Replace reauthenticate after with automatic reauthentication #2
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This reverts commit aa0ba21 which was never included in the upstream
This expansion of the callback return values allows `kpro_connection` to interrogate the server response message, in preparation for re-authenticating SASL connections before session lifetime expires. Authentication was moved to a separate function to allow repeating authentication flow, which also required storing connection configuration in process state.
The broker response to a SASL authentication request can contain a
maximum session lifetime (see the [KIP][kip]).
Session lifetime is returned by the broker in [Version 1
SaslAuthenticate Response][sasl_authenticate_protocol].
When a SASL authentication callback returns `{ok, ServerResponse}` and
the ServerResponse contains a larger than 0 session lifetime,
kpro_connection automatically sets a timer to re-authenticate in half
the session lifetime.
As kpro_sasl mechanisms are synchronous, in-flight requests must first
be drained to ensure that kpro_sasl receives a response to its own SASL
request.
The draining mechanism is tied to the main loop, flushing the post-drain
queue when `requests` are empty. When requests are not empty, previous
behaviour is retained with the exception of `{From, {send, Req}}`
handler, which adds the request onto the queue when in `drain` state.
[kip]: https://cwiki.apache.org/confluence/display/KAFKA/KIP-368%3A+Allow+SASL+Connections+to+Periodically+Re-Authenticate
[sasl_authenticate_protocol]: https://kafka.apache.org/protocol#The_Messages_SaslAuthenticate
indrekj
approved these changes
Aug 12, 2024
urmastalimaa
deleted the
replace_reauthenticate_after_with_automatic_reauthentication
branch
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Incorporates kafka4beam#122 into our fork