By Serge Demeyer
ISBN-10: 0080512992
ISBN-13: 9780080512990
ISBN-10: 1558606394
ISBN-13: 9781558606395
The documentation is lacking or out of date, and the unique builders have departed. Your staff has restricted realizing of the approach, and unit assessments are lacking for lots of, if no longer all, of the elements. for those who repair a trojan horse in a single position, one other trojan horse pops up elsewhere within the procedure. lengthy rebuild instances make any swap tough. All of those are symptoms of software program that's as regards to the breaking point.
Many platforms may be upgraded or just thrown away in the event that they now not serve their goal. Legacy software program, even though, is important for operations and wishes to be always on hand and upgraded. how will you lessen the complexity of a legacy procedure sufficiently in order that it may well remain used and tailored at applicable cost?
Based at the authors' business stories, this e-book is a consultant on find out how to opposite engineer legacy structures to appreciate their difficulties, after which reengineer these structures to fulfill new calls for. styles are used to elucidate and clarify the method of figuring out huge code bases, consequently remodeling them to satisfy new requisites. the major perception is that the best layout and association of your process isn't really anything that may be obtrusive from the preliminary requisites by myself, yet quite because of figuring out how those necessities evolve.
* Describes easy methods to opposite engineer a monolithic method to appreciate the way it rather works and the way to spot power problems.
* contains reengineering styles that take on recognized reengineering suggestions usually encountered in object-oriented programming, similar to introducing polymorphism, factoring out universal habit, detecting duplicated code, and knowing design.
* indicates how one can construct a tradition of constant reengineering for attaining versatile and maintainable object-oriented platforms.
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Extra resources for Object Oriented Reengineering Patterns (The Morgan Kaufmann Series in Software Engineering and Programming)
Sample text
Typically, your new colleagues will fall into three categories. The first category comprises the faithful, the people who believe that reengineering is necessary and who trust that you are able to (help them) do it. The second is the category of the skeptical, who believe this whole reengineering business is just a waste of time, either because they want to protect their jobs or because they think the whole project should start again from scratch. The third category is the category of the fence sitters, who do not have a strong opinion on whether this reengineering will pay off, so they just wait and see what happens.
Example While taking over XDoctor, your company has been trying to persuade the original development team to stay on and merge the two software systems into one. Unfortunately, only one m e m b e r - - D a v e - - h a s agreed to stay, and the three others have left for another company. As it is your job to develop a plan for how to merge the two products, you invite Dave to lunch to have an informal chat about the system. During this chat you learn a great deal. The good news is that Dave was responsible for implementing the Internet communication protocols handling the transactions with the health insurance companies.
Improve your estimates during the reengineering project by keeping logs of how m u c h your team actually reengineered. If you need to split the code up, stay as close as possible to current system structure and the organization of the maintenance team. Once you have a good understanding of the system structure, consider alternatives that are better suited for the project goal. 9 Time is scarce. Wasting time early in a project has severe consequences later on. This is especially relevant during reverse engineering because there you feel uncertain and then it is tempting to start an activity that will keep you busy for a while instead of addressing the root of the problem.
Object Oriented Reengineering Patterns (The Morgan Kaufmann Series in Software Engineering and Programming) by Serge Demeyer
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