Module schema_cache 

Schema Cache

Opt-in in-memory cache for collection schema metadata (primary_key_alias, fields, version). Eliminates redundant schema API calls for ID extraction and field validation.

Features

• LRU eviction: bounded memory — oldest entries evicted when capacity exceeded
• TTL expiry: entries go stale after configurable duration (default 5 min)
• Realtime invalidation: handle_schema_changed() for WS/SSE push events
• Thread-safe: Mutex-protected HashMap/VecDeque (low contention, no extra deps)
• Fast guard when disabled: lookups and inserts short-circuit via enabled flag

Structs

CachedSchema

Cached schema metadata for a single collection.

SchemaCache

Thread-safe, opt-in schema cache with LRU eviction and TTL expiry.

SchemaCacheConfig

Configuration for the schema cache.