feat: add rss router serving cached resource status#940
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Async equivalent of TwoLevelCache for use with coroutine populate functions: same soft/hard TTL semantics, but coordinated with asyncio primitives instead of a ThreadPoolExecutor. Co-authored-by: Loxeris <30194187+Loxeris@users.noreply.github.com>
…headers The If-Modified-Since header is always GMT (RFC 9110) but it was parsed with astimezone(), which interprets the naive datetime as server-local time. Use replace(tzinfo=timezone.utc) instead. The conditional-request logic (ETag / Last-Modified / 304) is moved out of the configuration router into a reusable apply_cache_headers helper. Co-authored-by: Loxeris <30194187+Loxeris@users.noreply.github.com>
Adds a generic diracx.core.sources module with AsyncCacheableSource and Snapshot, a diracx.cacheable_sources entry-point group, and application factory support: each source is instantiated once per app (so its caches persist across requests) with the database instance matching its db_class, and its read method overrides the create dependency for every implementation class so extensions can substitute their own sources. Routers depending on a source whose database is not available fail at startup, consistent with the handling of missing databases. Co-authored-by: Loxeris <30194187+Loxeris@users.noreply.github.com>
Replaces the per-resource lookups with bulk queries returning every site/resource status across all VOs, keyed by VO so that rows for the same resource in different VOs cannot overwrite each other, plus max(DateEffective)/count queries to serve as cache revisions. The logic layer maps the rows to the rss Pydantic models per VO, skipping storage elements with an incomplete set of access rows. Co-authored-by: Loxeris <30194187+Loxeris@users.noreply.github.com>
Adds the concrete resource status sources (storage, compute, FTS, site)
backed by ResourceStatusDB and serves them through new
/api/rss/{storage,compute,site,fts} endpoints. Responses are read from
an all-VO snapshot cached per source, filtered to the caller's VO, and
carry ETag/Last-Modified headers with 304 support; any authenticated
user may read. Includes the regenerated diracx and gubbins clients.
Closes DIRACGrid#839
Co-authored-by: Loxeris <30194187+Loxeris@users.noreply.github.com>
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Adds the concrete resource status sources (storage, compute, FTS, site)
backed by ResourceStatusDB and serves them through new
/api/rss/{storage,compute,site,fts}endpoints. Responses are read froman all-VO snapshot cached per source, filtered to the caller's VO, and
carry
ETag/Last-Modifiedheaders with 304 support; any authenticateduser may read. Includes the regenerated diracx and gubbins clients.
Replaces #910
Part of #839
Blocked by #936
Blocked by #937
Blocked by #938
Blocked by #939