fpdb/pyfpdb/fpdb_db.py

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#!/usr/bin/python
#Copyright 2008 Steffen Jobbagy-Felso
#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU Affero General Public License as published by
#the Free Software Foundation, version 3 of the License.
#
#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 Affero General Public License
#along with this program. If not, see <http://www.gnu.org/licenses/>.
#In the "official" distribution you can find the license in
#agpl-3.0.txt in the docs folder of the package.
import os
import re
import sys
import logging
from time import time, strftime
import fpdb_simple
import FpdbSQLQueries
class fpdb_db:
MYSQL_INNODB = 2
PGSQL = 3
SQLITE = 4
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def __init__(self):
"""Simple constructor, doesnt really do anything"""
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self.db = None
self.cursor = None
self.sql = {}
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#end def __init__
def do_connect(self, config=None):
"""Connects a database using information in config"""
if config is None:
raise FpdbError('Configuration not defined')
self.settings = {}
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self.settings['os'] = "linuxmac" if os.name != "nt" else "windows"
db = config.get_db_parameters()
self.connect(backend=db['db-backend'],
host=db['db-host'],
database=db['db-databaseName'],
user=db['db-user'],
password=db['db-password'])
#end def do_connect
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def connect(self, backend=None, host=None, database=None,
user=None, password=None):
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"""Connects a database with the given parameters"""
if backend is None:
raise FpdbError('Database backend not defined')
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self.backend=backend
self.host=host
self.user=user
self.password=password
self.database=database
if backend==fpdb_db.MYSQL_INNODB:
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import MySQLdb
try:
self.db = MySQLdb.connect(host = host, user = user, passwd = password, db = database, use_unicode=True)
except:
raise fpdb_simple.FpdbError("MySQL connection failed")
elif backend==fpdb_db.PGSQL:
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import psycopg2
import psycopg2.extensions
psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
# If DB connection is made over TCP, then the variables
# host, user and password are required
# For local domain-socket connections, only DB name is
# needed, and everything else is in fact undefined and/or
# flat out wrong
# sqlcoder: This database only connect failed in my windows setup??
# Modifed it to try the 4 parameter style if the first connect fails - does this work everywhere?
connected = False
if self.host == "localhost" or self.host == "127.0.0.1":
try:
self.db = psycopg2.connect(database = database)
connected = True
except:
pass
#msg = "PostgreSQL direct connection to database (%s) failed, trying with user ..." % (database,)
#print msg
#raise fpdb_simple.FpdbError(msg)
if not connected:
try:
self.db = psycopg2.connect(host = host,
user = user,
password = password,
database = database)
except:
msg = "PostgreSQL connection to database (%s) user (%s) failed." % (database, user)
print msg
raise fpdb_simple.FpdbError(msg)
elif backend==fpdb_db.SQLITE:
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logging.info("Connecting to SQLite:%(database)s" % {'database':database})
import sqlite3
self.db = sqlite3.connect(database,detect_types=sqlite3.PARSE_DECLTYPES)
sqlite3.register_converter("bool", lambda x: bool(int(x)))
sqlite3.register_adapter(bool, lambda x: "1" if x else "0")
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else:
raise fpdb_simple.FpdbError("unrecognised database backend:"+backend)
self.cursor=self.db.cursor()
# Set up query dictionary as early in the connection process as we can.
self.sql = FpdbSQLQueries.FpdbSQLQueries(self.get_backend_name())
self.cursor.execute(self.sql.query['set tx level'])
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self.wrongDbVersion=False
try:
self.cursor.execute("SELECT * FROM Settings")
settings=self.cursor.fetchone()
if settings[0]!=118:
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print "outdated or too new database version - please recreate tables"
self.wrongDbVersion=True
except:# _mysql_exceptions.ProgrammingError:
print "failed to read settings table - please recreate tables"
self.wrongDbVersion=True
#end def connect
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def disconnect(self, due_to_error=False):
"""Disconnects the DB"""
if due_to_error:
self.db.rollback()
else:
self.db.commit()
self.cursor.close()
self.db.close()
#end def disconnect
def reconnect(self, due_to_error=False):
"""Reconnects the DB"""
#print "started fpdb_db.reconnect"
self.disconnect(due_to_error)
self.connect(self.backend, self.host, self.database, self.user, self.password)
def get_backend_name(self):
"""Returns the name of the currently used backend"""
if self.backend==2:
return "MySQL InnoDB"
elif self.backend==3:
return "PostgreSQL"
elif self.backend==4:
return "SQLite"
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else:
raise fpdb_simple.FpdbError("invalid backend")
#end def get_backend_name
def get_db_info(self):
return (self.host, self.database, self.user, self.password)
#end def get_db_info
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def getLastInsertId(self, cursor=None):
try:
if self.backend == self.MYSQL_INNODB:
ret = self.db.insert_id()
if ret < 1 or ret > 999999999:
print "getLastInsertId(): problem fetching insert_id? ret=", ret
ret = -1
elif self.backend == self.PGSQL:
# some options:
# currval(hands_id_seq) - use name of implicit seq here
# lastval() - still needs sequences set up?
# insert ... returning is useful syntax (but postgres specific?)
# see rules (fancy trigger type things)
c = self.db.cursor()
ret = c.execute ("SELECT lastval()")
row = c.fetchone()
if not row:
print "getLastInsertId(%s): problem fetching lastval? row=" % seq, row
ret = -1
else:
ret = row[0]
elif self.backend == fpdb_db.SQLITE:
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ret = cursor.lastrowid
else:
print "getLastInsertId(): unknown backend ", self.backend
ret = -1
except:
ret = -1
print "getLastInsertId error:", str(sys.exc_value), " ret =", ret
raise fpdb_simple.FpdbError( "getLastInsertId error: " + str(sys.exc_value) )
return ret
def storeHand(self, p):
#stores into table hands:
self.cursor.execute ("""INSERT INTO Hands (
tablename,
sitehandno,
gametypeid,
handstart,
importtime,
seats,
maxseats,
boardcard1,
boardcard2,
boardcard3,
boardcard4,
boardcard5,
-- texture,
playersVpi,
playersAtStreet1,
playersAtStreet2,
playersAtStreet3,
playersAtStreet4,
playersAtShowdown,
street0Raises,
street1Raises,
street2Raises,
street3Raises,
street4Raises,
-- street1Pot,
-- street2Pot,
-- street3Pot,
-- street4Pot,
-- showdownPot
)
VALUES
(%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
%s, %s, %s, %s, %s, %s, %s)""",
(
p['tablename'],
p['sitehandno'],
p['gametypeid'],
p['handStart'],
datetime.datetime.today(),
len(p['names']),
p['maxSeats'],
p['boardcard1'],
p['boardcard2'],
p['boardcard3'],
p['boardcard4'],
p['boardcard5'],
hudCache['playersVpi'],
hudCache['playersAtStreet1'],
hudCache['playersAtStreet2'],
hudCache['playersAtStreet3'],
hudCache['playersAtStreet4'],
hudCache['playersAtShowdown'],
hudCache['street0Raises'],
hudCache['street1Raises'],
hudCache['street2Raises'],
hudCache['street3Raises'],
hudCache['street4Raises'],
hudCache['street1Pot'],
hudCache['street2Pot'],
hudCache['street3Pot'],
hudCache['street4Pot'],
hudCache['showdownPot']
)
)
#return getLastInsertId(backend, conn, cursor)
#end class fpdb_db