433c2d2318
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
122 lines
4.2 KiB
Python
122 lines
4.2 KiB
Python
# BitBake Persistent Data Store
|
|
#
|
|
# Copyright (C) 2007 Richard Purdie
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License version 2 as
|
|
# published by the Free Software Foundation.
|
|
#
|
|
# This program 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 this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
import bb, os
|
|
|
|
try:
|
|
import sqlite3
|
|
except ImportError:
|
|
try:
|
|
from pysqlite2 import dbapi2 as sqlite3
|
|
except ImportError:
|
|
bb.msg.fatal(bb.msg.domain.PersistData, "Importing sqlite3 and pysqlite2 failed, please install one of them. Python 2.5 or a 'python-pysqlite2' like package is likely to be what you need.")
|
|
|
|
sqlversion = sqlite3.sqlite_version_info
|
|
if sqlversion[0] < 3 or (sqlversion[0] == 3 and sqlversion[1] < 3):
|
|
bb.msg.fatal(bb.msg.domain.PersistData, "sqlite3 version 3.3.0 or later is required.")
|
|
|
|
class PersistData:
|
|
"""
|
|
BitBake Persistent Data Store
|
|
|
|
Used to store data in a central location such that other threads/tasks can
|
|
access them at some future date.
|
|
|
|
The "domain" is used as a key to isolate each data pool and in this
|
|
implementation corresponds to an SQL table. The SQL table consists of a
|
|
simple key and value pair.
|
|
|
|
Why sqlite? It handles all the locking issues for us.
|
|
"""
|
|
def __init__(self, d):
|
|
self.cachedir = bb.data.getVar("PERSISTENT_DIR", d, True) or bb.data.getVar("CACHE", d, True)
|
|
if self.cachedir in [None, '']:
|
|
bb.msg.fatal(bb.msg.domain.PersistData, "Please set the 'PERSISTENT_DIR' or 'CACHE' variable.")
|
|
try:
|
|
os.stat(self.cachedir)
|
|
except OSError:
|
|
bb.mkdirhier(self.cachedir)
|
|
|
|
self.cachefile = os.path.join(self.cachedir,"bb_persist_data.sqlite3")
|
|
bb.msg.debug(1, bb.msg.domain.PersistData, "Using '%s' as the persistent data cache" % self.cachefile)
|
|
|
|
self.connection = sqlite3.connect(self.cachefile, timeout=5, isolation_level=None)
|
|
|
|
def addDomain(self, domain):
|
|
"""
|
|
Should be called before any domain is used
|
|
Creates it if it doesn't exist.
|
|
"""
|
|
self.connection.execute("CREATE TABLE IF NOT EXISTS %s(key TEXT, value TEXT);" % domain)
|
|
|
|
def delDomain(self, domain):
|
|
"""
|
|
Removes a domain and all the data it contains
|
|
"""
|
|
self.connection.execute("DROP TABLE IF EXISTS %s;" % domain)
|
|
|
|
def getKeyValues(self, domain):
|
|
"""
|
|
Return a list of key + value pairs for a domain
|
|
"""
|
|
ret = {}
|
|
data = self.connection.execute("SELECT key, value from %s;" % domain)
|
|
for row in data:
|
|
ret[str(row[0])] = str(row[1])
|
|
|
|
return ret
|
|
|
|
def getValue(self, domain, key):
|
|
"""
|
|
Return the value of a key for a domain
|
|
"""
|
|
data = self.connection.execute("SELECT * from %s where key=?;" % domain, [key])
|
|
for row in data:
|
|
return row[1]
|
|
|
|
def setValue(self, domain, key, value):
|
|
"""
|
|
Sets the value of a key for a domain
|
|
"""
|
|
data = self.connection.execute("SELECT * from %s where key=?;" % domain, [key])
|
|
rows = 0
|
|
for row in data:
|
|
rows = rows + 1
|
|
if rows:
|
|
self._execute("UPDATE %s SET value=? WHERE key=?;" % domain, [value, key])
|
|
else:
|
|
self._execute("INSERT into %s(key, value) values (?, ?);" % domain, [key, value])
|
|
|
|
def delValue(self, domain, key):
|
|
"""
|
|
Deletes a key/value pair
|
|
"""
|
|
self._execute("DELETE from %s where key=?;" % domain, [key])
|
|
|
|
def _execute(self, *query):
|
|
while True:
|
|
try:
|
|
self.connection.execute(*query)
|
|
return
|
|
except sqlite3.OperationalError, e:
|
|
if 'database is locked' in str(e):
|
|
continue
|
|
raise
|
|
|
|
|
|
|