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cache cache histories from the db for mempool updates

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Jack Robison 2022-04-12 15:27:28 -04:00
parent cb5f396b33
commit ca1444eb5d
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GPG key ID: DF25C68FE0239BB2
1 changed files with 25 additions and 8 deletions
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31
scribe/blockchain/service.py
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@ -11,7 +11,7 @@ from scribe import PROMETHEUS_NAMESPACE
from scribe.db.prefixes import ACTIVATED_SUPPORT_TXO_TYPE, ACTIVATED_CLAIM_TXO_TYPE
from scribe.db.prefixes import PendingActivationKey, PendingActivationValue, ClaimToTXOValue
from scribe.error.base import ChainError
from scribe.common import hash_to_hex_str, hash160, RPCError, HISTOGRAM_BUCKETS, StagedClaimtrieItem, sha256
from scribe.common import hash_to_hex_str, hash160, RPCError, HISTOGRAM_BUCKETS, StagedClaimtrieItem, sha256, LRUCache
from scribe.blockchain.daemon import LBCDaemon
from scribe.blockchain.transaction import Tx, TxOutput, TxInput, Block
from scribe.blockchain.prefetcher import Prefetcher
@ -125,6 +125,9 @@ class BlockchainProcessorService(BlockchainService):
self.pending_transaction_num_mapping: Dict[bytes, int] = {}
self.pending_transactions: Dict[int, bytes] = {}
self.hashX_history_cache = LRUCache(100)
self.hashX_full_cache = LRUCache(100)
async def run_in_thread_with_lock(self, func, *args):
# Run in a thread to prevent blocking. Shielded so that
# cancellations from shutdown don't lose work - when the task
@ -1244,14 +1247,30 @@ class BlockchainProcessorService(BlockchainService):
self.touched_claims_to_send_es.difference_update(self.removed_claim_hashes)
self.removed_claims_to_send_es.update(self.removed_claim_hashes)
def _get_cached_hashX_history(self, hashX: bytes) -> str:
if hashX in self.hashX_full_cache:
return self.hashX_full_cache[hashX]
if hashX not in self.hashX_history_cache:
self.hashX_history_cache[hashX] = tx_nums = self.db.read_history(hashX, limit=None)
else:
tx_nums = self.hashX_history_cache[hashX]
history = ''
for tx_num in tx_nums:
history += f'{hash_to_hex_str(self.db.get_tx_hash(tx_num))}:{bisect_right(self.db.tx_counts, tx_num):d}:'
self.hashX_full_cache[hashX] = history
return history
def _get_update_hashX_status_ops(self, hashX: bytes, new_history: List[Tuple[bytes, int]]):
existing = self.db.prefix_db.hashX_status.get(hashX)
if existing:
self.db.prefix_db.hashX_status.stage_delete((hashX,), existing)
if hashX not in self.hashX_history_cache:
tx_nums = self.db.read_history(hashX, limit=None)
else:
tx_nums = self.hashX_history_cache[hashX]
history = ''
for tx_num in tx_nums:
history += f'{hash_to_hex_str(self.db.get_tx_hash(tx_num) )}:{bisect_right(self.db.tx_counts, tx_num):d}:'
history += f'{hash_to_hex_str(self.db.get_tx_hash(tx_num))}:{bisect_right(self.db.tx_counts, tx_num):d}:'
for tx_hash, height in new_history:
history += f'{hash_to_hex_str(tx_hash)}:{height:d}:'
if history:
@ -1262,11 +1281,7 @@ class BlockchainProcessorService(BlockchainService):
existing = self.db.prefix_db.hashX_mempool_status.get(hashX)
if existing:
self.db.prefix_db.hashX_mempool_status.stage_delete((hashX,), existing)
tx_nums = self.db.read_history(hashX, limit=None)
history = ''
for tx_num in tx_nums:
history += f'{hash_to_hex_str(self.db.get_tx_hash(tx_num) )}:{bisect_right(self.db.tx_counts, tx_num):d}:'
history += self.mempool.mempool_history(hashX)
history = self._get_cached_hashX_history(hashX) + self.mempool.mempool_history(hashX)
if history:
status = sha256(history.encode())
self.db.prefix_db.hashX_mempool_status.stage_put((hashX,), (status,))
@ -1463,6 +1478,8 @@ class BlockchainProcessorService(BlockchainService):
self.pending_support_amount_change.clear()
self.touched_hashXs.clear()
self.mempool.clear()
self.hashX_history_cache.clear()
self.hashX_full_cache.clear()
def backup_block(self):
assert len(self.db.prefix_db._op_stack) == 0