Struct Store 

pub struct Store<B: StoreBackend> { /* private fields */ }

Simple Flash Key Value Store

Implementations

impl<B: StoreBackend> Store<B>

pub fn new(backend: B) -> Self

wrap a StoreBackend into a store

pub fn read(&self, key: &str) -> Result<Option<&[u8]>, ReadError>

read from key

pub fn read_str(&self, key: &str) -> Result<Option<&str>, ReadError>

read from key, decode UTF-8

pub fn read_value<'a, T: Deserialize<'a>>( &'a self, key: &str, ) -> Result<Option<T>, Error<B::Error>>

read from key, decode with postcard

pub fn get_bytes_used(&self) -> Result<usize, ReadError>

how many bytes are currently used

equally, offset of free space

pub fn write<V: AsRef<[u8]>>( &mut self, key: &str, value: V, ) -> Result<(), Error<B::Error>>

store a buffer value at key

pub fn write_value<T, V>( &mut self, key: &str, value: &T, value_buf: V, ) -> Result<(), Error<B::Error>>

where T: Serialize, V: AsMut<[u8]>,

encode with postcard, write at key

pub fn remove(&mut self, key: &str) -> Result<(), Error<B::Error>>

store a 0-byte tombstone value at key

pub fn erase(&mut self) -> Result<(), WriteError<B::Error>>

invokes erase on the backend (this is no compaction!)