Hub and spoke pattern

The hub and spoke pattern is a variant of the event broker topology pattern. In the hub and spoke architecture, the hub acts as the centralized broker and the spoke act as adapters that connect applications to the hub. The spoke establishes a connection with an application and converts application data into a format that the hub understands. The hub translates the incoming data into a format that is understood by the destination system and performs routing of messages accordingly. The presence of a single hub makes this architecture easy to manage, but at the same time imposes limits on the scalability of the architecture:

In order to overcome this limitation, the concept of the federated hub and spoke architecture ...

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