سجلات المخططات (Schema registries) وأنماط التوافق

في هذا الدرس

enforce event compatibility with a schema registry.

الموضوعات المخطط لها

• A schema registry stores versioned schemas (Avro, Protobuf, JSON Schema) per subject, often per topic.
• Producers register the schema; the registry rejects incompatible versions.
• Backward: new schema can read data written with the old one (upgrade consumers first).
• Forward: old schema can read data written with the new one (upgrade producers first).
• Full: both; the safest for long-lived topics. The _TRANSITIVE variants check all earlier versions.
• Avro: adding a field needs a default. Protobuf: never reuse field numbers; reserve removed ones.
• Mode names and defaults differ by registry product; verify version before recording.