Trait cita_trie::DB

pub trait DB {
    // Required methods
    fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>, Error>;
    fn contains(&self, key: &[u8]) -> Result<bool, Error>;
    fn insert(&self, key: Vec<u8>, value: Vec<u8>) -> Result<(), Error>;
    fn remove(&self, key: &[u8]) -> Result<(), Error>;
    fn flush(&self) -> Result<(), Error>;

    // Provided methods
    fn insert_batch(
        &self,
        keys: Vec<Vec<u8>>,
        values: Vec<Vec<u8>>
    ) -> Result<(), Error> { ... }
    fn remove_batch(&self, keys: &[Vec<u8>]) -> Result<(), Error> { ... }
}

“DB” defines the “trait” of trie and database interaction. You should first write the data to the cache and write the data to the database in bulk after the end of a set of operations.

Required Methods

fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>, Error>

fn contains(&self, key: &[u8]) -> Result<bool, Error>

fn insert(&self, key: Vec<u8>, value: Vec<u8>) -> Result<(), Error>

Insert data into the cache.

fn remove(&self, key: &[u8]) -> Result<(), Error>

Insert data into the cache.

fn flush(&self) -> Result<(), Error>

Flush data to the DB from the cache.

Provided Methods

fn insert_batch( &self, keys: Vec<Vec<u8>>, values: Vec<Vec<u8>> ) -> Result<(), Error>

Insert a batch of data into the cache.

fn remove_batch(&self, keys: &[Vec<u8>]) -> Result<(), Error>

Remove a batch of data into the cache.

Implementors

impl DB for MemoryDB