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use std::path::PathBuf;
use data_encoding::BASE64;
use prost::Message;
use tracing::instrument;
use crate::{proto, Error};
use super::BlobService;
#[derive(Clone)]
pub struct SledBlobService {
db: sled::Db,
}
impl SledBlobService {
pub fn new(p: PathBuf) -> Result<Self, sled::Error> {
let config = sled::Config::default().use_compression(true).path(p);
let db = config.open()?;
Ok(Self { db })
}
}
impl BlobService for SledBlobService {
#[instrument(name = "SledBlobService::stat", skip(self, req), fields(blob.digest=BASE64.encode(&req.digest)))]
fn stat(&self, req: &proto::StatBlobRequest) -> Result<Option<proto::BlobMeta>, Error> {
if req.include_bao {
todo!("not implemented yet")
}
// if include_chunks is also false, the user only wants to know if the
// blob is present at all.
if !req.include_chunks {
match self.db.contains_key(&req.digest) {
Ok(false) => Ok(None),
Ok(true) => Ok(Some(proto::BlobMeta::default())),
Err(e) => Err(Error::StorageError(e.to_string())),
}
} else {
match self.db.get(&req.digest) {
Ok(None) => Ok(None),
Ok(Some(data)) => match proto::BlobMeta::decode(&*data) {
Ok(blob_meta) => Ok(Some(blob_meta)),
Err(e) => Err(Error::StorageError(format!(
"unable to parse blobmeta message for blob {}: {}",
BASE64.encode(&req.digest),
e
))),
},
Err(e) => Err(Error::StorageError(e.to_string())),
}
}
}
#[instrument(name = "SledBlobService::put", skip(self, blob_meta, blob_digest), fields(blob.digest = BASE64.encode(blob_digest)))]
fn put(&self, blob_digest: &[u8], blob_meta: proto::BlobMeta) -> Result<(), Error> {
let result = self.db.insert(blob_digest, blob_meta.encode_to_vec());
if let Err(e) = result {
return Err(Error::StorageError(e.to_string()));
}
Ok(())
// TODO: make sure all callers make sure the chunks exist.
// TODO: where should we calculate the bao?
}
}
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