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use super::PathInfoService;
use crate::{
blobservice::BlobService, directoryservice::DirectoryService, nar::calculate_size_and_sha256,
proto, Error,
};
use std::{
collections::HashMap,
sync::{Arc, RwLock},
};
pub struct MemoryPathInfoService<DS: DirectoryService> {
db: Arc<RwLock<HashMap<[u8; 20], proto::PathInfo>>>,
blob_service: Box<dyn BlobService>,
directory_service: DS,
}
impl<DS: DirectoryService> MemoryPathInfoService<DS> {
pub fn new(blob_service: Box<dyn BlobService>, directory_service: DS) -> Self {
Self {
db: Default::default(),
blob_service,
directory_service,
}
}
}
impl<DS: DirectoryService + Clone> PathInfoService for MemoryPathInfoService<DS> {
fn get(&self, digest: [u8; 20]) -> Result<Option<proto::PathInfo>, Error> {
let db = self.db.read().unwrap();
match db.get(&digest) {
None => Ok(None),
Some(path_info) => Ok(Some(path_info.clone())),
}
}
fn put(&self, path_info: proto::PathInfo) -> Result<proto::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) => {
let mut db = self.db.write().unwrap();
db.insert(nix_path.digest, path_info.clone());
Ok(path_info)
}
}
}
fn calculate_nar(&self, root_node: &proto::node::Node) -> Result<(u64, [u8; 32]), Error> {
calculate_size_and_sha256(
root_node,
&self.blob_service,
self.directory_service.clone(),
)
.map_err(|e| Error::StorageError(e.to_string()))
}
}
|
