Struct Metadata Cache &nbsp; Copy item path

impl MetadataCache

pub fn new(max_capacity_bytes: u64) -> MetadataCache

Creates a new metadata cache with the specified memory budget in bytes.

pub async fn get(&self, file_path: &str) -> Option<Arc<ParquetMetaData>>

Gets cached metadata for the given file path, if present.

pub async fn insert( &self, file_path: String, metadata: Arc<ParquetMetaData>, serialized_size: u32, )

Inserts metadata into the cache with its serialized size for weight calculation.

pub fn stats(&self) -> (u64, u64)

Returns cache statistics (entry_count, weighted_size_bytes).

Trait Implementations§

impl Debug for MetadataCache

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

impl Default for MetadataCache

fn default() -> MetadataCache

Returns the “default value” for a type. Read more

Auto Trait Implementations§

impl !UnwindSafe for MetadataCache

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into for T
where U: From<T>,

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more