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|
use super::PathInfoService;
use crate::proto::{self, ListPathInfoRequest, PathInfo};
use async_stream::try_stream;
use data_encoding::BASE64;
use futures::stream::BoxStream;
use tonic::{async_trait, transport::Channel, Code};
use tracing::instrument;
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 {
#[instrument(level = "trace", skip_all, fields(path_info.digest = BASE64.encode(&digest)))]
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())),
}
}
#[instrument(level = "trace", skip_all, fields(path_info.root_node = ?path_info.node))]
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)
}
#[instrument(level = "trace", skip_all, fields(root_node = ?root_node))]
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))
}
#[instrument(level = "trace", skip_all)]
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 crate::pathinfoservice::tests::make_grpc_path_info_service_client;
use crate::tests::fixtures;
/// This ensures connecting via gRPC works as expected.
#[tokio::test]
async fn test_valid_unix_path_ping_pong() {
let (_blob_service, _directory_service, path_info_service) =
make_grpc_path_info_service_client().await;
let path_info = path_info_service
.get(fixtures::DUMMY_PATH_DIGEST)
.await
.expect("must not be error");
assert!(path_info.is_none());
}
}
|
