Trait tc_transact::fs::Persist

pub trait Persist<D: Dir>: Sized {
    type Txn: Transaction<D>;
    type Schema: Clone + Send + Sync;

    fn create(
        txn_id: TxnId,
        schema: Self::Schema,
        store: D::Store
    ) -> TCResult<Self>;
    fn load(
        txn_id: TxnId,
        schema: Self::Schema,
        store: D::Store
    ) -> TCResult<Self>;
    fn dir(&self) -> D::Inner;

    fn load_or_create(
        txn_id: TxnId,
        schema: Self::Schema,
        store: D::Store
    ) -> TCResult<Self> { ... }
}

Defines how to load a persistent data structure from the filesystem.

Required Associated Types

type Txn: Transaction<D>

type Schema: Clone + Send + Sync

Required Methods

fn create(txn_id: TxnId, schema: Self::Schema, store: D::Store) -> TCResult<Self>

Create a new instance of Self from an empty Store.

fn load(txn_id: TxnId, schema: Self::Schema, store: D::Store) -> TCResult<Self>

Load a saved instance of Self from persistent storage. Should only be invoked at startup time.

fn dir(&self) -> D::Inner

Access the filesystem directory in which stores this persistent state.

Provided Methods

fn load_or_create(
    txn_id: TxnId,
    schema: Self::Schema,
    store: D::Store
) -> TCResult<Self>

Load a saved instance of Self from persistent storage if present, or create a new one.

Implementors