[1327] | 1 | # PyKota |
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| 2 | # -*- coding: ISO-8859-15 -*- |
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| 3 | # |
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| 4 | # PyKota : Print Quotas for CUPS and LPRng |
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| 5 | # |
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| 6 | # (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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| 7 | # This program is free software; you can redistribute it and/or modify |
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| 8 | # it under the terms of the GNU General Public License as published by |
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| 9 | # the Free Software Foundation; either version 2 of the License, or |
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| 10 | # (at your option) any later version. |
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| 11 | # |
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| 12 | # This program is distributed in the hope that it will be useful, |
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| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | # GNU General Public License for more details. |
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| 16 | # |
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| 17 | # You should have received a copy of the GNU General Public License |
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| 18 | # along with this program; if not, write to the Free Software |
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| 19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 20 | # |
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| 21 | # $Id$ |
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| 22 | # |
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| 23 | # $Log$ |
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[1743] | 24 | # Revision 1.2 2004/09/24 21:19:48 jalet |
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| 25 | # Did a pass of PyChecker |
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| 26 | # |
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[1327] | 27 | # Revision 1.1 2004/02/02 22:44:15 jalet |
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| 28 | # Preliminary work on Relationnal Database Independance via DB-API 2.0 |
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| 29 | # |
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| 30 | # |
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| 31 | # |
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| 32 | |
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| 33 | ######################################################################## |
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| 34 | ## ## |
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| 35 | ## THIS FILE IS HIGHLY EXPERIMENTAL. ## |
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| 36 | ## ## |
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| 37 | ## IT WILL PROVIDE DATABASE INDEPENDANCE IN THE FUTURE. ## |
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| 38 | ## ## |
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| 39 | ## FOR NOW IT ONLY RECOGNIZES THE POSTGRESQL DBI MODULE. ## |
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| 40 | ## ## |
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| 41 | ## DON'T USE THIS UNTIL YOU ARE TOLD TO DO SO. ## |
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| 42 | ## ## |
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| 43 | ## THANKS ! ## |
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| 44 | ## ## |
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| 45 | ######################################################################## |
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| 46 | |
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| 47 | from pykota.storage import PyKotaStorageError,BaseStorage,StorageObject,StorageUser,StorageGroup,StoragePrinter,StorageJob,StorageLastJob,StorageUserPQuota,StorageGroupPQuota |
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[1743] | 48 | from pykota.storages.sql import SQLStorage |
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[1327] | 49 | |
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| 50 | try : |
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| 51 | import _pg |
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| 52 | import pgdb |
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| 53 | except ImportError : |
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| 54 | import sys |
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| 55 | # TODO : to translate or not to translate ? |
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| 56 | raise PyKotaStorageError, "This python version (%s) doesn't seem to have the PygreSQL module installed correctly." % sys.version.split()[0] |
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| 57 | |
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| 58 | class Storage(BaseStorage, SQLStorage) : |
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| 59 | def __init__(self, pykotatool, host, dbname, user, passwd) : |
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| 60 | """Opens the Database Independant connection.""" |
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| 61 | BaseStorage.__init__(self, pykotatool) |
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| 62 | try : |
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| 63 | (host, port) = host.split(":") |
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| 64 | port = int(port) |
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| 65 | except ValueError : |
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| 66 | port = -1 # Use PostgreSQL's default tcp/ip port (5432). |
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| 67 | |
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| 68 | try : |
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| 69 | self.database = pgdb.connect(host=host, database=dbname, user=user, password=passwd) |
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| 70 | self.cursor = self.database.cursor() |
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| 71 | except _pg.error, msg : |
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| 72 | raise PyKotaStorageError, msg |
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| 73 | else : |
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| 74 | self.closed = 0 |
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| 75 | self.tool.logdebug("Database opened (host=%s, port=%s, dbname=%s, user=%s)" % (host, port, dbname, user)) |
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| 76 | |
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| 77 | def close(self) : |
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| 78 | """Closes the database connection.""" |
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| 79 | if not self.closed : |
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| 80 | self.cursor.close() |
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| 81 | self.database.close() |
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| 82 | self.closed = 1 |
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| 83 | self.tool.logdebug("Database closed.") |
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| 84 | |
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| 85 | def beginTransaction(self) : |
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| 86 | """Starts a transaction.""" |
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| 87 | # No need for this since transactions begin automatically |
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| 88 | # self.database.query("BEGIN;") |
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| 89 | self.tool.logdebug("Transaction begins...") |
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| 90 | |
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| 91 | def commitTransaction(self) : |
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| 92 | """Commits a transaction.""" |
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| 93 | self.database.commit() |
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| 94 | self.tool.logdebug("Transaction committed.") |
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| 95 | |
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| 96 | def rollbackTransaction(self) : |
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| 97 | """Rollbacks a transaction.""" |
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| 98 | self.database.rollback() |
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| 99 | self.tool.logdebug("Transaction aborted.") |
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| 100 | |
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| 101 | def doSearch(self, query) : |
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| 102 | """Does a search query.""" |
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| 103 | query = query.strip() |
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| 104 | if not query.endswith(';') : |
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| 105 | query += ';' |
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| 106 | try : |
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| 107 | self.tool.logdebug("QUERY : %s" % query) |
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| 108 | self.cursor.execute(query) |
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| 109 | result = self.cursor.fetchall() |
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| 110 | except pgdb.DatabaseError, msg : |
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| 111 | raise PyKotaStorageError, msg |
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| 112 | else : |
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| 113 | newresult = [] |
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| 114 | fieldsnames = [desc[0] for desc in self.cursor.description] |
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| 115 | for record in result : |
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| 116 | dico = {} |
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| 117 | for fnumber in range(len(record)) : |
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| 118 | dico.update({fieldsnames[fnumber] : record[fnumber]}) |
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| 119 | newresult.append(dico) |
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| 120 | return newresult |
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| 121 | |
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| 122 | def doModify(self, query) : |
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| 123 | """Does a (possibly multiple) modify query.""" |
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| 124 | query = query.strip() |
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| 125 | if not query.endswith(';') : |
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| 126 | query += ';' |
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| 127 | try : |
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| 128 | self.tool.logdebug("QUERY : %s" % query) |
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| 129 | result = self.database.query(query) |
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| 130 | except pg.error, msg : |
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| 131 | raise PyKotaStorageError, msg |
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| 132 | else : |
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| 133 | return result |
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| 134 | |
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| 135 | def doQuote(self, field) : |
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| 136 | """Quotes a field for use as a string in SQL queries.""" |
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| 137 | return pgdb._quote(field) |
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