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|
use super::PathInfoService;
use crate::nar::calculate_size_and_sha256;
use crate::proto::PathInfo;
use futures::{stream::iter, Stream};
use prost::Message;
use std::{path::PathBuf, pin::Pin, sync::Arc};
use tonic::async_trait;
use tracing::warn;
use tvix_castore::proto as castorepb;
use tvix_castore::{blobservice::BlobService, directoryservice::DirectoryService, Error};
/// SledPathInfoService stores PathInfo in a [sled](https://github.com/spacejam/sled).
///
/// The PathInfo messages are stored as encoded protos, and keyed by their output hash,
/// as that's currently the only request type available.
pub struct SledPathInfoService {
db: sled::Db,
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
}
impl SledPathInfoService {
pub fn new(
p: PathBuf,
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
) -> Result<Self, sled::Error> {
let config = sled::Config::default()
.use_compression(false) // is a required parameter
.path(p);
let db = config.open()?;
Ok(Self {
db,
blob_service,
directory_service,
})
}
pub fn new_temporary(
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
) -> Result<Self, sled::Error> {
let config = sled::Config::default().temporary(true);
let db = config.open()?;
Ok(Self {
db,
blob_service,
directory_service,
})
}
}
#[async_trait]
impl PathInfoService for SledPathInfoService {
async fn get(&self, digest: [u8; 20]) -> Result<Option<PathInfo>, Error> {
match self.db.get(digest) {
Ok(None) => Ok(None),
Ok(Some(data)) => match PathInfo::decode(&*data) {
Ok(path_info) => Ok(Some(path_info)),
Err(e) => {
warn!("failed to decode stored PathInfo: {}", e);
Err(Error::StorageError(format!(
"failed to decode stored PathInfo: {}",
e
)))
}
},
Err(e) => {
warn!("failed to retrieve PathInfo: {}", e);
Err(Error::StorageError(format!(
"failed to retrieve PathInfo: {}",
e
)))
}
}
}
async fn put(&self, path_info: PathInfo) -> Result<PathInfo, Error> {
// Call validate on the received PathInfo message.
match path_info.validate() {
Err(e) => Err(Error::InvalidRequest(format!(
"failed to validate PathInfo: {}",
e
))),
// In case the PathInfo is valid, and we were able to extract a NixPath, store it in the database.
// This overwrites existing PathInfo objects.
Ok(nix_path) => match self
.db
.insert(*nix_path.digest(), path_info.encode_to_vec())
{
Ok(_) => Ok(path_info),
Err(e) => {
warn!("failed to insert PathInfo: {}", e);
Err(Error::StorageError(format! {
"failed to insert PathInfo: {}", e
}))
}
},
}
}
async fn calculate_nar(
&self,
root_node: &castorepb::node::Node,
) -> Result<(u64, [u8; 32]), Error> {
calculate_size_and_sha256(
root_node,
self.blob_service.clone(),
self.directory_service.clone(),
)
.await
.map_err(|e| Error::StorageError(e.to_string()))
}
fn list(&self) -> Pin<Box<dyn Stream<Item = Result<PathInfo, Error>> + Send>> {
Box::pin(iter(self.db.iter().values().map(|v| match v {
Ok(data) => {
// we retrieved some bytes
match PathInfo::decode(&*data) {
Ok(path_info) => Ok(path_info),
Err(e) => {
warn!("failed to decode stored PathInfo: {}", e);
Err(Error::StorageError(format!(
"failed to decode stored PathInfo: {}",
e
)))
}
}
}
Err(e) => {
warn!("failed to retrieve PathInfo: {}", e);
Err(Error::StorageError(format!(
"failed to retrieve PathInfo: {}",
e
)))
}
})))
}
}
|
