pub(crate) struct SchemaCache<K: Codec, V: Codec, T, D> {
maps: Arc<SchemaCacheMaps<K, V>>,
applier: Applier<K, V, T, D>,
key_migration_by_ids: MigrationCacheMap,
val_migration_by_ids: MigrationCacheMap,
}Expand description
A cache of decoded schemas and schema migrations.
The decoded schemas are a cache of the registry in state, and so are shared process-wide.
On the other hand, the migrations have an N^2 problem and so are per-handle. This also seems reasonable because for any given write handle, the write schema will be the same for all migration entries, and ditto for read handle and read schema.
Fields§
§maps: Arc<SchemaCacheMaps<K, V>>§applier: Applier<K, V, T, D>§key_migration_by_ids: MigrationCacheMap§val_migration_by_ids: MigrationCacheMapImplementations§
Source§impl<K, V, T, D> SchemaCache<K, V, T, D>
impl<K, V, T, D> SchemaCache<K, V, T, D>
pub fn new( maps: Arc<SchemaCacheMaps<K, V>>, applier: Applier<K, V, T, D>, ) -> Self
async fn schemas(&self, id: &SchemaId) -> Option<Schemas<K, V>>
fn key_migration( &mut self, write: &Schemas<K, V>, read: &Schemas<K, V>, ) -> Option<Arc<Migration>>
fn val_migration( &mut self, write: &Schemas<K, V>, read: &Schemas<K, V>, ) -> Option<Arc<Migration>>
fn migration<C: Codec>(write: &C::Schema, read: &C::Schema) -> Option<Migration>
async fn get_or_try_init<MK: Clone + Ord, MV: PartialEq + Debug>( &self, map: &SchemaCacheMap<MK, MV>, key: &MK, f: impl Fn(&BTreeMap<SchemaId, EncodedSchemas>) -> Option<MV>, ) -> Option<Arc<MV>>
Trait Implementations§
Auto Trait Implementations§
impl<K, V, T, D> Freeze for SchemaCache<K, V, T, D>
impl<K, V, T, D> !RefUnwindSafe for SchemaCache<K, V, T, D>
impl<K, V, T, D> Send for SchemaCache<K, V, T, D>
impl<K, V, T, D> Sync for SchemaCache<K, V, T, D>
impl<K, V, T, D> Unpin for SchemaCache<K, V, T, D>
impl<K, V, T, D> !UnwindSafe for SchemaCache<K, V, T, D>
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