1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
use data_encoding::BASE64;
use std::{
collections::HashMap,
sync::{Arc, RwLock},
};
use tracing::instrument;
use crate::Error;
use super::ChunkService;
#[derive(Clone, Default)]
pub struct MemoryChunkService {
db: Arc<RwLock<HashMap<Vec<u8>, Vec<u8>>>>,
}
impl ChunkService for MemoryChunkService {
#[instrument(skip(self, digest), fields(chunk.digest=BASE64.encode(digest)))]
fn has(&self, digest: &[u8]) -> Result<bool, Error> {
let db = self.db.read().unwrap();
Ok(db.get(digest).is_some())
}
#[instrument(skip(self), fields(chunk.digest=BASE64.encode(digest)))]
fn get(&self, digest: &[u8]) -> Result<Option<Vec<u8>>, Error> {
let db = self.db.read().unwrap();
match db.get(digest) {
None => Ok(None),
Some(data) => {
// calculate the hash to verify this is really what we expect
let actual_digest = blake3::hash(data).as_bytes().to_vec();
if actual_digest != digest {
return Err(Error::StorageError(format!(
"invalid hash encountered when reading chunk, expected {}, got {}",
BASE64.encode(digest),
BASE64.encode(&actual_digest),
)));
}
Ok(Some(data.clone()))
}
}
}
#[instrument(skip(self, data))]
fn put(&self, data: Vec<u8>) -> Result<Vec<u8>, Error> {
let digest = blake3::hash(&data).as_bytes().to_vec();
let mut db = self.db.write().unwrap();
db.insert(digest.clone(), data);
Ok(digest)
}
}
|
