63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
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use std::{
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collections::HashMap,
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sync::{Arc, RwLock},
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};
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use crate::{proto, Error};
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use nix_compat::store_path::DIGEST_SIZE;
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use super::PathInfoService;
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pub struct MemoryPathInfoService {
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db: Arc<RwLock<HashMap<Vec<u8>, proto::PathInfo>>>,
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}
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impl MemoryPathInfoService {
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pub fn new() -> Self {
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let db = Arc::new(RwLock::new(HashMap::default()));
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Self { db }
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}
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}
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impl PathInfoService for MemoryPathInfoService {
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fn get(
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&self,
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by_what: proto::get_path_info_request::ByWhat,
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) -> Result<Option<proto::PathInfo>, Error> {
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match by_what {
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proto::get_path_info_request::ByWhat::ByOutputHash(digest) => {
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if digest.len() != DIGEST_SIZE {
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return Err(Error::InvalidRequest("invalid digest length".to_string()));
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}
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let db = self.db.read().unwrap();
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match db.get(&digest) {
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None => Ok(None),
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Some(path_info) => Ok(Some(path_info.clone())),
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}
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}
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}
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}
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fn put(&self, path_info: proto::PathInfo) -> Result<proto::PathInfo, Error> {
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// Call validate on the received PathInfo message.
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match path_info.validate() {
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Err(e) => Err(Error::InvalidRequest(format!(
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"failed to validate PathInfo: {}",
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e
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))),
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// In case the PathInfo is valid, and we were able to extract a NixPath, store it in the database.
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// This overwrites existing PathInfo objects.
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Ok(nix_path) => {
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let mut db = self.db.write().unwrap();
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db.insert(nix_path.digest.to_vec(), path_info.clone());
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Ok(path_info)
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}
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}
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}
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}
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