303 lines
11 KiB
Python
303 lines
11 KiB
Python
# Author: Nic Wolfe <nic@wolfeden.ca>
|
|
# URL: http://code.google.com/p/sickbeard/
|
|
#
|
|
# This file is part of SickRage.
|
|
#
|
|
# SickRage is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# SickRage is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with SickRage. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from __future__ import with_statement
|
|
|
|
import os.path
|
|
import re
|
|
import sqlite3
|
|
import time
|
|
import threading
|
|
|
|
import sickbeard
|
|
|
|
from sickbeard import encodingKludge as ek
|
|
from sickbeard import logger
|
|
from sickbeard.exceptions import ex
|
|
from sickbeard.common import cpu_presets
|
|
|
|
db_lock = threading.Lock()
|
|
|
|
|
|
def dbFilename(filename="sickbeard.db", suffix=None):
|
|
"""
|
|
@param filename: The sqlite database filename to use. If not specified,
|
|
will be made to be sickbeard.db
|
|
@param suffix: The suffix to append to the filename. A '.' will be added
|
|
automatically, i.e. suffix='v0' will make dbfile.db.v0
|
|
@return: the correct location of the database file.
|
|
"""
|
|
if suffix:
|
|
filename = "%s.%s" % (filename, suffix)
|
|
return ek.ek(os.path.join, sickbeard.DATA_DIR, filename)
|
|
|
|
|
|
class DBConnection:
|
|
def __init__(self, filename="sickbeard.db", suffix=None, row_type=None):
|
|
|
|
self.filename = filename
|
|
self.connection = sqlite3.connect(dbFilename(filename), 20)
|
|
if row_type == "dict":
|
|
self.connection.row_factory = self._dict_factory
|
|
else:
|
|
self.connection.row_factory = sqlite3.Row
|
|
|
|
def checkDBVersion(self):
|
|
result = None
|
|
|
|
try:
|
|
result = self.select("SELECT db_version FROM db_version")
|
|
except sqlite3.OperationalError, e:
|
|
if "no such table: db_version" in e.args[0]:
|
|
return 0
|
|
|
|
if result:
|
|
return int(result[0]["db_version"])
|
|
else:
|
|
return 0
|
|
|
|
def fetch(self, query, args=None):
|
|
|
|
with db_lock:
|
|
|
|
if query == None:
|
|
return
|
|
|
|
sqlResult = None
|
|
attempt = 0
|
|
|
|
while attempt < 5:
|
|
try:
|
|
if args == None:
|
|
logger.log(self.filename + ": " + query, logger.DB)
|
|
cursor = self.connection.cursor()
|
|
cursor.execute(query)
|
|
sqlResult = cursor.fetchone()[0]
|
|
else:
|
|
logger.log(self.filename + ": " + query + " with args " + str(args), logger.DB)
|
|
cursor = self.connection.cursor()
|
|
cursor.execute(query, args)
|
|
sqlResult = cursor.fetchone()[0]
|
|
|
|
# get out of the connection attempt loop since we were successful
|
|
break
|
|
except sqlite3.OperationalError, e:
|
|
if "unable to open database file" in e.args[0] or "database is locked" in e.args[0]:
|
|
logger.log(u"DB error: " + ex(e), logger.WARNING)
|
|
attempt += 1
|
|
time.sleep(cpu_presets[sickbeard.CPU_PRESET])
|
|
else:
|
|
logger.log(u"DB error: " + ex(e), logger.ERROR)
|
|
raise
|
|
except sqlite3.DatabaseError, e:
|
|
logger.log(u"Fatal error executing query: " + ex(e), logger.ERROR)
|
|
raise
|
|
|
|
return sqlResult
|
|
|
|
def mass_action(self, querylist, logTransaction=False):
|
|
|
|
with db_lock:
|
|
|
|
if querylist == None:
|
|
return
|
|
|
|
sqlResult = []
|
|
attempt = 0
|
|
|
|
while attempt < 5:
|
|
try:
|
|
for qu in querylist:
|
|
if len(qu) == 1:
|
|
if logTransaction:
|
|
logger.log(qu[0], logger.DEBUG)
|
|
sqlResult.append(self.connection.execute(qu[0]))
|
|
elif len(qu) > 1:
|
|
if logTransaction:
|
|
logger.log(qu[0] + " with args " + str(qu[1]), logger.DEBUG)
|
|
sqlResult.append(self.connection.execute(qu[0], qu[1]))
|
|
self.connection.commit()
|
|
logger.log(u"Transaction with " + str(len(querylist)) + u" queries executed", logger.DEBUG)
|
|
return sqlResult
|
|
except sqlite3.OperationalError, e:
|
|
sqlResult = []
|
|
if self.connection:
|
|
self.connection.rollback()
|
|
if "unable to open database file" in e.args[0] or "database is locked" in e.args[0]:
|
|
logger.log(u"DB error: " + ex(e), logger.WARNING)
|
|
attempt += 1
|
|
time.sleep(cpu_presets[sickbeard.CPU_PRESET])
|
|
else:
|
|
logger.log(u"DB error: " + ex(e), logger.ERROR)
|
|
raise
|
|
except sqlite3.DatabaseError, e:
|
|
sqlResult = []
|
|
if self.connection:
|
|
self.connection.rollback()
|
|
logger.log(u"Fatal error executing query: " + ex(e), logger.ERROR)
|
|
raise
|
|
|
|
return sqlResult
|
|
|
|
def action(self, query, args=None):
|
|
|
|
with db_lock:
|
|
|
|
if query == None:
|
|
return
|
|
|
|
sqlResult = None
|
|
attempt = 0
|
|
|
|
while attempt < 5:
|
|
try:
|
|
if args == None:
|
|
logger.log(self.filename + ": " + query, logger.DB)
|
|
sqlResult = self.connection.execute(query)
|
|
else:
|
|
logger.log(self.filename + ": " + query + " with args " + str(args), logger.DB)
|
|
sqlResult = self.connection.execute(query, args)
|
|
self.connection.commit()
|
|
# get out of the connection attempt loop since we were successful
|
|
break
|
|
except sqlite3.OperationalError, e:
|
|
if "unable to open database file" in e.args[0] or "database is locked" in e.args[0]:
|
|
logger.log(u"DB error: " + ex(e), logger.WARNING)
|
|
attempt += 1
|
|
time.sleep(cpu_presets[sickbeard.CPU_PRESET])
|
|
else:
|
|
logger.log(u"DB error: " + ex(e), logger.ERROR)
|
|
raise
|
|
except sqlite3.DatabaseError, e:
|
|
logger.log(u"Fatal error executing query: " + ex(e), logger.ERROR)
|
|
raise
|
|
|
|
return sqlResult
|
|
|
|
|
|
def select(self, query, args=None):
|
|
|
|
sqlResults = self.action(query, args).fetchall()
|
|
|
|
if sqlResults == None:
|
|
return []
|
|
|
|
return sqlResults
|
|
|
|
def upsert(self, tableName, valueDict, keyDict):
|
|
|
|
changesBefore = self.connection.total_changes
|
|
|
|
genParams = lambda myDict: [x + " = ?" for x in myDict.keys()]
|
|
|
|
query = "UPDATE " + tableName + " SET " + ", ".join(genParams(valueDict)) + " WHERE " + " AND ".join(
|
|
genParams(keyDict))
|
|
|
|
self.action(query, valueDict.values() + keyDict.values())
|
|
|
|
if self.connection.total_changes == changesBefore:
|
|
query = "INSERT INTO " + tableName + " (" + ", ".join(valueDict.keys() + keyDict.keys()) + ")" + \
|
|
" VALUES (" + ", ".join(["?"] * len(valueDict.keys() + keyDict.keys())) + ")"
|
|
self.action(query, valueDict.values() + keyDict.values())
|
|
|
|
def tableInfo(self, tableName):
|
|
# FIXME ? binding is not supported here, but I cannot find a way to escape a string manually
|
|
cursor = self.connection.execute("PRAGMA table_info(%s)" % tableName)
|
|
columns = {}
|
|
for column in cursor:
|
|
columns[column['name']] = {'type': column['type']}
|
|
return columns
|
|
|
|
# http://stackoverflow.com/questions/3300464/how-can-i-get-dict-from-sqlite-query
|
|
def _dict_factory(self, cursor, row):
|
|
d = {}
|
|
for idx, col in enumerate(cursor.description):
|
|
d[col[0]] = row[idx]
|
|
return d
|
|
|
|
|
|
def sanityCheckDatabase(connection, sanity_check):
|
|
sanity_check(connection).check()
|
|
|
|
|
|
class DBSanityCheck(object):
|
|
def __init__(self, connection):
|
|
self.connection = connection
|
|
|
|
def check(self):
|
|
pass
|
|
|
|
|
|
# ===============
|
|
# = Upgrade API =
|
|
# ===============
|
|
|
|
def upgradeDatabase(connection, schema):
|
|
logger.log(u"Checking database structure...", logger.MESSAGE)
|
|
_processUpgrade(connection, schema)
|
|
|
|
|
|
def prettyName(class_name):
|
|
return ' '.join([x.group() for x in re.finditer("([A-Z])([a-z0-9]+)", class_name)])
|
|
|
|
|
|
def _processUpgrade(connection, upgradeClass):
|
|
instance = upgradeClass(connection)
|
|
logger.log(u"Checking " + prettyName(upgradeClass.__name__) + " database upgrade", logger.DEBUG)
|
|
if not instance.test():
|
|
logger.log(u"Database upgrade required: " + prettyName(upgradeClass.__name__), logger.MESSAGE)
|
|
try:
|
|
instance.execute()
|
|
except sqlite3.DatabaseError, e:
|
|
print "Error in " + str(upgradeClass.__name__) + ": " + ex(e)
|
|
raise
|
|
logger.log(upgradeClass.__name__ + " upgrade completed", logger.DEBUG)
|
|
else:
|
|
logger.log(upgradeClass.__name__ + " upgrade not required", logger.DEBUG)
|
|
|
|
for upgradeSubClass in upgradeClass.__subclasses__():
|
|
_processUpgrade(connection, upgradeSubClass)
|
|
|
|
|
|
# Base migration class. All future DB changes should be subclassed from this class
|
|
class SchemaUpgrade(object):
|
|
def __init__(self, connection):
|
|
self.connection = connection
|
|
|
|
def hasTable(self, tableName):
|
|
return len(self.connection.action("SELECT 1 FROM sqlite_master WHERE name = ?;", (tableName, )).fetchall()) > 0
|
|
|
|
def hasColumn(self, tableName, column):
|
|
return column in self.connection.tableInfo(tableName)
|
|
|
|
def addColumn(self, table, column, type="NUMERIC", default=0):
|
|
self.connection.action("ALTER TABLE %s ADD %s %s" % (table, column, type))
|
|
self.connection.action("UPDATE %s SET %s = ?" % (table, column), (default,))
|
|
|
|
def checkDBVersion(self):
|
|
result = self.connection.select("SELECT db_version FROM db_version")
|
|
if result:
|
|
return int(result[0]["db_version"])
|
|
else:
|
|
return 0
|
|
|
|
def incDBVersion(self):
|
|
new_version = self.checkDBVersion() + 1
|
|
self.connection.action("UPDATE db_version SET db_version = ?", [new_version])
|
|
return new_version
|