Struct holochain_state::prelude::DbRead
source · [−]pub struct DbRead<Kind> where
Kind: DbKindT, { /* private fields */ }
Expand description
A read-only version of DbWrite. This environment can only generate read-only transactions, never read-write.
Implementations
sourceimpl<Kind> DbRead<Kind> where
Kind: DbKindT,
impl<Kind> DbRead<Kind> where
Kind: DbKindT,
pub fn conn(&self) -> Result<PConn, DatabaseError>
pub async fn conn_permit(&'_ self) -> PConnPermit
pub async fn async_reader<E, R, F>(&'_ self, f: F) -> Result<R, E> where
E: 'static + From<DatabaseError> + Send,
F: 'static + FnOnce(Transaction<'_>) -> Result<R, E> + Send,
R: 'static + Send,
Trait Implementations
sourceimpl<Kind> PermittedConn for DbRead<Kind> where
Kind: DbKindT,
impl<Kind> PermittedConn for DbRead<Kind> where
Kind: DbKindT,
pub fn from_permit(
&self,
permit: PConnPermit
) -> Result<PConnGuard, DatabaseError>
sourceimpl<Kind> ReadAccess<Kind> for DbRead<Kind> where
Kind: DbKindT,
impl<Kind> ReadAccess<Kind> for DbRead<Kind> where
Kind: DbKindT,
sourcepub fn async_reader<'life0, 'async_trait, E, R, F>(
&'life0 self,
f: F
) -> Pin<Box<dyn Future<Output = Result<R, E>> + Send + 'async_trait, Global>> where
'life0: 'async_trait,
E: 'static + From<DatabaseError> + Send + 'async_trait,
F: 'static + FnOnce(Transaction<'_>) -> Result<R, E> + Send + 'async_trait,
R: 'static + Send + 'async_trait,
DbRead<Kind>: 'async_trait,
pub fn async_reader<'life0, 'async_trait, E, R, F>(
&'life0 self,
f: F
) -> Pin<Box<dyn Future<Output = Result<R, E>> + Send + 'async_trait, Global>> where
'life0: 'async_trait,
E: 'static + From<DatabaseError> + Send + 'async_trait,
F: 'static + FnOnce(Transaction<'_>) -> Result<R, E> + Send + 'async_trait,
R: 'static + Send + 'async_trait,
DbRead<Kind>: 'async_trait,
Run an async read transaction on a background thread.
sourcepub fn sync_reader<E, R, F>(&self, f: F) -> Result<R, E> where
E: From<DatabaseError>,
F: FnOnce(Transaction<'_>) -> Result<R, E>,
pub 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.
Auto Trait Implementations
impl<Kind> !RefUnwindSafe for DbRead<Kind>
impl<Kind> Send for DbRead<Kind>
impl<Kind> Sync for DbRead<Kind>
impl<Kind> Unpin for DbRead<Kind> where
Kind: Unpin,
impl<Kind> !UnwindSafe for DbRead<Kind>
Blanket Implementations
impl<T> Any for T where
T: Any + ?Sized,
impl<T> Any for T where
T: Any + ?Sized,
fn type_id_compat(&self) -> TypeId
fn type_id_compat(&self) -> TypeId
TODO: once 1.33.0 is the minimum supported compiler version, remove Any::type_id_compat and use StdAny::type_id instead. https://github.com/rust-lang/rust/issues/27745 Read more
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> FutureExt for T
impl<T> FutureExt for T
fn with_context(self, otel_cx: Context) -> WithContext<Self>
fn with_context(self, otel_cx: Context) -> WithContext<Self>
fn with_current_context(self) -> WithContext<Self>
fn with_current_context(self) -> WithContext<Self>
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
impl<T> Pointable for T
impl<T> Pointable for T
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcepub fn to_owned(&self) -> T
pub fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
sourcepub fn clone_into(&self, target: &mut T)
pub fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
pub fn vzip(self) -> V
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more