Trait event_store_core::backend::Backend

pub trait Backend {
    // Required methods
    fn backend_name() -> &'static str;
    fn create_stream(
        &mut self,
        stream: Stream,
        correlation_id: Uuid
    ) -> Pin<Box<dyn Future<Output = Result<Stream, StorageError>> + Send>>;
    fn delete_stream(
        &mut self,
        stream: &Stream,
        correlation_id: Uuid
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError>> + Send>>;
    fn append_to_stream(
        &mut self,
        stream_uuid: &str,
        events: &[UnsavedEvent],
        correlation_id: Uuid
    ) -> Pin<Box<dyn Future<Output = Result<Vec<Uuid>, StorageError>> + Send>>;
    fn read_stream(
        &self,
        stream_uuid: String,
        version: usize,
        limit: usize,
        correlation_id: Uuid
    ) -> Pin<Box<dyn Future<Output = Result<Vec<RecordedEvent>, StorageError>> + Send>>;
    fn read_stream_info(
        &mut self,
        stream_uuid: String,
        correlation_id: Uuid
    ) -> Pin<Box<dyn Future<Output = Result<Stream, StorageError>> + Send>>;
    fn stream_forward(
        &self,
        stream_uuid: String,
        batch_size: usize,
        correlation_id: Uuid
    ) -> Pin<Box<dyn Stream<Item = Result<Vec<RecordedEvent>, StorageError>> + Send>>;
}

Required Methods

fn backend_name() -> &'static str

fn create_stream( &mut self, stream: Stream, correlation_id: Uuid ) -> Pin<Box<dyn Future<Output = Result<Stream, StorageError>> + Send>>

Create a new stream with an identifier

Errors

The stream creation can fail for multiple reasons:

• pure storage failure (unable to create the stream on the backend)
• The stream already exists

fn delete_stream( &mut self, stream: &Stream, correlation_id: Uuid ) -> Pin<Box<dyn Future<Output = Result<(), StorageError>> + Send>>

Delete a stream from the Backend

Do we need to provide a hard/soft deletion?

Errors

The stream deletion can fail for multiple reasons:

• pure storage failure (unable to delete the stream on the backend)
• The stream doesn’t exists

fn append_to_stream( &mut self, stream_uuid: &str, events: &[UnsavedEvent], correlation_id: Uuid ) -> Pin<Box<dyn Future<Output = Result<Vec<Uuid>, StorageError>> + Send>>

fn read_stream( &self, stream_uuid: String, version: usize, limit: usize, correlation_id: Uuid ) -> Pin<Box<dyn Future<Output = Result<Vec<RecordedEvent>, StorageError>> + Send>>

fn read_stream_info( &mut self, stream_uuid: String, correlation_id: Uuid ) -> Pin<Box<dyn Future<Output = Result<Stream, StorageError>> + Send>>

fn stream_forward( &self, stream_uuid: String, batch_size: usize, correlation_id: Uuid ) -> Pin<Box<dyn Stream<Item = Result<Vec<RecordedEvent>, StorageError>> + Send>>

Implementors