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EventStore

mfm_machine::stores

Trait EventStore 

Source 
pub trait EventStore: Send + Sync {
    // Required methods
    fn head_seq<'life0, 'async_trait>(
        &'life0 self,
        run_id: RunId,
    ) -> Pin<Box<dyn Future<Output = Result<u64, StorageError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn append<'life0, 'async_trait>(
        &'life0 self,
        run_id: RunId,
        expected_seq: u64,
        events: Vec<EventEnvelope>,
    ) -> Pin<Box<dyn Future<Output = Result<u64, StorageError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn read_range<'life0, 'async_trait>(
        &'life0 self,
        run_id: RunId,
        from_seq: u64,
        to_seq: Option<u64>,
    ) -> Pin<Box<dyn Future<Output = Result<Vec<EventEnvelope>, StorageError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}
Expand description

Append-only event store with optimistic concurrency.

Required Methods§

Source

fn head_seq<'life0, 'async_trait>( &'life0 self, run_id: RunId, ) -> Pin<Box<dyn Future<Output = Result<u64, StorageError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Returns the current head sequence for run_id.

Source

fn append<'life0, 'async_trait>( &'life0 self, run_id: RunId, expected_seq: u64, events: Vec<EventEnvelope>, ) -> Pin<Box<dyn Future<Output = Result<u64, StorageError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Appends events atomically if expected_seq matches the current head.

Source

fn read_range<'life0, 'async_trait>( &'life0 self, run_id: RunId, from_seq: u64, to_seq: Option<u64>, ) -> Pin<Box<dyn Future<Output = Result<Vec<EventEnvelope>, StorageError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Reads a contiguous event range starting at from_seq.

Implementors§