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EventStore

mf_persistence::api

Trait EventStore 

Source 
pub trait EventStore: Send + Sync {
    // Required methods
    fn append<'life0, 'async_trait>(
        &'life0 self,
        ev: PersistedEvent,
    ) -> Pin<Box<dyn Future<Output = Result<i64>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn append_batch<'life0, 'async_trait>(
        &'life0 self,
        evs: Vec<PersistedEvent>,
    ) -> Pin<Box<dyn Future<Output = Result<i64>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn load_since<'life0, 'life1, 'async_trait>(
        &'life0 self,
        doc_id: &'life1 str,
        from_lsn: i64,
        limit: u32,
    ) -> Pin<Box<dyn Future<Output = Result<Vec<PersistedEvent>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn latest_snapshot<'life0, 'life1, 'async_trait>(
        &'life0 self,
        doc_id: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<Option<Snapshot>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn write_snapshot<'life0, 'async_trait>(
        &'life0 self,
        snap: Snapshot,
    ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn compact<'life0, 'life1, 'async_trait>(
        &'life0 self,
        doc_id: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}
Expand description

具体后端必须实现的最小持久化接口。

Required Methods§

Source

fn append<'life0, 'async_trait>( &'life0 self, ev: PersistedEvent, ) -> Pin<Box<dyn Future<Output = Result<i64>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

追加单条事件。返回分配的 lsn。

Source

fn append_batch<'life0, 'async_trait>( &'life0 self, evs: Vec<PersistedEvent>, ) -> Pin<Box<dyn Future<Output = Result<i64>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

在单事务内批量追加事件。返回最后一条的 lsn。

Source

fn load_since<'life0, 'life1, 'async_trait>( &'life0 self, doc_id: &'life1 str, from_lsn: i64, limit: u32, ) -> Pin<Box<dyn Future<Output = Result<Vec<PersistedEvent>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

读取指定文档分片自 from_lsn 之后的增量事件，上限为 limit 条。

Source

fn latest_snapshot<'life0, 'life1, 'async_trait>( &'life0 self, doc_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<Snapshot>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

获取指定文档分片的最新快照（如果存在）。

Source

fn write_snapshot<'life0, 'async_trait>( &'life0 self, snap: Snapshot, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

写入/替换快照，应保证原子性。

Source

fn compact<'life0, 'life1, 'async_trait>( &'life0 self, doc_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

可选压缩：删除已被最新快照覆盖的历史事件。

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§