Struct KvStore

pub struct KvStore { /* private fields */ }

The KvStore stores string key/value pairs.

Key/value pairs are persisted to disk in log files. Log files are named after monotonically increasing generation numbers with a log extension name. A BTreeMap in memory stores the keys and the value locations for fast query.

use std::env::current_dir;
let mut store = KvStore::open(current_dir()?)?;
store.set("key".to_owned(), "value".to_owned())?;
let val = store.get("key".to_owne())?;
assert_eq!(val, Some("value".to_owned()));

Implementations

impl KvStore

pub fn open<T: Into<PathBuf>>(path: T) -> Result<Self>

Opens a KvStore with the given path.

pub fn set(&mut self, key: String, value: String) -> Result<()>

Sets the value of s string key to a string.

pub fn get(&mut self, key: String) -> Result<Option<String>>

Gets the string value for a given key.

pub fn has_key(&self, key: String) -> bool

Check if key exists in the cache

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

Removes the given key.