pub struct TransactionalTree { /* private fields */ }
Expand description

A transaction that will be applied atomically to the Tree.

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impl TransactionalTree

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pub fn insert<K, V>( &self, key: K, value: V ) -> Result<Option<IVec>, UnabortableTransactionError>where K: AsRef<[u8]> + Into<IVec>, V: Into<IVec>,

Set a key to a new value

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pub fn remove<K>( &self, key: K ) -> Result<Option<IVec>, UnabortableTransactionError>where K: AsRef<[u8]> + Into<IVec>,

Remove a key

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pub fn get<K: AsRef<[u8]>>( &self, key: K ) -> Result<Option<IVec>, UnabortableTransactionError>

Get the value associated with a key

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pub fn apply_batch( &self, batch: &Batch ) -> Result<(), UnabortableTransactionError>

Atomically apply multiple inserts and removals.

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pub fn flush(&self)

Flush the database before returning from the transaction.

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pub fn generate_id(&self) -> Result<u64>

Generate a monotonic ID. Not guaranteed to be contiguous or idempotent, can produce different values in the same transaction in case of conflicts. Written to disk every idgen_persist_interval operations, followed by a blocking flush. During recovery, we take the last recovered generated ID and add 2x the idgen_persist_interval to it. While persisting, if the previous persisted counter wasn’t synced to disk yet, we will do a blocking flush to fsync the latest counter, ensuring that we will never give out the same counter twice.

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impl Clone for TransactionalTree

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fn clone(&self) -> TransactionalTree

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

Performs copy-assignment from source. Read more

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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, U> Into<U> for Twhere 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> 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> ToOwned for Twhere 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 Twhere 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 Twhere 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.