JBOSS的架构学习（１）

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其实很早就想好好学习一下Jboss的架构了，非常欣赏其Hot　Deploy的特点；但一直苦于没有好的学习资料，最近上了Jboss网站，突然发现他把很多文档给整理出来了，大喜！我常用的的版本是３．２．＊系列；就从这开始：先是第一篇文档＜Ｊｂｏｓｓ　Ａｄｍｉｎ　Ｄｅｖｅｌｏｐｍｅｎｔ　Ｇｕｉｄｅ＞；其实以前就觉得JMX是比较难理解，希望看完Charpter２能够体味JMX的优雅。

Jboss disadvantages include:

1)Existing deployments may need to be repackaged to avoid duplicate classes. Duplication of classes in a repository can lead to class cast exceptions and linkage errors depending on how the classes are loaded.
2)Deployments that depend on different versions of a given class need to be isolated in separate EARs and a unique HeirarchicalLoaderRepository3 defined using a jboss-app.xml descriptor.