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They are like filters in servlet.
Each Each operation is associated with a method in each interceptors, even if it does nothing else than calling the next interceptor.
The base idea is to allow pre and post actions to be executed before and after the call of the next interceptors :
Each interceptor process the pre action, call the next interceptor, wait for the response, execute the post action, and returns. We have to implement this chain of interceptors in a way which allows us to add new interceptors, or new pre or post actions, without having to modify the existing code or mechanism.
Bind Operation
The Bind operation call the interceptor chain in the PartitionNexusProxy class, where we can found a bind method :
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