summaryrefslogtreecommitdiffstats
path: root/bitbake/lib/prserv/db.py
blob: 117d8c052c1721be29a8e446fec0308062739d63 (plain)
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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
#
# SPDX-License-Identifier: GPL-2.0-only
#

import logging
import os.path
import errno
import prserv
import time

try:
    import sqlite3
except ImportError:
    from pysqlite2 import dbapi2 as sqlite3

logger = logging.getLogger("BitBake.PRserv")

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.")

#
# "No History" mode - for a given query tuple (version, pkgarch, checksum),
# the returned value will be the largest among all the values of the same
# (version, pkgarch). This means the PR value returned can NOT be decremented.
#
# "History" mode - Return a new higher value for previously unseen query
# tuple (version, pkgarch, checksum), otherwise return historical value.
# Value can decrement if returning to a previous build.
#

class PRTable(object):
    def __init__(self, conn, table, nohist):
        self.conn = conn
        self.nohist = nohist
        self.dirty = False
        if nohist:
            self.table = "%s_nohist" % table 
        else:
            self.table = "%s_hist" % table 

        self._execute("CREATE TABLE IF NOT EXISTS %s \
                    (version TEXT NOT NULL, \
                    pkgarch TEXT NOT NULL,  \
                    checksum TEXT NOT NULL, \
                    value INTEGER, \
                    PRIMARY KEY (version, pkgarch, checksum));" % self.table)

    def _execute(self, *query):
        """Execute a query, waiting to acquire a lock if necessary"""
        start = time.time()
        end = start + 20
        while True:
            try:
                return self.conn.execute(*query)
            except sqlite3.OperationalError as exc:
                if 'is locked' in str(exc) and end > time.time():
                    continue
                raise exc

    def sync(self):
        self.conn.commit()
        self._execute("BEGIN EXCLUSIVE TRANSACTION")

    def sync_if_dirty(self):
        if self.dirty:
            self.sync()
            self.dirty = False

    def _getValueHist(self, version, pkgarch, checksum):
        data=self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                           (version, pkgarch, checksum))
        row=data.fetchone()
        if row != None:
            return row[0]
        else:
            #no value found, try to insert
            try:
                self._execute("INSERT INTO %s VALUES (?, ?, ?, (select ifnull(max(value)+1,0) from %s where version=? AND pkgarch=?));"
                           % (self.table,self.table),
                           (version,pkgarch, checksum,version, pkgarch))
            except sqlite3.IntegrityError as exc:
                logger.error(str(exc))

            self.dirty = True

            data=self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                               (version, pkgarch, checksum))
            row=data.fetchone()
            if row != None:
                return row[0]
            else:
                raise prserv.NotFoundError

    def _getValueNohist(self, version, pkgarch, checksum):
        data=self._execute("SELECT value FROM %s \
                            WHERE version=? AND pkgarch=? AND checksum=? AND \
                            value >= (select max(value) from %s where version=? AND pkgarch=?);" 
                            % (self.table, self.table),
                            (version, pkgarch, checksum, version, pkgarch))
        row=data.fetchone()
        if row != None:
            return row[0]
        else:
            #no value found, try to insert
            try:
                self._execute("INSERT OR REPLACE INTO %s VALUES (?, ?, ?, (select ifnull(max(value)+1,0) from %s where version=? AND pkgarch=?));"
                               % (self.table,self.table),
                               (version, pkgarch, checksum, version, pkgarch))
            except sqlite3.IntegrityError as exc:
                logger.error(str(exc))
                self.conn.rollback()

            self.dirty = True

            data=self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                               (version, pkgarch, checksum))
            row=data.fetchone()
            if row != None:
                return row[0]
            else:
                raise prserv.NotFoundError

    def getValue(self, version, pkgarch, checksum):
        if self.nohist:
            return self._getValueNohist(version, pkgarch, checksum)
        else:
            return self._getValueHist(version, pkgarch, checksum)

    def _importHist(self, version, pkgarch, checksum, value):
        val = None 
        data = self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                           (version, pkgarch, checksum))
        row = data.fetchone()
        if row != None:
            val=row[0]
        else:
            #no value found, try to insert
            try:
                self._execute("INSERT INTO %s VALUES (?, ?, ?, ?);"  % (self.table),
                           (version, pkgarch, checksum, value))
            except sqlite3.IntegrityError as exc:
                logger.error(str(exc))

            self.dirty = True

            data = self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                           (version, pkgarch, checksum))
            row = data.fetchone()
            if row != None:
                val = row[0]
        return val

    def _importNohist(self, version, pkgarch, checksum, value):
        try:
            #try to insert
            self._execute("INSERT INTO %s VALUES (?, ?, ?, ?);"  % (self.table),
                           (version, pkgarch, checksum,value))
        except sqlite3.IntegrityError as exc:
            #already have the record, try to update
            try:
                self._execute("UPDATE %s SET value=? WHERE version=? AND pkgarch=? AND checksum=? AND value<?"  
                              % (self.table),
                               (value,version,pkgarch,checksum,value))
            except sqlite3.IntegrityError as exc:
                logger.error(str(exc))

        self.dirty = True

        data = self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=? AND value>=?;" % self.table,
                            (version,pkgarch,checksum,value))
        row=data.fetchone()
        if row != None:
            return row[0]
        else:
            return None

    def importone(self, version, pkgarch, checksum, value):
        if self.nohist:
            return self._importNohist(version, pkgarch, checksum, value)
        else:
            return self._importHist(version, pkgarch, checksum, value)

    def export(self, version, pkgarch, checksum, colinfo):
        metainfo = {}
        #column info 
        if colinfo:
            metainfo['tbl_name'] = self.table
            metainfo['core_ver'] = prserv.__version__
            metainfo['col_info'] = []
            data = self._execute("PRAGMA table_info(%s);" % self.table)
            for row in data:
                col = {}
                col['name'] = row['name']
                col['type'] = row['type']
                col['notnull'] = row['notnull']
                col['dflt_value'] = row['dflt_value']
                col['pk'] = row['pk']
                metainfo['col_info'].append(col)

        #data info
        datainfo = []

        if self.nohist:
            sqlstmt = "SELECT T1.version, T1.pkgarch, T1.checksum, T1.value FROM %s as T1, \
                    (SELECT version,pkgarch,max(value) as maxvalue FROM %s GROUP BY version,pkgarch) as T2 \
                    WHERE T1.version=T2.version AND T1.pkgarch=T2.pkgarch AND T1.value=T2.maxvalue " % (self.table, self.table)
        else:
            sqlstmt = "SELECT * FROM %s as T1 WHERE 1=1 " % self.table
        sqlarg = []
        where = ""
        if version:
            where += "AND T1.version=? "
            sqlarg.append(str(version))
        if pkgarch:
            where += "AND T1.pkgarch=? "
            sqlarg.append(str(pkgarch))
        if checksum:
            where += "AND T1.checksum=? "
            sqlarg.append(str(checksum))

        sqlstmt += where + ";"

        if len(sqlarg):
            data = self._execute(sqlstmt, tuple(sqlarg))
        else:
            data = self._execute(sqlstmt)
        for row in data:
            if row['version']:
                col = {}
                col['version'] = row['version']
                col['pkgarch'] = row['pkgarch']
                col['checksum'] = row['checksum']
                col['value'] = row['value']
                datainfo.append(col)
        return (metainfo, datainfo)

    def dump_db(self, fd):
        writeCount = 0
        for line in self.conn.iterdump():
            writeCount = writeCount + len(line) + 1
            fd.write(line)
            fd.write('\n')
        return writeCount

class PRData(object):
    """Object representing the PR database"""
    def __init__(self, filename, nohist=True):
        self.filename=os.path.abspath(filename)
        self.nohist=nohist
        #build directory hierarchy
        try:
            os.makedirs(os.path.dirname(self.filename))
        except OSError as e:
            if e.errno != errno.EEXIST:
                raise e
        self.connection=sqlite3.connect(self.filename, isolation_level="EXCLUSIVE", check_same_thread = False)
        self.connection.row_factory=sqlite3.Row
        self.connection.execute("pragma synchronous = off;")
        self.connection.execute("PRAGMA journal_mode = MEMORY;")
        self._tables={}

    def disconnect(self):
        self.connection.close()

    def __getitem__(self,tblname):
        if not isinstance(tblname, str):
            raise TypeError("tblname argument must be a string, not '%s'" %
                            type(tblname))
        if tblname in self._tables:
            return self._tables[tblname]
        else:
            tableobj = self._tables[tblname] = PRTable(self.connection, tblname, self.nohist)
            return tableobj

    def __delitem__(self, tblname):
        if tblname in self._tables:
            del self._tables[tblname]
        logger.info("drop table %s" % (tblname))
        self.connection.execute("DROP TABLE IF EXISTS %s;" % tblname)