Wrong newsgroup or mailing list. If you're looking for JAVA expertise, methinks one of the comp.lang.java.* groups would be more useful.
However, the answer to your question is quite easy. It's a plumbing problem. An end to end enterprise solution is one where you shovel money into one end, and get either manure or magic out the other end. It is often difficult to distinguish between the manure and the magic. The end to end pipe is owned by a single software vendor who will try to maximize the consumption of money at the input end and is often equally unable to distinguish between manure and magic. 3rd party vendors are helpful, but are often unable to recognize which end of the pipe they are suppose to operate. This frequently leads to the software equivalent of constipation, where nothing moves. When you evaluate end to end enterprise solutions, if you think of them in terms of a plumbing analogy, the problems become quite obvious.
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