文件名称:
Manning.OSGi.in.Action.Jul.2010.MEAP
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文件大小: 4mb
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上传时间: 2011-05-05
详细说明： The Java™ platform is an unqualified success story. It is used to develop applications for small mobile devices to massive enterprise endeavors. This is a testament to its well thought out design and continued evolution. However, this success has come in spite of the fact that Java does not have explicit support for building modular systems beyond ordinary objectoriented data encapsulation. So, what does this mean to you? If Java is a success despite its lack of advanced modularization support, then you might wonder if its absen ce is a problem. Most well managed projects have to build up a repertoire of comparable, but project specific, techniques to compensate for the lack of modularization in Java. These include: Programming practices, Tricks with multiple class loaders, and Serialization between in-process components. However these techniques are inherently brittle and error prone since they are not enforceable via any specific compile-time or run-time checks. The end result has detrimental impacts on multiple stages of an application's lifecycle: Development – you are unable to clearly and explicitly partition development into independent pieces. Deployment – you are unable to easily analyze, understand, and resolve requirements imposed by the collection of independently developed pieces that make up the system. Execution – you are unable to manage and evolve the constituent pieces of a running system, nor minimize the impact of doing so. ...展开收缩
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