Mariano Benedettini
53194e3784
Since changeset 01399128964f, the uri port is an integer and so it must be convert to string for command line. issue4490 review6861002
384 lines
13 KiB
Python
384 lines
13 KiB
Python
# This file is part of Tryton. The COPYRIGHT file at the top level of
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# this repository contains the full copyright notices and license terms.
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from trytond.backend.database import DatabaseInterface, CursorInterface
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from trytond.config import config, parse_uri
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from psycopg2.pool import ThreadedConnectionPool
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from psycopg2.extensions import cursor as PsycopgCursor
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from psycopg2.extensions import ISOLATION_LEVEL_REPEATABLE_READ
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from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT
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from psycopg2.extensions import register_type, register_adapter
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from psycopg2.extensions import UNICODE, AsIs
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try:
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from psycopg2.extensions import PYDATE, PYDATETIME, PYTIME
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except ImportError:
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PYDATE, PYDATETIME, PYTIME = None, None, None
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from psycopg2 import IntegrityError as DatabaseIntegrityError
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from psycopg2 import OperationalError as DatabaseOperationalError
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import time
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import logging
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import re
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import os
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if os.name == 'posix':
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import pwd
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from decimal import Decimal
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from sql import Flavor
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__all__ = ['Database', 'DatabaseIntegrityError', 'DatabaseOperationalError',
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'Cursor']
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RE_VERSION = re.compile(r'\S+ (\d+)\.(\d+)')
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os.environ['PGTZ'] = os.environ.get('TZ', '')
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class Database(DatabaseInterface):
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_databases = {}
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_connpool = None
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_list_cache = None
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_list_cache_timestamp = None
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_version_cache = {}
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flavor = Flavor(ilike=True)
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def __new__(cls, database_name='template1'):
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if database_name in cls._databases:
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return cls._databases[database_name]
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return DatabaseInterface.__new__(cls, database_name=database_name)
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def __init__(self, database_name='template1'):
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super(Database, self).__init__(database_name=database_name)
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self._databases.setdefault(database_name, self)
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def connect(self):
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if self._connpool is not None:
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return self
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logger = logging.getLogger('database')
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logger.info('connect to "%s"' % self.database_name)
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uri = parse_uri(config.get('database', 'uri'))
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assert uri.scheme == 'postgresql'
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host = uri.hostname and "host=%s" % uri.hostname or ''
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port = uri.port and "port=%s" % uri.port or ''
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name = "dbname=%s" % self.database_name
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user = uri.username and "user=%s" % uri.username or ''
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password = uri.password and "password=%s" % uri.password or ''
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minconn = config.getint('database', 'minconn', 1)
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maxconn = config.getint('database', 'maxconn', 64)
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dsn = '%s %s %s %s %s' % (host, port, name, user, password)
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self._connpool = ThreadedConnectionPool(minconn, maxconn, dsn)
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return self
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def cursor(self, autocommit=False, readonly=False):
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if self._connpool is None:
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self.connect()
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conn = self._connpool.getconn()
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if autocommit:
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conn.set_isolation_level(ISOLATION_LEVEL_AUTOCOMMIT)
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else:
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conn.set_isolation_level(ISOLATION_LEVEL_REPEATABLE_READ)
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cursor = Cursor(self._connpool, conn, self)
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if readonly:
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cursor.execute('SET TRANSACTION READ ONLY')
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return cursor
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def close(self):
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if self._connpool is None:
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return
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self._connpool.closeall()
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self._connpool = None
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@classmethod
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def create(cls, cursor, database_name):
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cursor.execute('CREATE DATABASE "' + database_name + '" '
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'TEMPLATE template0 ENCODING \'unicode\'')
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cls._list_cache = None
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@classmethod
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def drop(cls, cursor, database_name):
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cursor.execute('DROP DATABASE "' + database_name + '"')
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cls._list_cache = None
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def get_version(self, cursor):
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if self.database_name not in self._version_cache:
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cursor.execute('SELECT version()')
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version, = cursor.fetchone()
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self._version_cache[self.database_name] = tuple(map(int,
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RE_VERSION.search(version).groups()))
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return self._version_cache[self.database_name]
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@staticmethod
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def dump(database_name):
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from trytond.tools import exec_command_pipe
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cmd = ['pg_dump', '--format=c', '--no-owner']
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env = {}
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uri = parse_uri(config.get('database', 'uri'))
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if uri.username:
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cmd.append('--username=' + uri.username)
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if uri.hostname:
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cmd.append('--host=' + uri.hostname)
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if uri.port:
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cmd.append('--port=' + str(uri.port))
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if uri.password:
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# if db_password is set in configuration we should pass
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# an environment variable PGPASSWORD to our subprocess
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# see libpg documentation
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env['PGPASSWORD'] = uri.password
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cmd.append(database_name)
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pipe = exec_command_pipe(*tuple(cmd), env=env)
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pipe.stdin.close()
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data = pipe.stdout.read()
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res = pipe.wait()
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if res:
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raise Exception('Couldn\'t dump database!')
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return data
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@staticmethod
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def restore(database_name, data):
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from trytond.tools import exec_command_pipe
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database = Database().connect()
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cursor = database.cursor(autocommit=True)
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database.create(cursor, database_name)
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cursor.commit()
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cursor.close()
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cmd = ['pg_restore', '--no-owner']
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env = {}
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uri = parse_uri(config.get('database', 'uri'))
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if uri.username:
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cmd.append('--username=' + uri.username)
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if uri.hostname:
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cmd.append('--host=' + uri.hostname)
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if uri.port:
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cmd.append('--port=' + str(uri.port))
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if uri.password:
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env['PGPASSWORD'] = uri.password
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cmd.append('--dbname=' + database_name)
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args2 = tuple(cmd)
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if os.name == "nt":
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tmpfile = (os.environ['TMP'] or 'C:\\') + os.tmpnam()
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with open(tmpfile, 'wb') as fp:
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fp.write(data)
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args2 = list(args2)
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args2.append(' ' + tmpfile)
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args2 = tuple(args2)
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pipe = exec_command_pipe(*args2, env=env)
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if not os.name == "nt":
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pipe.stdin.write(data)
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pipe.stdin.close()
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res = pipe.wait()
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if res:
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raise Exception('Couldn\'t restore database')
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database = Database(database_name).connect()
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cursor = database.cursor()
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if not cursor.test():
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cursor.close()
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database.close()
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raise Exception('Couldn\'t restore database!')
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cursor.close()
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database.close()
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Database._list_cache = None
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return True
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@staticmethod
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def list(cursor):
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now = time.time()
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timeout = config.getint('session', 'timeout')
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res = Database._list_cache
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if res and abs(Database._list_cache_timestamp - now) < timeout:
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return res
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uri = parse_uri(config.get('database', 'uri'))
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db_user = uri.username or os.environment.get('PGUSER')
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if not db_user and os.name == 'posix':
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db_user = pwd.getpwuid(os.getuid())[0]
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if db_user:
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cursor.execute("SELECT datname "
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"FROM pg_database "
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"WHERE datdba = ("
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"SELECT usesysid "
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"FROM pg_user "
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"WHERE usename=%s) "
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"AND datname not in "
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"('template0', 'template1', 'postgres') "
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"ORDER BY datname",
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(db_user,))
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else:
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cursor.execute("SELECT datname "
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"FROM pg_database "
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"WHERE datname not in "
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"('template0', 'template1','postgres') "
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"ORDER BY datname")
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res = []
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for db_name, in cursor.fetchall():
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db_name = db_name.encode('utf-8')
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try:
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database = Database(db_name).connect()
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except Exception:
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continue
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cursor2 = database.cursor()
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if cursor2.test():
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res.append(db_name)
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cursor2.close(close=True)
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else:
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cursor2.close(close=True)
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database.close()
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Database._list_cache = res
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Database._list_cache_timestamp = now
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return res
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@staticmethod
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def init(cursor):
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from trytond.modules import get_module_info
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sql_file = os.path.join(os.path.dirname(__file__), 'init.sql')
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with open(sql_file) as fp:
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for line in fp.read().split(';'):
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if (len(line) > 0) and (not line.isspace()):
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cursor.execute(line)
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for module in ('ir', 'res', 'webdav'):
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state = 'uninstalled'
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if module in ('ir', 'res'):
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state = 'to install'
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info = get_module_info(module)
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cursor.execute('SELECT NEXTVAL(\'ir_module_module_id_seq\')')
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module_id = cursor.fetchone()[0]
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cursor.execute('INSERT INTO ir_module_module '
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'(id, create_uid, create_date, name, state) '
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'VALUES (%s, %s, now(), %s, %s)',
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(module_id, 0, module, state))
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for dependency in info.get('depends', []):
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cursor.execute('INSERT INTO ir_module_module_dependency '
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'(create_uid, create_date, module, name) '
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'VALUES (%s, now(), %s, %s)',
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(0, module_id, dependency))
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class _Cursor(PsycopgCursor):
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def __build_dict(self, row):
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return dict((desc[0], row[i])
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for i, desc in enumerate(self.description))
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def dictfetchone(self):
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row = self.fetchone()
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if row:
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return self.__build_dict(row)
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else:
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return row
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def dictfetchmany(self, size):
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rows = self.fetchmany(size)
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return [self.__build_dict(row) for row in rows]
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def dictfetchall(self):
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rows = self.fetchall()
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return [self.__build_dict(row) for row in rows]
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class Cursor(CursorInterface):
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def __init__(self, connpool, conn, database):
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super(Cursor, self).__init__()
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self._connpool = connpool
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self._conn = conn
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self._database = database
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self.cursor = conn.cursor(cursor_factory=_Cursor)
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self.commit()
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self.sql_from_log = {}
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self.sql_into_log = {}
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self.count = {
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'from': 0,
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'into': 0,
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}
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@property
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def database_name(self):
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return self._database.database_name
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# TODO to remove
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@property
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def dbname(self):
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return self.database_name
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def __getattr__(self, name):
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return getattr(self.cursor, name)
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def execute(self, sql, params=None):
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if params:
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return self.cursor.execute(sql, params)
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else:
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return self.cursor.execute(sql)
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def close(self, close=False):
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self.cursor.close()
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self.rollback()
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self._connpool.putconn(self._conn, close=close)
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def commit(self):
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super(Cursor, self).commit()
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self._conn.commit()
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def rollback(self):
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super(Cursor, self).rollback()
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self._conn.rollback()
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def test(self):
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self.cursor.execute("SELECT relname "
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"FROM pg_class "
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"WHERE relkind = 'r' AND relname in ("
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"'ir_model', "
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"'ir_model_field', "
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"'ir_ui_view', "
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"'ir_ui_menu', "
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"'res_user', "
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"'res_group', "
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"'ir_module_module', "
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"'ir_module_module_dependency', "
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"'ir_translation', "
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"'ir_lang'"
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")")
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return len(self.cursor.fetchall()) != 0
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def nextid(self, table):
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self.cursor.execute("SELECT NEXTVAL('" + table + "_id_seq')")
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return self.cursor.fetchone()[0]
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def setnextid(self, table, value):
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self.cursor.execute("SELECT SETVAL('" + table + "_id_seq', %d)"
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% value)
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def currid(self, table):
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self.cursor.execute('SELECT last_value FROM "' + table + '_id_seq"')
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return self.cursor.fetchone()[0]
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def lock(self, table):
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self.cursor.execute('LOCK "%s" IN EXCLUSIVE MODE NOWAIT' % table)
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def has_constraint(self):
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return True
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def limit_clause(self, select, limit=None, offset=None):
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if limit is not None:
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select += ' LIMIT %d' % limit
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if offset is not None and offset != 0:
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select += ' OFFSET %d' % offset
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return select
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def has_returning(self):
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# RETURNING clause is available since PostgreSQL 8.2
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return self._database.get_version(self) >= (8, 2)
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register_type(UNICODE)
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if PYDATE:
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register_type(PYDATE)
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if PYDATETIME:
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register_type(PYDATETIME)
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if PYTIME:
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register_type(PYTIME)
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register_adapter(float, lambda value: AsIs(repr(value)))
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register_adapter(Decimal, lambda value: AsIs(str(value)))
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