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|
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());
}
}
|
