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Concurrent access is a flawed concept in OO, IMO. Separate development trees is also flawed in an OO design; wrapper classes should be used instead. There is never a reason to have two versions of the same class, with the exception of platform-specific implementations, which of course should be VERY limited. I can't think of a single reason I would ever WANT to have two designers modifying the same class simultaneously, unless my projects were under untenable time deadlines, or my class hierarchy was incorrect and I had classes doing more than one basic function. Under extreme circumstances this may happen, but it should definitely not be a standard development procedure. As to split threads, I think it's a technique that requires VERY careful scrutiny. Other than for platform optimization, as mentioned above, separate development threads are unnecessary in object-oriented programming, unless you're talking about prototyping, and even then you should be using encapsulation to separate the new code and the old code. Direct modification of a base class without having finished prototyping (and thereby having collapsed the design tree) is, in my opinion, a direct path to disaster. Joe Jim Mason wrote: > There is a REAL model for management of classes. > It DOES allow for concurrent access. > It also allows, if needed, for split thread development where necessary. +--- | This is the JAVA/400 Mailing List! | To submit a new message, send your mail to JAVA400-L@midrange.com. | To subscribe to this list send email to JAVA400-L-SUB@midrange.com. | To unsubscribe from this list send email to JAVA400-L-UNSUB@midrange.com. | Questions should be directed to the list owner: joe@zappie.net +---
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