Distributed, object-oriented middle tier
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CORBA objects (Gateway Containers, Gateway Modules and Gateway Services) implemented in Java. [Scalable, extensible, low-maintenance middle tier]
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Containers define the user environment.
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Modules and Services serve as proxies: they accept the user requests (Front End) and delegate them to the Back End. [Support for distributed, heterogeneous back-end services managed independently from Gateway]
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Note: modules can be implemented in C++; also can be DCOM components
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