Struct EmbeddedEngine 

#[non_exhaustive]
pub struct EmbeddedEngine {
    pub router: Router,
    pub pool: EmbeddedPool,
    pub instance_id: Uuid,
    pub modules: Vec<String>,
    pub engine_version: &'static str,
}

Engine composed for embedding into a parent binary. See module docs.

Marked #[non_exhaustive] so future fields (graceful-shutdown handle, metrics handle, …) can be added without breaking downstream pattern-matching.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

router: Router

Engine’s axum::Router. Mount on parent’s listener at root, or under a sub-path. URL surface includes:

• /api/v1/engine/* — engine + per-module APIs
• /auth/* — OIDC spec endpoints (when auth module enabled)
• /api/v1/vault/* — vault APIs (when vault module enabled)
• /workflow/, /auth/console, /engine/console, /vault/console — assay-dashboard SPAs

pool: EmbeddedPool

Backend-typed pool engine’s modules use. Parent may share for its own queries; engine confines writes to its own schemas (engine.*, workflow.*, auth.*, vault.* on PG; per- module .db files on sqlite via ATTACH).

instance_id: Uuid

This engine instance’s engine.instances row id. Surface in parent’s introspection endpoints if useful.

modules: Vec<String>

Names of modules attached/enabled at boot. Mirrors EngineState::modules but cloned out so the parent doesn’t need to keep an Arc<EngineState> around.

engine_version: &'static str

assay-engine crate version.