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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| use std::sync::Arc; | ||
|
|
||
| use async_trait::async_trait; | ||
| use draco_interfaces::{ | ||
| Blake3Hash, Blake3Tree, BlockStoreInterface, CompressionAlgoSet, CompressionAlgorithm, | ||
| ConfigConsumer, ContentChunk, | ||
| }; | ||
| use serde::{Deserialize, Serialize}; | ||
| use tempdir::TempDir; | ||
| use tokio::{ | ||
| fs::{self, File}, | ||
| io::AsyncWriteExt, | ||
| }; | ||
|
|
||
| use crate::{put::IncrementalPut, store::Store, Block, BlockContent, Key}; | ||
|
|
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| const TMP_DIR_PREFIX: &str = "tmp-store"; | ||
|
|
||
| #[derive(Serialize, Deserialize, Default)] | ||
| pub struct FsStoreConfig { | ||
| store_dir_path: String, | ||
| } | ||
|
|
||
| #[derive(Clone)] | ||
| pub struct FsStore { | ||
| store_dir_path: String, | ||
| tmp_dir: Arc<TempDir>, | ||
| } | ||
|
|
||
| impl ConfigConsumer for FsStore { | ||
| const KEY: &'static str = "fsstore"; | ||
| type Config = FsStoreConfig; | ||
| } | ||
|
|
||
| #[async_trait] | ||
| impl BlockStoreInterface for FsStore { | ||
| type SharedPointer<T: ?Sized + Send + Sync> = Arc<T>; | ||
| type Put = IncrementalPut<Self>; | ||
|
|
||
| async fn init(config: Self::Config) -> anyhow::Result<Self> { | ||
| Ok(Self { | ||
| store_dir_path: config.store_dir_path, | ||
| tmp_dir: TempDir::new(TMP_DIR_PREFIX).map(Arc::new)?, | ||
| }) | ||
| } | ||
|
|
||
| async fn get_tree(&self, cid: &Blake3Hash) -> Option<Self::SharedPointer<Blake3Tree>> { | ||
| match bincode::deserialize::<BlockContent>( | ||
| self.fetch(&Key::tree_key(*cid)).await?.as_slice(), | ||
| ) | ||
| .expect("Stored content to be serialized properly") | ||
| { | ||
| BlockContent::Tree(tree) => Some(Arc::new(Blake3Tree(tree))), | ||
| _ => None, | ||
| } | ||
| } | ||
|
|
||
| async fn get( | ||
| &self, | ||
| block_counter: u32, | ||
| block_hash: &Blake3Hash, | ||
| _compression: CompressionAlgoSet, | ||
| ) -> Option<Self::SharedPointer<ContentChunk>> { | ||
| match bincode::deserialize::<BlockContent>( | ||
| self.fetch(&Key::chunk_key(*block_hash, block_counter)) | ||
| .await? | ||
| .as_slice(), | ||
| ) | ||
| .expect("Stored content to be serialized properly") | ||
| { | ||
| BlockContent::Chunk(content) => Some(Arc::new(ContentChunk { | ||
| compression: CompressionAlgorithm::Uncompressed, | ||
| content, | ||
| })), | ||
| _ => None, | ||
| } | ||
| } | ||
|
|
||
| fn put(&self, root: Option<Blake3Hash>) -> Self::Put { | ||
| match root { | ||
| Some(root) => IncrementalPut::verifier(self.clone(), root), | ||
| None => IncrementalPut::trust(self.clone()), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // TODO: Add logging. | ||
| #[async_trait] | ||
| impl Store for FsStore { | ||
| async fn fetch(&self, key: &Key) -> Option<Block> { | ||
| let path = format!("{}/{:?}", self.store_dir_path, key.0); | ||
| fs::read(path).await.ok() | ||
| } | ||
|
|
||
| // TODO: This should perhaps return an error. | ||
| async fn insert(&mut self, key: Key, block: Block) { | ||
| let filename = format!("{:?}", key.0); | ||
| let path = self.tmp_dir.path().join(filename); | ||
| if let Ok(mut tmp_file) = File::create(&path).await { | ||
| if tmp_file.write_all(block.as_ref()).await.is_err() { | ||
| return; | ||
| } | ||
| // TODO: Is this needed before calling rename? | ||
| if tmp_file.sync_all().await.is_err() { | ||
| return; | ||
| } | ||
| let store_path = format!("{}/{:?}", self.store_dir_path, key.0); | ||
| if fs::rename(path, store_path).await.is_err() { | ||
| return; | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,5 @@ | ||
| pub mod config; | ||
| mod fs; | ||
| pub mod memory; | ||
| pub mod put; | ||
| mod store; | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,7 +1,10 @@ | ||
| use async_trait::async_trait; | ||
|
|
||
| use crate::{Block, Key}; | ||
|
|
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| /// Basic get and put store trait. | ||
| /// Simple block store interface. | ||
| #[async_trait] | ||
| pub trait Store { | ||
| fn store_get(&self, key: &Key) -> Option<Block>; | ||
| fn store_put(&mut self, key: Key, block: Block); | ||
| async fn fetch(&self, key: &Key) -> Option<Block>; | ||
| async fn insert(&mut self, key: Key, block: Block); | ||
| } |