Struct DbSignals 

pub struct DbSignals { /* private fields */ }

Generations and locks in the database, with a replica of the generations in this process.

Implementations

impl DbSignals

pub fn new(db: Db) -> Self

Trait Implementations

impl Signals for DbSignals

fn name(&self) -> &'static str

fn current(&self, namespace: &str) -> Option<u64>

The generation this process last saw, or None before the namespace was ever read here.

fn ensure<'life0, 'life1, 'async_trait>( &'life0 self, namespace: &'life1 str, ) -> Pin<Box<dyn Future<Output = CoreResult<u64>> + Send + 'async_trait>>

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

The generation, seeding the namespace when it is new.

fn bump<'life0, 'life1, 'async_trait>( &'life0 self, namespace: &'life1 str, ) -> Pin<Box<dyn Future<Output = CoreResult<u64>> + Send + 'async_trait>>

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

Moves the namespace to a new generation and returns it.

fn refresh<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = CoreResult<()>> + Send + 'async_trait>>

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

Reloads every generation from the shared store.

fn known<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = CoreResult<Vec<(String, u64)>>> + Send + 'async_trait>>

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

Every namespace the shared store knows, with its generation.

fn lock<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, name: &'life1 str, owner: &'life2 str, ttl: Duration, ) -> Pin<Box<dyn Future<Output = CoreResult<bool>> + Send + 'async_trait>>

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

Takes the named lock for owner until ttl passes or it is released; false while another owner holds it.

fn unlock<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, name: &'life1 str, owner: &'life2 str, ) -> Pin<Box<dyn Future<Output = CoreResult<bool>> + Send + 'async_trait>>

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

Releases the lock when owner holds it; true when it did.