Struct exonum::storage::MemoryDB

pub struct MemoryDB { /* fields omitted */ }

Database implementation that stores all the data in memory.

It's mainly used for testing and not designed to be efficient.

Methods

impl MemoryDB

fn new() -> MemoryDB

Creates a new, empty database.

Trait Implementations

impl Default for MemoryDB

fn default() -> MemoryDB

Returns the "default value" for a type.

impl Clone for MemoryDB

fn clone(&self) -> MemoryDB

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryDB

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Database for MemoryDB

fn clone(&self) -> Box<Database>

Creates a new reference to the database as Box<Database>.

fn snapshot(&self) -> Box<Snapshot>

Creates a new snapshot of the database from its current state.

fn merge(&mut self, patch: Patch) -> Result<()>

Atomically applies a sequence of patch changes to the database.

fn fork(&self) -> Fork

Creates a new fork of the database from its current state.

impl Snapshot for MemoryDB

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

Returns a value as raw vector of bytes corresponding to the specified key or None if does not exist.

fn contains(&self, name: &str, key: &[u8]) -> bool

Returns true if the snapshot contains a value for the specified key.

fn iter(&self, name: &str, from: &[u8]) -> Iter

Returns an iterator over the entries of the snapshot in ascending order starting from the specified key. The iterator element type is (&[u8], &[u8]).