Struct DataStoreCoordinator 

pub struct DataStoreCoordinator { /* private fields */ }

Host-facing, fenced write coordinator governed by Spec 093.

Implementations

impl DataStoreCoordinator

pub fn new() -> Self

pub fn acquire(&self, owner: &str) -> Result<u64, DataStoreCoordinatorError>

Acquires the exclusive writer lease for owner and returns its generation.

Errors

Returns DataStoreCoordinatorError::OwnerLocked when another owner holds the lease, or DataStoreCoordinatorError::CoordinatorUnavailable when the coordinator state is unavailable or cannot issue another generation.

pub fn validate( &self, owner: &str, generation: u64, ) -> Result<(), DataStoreCoordinatorError>

Validates that owner still holds the supplied lease generation.

Errors

Returns DataStoreCoordinatorError::OwnerLocked when the owner or generation is stale, or DataStoreCoordinatorError::CoordinatorUnavailable when the coordinator state is unavailable.

pub fn release( &self, owner: &str, generation: u64, ) -> Result<(), DataStoreCoordinatorError>

Releases the exclusive writer lease held by owner at generation.

Errors

Returns DataStoreCoordinatorError::OwnerLocked when the owner or generation is stale, or DataStoreCoordinatorError::CoordinatorUnavailable when the coordinator state is unavailable.

Trait Implementations

impl Clone for DataStoreCoordinator

fn clone(&self) -> DataStoreCoordinator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataStoreCoordinator

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

Formats the value using the given formatter.

impl Default for DataStoreCoordinator

fn default() -> Self

Returns the “default value” for a type.