J2EE AntiPatterns - download pdf or read online

By Bill Dudney, Stephen Asbury, Joseph K. Krozak, Kevin Wittkopf

ISBN-10: 0471480673

ISBN-13: 9780471480679

The insights during this ebook are according to confirmed recommendations from specialists. they'll make sure the luck of your J2EE implementations. invoice Brown, AntiPattern Evangelist All too frequently brought software program is stuffed with insects and poorly appearing approaches.

Unfortunately, uncovering precisely what has long gone mistaken and what has to be performed to right it may be a tough method. targeting J2EE, this cutting edge ebook offers you the instruments you'll have to realize and proper AntiPatternsbad behavior of code and layout. The authors discover the typical blunders which are made whereas constructing J2EE functions and obviously enable you to refactor your manner out of them.

They first catch the AntiPatterns in a template that easily describes their signs and results in addition to their normal factors. Then they consultant you thru the method of reworking the implementation of code to make the layout greater. for every AntiPattern, the authors current you with real-world examples, code, and a minimum of one refactoring.

This procedure may help you write J2EE courses that paintings greater, faster, and with much less attempt. you'll locate greater than fifty [i]J2EE AntiPatterns[/i[ that take on a lot of Javas largest troubl

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A server might even prevent you from doing so, which could break your solution when you upgrade your server. Typical Causes Generally a solution that grows over time, rather than one that was built from scratch, causes this AntiPattern. ■■ The solution is built over time. Often, when the first version of an enterprise solution is built, it is prototyped or implemented in a smaller environment than the one it will ultimately be deployed in. As a result, local data may not be a problem in the development environment.

If that traffic is taxing the network, implementing a new solution in combination with all the existing ones may overload the network. Distribution and Scaling ■■ Overworked machines. Installing numerous J2EE services on one machine means that a single network card may be forced to deal with all of the network bandwidth requirements. This single card becomes a choke point that must be reevaluated. ■■ Not planning for latency. Network messages take time to get from one place to another. You may encounter situations where machine A sends messages to machines B and C, and machine B sends a message to machine C after it receives the messages from A.

Without the oversight of an enterprise-level architect, individual developers may take the easiest route to a solution despite its long-term negative effects. ■■ Lack of experience. Developers new to enterprise solutions, and large-scale deployments, may not have encountered problems with localized data before. They might think that they are applying good object-oriented techniques by encapsulating data, while not realizing that there are larger-scale concepts at work. Known Exceptions Localized data is not always wrong.

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J2EE AntiPatterns by Bill Dudney, Stephen Asbury, Joseph K. Krozak, Kevin Wittkopf

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