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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 {
db: Arc<RwLock<HashMap<[u8; 20], proto::PathInfo>>>,
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
}
impl MemoryPathInfoService {
pub fn new(
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
) -> Self {
Self {
db: Default::default(),
blob_service,
directory_service,
}
}
}
impl PathInfoService for MemoryPathInfoService {
/// Constructs a [MemoryPathInfoService] from the passed [url::Url]:
/// - scheme has to be `memory://`
/// - there may not be a host.
/// - there may not be a path.
fn from_url(
url: &url::Url,
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
) -> Result<Self, Error> {
if url.scheme() != "memory" {
return Err(crate::Error::StorageError("invalid scheme".to_string()));
}
if url.has_host() || !url.path().is_empty() {
return Err(crate::Error::StorageError("invalid url".to_string()));
}
Ok(Self::new(blob_service, directory_service))
}
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.clone(),
self.directory_service.clone(),
)
.map_err(|e| Error::StorageError(e.to_string()))
}
fn list(&self) -> Box<dyn Iterator<Item = Result<proto::PathInfo, Error>> + Send + '_> {
let db = self.db.read().unwrap();
// Copy all elements into a list.
// This is a bit ugly, because we can't have db escape the lifetime
// of this function, but elements need to be returned owned anyways, and this in-
// memory impl is only for testing purposes anyways.
let items: Vec<_> = db.iter().map(|(_k, v)| Ok(v.clone())).collect();
Box::new(items.into_iter())
}
}
#[cfg(test)]
mod tests {
use crate::tests::utils::gen_blob_service;
use crate::tests::utils::gen_directory_service;
use super::MemoryPathInfoService;
use super::PathInfoService;
/// This uses a wrong scheme.
#[test]
fn test_invalid_scheme() {
let url = url::Url::parse("http://foo.example/test").expect("must parse");
assert!(
MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service())
.is_err()
);
}
/// This correctly sets the scheme, and doesn't set a path.
#[test]
fn test_valid_scheme() {
let url = url::Url::parse("memory://").expect("must parse");
assert!(
MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service())
.is_ok()
);
}
/// This sets the host to `foo`
#[test]
fn test_invalid_host() {
let url = url::Url::parse("memory://foo").expect("must parse");
assert!(
MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service())
.is_err()
);
}
/// This has the path "/", which is invalid.
#[test]
fn test_invalid_has_path() {
let url = url::Url::parse("memory:///").expect("must parse");
assert!(
MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service())
.is_err()
);
}
/// This has the path "/foo", which is invalid.
#[test]
fn test_invalid_path2() {
let url = url::Url::parse("memory:///foo").expect("must parse");
assert!(
MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service())
.is_err()
);
}
}
|
