Struct holochain_sqlite::db::DbRead

pub struct DbRead<Kind: DbKindT> { /* fields omitted */ }

A read-only version of DbWrite. This environment can only generate read-only transactions, never read-write.

Implementations

impl<Kind: DbKindT> DbRead<Kind>

pub fn conn(&self) -> DatabaseResult<PConn>

pub fn kind(&self) -> &Kind

Accessor for the DbKindT of the DbWrite

pub fn path(&self) -> &PathBuf

The environment’s path

pub async fn async_reader<E, R, F>(&self, f: F) -> Result<R, E> where
    E: From<DatabaseError> + Send + 'static,
    F: FnOnce(Transaction<'_>) -> Result<R, E> + Send + 'static,
    R: Send + 'static, 

Trait Implementations

impl<Kind: DbKindT> AsRef<DbRead<Kind>> for DbWrite<Kind>

fn as_ref(&self) -> &DbRead<Kind>

Performs the conversion.

impl<Kind: DbKindT> Borrow<DbRead<Kind>> for DbWrite<Kind>

fn borrow(&self) -> &DbRead<Kind>

Immutably borrows from an owned value.

impl<Kind: Clone + DbKindT> Clone for DbRead<Kind>

fn clone(&self) -> DbRead<Kind>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Kind: DbKindT> From<DbWrite<Kind>> for DbRead<Kind>

fn from(original: DbWrite<Kind>) -> Self

Performs the conversion.

impl<Kind: DbKindT> ReadAccess<Kind> for DbRead<Kind>

fn async_reader<'life0, 'async_trait, E, R, F>(
    &'life0 self,
    f: F
) -> Pin<Box<dyn Future<Output = Result<R, E>> + Send + 'async_trait>> where
    E: From<DatabaseError> + Send + 'static,
    F: FnOnce(Transaction<'_>) -> Result<R, E> + Send + 'static,
    R: Send + 'static,
    E: 'async_trait,
    R: 'async_trait,
    F: 'async_trait,
    'life0: 'async_trait,
    Self: 'async_trait, 

Run an async read transaction on a background thread.

fn sync_reader<E, R, F>(&self, f: F) -> Result<R, E> where
    E: From<DatabaseError>,
    F: FnOnce(Transaction<'_>) -> Result<R, E>, 

Run an sync read transaction on a the current thread.

fn kind(&self) -> &Kind

Access the kind of database.