forked from Deuxfleurs/garage
72 lines
1.7 KiB
Rust
72 lines
1.7 KiB
Rust
use serde::{Deserialize, Serialize};
|
|
use std::sync::Arc;
|
|
|
|
use garage_util::data::*;
|
|
|
|
use garage_table::crdt::CRDT;
|
|
use garage_table::*;
|
|
|
|
use crate::block::*;
|
|
|
|
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
|
|
pub struct BlockRef {
|
|
/// Hash (blake2 sum) of the block, used as partition key
|
|
pub block: Hash,
|
|
|
|
/// Id of the Version for the object containing this block, used as sorting key
|
|
pub version: UUID,
|
|
|
|
// Keep track of deleted status
|
|
/// Is the Version that contains this block deleted
|
|
pub deleted: crdt::Bool,
|
|
}
|
|
|
|
impl Entry<Hash, UUID> for BlockRef {
|
|
fn partition_key(&self) -> &Hash {
|
|
&self.block
|
|
}
|
|
fn sort_key(&self) -> &UUID {
|
|
&self.version
|
|
}
|
|
fn is_tombstone(&self) -> bool {
|
|
self.deleted.get()
|
|
}
|
|
}
|
|
|
|
impl CRDT for BlockRef {
|
|
fn merge(&mut self, other: &Self) {
|
|
self.deleted.merge(&other.deleted);
|
|
}
|
|
}
|
|
|
|
pub struct BlockRefTable {
|
|
pub block_manager: Arc<BlockManager>,
|
|
}
|
|
|
|
impl TableSchema for BlockRefTable {
|
|
type P = Hash;
|
|
type S = UUID;
|
|
type E = BlockRef;
|
|
type Filter = DeletedFilter;
|
|
|
|
fn updated(&self, old: Option<Self::E>, new: Option<Self::E>) {
|
|
let block = &old.as_ref().or(new.as_ref()).unwrap().block;
|
|
let was_before = old.as_ref().map(|x| !x.deleted.get()).unwrap_or(false);
|
|
let is_after = new.as_ref().map(|x| !x.deleted.get()).unwrap_or(false);
|
|
if is_after && !was_before {
|
|
if let Err(e) = self.block_manager.block_incref(block) {
|
|
warn!("block_incref failed for block {:?}: {}", block, e);
|
|
}
|
|
}
|
|
if was_before && !is_after {
|
|
if let Err(e) = self.block_manager.block_decref(block) {
|
|
warn!("block_decref failed for block {:?}: {}", block, e);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn matches_filter(entry: &Self::E, filter: &Self::Filter) -> bool {
|
|
filter.apply(entry.deleted.get())
|
|
}
|
|
}
|