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_else(|| 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()) } }