diff options
Diffstat (limited to 'src/table')
| -rw-r--r-- | src/table/data.rs | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/src/table/data.rs b/src/table/data.rs index 93da2110..cae18999 100644 --- a/src/table/data.rs +++ b/src/table/data.rs @@ -173,9 +173,8 @@ where pub(crate) fn update_entry(&self, update_bytes: &[u8]) -> Result<(), Error> { let update = self.decode_entry(update_bytes)?; - let tree_key = self.tree_key(update.partition_key(), update.sort_key()); - self.update_entry_with(&tree_key[..], |ent| match ent { + self.update_entry_with(update.partition_key(), update.sort_key(), |ent| match ent { Some(mut ent) => { ent.merge(&update); ent @@ -187,11 +186,14 @@ where pub fn update_entry_with( &self, - tree_key: &[u8], + partition_key: &F::P, + sort_key: &F::S, f: impl Fn(Option<F::E>) -> F::E, ) -> Result<Option<F::E>, Error> { + let tree_key = self.tree_key(partition_key, sort_key); + let changed = self.store.db().transaction(|mut tx| { - let (old_entry, old_bytes, new_entry) = match tx.get(&self.store, tree_key)? { + let (old_entry, old_bytes, new_entry) = match tx.get(&self.store, &tree_key)? { Some(old_bytes) => { let old_entry = self.decode_entry(&old_bytes).map_err(db::TxError::Abort)?; let new_entry = f(Some(old_entry.clone())); @@ -200,23 +202,23 @@ where None => (None, None, f(None)), }; - // Scenario 1: the value changed, so of course there is a change - let value_changed = Some(&new_entry) != old_entry.as_ref(); - + // Changed can be true in two scenarios + // Scenario 1: the actual represented value changed, + // so of course the messagepack encoding changed as well // Scenario 2: the value didn't change but due to a migration in the - // data format, the messagepack encoding changed. In this case - // we have to write the migrated value in the table and update - // the associated Merkle tree entry. + // data format, the messagepack encoding changed. In this case, + // we also have to write the migrated value in the table and update + // the associated Merkle tree entry. let new_bytes = rmp_to_vec_all_named(&new_entry) .map_err(Error::RmpEncode) .map_err(db::TxError::Abort)?; - let encoding_changed = Some(&new_bytes[..]) != old_bytes.as_ref().map(|x| &x[..]); + let changed = Some(&new_bytes[..]) != old_bytes.as_deref(); drop(old_bytes); - if value_changed || encoding_changed { - let new_bytes_hash = blake2sum(&new_bytes[..]); - tx.insert(&self.merkle_todo, tree_key, new_bytes_hash.as_slice())?; - tx.insert(&self.store, tree_key, new_bytes)?; + if changed { + let new_bytes_hash = blake2sum(&new_bytes); + tx.insert(&self.merkle_todo, &tree_key, new_bytes_hash.as_slice())?; + tx.insert(&self.store, &tree_key, new_bytes)?; self.instance .updated(&mut tx, old_entry.as_ref(), Some(&new_entry))?; @@ -242,7 +244,7 @@ where let pk_hash = Hash::try_from(&tree_key[..32]).unwrap(); let nodes = self.replication.write_nodes(&pk_hash); if nodes.first() == Some(&self.system.id) { - GcTodoEntry::new(tree_key.to_vec(), new_bytes_hash).save(&self.gc_todo)?; + GcTodoEntry::new(tree_key, new_bytes_hash).save(&self.gc_todo)?; } } @@ -258,10 +260,11 @@ where .db() .transaction(|mut tx| match tx.get(&self.store, k)? { Some(cur_v) if cur_v == v => { + let old_entry = self.decode_entry(v).map_err(db::TxError::Abort)?; + tx.remove(&self.store, k)?; tx.insert(&self.merkle_todo, k, vec![])?; - let old_entry = self.decode_entry(v).map_err(db::TxError::Abort)?; self.instance.updated(&mut tx, Some(&old_entry), None)?; Ok(true) } @@ -285,10 +288,11 @@ where .db() .transaction(|mut tx| match tx.get(&self.store, k)? { Some(cur_v) if blake2sum(&cur_v[..]) == vhash => { + let old_entry = self.decode_entry(&cur_v[..]).map_err(db::TxError::Abort)?; + tx.remove(&self.store, k)?; tx.insert(&self.merkle_todo, k, vec![])?; - let old_entry = self.decode_entry(&cur_v[..]).map_err(db::TxError::Abort)?; self.instance.updated(&mut tx, Some(&old_entry), None)?; Ok(true) } |