Struct scylla::GenericCachingSession

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pub struct GenericCachingSession<DeserializationApi, S = RandomState>
where
    S: Clone + BuildHasher,
    DeserializationApi: DeserializationApiKind,
{ /* private fields */ }
Expand description

Provides auto caching while executing queries

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impl<DeserApi, S> GenericCachingSession<DeserApi, S>
where S: Default + BuildHasher + Clone, DeserApi: DeserializationApiKind,

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pub fn from(session: GenericSession<DeserApi>, cache_size: usize) -> Self

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impl<DeserApi, S> GenericCachingSession<DeserApi, S>
where S: BuildHasher + Clone, DeserApi: DeserializationApiKind,

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pub fn with_hasher( session: GenericSession<DeserApi>, cache_size: usize, hasher: S, ) -> Self

Builds a CachingSession from a Session, a cache size, and a BuildHasher, using a customer hasher.

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impl<S> GenericCachingSession<CurrentDeserializationApi, S>
where S: BuildHasher + Clone,

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pub async fn execute_unpaged( &self, query: impl Into<Query>, values: impl SerializeRow, ) -> Result<QueryResult, QueryError>

Does the same thing as Session::execute_unpaged but uses the prepared statement cache.

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pub async fn execute_iter( &self, query: impl Into<Query>, values: impl SerializeRow, ) -> Result<QueryPager, QueryError>

Does the same thing as Session::execute_iter but uses the prepared statement cache.

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pub async fn execute_single_page( &self, query: impl Into<Query>, values: impl SerializeRow, paging_state: PagingState, ) -> Result<(QueryResult, PagingStateResponse), QueryError>

Does the same thing as Session::execute_single_page but uses the prepared statement cache.

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pub async fn batch( &self, batch: &Batch, values: impl BatchValues, ) -> Result<QueryResult, QueryError>

Does the same thing as Session::batch but uses the prepared statement cache.
Prepares batch using CachingSession::prepare_batch if needed and then executes it.

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impl<S> GenericCachingSession<LegacyDeserializationApi, S>
where S: BuildHasher + Clone,

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pub async fn execute_unpaged( &self, query: impl Into<Query>, values: impl SerializeRow, ) -> Result<LegacyQueryResult, QueryError>

👎Deprecated since 0.15.0: Legacy deserialization API is inefficient and is going to be removed soon

Does the same thing as Session::execute_unpaged but uses the prepared statement cache.

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pub async fn execute_iter( &self, query: impl Into<Query>, values: impl SerializeRow, ) -> Result<LegacyRowIterator, QueryError>

👎Deprecated since 0.15.0: Legacy deserialization API is inefficient and is going to be removed soon

Does the same thing as Session::execute_iter but uses the prepared statement cache.

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pub async fn execute_single_page( &self, query: impl Into<Query>, values: impl SerializeRow, paging_state: PagingState, ) -> Result<(LegacyQueryResult, PagingStateResponse), QueryError>

👎Deprecated since 0.15.0: Legacy deserialization API is inefficient and is going to be removed soon

Does the same thing as Session::execute_single_page but uses the prepared statement cache.

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pub async fn batch( &self, batch: &Batch, values: impl BatchValues, ) -> Result<LegacyQueryResult, QueryError>

👎Deprecated since 0.15.0: Legacy deserialization API is inefficient and is going to be removed soon

Does the same thing as Session::batch but uses the prepared statement cache.
Prepares batch using CachingSession::prepare_batch if needed and then executes it.

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impl<DeserApi, S> GenericCachingSession<DeserApi, S>
where S: BuildHasher + Clone, DeserApi: DeserializationApiKind,

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pub async fn prepare_batch(&self, batch: &Batch) -> Result<Batch, QueryError>

Prepares all statements within the batch and returns a new batch where every statement is prepared. Uses the prepared statements cache.

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pub async fn add_prepared_statement( &self, query: impl Into<&Query>, ) -> Result<PreparedStatement, QueryError>

Adds a prepared statement to the cache

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pub fn get_max_capacity(&self) -> usize

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pub fn get_session(&self) -> &GenericSession<DeserApi>

Trait Implementations§

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impl<DeserializationApi, S> Debug for GenericCachingSession<DeserializationApi, S>
where S: Clone + BuildHasher + Debug, DeserializationApi: DeserializationApiKind + Debug,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<DeserializationApi, S> Freeze for GenericCachingSession<DeserializationApi, S>
where S: Freeze,

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impl<DeserializationApi, S = RandomState> !RefUnwindSafe for GenericCachingSession<DeserializationApi, S>

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impl<DeserializationApi, S> Send for GenericCachingSession<DeserializationApi, S>
where S: Send, DeserializationApi: Send,

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impl<DeserializationApi, S> Sync for GenericCachingSession<DeserializationApi, S>
where S: Sync + Send, DeserializationApi: Sync,

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impl<DeserializationApi, S> Unpin for GenericCachingSession<DeserializationApi, S>
where S: Unpin, DeserializationApi: Unpin,

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impl<DeserializationApi, S = RandomState> !UnwindSafe for GenericCachingSession<DeserializationApi, S>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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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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impl<T> IntoEither for T

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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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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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fn vzip(self) -> V

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where S: Into<Dispatch>,

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impl<T> ErasedDestructor for T
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