Struct MultiResourcePolicyProvider 

pub struct MultiResourcePolicyProvider { /* private fields */ }

Composite ResourcePolicyProvider that delegates to a list of sub-providers in order, returning the first Some hit.

Each concrete provider (S3ResourcePolicyProvider, SnsResourcePolicyProvider, LambdaResourcePolicyProvider, …) already gates on its own service prefix and returns None for anything it doesn’t own, so composition is short-circuit and order-independent. Server bootstrap builds one of these holding every resource-owning service and passes it to crate::dispatch::DispatchConfig::resource_policy_provider.

This is the extension point for future resource-owning services: adding KMS key policies (or anything else) is a one-line push at bootstrap, never a core-crate refactor.

Implementations

impl MultiResourcePolicyProvider

pub fn new(providers: Vec<Arc<dyn ResourcePolicyProvider>>) -> Self

Build a composite from a list of providers.

pub fn shared( providers: Vec<Arc<dyn ResourcePolicyProvider>>, ) -> Arc<dyn ResourcePolicyProvider>

Shared constructor returning the composite as an Arc<dyn ResourcePolicyProvider>, matching the signature of DispatchConfig::resource_policy_provider.

pub fn len(&self) -> usize

Number of sub-providers held by this composite. Used by tests.

pub fn is_empty(&self) -> bool

True when no sub-providers are registered.

Trait Implementations

impl ResourcePolicyProvider for MultiResourcePolicyProvider

fn resource_policy(&self, service: &str, resource_arn: &str) -> Option<String>

Fetch the resource-based policy document attached to resource_arn on service. Both arguments are lowercase-ish ("s3", "arn:aws:s3:::my-bucket"); implementations should match the service prefix they own and return None for anything else so providers can be composed safely.