Struct BackendFactory 

pub struct BackendFactory;

Factory for creating storage backends.

Centralizes backend initialization with consistent error handling.

Example

use subcog::services::{BackendFactory, PathManager};

let paths = PathManager::for_repo("/path/to/repo");
let backends = BackendFactory::create_all(&paths);

if backends.is_complete() {
    println!("All backends initialized successfully");
}

Implementations

impl BackendFactory

pub fn create_all(index_path: &Path, vector_path: &Path) -> BackendSet

Creates all backends using the provided path configuration.

Returns a BackendSet with successfully initialized backends. Failed backends are logged and set to None.

Arguments

• index_path - Path for SQLite index database
• vector_path - Path for vector index files

Returns

A BackendSet containing available backends.

pub fn create_embedder() -> Option<Arc<dyn Embedder>>

Creates the embedder backend.

Currently always returns FastEmbedEmbedder. In the future, this could be configured to use different embedding models.

pub fn create_index_backend( path: &Path, ) -> Option<Arc<dyn IndexBackend + Send + Sync>>

Creates the index backend (SQLite FTS5).

Arguments

• path - Path to the SQLite database file

Returns

Some(backend) on success, None if initialization fails.

pub fn create_vector_backend( path: &Path, ) -> Option<Arc<dyn VectorBackend + Send + Sync>>

Creates the vector backend (usearch HNSW).

Arguments

• path - Path to the vector index directory

Returns

Some(backend) on success, None if initialization fails.

pub fn create_with_dimensions( index_path: &Path, vector_path: &Path, dimensions: usize, ) -> BackendSet

Creates backends with custom embedder dimensions.

Useful for testing or when using non-default embedding models.

Arguments

• index_path - Path for SQLite index database
• vector_path - Path for vector index files
• dimensions - Vector embedding dimensions