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use crate::chunk::DataChunk;
use crate::chunkid::ChunkId;
use crate::chunkmeta::ChunkMeta;
use crate::index::Index;
use crate::store::Store;
use std::path::Path;
/// A store for chunks and their metadata.
///
/// This combines Store and Index into one interface to make it easier
/// to handle the server side storage of chunks.
pub struct IndexedStore {
store: Store,
index: Index,
}
impl IndexedStore {
pub fn new(dirname: &Path) -> anyhow::Result<Self> {
let store = Store::new(dirname);
let index = Index::new(dirname)?;
Ok(Self { store, index })
}
pub fn save(&mut self, meta: &ChunkMeta, chunk: &DataChunk) -> anyhow::Result<ChunkId> {
let id = ChunkId::new();
self.store.save(&id, meta, chunk)?;
self.insert_meta(&id, meta)?;
Ok(id)
}
fn insert_meta(&mut self, id: &ChunkId, meta: &ChunkMeta) -> anyhow::Result<()> {
self.index.insert_meta(id.clone(), meta.clone())?;
Ok(())
}
pub fn load(&self, id: &ChunkId) -> anyhow::Result<(DataChunk, ChunkMeta)> {
Ok((self.store.load(id)?, self.load_meta(id)?))
}
pub fn load_meta(&self, id: &ChunkId) -> anyhow::Result<ChunkMeta> {
self.index.get_meta(id)
}
pub fn find_by_sha256(&self, sha256: &str) -> anyhow::Result<Vec<ChunkId>> {
self.index.find_by_sha256(sha256)
}
pub fn find_generations(&self) -> anyhow::Result<Vec<ChunkId>> {
self.index.find_generations()
}
pub fn remove(&mut self, id: &ChunkId) -> anyhow::Result<()> {
self.index.remove_meta(id).unwrap();
self.store.delete(id)?;
Ok(())
}
}
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