Trait KvEngine 

pub trait KvEngine: Send + Sync {
    type RTx<'a>: ReadTx
       where Self: 'a;
    type WTx<'a>: WriteTx
       where Self: 'a;

    // Required methods
    fn begin_read(&self) -> StoreResult<Self::RTx<'_>>;
    fn begin_write(&self, durability: Durability) -> StoreResult<Self::WTx<'_>>;
}

The storage engine: opens read and write transactions.

Send + Sync so one engine handle can be shared across the components that need it. The GAT lifetimes let an engine hand a transaction a borrow of itself (the in-memory engine holds a lock guard for the txn’s lifetime; redb transactions are self-owned, so they simply ignore the lifetime).

Required Associated Types

type RTx<'a>: ReadTx where Self: 'a

type WTx<'a>: WriteTx where Self: 'a

Required Methods

fn begin_read(&self) -> StoreResult<Self::RTx<'_>>

Begin a read transaction (a consistent snapshot).

fn begin_write(&self, durability: Durability) -> StoreResult<Self::WTx<'_>>

Begin a single-writer transaction with the given durability.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl KvEngine for MemEngine

type RTx<'a> = MemReadTx<'a>

type WTx<'a> = MemWriteTx<'a>

impl KvEngine for RedbEngine

type RTx<'a> = RedbReadTx

type WTx<'a> = RedbWriteTx