adb42959a3
This allows querying two PathInfoService implementations sequentially, and inserts into the "near" one if it's not there yet. There is no negative cache, and put / listing is not implemented (for now). Change-Id: I24c3d0e0c3c2f0524a6cc7b2f3cbc33eb20cf92b Reviewed-on: https://cl.tvl.fyi/c/depot/+/11636 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
73 lines
2.2 KiB
Rust
73 lines
2.2 KiB
Rust
mod combinators;
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mod from_addr;
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mod grpc;
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mod lru;
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mod memory;
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mod nix_http;
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mod sled;
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#[cfg(any(feature = "fuse", feature = "virtiofs"))]
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mod fs;
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#[cfg(test)]
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mod tests;
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use futures::stream::BoxStream;
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use tonic::async_trait;
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use tvix_castore::Error;
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use crate::proto::PathInfo;
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pub use self::combinators::Cache as CachePathInfoService;
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pub use self::from_addr::from_addr;
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pub use self::grpc::GRPCPathInfoService;
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pub use self::lru::LruPathInfoService;
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pub use self::memory::MemoryPathInfoService;
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pub use self::nix_http::NixHTTPPathInfoService;
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pub use self::sled::SledPathInfoService;
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#[cfg(feature = "cloud")]
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mod bigtable;
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#[cfg(feature = "cloud")]
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pub use self::bigtable::BigtablePathInfoService;
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#[cfg(any(feature = "fuse", feature = "virtiofs"))]
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pub use self::fs::make_fs;
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/// The base trait all PathInfo services need to implement.
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#[async_trait]
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pub trait PathInfoService: Send + Sync {
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/// Retrieve a PathInfo message by the output digest.
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async fn get(&self, digest: [u8; 20]) -> Result<Option<PathInfo>, Error>;
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/// Store a PathInfo message. Implementations MUST call validate and reject
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/// invalid messages.
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async fn put(&self, path_info: PathInfo) -> Result<PathInfo, Error>;
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/// Iterate over all PathInfo objects in the store.
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/// Implementations can decide to disallow listing.
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///
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/// This returns a pinned, boxed stream. The pinning allows for it to be polled easily,
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/// and the box allows different underlying stream implementations to be returned since
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/// Rust doesn't support this as a generic in traits yet. This is the same thing that
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/// [async_trait] generates, but for streams instead of futures.
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fn list(&self) -> BoxStream<'static, Result<PathInfo, Error>>;
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}
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#[async_trait]
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impl<A> PathInfoService for A
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where
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A: AsRef<dyn PathInfoService> + Send + Sync,
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{
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async fn get(&self, digest: [u8; 20]) -> Result<Option<PathInfo>, Error> {
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self.as_ref().get(digest).await
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}
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async fn put(&self, path_info: PathInfo) -> Result<PathInfo, Error> {
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self.as_ref().put(path_info).await
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}
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fn list(&self) -> BoxStream<'static, Result<PathInfo, Error>> {
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self.as_ref().list()
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}
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}
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