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Add support for a redis-based reporting for invalid mirrorred objects

David Douard requested to merge generated-differential-D6571-source into generated-differential-D6571-target

The idea is that we check the BaseModel validity at journal deserialization time so that we still have access to the raw object from kafka for complete reporting (object id plus raw message from kafka).

This uses a new ModelObjectDeserializer class that is responsible for deserializing the kafka message (still using kafka_to_value) then immediately create the BaseModel object from that dict. Its convert method is then passed as value_deserializer argument of the JournalClient.

Then, for each deserialized object from kafka, if it's a HashableObject, check its validity by comparing the computed hash with its id.

If it's invalid, report the error in logs, and if configured, register the invalid object in via the reporter callback.

In the cli code, a Redis.set() is used a such a callback (if configured). So it simply stores invalid objects using the object id a key (typically its swhid), and the raw kafka message value as value.

Related to #3693 (closed).

Alse refactor fixer.fix_objects() to extract the inner object_fixers dict allowing to use this dict independently of the fix_objects() function.

Depends on !742 (closed).

Migrated from D6571 (view on Phabricator)

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