Struct log_kv::LogKv

pub struct LogKv<K, V, T> { /* fields omitted */ }

Methods

impl<K, V, T> LogKv<K, V, T> where
    K: Serialize + Deserialize + Eq + Hash,
    V: Serialize + Deserialize,
    T: Read + Write + Seek, 

fn create(cursor: T) -> Result<LogKv<K, V, T>, LogKvError>

fn put<L: Into<K>, W: Into<V>>(
    &mut self,
    key: L,
    value: W
) -> Result<(), LogKvError>

Stores a key-value pair, writing to the given Write.

Examples

use std::io::Cursor;
use log_kv::LogKv;

let mut cursor = Cursor::new(Vec::new());
let mut db : LogKv<String, String, _> = LogKv::create(cursor).unwrap();
db.put("this is a key", "this is a value").unwrap();
let retrieved = db.get("this is a key").unwrap().expect("No value retrieved");
assert_eq!(retrieved, "this is a value");

fn get<L: Into<K>>(&mut self, key: L) -> Result<Option<V>, LogKvError>

Retrieves a value previously stored in the map.

Examples

use std::io::Cursor;
use log_kv::LogKv;

let mut cursor = Cursor::new(Vec::new());
let mut db : LogKv<String, String, _> = LogKv::create(cursor).unwrap();
db.put("A", "a").unwrap();
db.put("B", "b").unwrap();
let retrieved = db.get("A").unwrap().expect("No value
retrieved");
assert_eq!(retrieved, "a");

let not_found = db.get("C").unwrap();
assert_eq!(not_found.is_some(), false);