22 lines
894 B
Rust
22 lines
894 B
Rust
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use std::future::Future;
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use std::pin::Pin;
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/// Observer notified by [`DedupService`] when a blob's ref_count reaches zero
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/// and it is permanently removed from storage.
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///
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/// Implement this trait on any service that needs to react to blob deletion
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/// (e.g. thumbnail cleanup, CDN invalidation, audit logging). Register with
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/// [`DedupService::add_blob_hook`] during DI wiring.
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///
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/// The boxed-future return keeps the trait dyn-compatible so multiple
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/// implementations can be stored as `Vec<Arc<dyn BlobDeletionHook>>`.
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pub trait BlobDeletionHook: Send + Sync {
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/// Called after the blob file has been removed from disk.
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/// `blob_hash` is the BLAKE3 hex string identifying the blob.
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/// Must be best-effort — must not propagate errors.
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fn on_blob_deleted<'a>(
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&'a self,
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blob_hash: &'a str,
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) -> Pin<Box<dyn Future<Output = ()> + Send + 'a>>;
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}
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