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make blockchain functions more idiomatic, avoid needless writes to cache_man (#8054)

This commit is contained in:
Marek Kotewicz 2018-03-06 19:44:05 +01:00 committed by André Silva
parent ff722cac72
commit f54944bbfc
1 changed files with 52 additions and 71 deletions
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123
ethcore/src/blockchain/blockchain.rs
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@ -216,17 +216,15 @@ impl BlockProvider for BlockChain {
/// Get raw block data
fn block(&self, hash: &H256) -> Option<encoded::Block> {
match (self.block_header_data(hash), self.block_body(hash)) {
(Some(header), Some(body)) => {
let mut block = RlpStream::new_list(3);
let body_rlp = body.rlp();
block.append_raw(header.rlp().as_raw(), 1);
block.append_raw(body_rlp.at(0).as_raw(), 1);
block.append_raw(body_rlp.at(1).as_raw(), 1);
Some(encoded::Block::new(block.out()))
},
_ => None,
}
let header = self.block_header_data(hash)?;
let body = self.block_body(hash)?;
let mut block = RlpStream::new_list(3);
let body_rlp = body.rlp();
block.append_raw(header.rlp().as_raw(), 1);
block.append_raw(body_rlp.at(0).as_raw(), 1);
block.append_raw(body_rlp.at(1).as_raw(), 1);
Some(encoded::Block::new(block.out()))
}
/// Get block header data
@ -250,21 +248,15 @@ impl BlockProvider for BlockChain {
}
// Read from DB and populate cache
let opt = self.db.get(db::COL_HEADERS, hash)
.expect("Low level database error. Some issue with disk?");
let b = self.db.get(db::COL_HEADERS, hash)
.expect("Low level database error. Some issue with disk?")?;
let result = match opt {
Some(b) => {
let bytes = decompress(&b, blocks_swapper()).into_vec();
let mut write = self.block_headers.write();
write.insert(*hash, bytes.clone());
Some(encoded::Header::new(bytes))
},
None => None
};
let bytes = decompress(&b, blocks_swapper()).into_vec();
let mut write = self.block_headers.write();
write.insert(*hash, bytes.clone());
self.cache_man.lock().note_used(CacheId::BlockHeader(*hash));
result
Some(encoded::Header::new(bytes))
}
/// Get block body data
@ -286,50 +278,43 @@ impl BlockProvider for BlockChain {
}
// Read from DB and populate cache
let opt = self.db.get(db::COL_BODIES, hash)
.expect("Low level database error. Some issue with disk?");
let b = self.db.get(db::COL_BODIES, hash)
.expect("Low level database error. Some issue with disk?")?;
let result = match opt {
Some(b) => {
let bytes = decompress(&b, blocks_swapper()).into_vec();
let mut write = self.block_bodies.write();
write.insert(*hash, bytes.clone());
Some(encoded::Body::new(bytes))
},
None => None
};
let bytes = decompress(&b, blocks_swapper()).into_vec();
let mut write = self.block_bodies.write();
write.insert(*hash, bytes.clone());
self.cache_man.lock().note_used(CacheId::BlockBody(*hash));
result
Some(encoded::Body::new(bytes))
}
/// Get the familial details concerning a block.
fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_details, hash);
let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_details, hash)?;
self.cache_man.lock().note_used(CacheId::BlockDetails(*hash));
result
Some(result)
}
/// Get the hash of given block's number.
fn block_hash(&self, index: BlockNumber) -> Option<H256> {
let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_hashes, &index);
let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_hashes, &index)?;
self.cache_man.lock().note_used(CacheId::BlockHashes(index));
result
Some(result)
}
/// Get the address of transaction with given hash.
fn transaction_address(&self, hash: &H256) -> Option<TransactionAddress> {
let result = self.db.read_with_cache(db::COL_EXTRA, &self.transaction_addresses, hash);
let result = self.db.read_with_cache(db::COL_EXTRA, &self.transaction_addresses, hash)?;
self.cache_man.lock().note_used(CacheId::TransactionAddresses(*hash));
result
Some(result)
}
/// Get receipts of block with given hash.
fn block_receipts(&self, hash: &H256) -> Option<BlockReceipts> {
let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_receipts, hash);
let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_receipts, hash)?;
self.cache_man.lock().note_used(CacheId::BlockReceipts(*hash));
result
Some(result)
}
fn blocks_with_blooms(&self, blooms: &[Bloom], from_block: BlockNumber, to_block: BlockNumber) -> Vec<BlockNumber> {
@ -428,33 +413,31 @@ impl<'a> Iterator for EpochTransitionIter<'a> {
fn next(&mut self) -> Option<Self::Item> {
loop {
match self.prefix_iter.next() {
Some((key, val)) => {
// iterator may continue beyond values beginning with this
// prefix.
if !key.starts_with(&EPOCH_KEY_PREFIX[..]) { return None }
// some epochs never occurred on the main chain.
let (key, val) = self.prefix_iter.next()?;
let transitions: EpochTransitions = ::rlp::decode(&val[..]);
// iterator may continue beyond values beginning with this
// prefix.
if !key.starts_with(&EPOCH_KEY_PREFIX[..]) {
return None
}
// if there are multiple candidates, at most one will be on the
// canon chain.
for transition in transitions.candidates.into_iter() {
let is_in_canon_chain = self.chain.block_hash(transition.block_number)
.map_or(false, |hash| hash == transition.block_hash);
let transitions: EpochTransitions = ::rlp::decode(&val[..]);
// if the transition is within the block gap, there will only be
// one candidate, and it will be from a snapshot restored from.
let is_ancient = self.chain.first_block_number()
.map_or(false, |first| first > transition.block_number);
// if there are multiple candidates, at most one will be on the
// canon chain.
for transition in transitions.candidates.into_iter() {
let is_in_canon_chain = self.chain.block_hash(transition.block_number)
.map_or(false, |hash| hash == transition.block_hash);
if is_ancient || is_in_canon_chain {
return Some((transitions.number, transition))
}
}
// if the transition is within the block gap, there will only be
// one candidate, and it will be from a snapshot restored from.
let is_ancient = self.chain.first_block_number()
.map_or(false, |first| first > transition.block_number);
// some epochs never occurred on the main chain.
if is_ancient || is_in_canon_chain {
return Some((transitions.number, transition))
}
None => return None,
}
}
}
@ -879,7 +862,6 @@ impl BlockChain {
let mut update = HashMap::new();
update.insert(block_hash, parent_details);
let mut write_details = self.block_details.write();
batch.extend_with_cache(db::COL_EXTRA, &mut *write_details, update, CacheUpdatePolicy::Overwrite);
@ -1072,13 +1054,12 @@ impl BlockChain {
/// Given a block's `parent`, find every block hash which represents a valid possible uncle.
pub fn find_uncle_hashes(&self, parent: &H256, uncle_generations: usize) -> Option<Vec<H256>> {
if !self.is_known(parent) { return None; }
if !self.is_known(parent) {
return None;
}
let mut excluded = HashSet::new();
let ancestry = match self.ancestry_iter(parent.clone()) {
Some(iter) => iter,
None => return None,
};
let ancestry = self.ancestry_iter(parent.clone())?;
for a in ancestry.clone().take(uncle_generations) {
if let Some(uncles) = self.uncle_hashes(&a) {