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LambdaBackend

fakecloud_lambda::runtime

Trait LambdaBackend 

Source 
pub trait LambdaBackend:
    Send
    + Sync
    + 'static {
    // Required methods
    fn name(&self) -> &str;
    fn launch<'life0, 'life1, 'life2, 'life3, 'life4, 'async_trait>(
        &'life0 self,
        func: &'life1 LambdaFunction,
        code_zip: Option<&'life2 [u8]>,
        layers: &'life3 [Vec<u8>],
        deploy_id: &'life4 str,
    ) -> Pin<Box<dyn Future<Output = Result<WarmInstance, RuntimeError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait,
             'life3: 'async_trait,
             'life4: 'async_trait;
    fn terminate<'life0, 'life1, 'async_trait>(
        &'life0 self,
        handle: &'life1 BackendHandle,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;

    // Provided methods
    fn reap_stale<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait { ... }
    fn prepull_image<'life0, 'life1, 'async_trait>(
        &'life0 self,
        _image: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<(), RuntimeError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
}

Required Methods§

Source

fn name(&self) -> &str

Short identifier surfaced via logs and introspection (e.g. "docker", "podman", "kubernetes").

Source

fn launch<'life0, 'life1, 'life2, 'life3, 'life4, 'async_trait>( &'life0 self, func: &'life1 LambdaFunction, code_zip: Option<&'life2 [u8]>, layers: &'life3 [Vec<u8>], deploy_id: &'life4 str, ) -> Pin<Box<dyn Future<Output = Result<WarmInstance, RuntimeError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, 'life4: 'async_trait,

Launch a fresh runtime instance for func using the supplied code (for zip-package functions) or func.image_uri (for image package functions). layers are the attached layer ZIPs in attach order. deploy_id is the facade-computed fingerprint used to label resources so reaper logic can correlate.

Source

fn terminate<'life0, 'life1, 'async_trait>( &'life0 self, handle: &'life1 BackendHandle, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Tear down one instance. Must be idempotent — the facade may call this against an already-gone instance during cleanup races.

Provided Methods§

Source

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

Sweep instances that belong to a previous fakecloud process so their function names don’t leak across restarts. Default no-op; backends with out-of-process state should override.

Source

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

Optional hook: pre-warm the runtime image so the first launch() for a function doesn’t pay the cold-pull cost. Called in the background after CreateFunction persists; backends that don’t benefit from pre-pulling (e.g. Kubernetes, which pulls images on the scheduling node anyway) leave this as a no-op.

image is the registry URI fetched from runtime_to_image for Zip-package functions, or the user-supplied ImageUri (already translated to the local registry if applicable) for Image-package functions.

Dyn Compatibility§

This trait is dyn compatible.

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

Implementors§