Struct InMemoryDistributedLocker 

pub struct InMemoryDistributedLocker { /* private fields */ }

An in-process reference DistributedLocker.

Share one instance (via Arc) between several caches to get cross-instance single-flight within one process. A real cluster uses a Redis-backed locker.

Implementations

impl InMemoryDistributedLocker

pub fn new(clock: Arc<dyn Clock>) -> Self

Creates a locker using clock for lock TTL accounting.

Trait Implementations

impl DistributedLocker for InMemoryDistributedLocker

fn acquire<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ttl: Duration, timeout: Timeout, ) -> Pin<Box<dyn Future<Output = Result<Option<String>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Attempts to acquire the lock for key, waiting up to timeout.

fn release<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, key: &'life1 str, token: &'life2 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Releases a previously-acquired lock. Releasing a token that is no longer held (e.g. it already expired) is a no-op, not an error.