1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
"""BitBake Persistent Data Store
Used to store data in a central location such that other threads/tasks can
access them at some future date. Acts as a convenience wrapper around sqlite,
currently, providing a key/value store accessed by 'domain'.
"""
# Copyright (C) 2007 Richard Purdie
# Copyright (C) 2010 Chris Larson <chris_larson@mentor.com>
#
# 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 collections
import logging
import os.path
import sys
import warnings
import bb.msg, bb.data, bb.utils
try:
import sqlite3
except ImportError:
from pysqlite2 import dbapi2 as sqlite3
sqlversion = sqlite3.sqlite_version_info
if sqlversion[0] < 3 or (sqlversion[0] == 3 and sqlversion[1] < 3):
raise Exception("sqlite3 version 3.3.0 or later is required.")
logger = logging.getLogger("BitBake.PersistData")
class SQLTable(collections.MutableMapping):
"""Object representing a table/domain in the database"""
def __init__(self, cursor, table):
self.cursor = cursor
self.table = table
self._execute("CREATE TABLE IF NOT EXISTS %s(key TEXT, value TEXT);"
% table)
def _execute(self, *query):
"""Execute a query, waiting to acquire a lock if necessary"""
count = 0
while True:
try:
return self.cursor.execute(*query)
break
except sqlite3.OperationalError as exc:
if 'database is locked' in str(exc) and count < 500:
count = count + 1
continue
raise
def __getitem__(self, key):
data = self._execute("SELECT * from %s where key=?;" %
self.table, [key])
for row in data:
return row[1]
def __delitem__(self, key):
self._execute("DELETE from %s where key=?;" % self.table, [key])
def __setitem__(self, key, value):
data = self._execute("SELECT * from %s where key=?;" %
self.table, [key])
exists = len(list(data))
if exists:
self._execute("UPDATE %s SET value=? WHERE key=?;" % self.table,
[value, key])
else:
self._execute("INSERT into %s(key, value) values (?, ?);" %
self.table, [key, value])
def __contains__(self, key):
return key in set(self)
def __len__(self):
data = self._execute("SELECT COUNT(key) FROM %s;" % self.table)
for row in data:
return row[0]
def __iter__(self):
data = self._execute("SELECT key FROM %s;" % self.table)
for row in data:
yield row[0]
def iteritems(self):
data = self._execute("SELECT * FROM %s;" % self.table)
for row in data:
yield row[0], row[1]
def itervalues(self):
data = self._execute("SELECT value FROM %s;" % self.table)
for row in data:
yield row[0]
class SQLData(object):
"""Object representing the persistent data"""
def __init__(self, filename):
bb.utils.mkdirhier(os.path.dirname(filename))
self.filename = filename
self.connection = sqlite3.connect(filename, timeout=5,
isolation_level=None)
self.cursor = self.connection.cursor()
self._tables = {}
def __getitem__(self, table):
if not isinstance(table, basestring):
raise TypeError("table argument must be a string, not '%s'" %
type(table))
if table in self._tables:
return self._tables[table]
else:
tableobj = self._tables[table] = SQLTable(self.cursor, table)
return tableobj
def __delitem__(self, table):
if table in self._tables:
del self._tables[table]
self.cursor.execute("DROP TABLE IF EXISTS %s;" % table)
class PersistData(object):
"""Deprecated representation of the bitbake persistent data store"""
def __init__(self, d):
warnings.warn("Use of PersistData will be deprecated in the future",
category=PendingDeprecationWarning,
stacklevel=2)
self.data = persist(d)
logger.debug(1, "Using '%s' as the persistent data cache",
self.data.filename)
def addDomain(self, domain):
"""
Add a domain (pending deprecation)
"""
return self.data[domain]
def delDomain(self, domain):
"""
Removes a domain and all the data it contains
"""
del self.data[domain]
def getKeyValues(self, domain):
"""
Return a list of key + value pairs for a domain
"""
return self.data[domain].items()
def getValue(self, domain, key):
"""
Return the value of a key for a domain
"""
return self.data[domain][key]
def setValue(self, domain, key, value):
"""
Sets the value of a key for a domain
"""
self.data[domain][key] = value
def delValue(self, domain, key):
"""
Deletes a key/value pair
"""
del self.data[domain][key]
def persist(d):
"""Convenience factory for construction of SQLData based upon metadata"""
cachedir = (bb.data.getVar("PERSISTENT_DIR", d, True) or
bb.data.getVar("CACHE", d, True))
if not cachedir:
logger.critical("Please set the 'PERSISTENT_DIR' or 'CACHE' variable")
sys.exit(1)
cachefile = os.path.join(cachedir, "bb_persist_data.sqlite3")
return SQLData(cachefile)
|
