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|
use std::{
collections::HashMap,
sync::{Arc, RwLock},
};
use crate::{proto, Error};
use nix_compat::store_path::DIGEST_SIZE;
use super::PathInfoService;
pub struct MemoryPathInfoService {
db: Arc<RwLock<HashMap<Vec<u8>, proto::PathInfo>>>,
}
impl MemoryPathInfoService {
pub fn new() -> Self {
let db = Arc::new(RwLock::new(HashMap::default()));
Self { db }
}
}
impl PathInfoService for MemoryPathInfoService {
fn get(
&self,
by_what: proto::get_path_info_request::ByWhat,
) -> Result<Option<proto::PathInfo>, Error> {
match by_what {
proto::get_path_info_request::ByWhat::ByOutputHash(digest) => {
if digest.len() != DIGEST_SIZE {
return Err(Error::InvalidRequest("invalid digest length".to_string()));
}
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.to_vec(), path_info.clone());
Ok(path_info)
}
}
}
}
|
