Struct LmdbCache 

pub struct LmdbCache { /* private fields */ }

Persistent crate::Cache implementation using LMDB’s bindings heed

Implementations

impl LmdbCache

pub unsafe fn open(env_path: &Path, capacity: usize) -> Result<Self, Error>

Creates a new LmdbCache at the env_path and set the heed::EnvOpenOptions::map_size to a multiple of the capacity by SignedPacket::MAX_BYTES, aligned to system’s page size, a maximum of 10 TB, and a minimum of 10 MB.

Safety

LmdbCache uses LMDB, opening which is marked unsafe, because the possible Undefined Behavior (UB) if the lock file is broken.

pub fn open_unsafe(env_path: &Path, capacity: usize) -> Result<Self, Error>

Convenient wrapper around Self::open.

Make sure to read the safety section in Self::open

Trait Implementations

impl Cache for LmdbCache

fn capacity(&self) -> usize

Returns the maximum capacity of SignedPackets allowed in this cache.

fn len(&self) -> usize

Returns the number of SignedPackets in this cache.

fn put(&self, key: &CacheKey, signed_packet: &SignedPacket)

Puts SignedPacket into cache.

fn get(&self, key: &CacheKey) -> Option<SignedPacket>

Reads SignedPacket from cache, while moving it to the head of the LRU list.

fn get_read_only(&self, key: &CacheKey) -> Option<SignedPacket>

Reads SignedPacket from cache, without changing the LRU list.

fn is_empty(&self) -> bool

Returns true if this cache is empty.

impl Clone for LmdbCache

fn clone(&self) -> LmdbCache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LmdbCache

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.