diff options
Diffstat (limited to 'tvix/store/src/pathinfoservice/grpc.rs')
| -rw-r--r-- | tvix/store/src/pathinfoservice/grpc.rs | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/tvix/store/src/pathinfoservice/grpc.rs b/tvix/store/src/pathinfoservice/grpc.rs new file mode 100644 index 000000000000..4e15a5bb0b5b --- /dev/null +++ b/tvix/store/src/pathinfoservice/grpc.rs @@ -0,0 +1,204 @@ +use super::PathInfoService; +use crate::proto::{self, ListPathInfoRequest, PathInfo}; +use async_stream::try_stream; +use futures::stream::BoxStream; +use tonic::{async_trait, transport::Channel, Code}; +use tvix_castore::{proto as castorepb, Error}; + +/// Connects to a (remote) tvix-store PathInfoService over gRPC. +#[derive(Clone)] +pub struct GRPCPathInfoService { + /// The internal reference to a gRPC client. + /// Cloning it is cheap, and it internally handles concurrent requests. + grpc_client: proto::path_info_service_client::PathInfoServiceClient<Channel>, +} + +impl GRPCPathInfoService { + /// construct a [GRPCPathInfoService] from a [proto::path_info_service_client::PathInfoServiceClient]. + /// panics if called outside the context of a tokio runtime. + pub fn from_client( + grpc_client: proto::path_info_service_client::PathInfoServiceClient<Channel>, + ) -> Self { + Self { grpc_client } + } +} + +#[async_trait] +impl PathInfoService for GRPCPathInfoService { + async fn get(&self, digest: [u8; 20]) -> Result<Option<PathInfo>, Error> { + let path_info = self + .grpc_client + .clone() + .get(proto::GetPathInfoRequest { + by_what: Some(proto::get_path_info_request::ByWhat::ByOutputHash( + digest.to_vec().into(), + )), + }) + .await; + + match path_info { + Ok(path_info) => { + let path_info = path_info.into_inner(); + + path_info + .validate() + .map_err(|e| Error::StorageError(format!("invalid pathinfo: {}", e)))?; + + Ok(Some(path_info)) + } + Err(e) if e.code() == Code::NotFound => Ok(None), + Err(e) => Err(Error::StorageError(e.to_string())), + } + } + + async fn put(&self, path_info: PathInfo) -> Result<PathInfo, Error> { + let path_info = self + .grpc_client + .clone() + .put(path_info) + .await + .map_err(|e| Error::StorageError(e.to_string()))? + .into_inner(); + + Ok(path_info) + } + + async fn calculate_nar( + &self, + root_node: &castorepb::node::Node, + ) -> Result<(u64, [u8; 32]), Error> { + let path_info = self + .grpc_client + .clone() + .calculate_nar(castorepb::Node { + node: Some(root_node.clone()), + }) + .await + .map_err(|e| Error::StorageError(e.to_string()))? + .into_inner(); + + let nar_sha256: [u8; 32] = path_info + .nar_sha256 + .to_vec() + .try_into() + .map_err(|_e| Error::StorageError("invalid digest length".to_string()))?; + + Ok((path_info.nar_size, nar_sha256)) + } + + fn list(&self) -> BoxStream<'static, Result<PathInfo, Error>> { + let mut grpc_client = self.grpc_client.clone(); + + let stream = try_stream! { + let resp = grpc_client.list(ListPathInfoRequest::default()).await; + + let mut stream = resp.map_err(|e| Error::StorageError(e.to_string()))?.into_inner(); + + loop { + match stream.message().await { + Ok(o) => match o { + Some(pathinfo) => { + // validate the pathinfo + if let Err(e) = pathinfo.validate() { + Err(Error::StorageError(format!( + "pathinfo {:?} failed validation: {}", + pathinfo, e + )))?; + } + yield pathinfo + } + None => { + return; + }, + }, + Err(e) => Err(Error::StorageError(e.to_string()))?, + } + } + }; + + Box::pin(stream) + } +} + +#[cfg(test)] +mod tests { + use std::time::Duration; + + use tempfile::TempDir; + use tokio::net::UnixListener; + use tokio_retry::strategy::ExponentialBackoff; + use tokio_retry::Retry; + use tokio_stream::wrappers::UnixListenerStream; + + use crate::pathinfoservice::MemoryPathInfoService; + use crate::proto::path_info_service_client::PathInfoServiceClient; + use crate::proto::GRPCPathInfoServiceWrapper; + use crate::tests::fixtures; + use crate::tests::utils::gen_blob_service; + use crate::tests::utils::gen_directory_service; + + use super::GRPCPathInfoService; + use super::PathInfoService; + + /// This ensures connecting via gRPC works as expected. + #[tokio::test] + async fn test_valid_unix_path_ping_pong() { + let tmpdir = TempDir::new().unwrap(); + let socket_path = tmpdir.path().join("daemon"); + + let path_clone = socket_path.clone(); + + // Spin up a server + tokio::spawn(async { + let uds = UnixListener::bind(path_clone).unwrap(); + let uds_stream = UnixListenerStream::new(uds); + + // spin up a new server + let mut server = tonic::transport::Server::builder(); + let router = server.add_service( + crate::proto::path_info_service_server::PathInfoServiceServer::new( + GRPCPathInfoServiceWrapper::new(Box::new(MemoryPathInfoService::new( + gen_blob_service(), + gen_directory_service(), + )) + as Box<dyn PathInfoService>), + ), + ); + router.serve_with_incoming(uds_stream).await + }); + + // wait for the socket to be created + Retry::spawn( + ExponentialBackoff::from_millis(20).max_delay(Duration::from_secs(10)), + || async { + if socket_path.exists() { + Ok(()) + } else { + Err(()) + } + }, + ) + .await + .expect("failed to wait for socket"); + + // prepare a client + let grpc_client = { + let url = url::Url::parse(&format!("grpc+unix://{}", socket_path.display())) + .expect("must parse"); + let client = PathInfoServiceClient::new( + tvix_castore::tonic::channel_from_url(&url) + .await + .expect("must succeed"), + ); + + GRPCPathInfoService::from_client(client) + }; + + let path_info = grpc_client + .get(fixtures::DUMMY_OUTPUT_HASH.to_vec().try_into().unwrap()) + .await + .expect("must not be error"); + + assert!(path_info.is_none()); + } +} |