Struct ockam_node::storage::FileValueStorage

pub struct FileValueStorage<V> { /* private fields */ }

File Storage There three files involved

• the actual file storing data

• a temporary file used to avoid losing data during writes. The whole data file is copied to the temporary file then the temporary file is renamed

• a lock file. It’s used to control inter-process accesses to the data. Before reading or writing to the data fil, a shared or exclusive lock is first acquired on this file. We don’t lock over the data file directly, because doesn’t play well with the file rename we do

Implementations

impl<V: Default + Serialize + for<'de> Deserialize<'de>> FileValueStorage<V>

pub async fn create(path: &Path) -> Result<Self>

Create and init the file storage

Trait Implementations

impl<V: Clone> Clone for FileValueStorage<V>

fn clone(&self) -> FileValueStorage<V>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<V: Default + for<'a> Deserialize<'a> + Serialize + Send + Sync + 'static> ValueStorage<V> for FileValueStorage<V>

fn update_value<'life0, 'async_trait>( &'life0 self, f: impl 'async_trait + Fn(V) -> Result<V> + Send + Sync + 'static ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>where Self: 'async_trait, 'life0: 'async_trait,

Update the currently stored value

fn modify_value<'life0, 'async_trait, R>( &'life0 self, f: impl 'async_trait + Fn(V) -> Result<(V, R)> + Send + Sync + 'static ) -> Pin<Box<dyn Future<Output = Result<R>> + Send + 'async_trait>>where R: 'async_trait + Send + Sync + 'static, Self: 'async_trait, 'life0: 'async_trait,

Update the currently stored value and return a result R

fn read_value<'life0, 'async_trait, R>( &'life0 self, f: impl 'async_trait + Fn(V) -> Result<R> + Send + Sync + 'static ) -> Pin<Box<dyn Future<Output = Result<R>> + Send + 'async_trait>>where R: 'async_trait + Send + Sync + 'static, Self: 'async_trait, 'life0: 'async_trait,

Read the currently stored value and either return the full value or a subset of it, as R