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houseme
8039a4ceae
fix(ecstore): make body-cache hook re-registrable + add e2e regressions ODC-21 (backlog#1126): the GET body-cache hook lived in a first-wins OnceLock. When AppContext is rebuilt (config reload, test re-init) a fresh ObjectDataCacheAdapter is constructed and re-registered, but the OnceLock kept ecstore's GET probe pointed at adapter #1 while every usecase-layer fill and invalidation targeted adapter #2 — silently degrading the feature to a 0% hit rate with no error, log, or metric, and stranding entries in the unreachable cache until their TTL. Replace the slot with RwLock<Option<Arc<dyn GetObjectBodyCacheHook>>> so re-registration atomically swaps to the newest adapter, and log at WARN when a swap replaces a *different* instance (Arc::ptr_eq). RwLock over ArcSwapOption because arc-swap's RefCnt is impl<T> (Sized, thin *mut T) and cannot hold an Arc<dyn Trait> without a sized newtype wrapper; the probe reads the slot once per full-object GET but only clones an Arc, negligible next to the metadata quorum fan-out already done before the probe. Add a test-only clear_get_object_body_cache_hook so tests register/unregister deterministically. With the hook now re-registrable, add true end-to-end regressions that drive get_object_reader (not the full_object_plaintext_len predicate) against a real erasure-coded, genuinely-compressed object via the blackbox make_local_set_disks harness, with a stand-in hook playing the app-layer cache (the injection point production uses; the adapter itself lives above ecstore). These close the gap the predicate-only tests left — a caller that opens a new shortcut serving the cached body directly, the original form of both P0s: - backlog#1108: a raw_data_movement_read must yield the STORED (compressed) bytes, never the cached plaintext. - backlog#1109: a compressed cache hit must publish the DECOMPRESSED length as object_info.size (the UploadPartCopy invariant), with the streamed length matching. - backlog#1146: a restore read (restore_request.days) must serve STORED bytes, not the cache. Mutation-verified each e2e test bites: dropping the raw_data_movement_read gate serves plaintext (fails #1108); removing the hit-site size republication publishes 2972 vs 660000 (fails #1109); dropping the restore gate serves plaintext (fails #1146). Co-authored-by: heihutu <heihutu@gmail.com>