use crate::directoryservice::DirectoryPutter; use crate::proto::Directory; use crate::{proto, B3Digest, Error}; use prost::Message; use std::path::PathBuf; use tracing::{instrument, warn}; use super::utils::SimplePutter; use super::{DirectoryService, DirectoryTraverser}; #[derive(Clone)] pub struct SledDirectoryService { db: sled::Db, } impl SledDirectoryService { pub fn new(p: PathBuf) -> Result { let config = sled::Config::default().use_compression(true).path(p); let db = config.open()?; Ok(Self { db }) } pub fn new_temporary() -> Result { let config = sled::Config::default().temporary(true); let db = config.open()?; Ok(Self { db }) } } impl DirectoryService for SledDirectoryService { #[instrument(skip(self, digest), fields(directory.digest = %digest))] fn get(&self, digest: &B3Digest) -> Result, Error> { match self.db.get(digest.to_vec()) { // The directory was not found, return Ok(None) => Ok(None), // The directory was found, try to parse the data as Directory message Ok(Some(data)) => match Directory::decode(&*data) { Ok(directory) => { // Validate the retrieved Directory indeed has the // digest we expect it to have, to detect corruptions. let actual_digest = directory.digest(); if actual_digest != *digest { return Err(Error::StorageError(format!( "requested directory with digest {}, but got {}", digest, actual_digest ))); } // Validate the Directory itself is valid. if let Err(e) = directory.validate() { warn!("directory failed validation: {}", e.to_string()); return Err(Error::StorageError(format!( "directory {} failed validation: {}", actual_digest, e, ))); } Ok(Some(directory)) } Err(e) => { warn!("unable to parse directory {}: {}", digest, e); Err(Error::StorageError(e.to_string())) } }, // some storage error? Err(e) => Err(Error::StorageError(e.to_string())), } } #[instrument(skip(self, directory), fields(directory.digest = %directory.digest()))] fn put(&self, directory: proto::Directory) -> Result { let digest = directory.digest(); // validate the directory itself. if let Err(e) = directory.validate() { return Err(Error::InvalidRequest(format!( "directory {} failed validation: {}", digest, e, ))); } // store it let result = self.db.insert(digest.to_vec(), directory.encode_to_vec()); if let Err(e) = result { return Err(Error::StorageError(e.to_string())); } Ok(digest) } #[instrument(skip_all, fields(directory.digest = %root_directory_digest))] fn get_recursive( &self, root_directory_digest: &B3Digest, ) -> Box<(dyn Iterator> + std::marker::Send + 'static)> { Box::new(DirectoryTraverser::with( self.clone(), root_directory_digest, )) } #[instrument(skip_all)] fn put_multiple_start(&self) -> Box<(dyn DirectoryPutter + 'static)> where Self: Clone, { Box::new(SimplePutter::new(self.clone())) } }