CachedDbAccess

kaspa_database::prelude

Struct CachedDbAccess 

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pub struct CachedDbAccess<TKey, TData, S = RandomState>
where
    TKey: Clone + Hash + Eq + Send + Sync,
    TData: Clone + Send + Sync + MemSizeEstimator,
{ /* private fields */ }
Expand description

A concurrent DB store access with typed caching.

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impl<TKey, TData, S> CachedDbAccess<TKey, TData, S>
where TKey: Clone + Hash + Eq + Send + Sync, TData: Clone + Send + Sync + MemSizeEstimator, S: BuildHasher + Default,

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pub fn new(db: Arc<DB>, cache_policy: CachePolicy, prefix: Vec<u8>) -> Self

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pub fn read_from_cache(&self, key: TKey) -> Option<TData>
where TKey: Copy + AsRef<[u8]>,

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pub fn has(&self, key: TKey) -> Result<bool, StoreError>
where TKey: Clone + AsRef<[u8]>,

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pub fn read(&self, key: TKey) -> Result<TData, StoreError>
where TKey: Clone + AsRef<[u8]> + ToString, TData: DeserializeOwned,

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pub fn iterator( &self, ) -> impl Iterator<Item = Result<(Box<[u8]>, TData), Box<dyn Error>>> + '_
where TKey: Clone + AsRef<[u8]>, TData: DeserializeOwned,

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pub fn write( &self, writer: impl DbWriter, key: TKey, data: TData, ) -> Result<(), StoreError>
where TKey: Clone + AsRef<[u8]>, TData: Serialize,

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pub fn write_many( &self, writer: impl DbWriter, iter: &mut (impl Iterator<Item = (TKey, TData)> + Clone), ) -> Result<(), StoreError>
where TKey: Clone + AsRef<[u8]>, TData: Serialize,

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pub fn write_many_without_cache( &self, writer: impl DbWriter, iter: &mut impl Iterator<Item = (TKey, TData)>, ) -> Result<(), StoreError>
where TKey: Clone + AsRef<[u8]>, TData: Serialize,

Write directly from an iterator and do not cache any data. NOTE: this action also clears the cache

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pub fn delete(&self, writer: impl DbWriter, key: TKey) -> Result<(), StoreError>
where TKey: Clone + AsRef<[u8]>,

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pub fn delete_many( &self, writer: impl DbWriter, key_iter: &mut (impl Iterator<Item = TKey> + Clone), ) -> Result<(), StoreError>
where TKey: Clone + AsRef<[u8]>,

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pub fn delete_all(&self, writer: impl DbWriter) -> Result<(), StoreError>
where TKey: Clone + AsRef<[u8]>,

Deletes all entries in the store using the underlying rocksdb delete_range operation

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pub fn seek_iterator( &self, bucket: Option<&[u8]>, seek_from: Option<TKey>, limit: usize, skip_first: bool, ) -> impl Iterator<Item = Result<(Box<[u8]>, TData), Box<dyn Error>>> + '_
where TKey: Clone + AsRef<[u8]>, TData: DeserializeOwned,

A dynamic iterator that can iterate through a specific prefix / bucket, or from a certain start point.

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pub fn prefix(&self) -> &[u8] ⓘ

Trait Implementations§

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impl<TKey, TData, S: Clone> Clone for CachedDbAccess<TKey, TData, S>
where TKey: Clone + Hash + Eq + Send + Sync + Clone, TData: Clone + Send + Sync + MemSizeEstimator + Clone,

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fn clone(&self) -> CachedDbAccess<TKey, TData, S>

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<TKey, TData, S> Freeze for CachedDbAccess<TKey, TData, S>

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impl<TKey, TData, S = RandomState> !RefUnwindSafe for CachedDbAccess<TKey, TData, S>

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impl<TKey, TData, S> Send for CachedDbAccess<TKey, TData, S>
where S: Send + Sync,

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impl<TKey, TData, S> Sync for CachedDbAccess<TKey, TData, S>
where S: Send + Sync,

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impl<TKey, TData, S> Unpin for CachedDbAccess<TKey, TData, S>

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impl<TKey, TData, S = RandomState> !UnwindSafe for CachedDbAccess<TKey, TData, 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> Any for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

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fn type_name(&self) -> &'static str

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impl<T> AnySync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

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> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V