Struct ParquetCache 

pub struct ParquetCache { /* private fields */ }

Process-wide cache of encoded Parquet exports, keyed by dataset name.

The /datasets/{name}/parquet endpoint serves a complete Parquet file with HTTP range support. A single client (e.g. DuckDB httpfs) issues several requests against it — a HEAD for the length, then ranged GETs for the footer and any row-group metadata — so every request must observe the same bytes. Caching the encoded file makes those requests cheap and consistent; crate::handlers::v1::reload_dataset drops the entry after a successful reload so a fresh export is built on next access.

Implementations

impl ParquetCache

pub fn get(&self, name: &str) -> Option<Arc<Bytes>>

Return the cached export for name, if one has been built.

pub fn insert(&self, name: &str, bytes: Bytes) -> Arc<Bytes>

Store bytes as the export for name, returning the stored handle.

pub fn invalidate(&self, name: &str)

Drop the cached export for name (no-op if absent).

Trait Implementations

impl Default for ParquetCache

fn default() -> ParquetCache

Returns the “default value” for a type.