Struct radarbase::WriteTransaction

pub struct WriteTransaction<'mmap, K: RadbKey + ?Sized> {
    storage: &'mmap Storage,
    table_id: u64,
    added: HashMap<Vec<u8>, Vec<u8>>,
    removed: HashSet<Vec<u8>>,
    _key_type: PhantomData<K>,
}

Fields

storage: &'mmap Storage

table_id: u64

added: HashMap<Vec<u8>, Vec<u8>>

removed: HashSet<Vec<u8>>

_key_type: PhantomData<K>

Implementations

impl<'mmap, K: RadbKey + ?Sized> WriteTransaction<'mmap, K>

pub(crate) fn new( table_id: u64, storage: &'mmap Storage ) -> WriteTransaction<'mmap, K>

pub fn insert(&mut self, key: &K, value: &[u8]) -> Result<(), Error>

pub fn commit(self) -> Result<(), Error>

change the in-memory (mmap) data structure

pub fn insert_reserve( &mut self, key: &K, value_length: usize ) -> Result<&mut [u8], Error>

Reserve space to insert a key-value pair (without knowing the value yet) The returned reference will have length equal to value_length

pub fn get(&self, key: &K) -> Result<Option<AccessGuard<'_>>, Error>

Get a value from the transaction. If the value is not in the data, it will be fetched from the mmap disk storage.

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

pub fn abort(self) -> Result<(), Error>