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The standard platform for enterprise application development has been EJB but the difficulties of working with it caused it to become unpopular. They also gave rise to lightweight technologies such as Hibernate, Spring, JDO, iBATIS and others, all of which allow the developer to work directly with the simpler POJOs. Now EJB version 3 solves the problems that gave EJB 2 a black eye-it too works with POJOs. POJOs in Action describes the new, easier ways to develop enterprise Java applications. It describes how to make key design decisions when developing business logic using POJOs, including how to organize and encapsulate the business logic, access the database, manage transactions, and handle database concurrency. This book is a new-generation Java applications guide: it enables readers to successfully build lightweight applications that are easier to develop, test, and maintain.
About the Author
Chris Richardson is a developer, architect and mentor with over 20 years of experience. He runs a consulting company that jumpstarts new development projects and helps teams that are frustrated with enterprise Java become more productive and successful. Chris has been a technical leader at a variety of companies including Insignia Solutions and BEA Systems. Chris holds a MA & BA in Computer Science from the University of Cambridge in England. He lives in Oakland, CA.
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Most Helpful Customer Reviews
5.0 out of 5 stars
a classic,
By
This review is from: POJO's in Action: Developing Enterprise Applications with Lightweight Frameworks: Lightweight Frameworks for Enterprise Applications (Paperback)
I bought this book back in 2006 and recently read it again. After having been putting its advice into practice for a couple of years I can say that it is first class for enterprise Java developers who work on database record orientated web applications.
It would be great if the author could get around to doing a 2nd edition to update things in light of JPA and annotation driven spring. The first edition does not suffer from predating JPA as it shows how to use either JDO or hiberante so it is straight forward to apply its principles and techniques when using JPA. Likewise the xml spring configurations it uses are probably easier to explain to someone new to spring who will find it easy to move onto using annotations to configure large parts of spring. I published a demo ajax driven web application as a front-end to the example source code from this book which can no doubt be found with any good search engine.
5.0 out of 5 stars
Excellent Book!,
By
This review is from: POJO's in Action: Developing Enterprise Applications with Lightweight Frameworks: Lightweight Frameworks for Enterprise Applications (Paperback)
This book is excellent and should be read by every Java enterprise developer who is interested in really understanding:
- How to organise business logic using a proper domain model - What are the differences to the usual procedure based approaches we tend to use. - How to leverage Spring and ORM frameworks in the solution. The book deals with other important subjects, for example, transaction management, object locking and testing. If you've read Fowler Patterns of Enterprise Application Architecture and/or Eric Evans Domain Driven Design and didn't really `get it', then this book puts it all together in a meaningful way! For me, the light finally switched on in my brain! Won't tell you everything about Spring, JDO or Hibernate, but you'll see where they fit in. Buy this book!
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Most Helpful Customer Reviews on Amazon.com (beta) Amazon.com:
4.4 out of 5 stars (32 customer reviews) 8 of 8 people found the following review helpful:
4.0 out of 5 stars
Get your POJO workin',
By Thing with a hook - Published on Amazon.com
This review is from: POJO's in Action: Developing Enterprise Applications with Lightweight Frameworks: Lightweight Frameworks for Enterprise Applications (Paperback)
This book covers the use of several lightweight frameworks for developing enterprise applications. If you have no clue at all about the issues involved in enterprise Java, I would not advise reading this yet. Despite being C#-based, Applying Domain-Driven Design and Patterns by Jimmy Nilsson would provide the gentle introduction required. On the other hand, if you've had previous experience with server side programming, and want to be brought up to speed quickly on how POJO-based frameworks can be used to replace EJB 2.x style development, this is right up your alley. If you've got used to computer books belying their dimensions with disappointingly little information, you'll be pleasantly surprised with PiA - it's packed with good content.
What's nice about this book is that it goes beyond the basics of the likes of Spring that most people have read several times already (e.g. explaining what dependency injection is) and actually shows how it obviates the need to run in an EJB container and do JNDI look ups. You don't just get to read about, e.g. lazy and eager loading, the author shows you how to use Hibernate and JDO to implement those strategies. That said, this book is not a replacement for documentation or specialised references, so it doesn't get too bogged down. Particularly helpful is that the author provides pros and cons for each of the different approaches he advocates, which helps put them into perspective. The focus of the book is on using Object Relational Mapping tools, either Hibernate or JDO, in combination with Spring's dependency injection and AOP-based interceptors for transactions. There is also converage of the more procedural-based iBATIS, and using EJB3, although the author does not seem to be a big fan of the latter, despite it being an improvement on EJB2. Many of the persistence-related patterns in Martin Fowler's Patterns of Enterprise Application Architecture are covered here, including the concurrency patterns like pessimistic and optimistic locking. The author shows how to implement these patterns with the frameworks, often showing multiple ways of doing things. He's not afraid to highlight where one framework is lacking compared to another, which is refreshing. As you can perhaps tell, the coverage is predominantly devoted to the persistence layer - there's not much here on the presentation layer, although there is some material on using servlets. If you're looking for lots of detail on how to hook your domain model up to, say, Struts, or one of the many other web frameworks, you won't find much here. My only quibble with the book is that although the author pushes increased testability as a important benefit of freeing oneself from EJB containers (a good thing) and uses JUnit tests to illustrate how to develop a POJO-based application (another good thing), the tests use mock objects heavily. I hesitate to call that a bad thing, as clearly there's a whole bunch of people who are much cleverer than I using them productively, but here there's so much set up and setting of expectations, that the actual test is hard to spot, and the intention difficult to fathom. Your mileage may of course vary. If you're neither an enterprise dummy nor expect, I wholeheartedly recommend this excellent book. 9 of 10 people found the following review helpful:
5.0 out of 5 stars
He Writes with an air of Experience,
By John Matlock "Gunny" - Published on Amazon.com
This review is from: POJO's in Action: Developing Enterprise Applications with Lightweight Frameworks: Lightweight Frameworks for Enterprise Applications (Paperback)
It seems that the Java community has been so fast in developing new tools to assist in system development that it's hard to keep track. In fact, it almost seems that you could spend virtually all your working time on just reading the big thick manuals that each new development seems to require. And then when you want some guidence on which took you should use on any particular project you are faced with an almost religious ferver as to this one vs. that one.
This book is a practical guide to using the new lightweight frameworks with POJO's (Plain Old Java Objects). It gives you an overview of Hibernate, JDO and Spring. More important, is that it defines the features of each with relation to the others. That in, for this kind of thing use this one, and for that kind of thing, use that one. It's clear that Mr. Richardson has used these programs to develop real applications and he shares his knowledge well. 8 of 9 people found the following review helpful:
5.0 out of 5 stars
POJOs, the Revolution,
By Christopher Smith "Java developer" - Published on Amazon.com
This review is from: POJO's in Action: Developing Enterprise Applications with Lightweight Frameworks: Lightweight Frameworks for Enterprise Applications (Paperback)
I interviewed a candidate about four months ago who was recommended as an effective programmer and problem-solver. Unfortunately, although this appeared to be true, the candidate had not kept up-to-date with the movement to "lighter," more testable designs, and hadn't read a Java book since Alur's Core J2EE Patterns. The candidate wasn't hired, but because of his apparent interest in learning about the technologies we were using (Spring, Hibernate), I later mailed him a copy of Rod Johnson's Expert One-on-One J2EE Development without EJB.
If the same thing happened today, I would unreservedly send POJOs In Action. Chris Richardson tackles a very difficult task, surveying an entire movement rather than just a single framework or standard. In my opinion he succeeds wonderfully. Because of the experience and sound judgment that informs his analysis, the result is a trustworthy guide to what is still fairly wild territory. There are without doubt omissions in his coverage, and experienced readers will notice them. I don't consider these complaints significant, because in my opinion they misunderstand the intended audience of this book. I'm not sure exactly how this book will find its way to its correct audience (working software developers who DON'T know Spring, Hibernate, and/or Domain-Driven Design), but really I hope it does. Chris' text is engaging, confident, well-reasoned, and compelling. Hopefully it will help a whole cadre of developers come up to speed quickly. |
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