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use crate::directoryservice::DirectoryGraph;
use crate::directoryservice::LeavesToRootValidator;
use crate::proto;
use crate::{directoryservice::DirectoryService, B3Digest};
use futures::stream::BoxStream;
use futures::TryStreamExt;
use std::ops::Deref;
use tokio_stream::once;
use tonic::{async_trait, Request, Response, Status, Streaming};
use tracing::{instrument, warn};
pub struct GRPCDirectoryServiceWrapper<T> {
directory_service: T,
}
impl<T> GRPCDirectoryServiceWrapper<T> {
pub fn new(directory_service: T) -> Self {
Self { directory_service }
}
}
#[async_trait]
impl<T> proto::directory_service_server::DirectoryService for GRPCDirectoryServiceWrapper<T>
where
T: Deref<Target = dyn DirectoryService> + Send + Sync + 'static,
{
type GetStream = BoxStream<'static, tonic::Result<proto::Directory, Status>>;
#[instrument(skip_all)]
async fn get<'a>(
&'a self,
request: Request<proto::GetDirectoryRequest>,
) -> Result<Response<Self::GetStream>, Status> {
let req_inner = request.into_inner();
let by_what = &req_inner
.by_what
.ok_or_else(|| Status::invalid_argument("invalid by_what"))?;
match by_what {
proto::get_directory_request::ByWhat::Digest(ref digest) => {
let digest: B3Digest = digest
.clone()
.try_into()
.map_err(|_e| Status::invalid_argument("invalid digest length"))?;
Ok(tonic::Response::new({
if !req_inner.recursive {
let directory = self
.directory_service
.get(&digest)
.await
.map_err(|e| {
warn!(err = %e, directory.digest=%digest, "failed to get directory");
tonic::Status::new(tonic::Code::Internal, e.to_string())
})?
.ok_or_else(|| {
Status::not_found(format!("directory {} not found", digest))
})?;
Box::pin(once(Ok(directory)))
} else {
// If recursive was requested, traverse via get_recursive.
Box::pin(
self.directory_service.get_recursive(&digest).map_err(|e| {
tonic::Status::new(tonic::Code::Internal, e.to_string())
}),
)
}
}))
}
}
}
#[instrument(skip_all)]
async fn put(
&self,
request: Request<Streaming<proto::Directory>>,
) -> Result<Response<proto::PutDirectoryResponse>, Status> {
let mut req_inner = request.into_inner();
// We put all Directory messages we receive into DirectoryGraph.
let mut validator = DirectoryGraph::<LeavesToRootValidator>::default();
while let Some(directory) = req_inner.message().await? {
validator
.add(directory)
.map_err(|e| tonic::Status::new(tonic::Code::Internal, e.to_string()))?;
}
// drain, which validates connectivity too.
let directories = validator
.validate()
.map_err(|e| tonic::Status::new(tonic::Code::Internal, e.to_string()))?
.drain_leaves_to_root()
.collect::<Vec<_>>();
let mut directory_putter = self.directory_service.put_multiple_start();
for directory in directories {
directory_putter.put(directory).await?;
}
// Properly close the directory putter. Peek at last_directory_digest
// and return it, or propagate errors.
let last_directory_dgst = directory_putter.close().await?;
Ok(Response::new(proto::PutDirectoryResponse {
root_digest: last_directory_dgst.into(),
}))
}
}
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