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sqlite quality fixes

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lakshyacis 2019-12-24 18:23:37 +05:30
parent 6fad4f5665
commit 108b231c1c
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1 changed files with 34 additions and 17 deletions
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51
src/storage/sqlite.py
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@ -1,6 +1,5 @@
"""
src/storage/sqlite.py
=========================
Sqlite Inventory
"""
import sqlite3
import time
@ -10,7 +9,7 @@ from helper_sql import sqlQuery, SqlBulkExecute, sqlExecute
from storage import InventoryStorage, InventoryItem
class SqliteInventory(InventoryStorage): # pylint: disable=too-many-ancestors
class SqliteInventory(InventoryStorage): # pylint: disable=too-many-ancestors
"""Inventory using SQLite"""
def __init__(self):
super(SqliteInventory, self).__init__()
@ -20,9 +19,11 @@ class SqliteInventory(InventoryStorage): # pylint: disable=too-many-ancestors
# cache for existing objects, used for quick lookups if we have an object.
# This is used for example whenever we receive an inv message from a peer
# to check to see what items are new to us.
# We don't delete things out of it; instead, the singleCleaner thread clears and refills it.
# We don't delete things out of it; instead,
# the singleCleaner thread clears and refills it.
self._objects = {}
# Guarantees that two receiveDataThreads don't receive and process the same message concurrently
# Guarantees that two receiveDataThreads don't receive
# and process the same message concurrently
# (probably sent by a malicious individual)
self.lock = RLock()
@ -30,7 +31,9 @@ class SqliteInventory(InventoryStorage): # pylint: disable=too-many-ancestors
with self.lock:
if hash_ in self._objects:
return True
rows = sqlQuery('SELECT streamnumber FROM inventory WHERE hash=?', sqlite3.Binary(hash_))
rows = sqlQuery(
'SELECT streamnumber FROM inventory WHERE hash=?',
sqlite3.Binary(hash_))
if not rows:
return False
self._objects[hash_] = rows[0][0]
@ -41,8 +44,8 @@ class SqliteInventory(InventoryStorage): # pylint: disable=too-many-ancestors
if hash_ in self._inventory:
return self._inventory[hash_]
rows = sqlQuery(
'SELECT objecttype, streamnumber, payload, expirestime, tag FROM inventory WHERE hash=?',
sqlite3.Binary(hash_))
'SELECT objecttype, streamnumber, payload, expirestime, tag'
' FROM inventory WHERE hash=?', sqlite3.Binary(hash_))
if not rows:
raise KeyError(hash_)
return InventoryItem(*rows[0])
@ -64,35 +67,49 @@ class SqliteInventory(InventoryStorage): # pylint: disable=too-many-ancestors
def __len__(self):
with self.lock:
return len(self._inventory) + sqlQuery('SELECT count(*) FROM inventory')[0][0]
return len(self._inventory) + sqlQuery(
'SELECT count(*) FROM inventory')[0][0]
def by_type_and_tag(self, objectType, tag):
"""Return objects filtered by object type and tag"""
with self.lock:
values = [value for value in self._inventory.values() if value.type == objectType and value.tag == tag]
values = [value for value in self._inventory.values()
if value.type == objectType and value.tag == tag]
values += (InventoryItem(*value) for value in sqlQuery(
'SELECT objecttype, streamnumber, payload, expirestime, tag \
FROM inventory WHERE objecttype=? AND tag=?', objectType, sqlite3.Binary(tag)))
'SELECT objecttype, streamnumber, payload, expirestime, tag'
' FROM inventory WHERE objecttype=? AND tag=?',
objectType, sqlite3.Binary(tag)))
return values
def unexpired_hashes_by_stream(self, stream):
"""Return unexpired inventory vectors filtered by stream"""
with self.lock:
t = int(time.time())
hashes = [x for x, value in self._inventory.items() if value.stream == stream and value.expires > t]
hashes = [x for x, value in self._inventory.items()
if value.stream == stream and value.expires > t]
hashes += (str(payload) for payload, in sqlQuery(
'SELECT hash FROM inventory WHERE streamnumber=? AND expirestime>?', stream, t))
'SELECT hash FROM inventory WHERE streamnumber=?'
' AND expirestime>?', stream, t))
return hashes
def flush(self):
"""Flush cache"""
with self.lock:
# If you use both the inventoryLock and the sqlLock, always use the inventoryLock OUTSIDE of the sqlLock.
# If you use both the inventoryLock and the sqlLock,
# always use the inventoryLock OUTSIDE of the sqlLock.
with SqlBulkExecute() as sql:
for objectHash, value in self._inventory.items():
sql.execute('INSERT INTO inventory VALUES (?, ?, ?, ?, ?, ?)', sqlite3.Binary(objectHash), *value)
sql.execute(
'INSERT INTO inventory VALUES (?, ?, ?, ?, ?, ?)',
sqlite3.Binary(objectHash), *value)
self._inventory.clear()
def clean(self):
"""Free memory / perform garbage collection"""
with self.lock:
sqlExecute('DELETE FROM inventory WHERE expirestime<?', int(time.time()) - (60 * 60 * 3))
sqlExecute(
'DELETE FROM inventory WHERE expirestime<?',
int(time.time()) - (60 * 60 * 3))
self._objects.clear()
for objectHash, value in self._inventory.items():
self._objects[objectHash] = value.stream