Struct MongoPool 

#[non_exhaustive]
pub struct MongoPool { /* private fields */ }

Shared MongoDB connection pool.

Uses OnceCell for lazy, one-time async initialization of the MongoDB Client. All backends share the same pool instance via Arc.

Data is isolated by app_id: the effective database name is {db_name}_{app_id}, so two pools created with different app_id values against the same MongoDB instance will not see each other’s data.

Implementations

impl MongoPool

pub fn new(uri: &str, db_name: &str, app_id: &str) -> Self

Create a new pool targeting the given MongoDB URI and database name.

The app_id is appended to db_name (as {db_name}_{app_id}) so that different applications sharing the same MongoDB cluster are fully isolated.

pub fn with_options( uri: &str, db_name: &str, app_id: &str, max_pool_size: Option<u32>, ) -> Self

Create a new pool with an explicit maximum pool size.

When max_pool_size is None, the MongoDB driver’s default (100) is used.

pub async fn db(&self) -> RustvelloResult<Database>

Get (or lazily create) a handle to the configured database.

On first access this also creates recommended indexes. Missing indexes only affect performance, so creation failures are logged but do not prevent startup.