Struct mdl::cache::Cache

pub struct Cache {
    pub env: Environment,
    pub path: String,
    // some fields omitted
}

LMDB cache. This struct implements the Store trait so it can be used to cache Model structs

Fields

env: Environment

LMDB environment

path: String

database path in the filesystem

Implementations

impl Cache

pub fn new(path: &str) -> Result<Cache, Error>

pub fn db(&self, name: &'static str) -> Result<Database, Error>

pub fn rw<F, T>(&self, db: &'static str, op: F) -> Result<T, Error> where
    F: Fn(RwCursor<'_>) -> Result<T, Error>, 

pub fn ro<F, T>(&self, db: &'static str, op: F) -> Result<T, Error> where
    F: Fn(RoCursor<'_>) -> Result<T, Error>, 

Trait Implementations

impl Store for Cache

fn push(&self, db: &'static str, key: &str, value: Vec<u8>) -> Result<(), Error>

Stores the value in the database with the corresponding key

fn pull<F, T>(
    &self,
    db: &'static str,
    key: &str,
    formatter: F
) -> Result<T, Error> where
    F: Fn(&[u8]) -> Result<T, Error>, 

Retrieves the value in the database with the corresponding key Returns an error if the key doesn't exists

fn iter<F>(&self, db: &'static str, prefix: &str, f: F) -> Result<(), Error> where
    F: Fn(&[u8]) -> Continue, 

Iterates over all objects that starts with the prefix and run the function f. If f returns Continue(false) the iteration stops

fn rm(&self, db: &'static str, key: &str) -> Result<(), Error>

Remove the corresponding data in the database by key

fn all<F, T>(
    &self,
    db: &'static str,
    prefix: &str,
    formatter: F
) -> Result<Vec<T>, Error> where
    F: Fn(&[u8]) -> Result<T, Error>, 

Retrieves all items in the database that starts with the prefix key