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should be based on the ESB, as we discussed earlier, because of its message filtering,
screening, and routing functions. Indeed, it was for a quite long time, where OSB played
the role of a Service Gateway and Oracle Web Service Manager was responsible for
policy enforcement, providing a common gateway and individual agents to secure service
interactions.
This approach is still valid and you can use it in your enterprise between the internal SOA
domains, but apparently, some more security-related features have to be added for Mes-
sage Screening (Content Filtering), Authentication, and Authorization.
The Oracle API server has all these requirements nicely covered. See the following
screenshot:
Oracle API Gateway Policy Studio
Originally from Vordel, this gateway has quite extensive workflow capabilities (see the
following screenshot) and is specifically designed to operate in very hostile environments,
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