Trait DirectWritableKeyValueStore 

pub trait DirectWritableKeyValueStore:
    WithError
    + Send
    + Sync {
    type Batch: SimplifiedBatch + Serialize + DeserializeOwned + Default;

    const MAX_BATCH_SIZE: usize;
    const MAX_BATCH_TOTAL_SIZE: usize;
    const MAX_VALUE_SIZE: usize;

    // Required method
    fn write_batch(
        &self,
        batch: Self::Batch,
    ) -> impl Future<Output = Result<(), Self::Error>> + Send + Sync;
}

Asynchronous direct write key-value operations with simplified batch.

Some backend cannot implement WritableKeyValueStore directly and will require journaling.

Required Associated Constants

const MAX_BATCH_SIZE: usize

The maximal number of items in a batch.

const MAX_BATCH_TOTAL_SIZE: usize

The maximal number of bytes of a batch.

const MAX_VALUE_SIZE: usize

The maximal size of values that can be stored.

Required Associated Types

type Batch: SimplifiedBatch + Serialize + DeserializeOwned + Default

The batch type.

Required Methods

fn write_batch( &self, batch: Self::Batch, ) -> impl Future<Output = Result<(), Self::Error>> + Send + Sync

Writes the batch to the database.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl DirectWritableKeyValueStore for DynamoDbStoreInternal

const MAX_BATCH_SIZE: usize = MAX_TRANSACT_WRITE_ITEM_SIZE

const MAX_BATCH_TOTAL_SIZE: usize = MAX_TRANSACT_WRITE_ITEM_TOTAL_SIZE

const MAX_VALUE_SIZE: usize = VISIBLE_MAX_VALUE_SIZE

type Batch = SimpleUnorderedBatch

impl DirectWritableKeyValueStore for ScyllaDbStoreInternal

const MAX_BATCH_SIZE: usize = MAX_BATCH_SIZE

const MAX_BATCH_TOTAL_SIZE: usize = MAX_BATCH_TOTAL_SIZE

const MAX_VALUE_SIZE: usize = VISIBLE_MAX_VALUE_SIZE

type Batch = UnorderedBatch