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