Struct rkv::Manager

pub struct Manager<E> { /* fields omitted */ }

A process is only permitted to have one open handle to each Rkv environment. This manager exists to enforce that constraint: don't open environments directly.

By default, path canonicalization is enabled for identifying RKV instances. This is true by default, because it helps enforce the constraints guaranteed by this manager. However, path canonicalization might crash in some fringe circumstances, so the no-canonicalize-path feature offers the possibility of disabling it. See: https://bugzilla.mozilla.org/show_bug.cgi?id=1531887

When path canonicalization is disabled, you must ensure an RKV environment is always created or retrieved with the same path.

Implementations

impl<'e, E> Manager<E> where
    E: BackendEnvironment<'e>, 

pub fn get<'p, P>(
    &self,
    path: P
) -> Result<Option<Arc<RwLock<Rkv<E>>>>, StoreError> where
    P: Into<&'p Path>, 

Return the open env at path, returning None if it has not already been opened.

pub fn get_or_create<'p, F, P>(
    &mut self,
    path: P,
    f: F
) -> Result<Arc<RwLock<Rkv<E>>>, StoreError> where
    F: FnOnce(&Path) -> Result<Rkv<E>, StoreError>,
    P: Into<&'p Path>, 

Return the open env at path, or create it by calling f.

pub fn get_or_create_with_capacity<'p, F, P>(
    &mut self,
    path: P,
    capacity: c_uint,
    f: F
) -> Result<Arc<RwLock<Rkv<E>>>, StoreError> where
    F: FnOnce(&Path, c_uint) -> Result<Rkv<E>, StoreError>,
    P: Into<&'p Path>, 

Return the open env at path with capacity, or create it by calling f.

pub fn get_or_create_from_builder<'p, F, P, B>(
    &mut self,
    path: P,
    builder: B,
    f: F
) -> Result<Arc<RwLock<Rkv<E>>>, StoreError> where
    F: FnOnce(&Path, B) -> Result<Rkv<E>, StoreError>,
    P: Into<&'p Path>,
    B: BackendEnvironmentBuilder<'e, Environment = E>, 

Return a new Rkv environment from the builder, or create it by calling f.

pub fn try_close<'p, P>(
    &mut self,
    path: P,
    options: CloseOptions
) -> Result<(), CloseError> where
    P: Into<&'p Path>, 

Tries to close the specified environment. Returns an error when other users of this environment still exist.

impl Manager<LmdbEnvironment>

pub fn singleton() -> &'static RwLock<Manager<LmdbEnvironment>>

impl Manager<SafeModeEnvironment>

pub fn singleton() -> &'static RwLock<Manager<SafeModeEnvironment>>