96 lines
2.1 KiB
Rust
96 lines
2.1 KiB
Rust
use async_trait::async_trait;
|
|
use serde::{Deserialize, Serialize};
|
|
use std::sync::Arc;
|
|
|
|
use crate::background::BackgroundRunner;
|
|
use crate::data::*;
|
|
use crate::table::*;
|
|
use crate::table_sharded::*;
|
|
|
|
use crate::block_ref_table::*;
|
|
|
|
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
|
|
pub struct Version {
|
|
// Primary key
|
|
pub uuid: UUID,
|
|
|
|
// Actual data: the blocks for this version
|
|
pub deleted: bool,
|
|
pub blocks: Vec<VersionBlock>,
|
|
|
|
// Back link to bucket+key so that we can figure if
|
|
// this was deleted later on
|
|
pub bucket: String,
|
|
pub key: String,
|
|
}
|
|
|
|
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
|
|
pub struct VersionBlock {
|
|
pub offset: u64,
|
|
pub hash: Hash,
|
|
}
|
|
|
|
impl Entry<Hash, EmptyKey> for Version {
|
|
fn partition_key(&self) -> &Hash {
|
|
&self.uuid
|
|
}
|
|
fn sort_key(&self) -> &EmptyKey {
|
|
&EmptyKey
|
|
}
|
|
|
|
fn merge(&mut self, other: &Self) {
|
|
if other.deleted {
|
|
self.deleted = true;
|
|
self.blocks.clear();
|
|
} else if !self.deleted {
|
|
for bi in other.blocks.iter() {
|
|
match self.blocks.binary_search_by(|x| x.offset.cmp(&bi.offset)) {
|
|
Ok(_) => (),
|
|
Err(pos) => {
|
|
self.blocks.insert(pos, bi.clone());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct VersionTable {
|
|
pub background: Arc<BackgroundRunner>,
|
|
pub block_ref_table: Arc<Table<BlockRefTable, TableShardedReplication>>,
|
|
}
|
|
|
|
#[async_trait]
|
|
impl TableSchema for VersionTable {
|
|
type P = Hash;
|
|
type S = EmptyKey;
|
|
type E = Version;
|
|
type Filter = ();
|
|
|
|
async fn updated(&self, old: Option<Self::E>, new: Option<Self::E>) {
|
|
let block_ref_table = self.block_ref_table.clone();
|
|
if let (Some(old_v), Some(new_v)) = (old, new) {
|
|
// Propagate deletion of version blocks
|
|
self.background.spawn(async move {
|
|
if new_v.deleted && !old_v.deleted {
|
|
let deleted_block_refs = old_v
|
|
.blocks
|
|
.iter()
|
|
.map(|vb| BlockRef {
|
|
block: vb.hash.clone(),
|
|
version: old_v.uuid.clone(),
|
|
deleted: true,
|
|
})
|
|
.collect::<Vec<_>>();
|
|
block_ref_table.insert_many(&deleted_block_refs[..]).await?;
|
|
}
|
|
Ok(())
|
|
});
|
|
}
|
|
}
|
|
|
|
fn matches_filter(entry: &Self::E, _filter: &Self::Filter) -> bool {
|
|
!entry.deleted
|
|
}
|
|
}
|