem is that in typical applications that use checked exceptions exclusively, we end up catching, wrapping and rethrowing exceptions throughout the code base.
As with the Adventure Builder, it's easy to forget to wrap the root cause, meaning that we lose the stack trace. I think checked exceptions are a good feature of the language, but should only be used when all clients should be forced to handle the problem. For example, take an InsufficientFundsException if a user attempts a withdrawal from a banking system.
It's logical to model this as a checked exception. I'd like to read this book on Kindle Don't have a Kindle? Product details Paperback: Dreamtech Press 28 June Language: English ISBN Be the first to review this item Would you like to tell us about a lower price? No customer reviews. Share your thoughts with other customers. Write a product review. Back to top. Get to Know Us.