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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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20 | # |
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21 | # $Id$ |
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22 | # |
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23 | # |
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24 | |
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25 | ######################################################################## |
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26 | ## ## |
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27 | ## THIS FILE IS HIGHLY EXPERIMENTAL. ## |
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28 | ## ## |
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29 | ## IT WILL PROVIDE DATABASE INDEPENDANCE IN THE FUTURE. ## |
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30 | ## ## |
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31 | ## FOR NOW IT ONLY RECOGNIZES THE POSTGRESQL DBI MODULE. ## |
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32 | ## ## |
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33 | ## DON'T USE THIS UNTIL YOU ARE TOLD TO DO SO. ## |
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34 | ## ## |
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35 | ## THANKS ! ## |
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36 | ## ## |
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37 | ######################################################################## |
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38 | |
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39 | from pykota.storage import PyKotaStorageError,BaseStorage,StorageObject,StorageUser,StorageGroup,StoragePrinter,StorageJob,StorageLastJob,StorageUserPQuota,StorageGroupPQuota |
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40 | from pykota.storages.sql import SQLStorage |
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41 | |
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42 | try : |
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43 | import _pg |
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44 | import pgdb |
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45 | except ImportError : |
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46 | import sys |
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47 | # TODO : to translate or not to translate ? |
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48 | raise PyKotaStorageError, "This python version (%s) doesn't seem to have the PygreSQL module installed correctly." % sys.version.split()[0] |
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49 | |
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50 | class Storage(BaseStorage, SQLStorage) : |
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51 | def __init__(self, pykotatool, host, dbname, user, passwd) : |
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52 | """Opens the Database Independant connection.""" |
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53 | BaseStorage.__init__(self, pykotatool) |
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54 | try : |
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55 | (host, port) = host.split(":") |
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56 | port = int(port) |
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57 | except ValueError : |
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58 | port = -1 # Use PostgreSQL's default tcp/ip port (5432). |
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59 | |
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60 | try : |
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61 | self.database = pgdb.connect(host=host, database=dbname, user=user, password=passwd) |
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62 | self.cursor = self.database.cursor() |
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63 | except _pg.error, msg : |
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64 | raise PyKotaStorageError, msg |
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65 | else : |
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66 | self.closed = 0 |
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67 | self.tool.logdebug("Database opened (host=%s, port=%s, dbname=%s, user=%s)" % (host, port, dbname, user)) |
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68 | |
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69 | def close(self) : |
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70 | """Closes the database connection.""" |
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71 | if not self.closed : |
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72 | self.cursor.close() |
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73 | self.database.close() |
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74 | self.closed = 1 |
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75 | self.tool.logdebug("Database closed.") |
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76 | |
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77 | def beginTransaction(self) : |
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78 | """Starts a transaction.""" |
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79 | # No need for this since transactions begin automatically |
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80 | # self.database.query("BEGIN;") |
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81 | self.tool.logdebug("Transaction begins...") |
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82 | |
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83 | def commitTransaction(self) : |
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84 | """Commits a transaction.""" |
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85 | self.database.commit() |
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86 | self.tool.logdebug("Transaction committed.") |
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87 | |
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88 | def rollbackTransaction(self) : |
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89 | """Rollbacks a transaction.""" |
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90 | self.database.rollback() |
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91 | self.tool.logdebug("Transaction aborted.") |
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92 | |
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93 | def doSearch(self, query) : |
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94 | """Does a search query.""" |
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95 | query = query.strip() |
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96 | if not query.endswith(';') : |
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97 | query += ';' |
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98 | try : |
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99 | self.tool.logdebug("QUERY : %s" % query) |
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100 | self.cursor.execute(query) |
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101 | result = self.cursor.fetchall() |
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102 | except pgdb.DatabaseError, msg : |
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103 | raise PyKotaStorageError, msg |
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104 | else : |
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105 | newresult = [] |
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106 | fieldsnames = [desc[0] for desc in self.cursor.description] |
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107 | for record in result : |
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108 | dico = {} |
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109 | for fnumber in range(len(record)) : |
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110 | dico.update({fieldsnames[fnumber] : record[fnumber]}) |
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111 | newresult.append(dico) |
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112 | return newresult |
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113 | |
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114 | def doModify(self, query) : |
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115 | """Does a (possibly multiple) modify query.""" |
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116 | query = query.strip() |
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117 | if not query.endswith(';') : |
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118 | query += ';' |
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119 | try : |
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120 | self.tool.logdebug("QUERY : %s" % query) |
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121 | result = self.database.query(query) |
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122 | except pg.error, msg : |
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123 | raise PyKotaStorageError, msg |
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124 | else : |
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125 | return result |
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126 | |
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127 | def doQuote(self, field) : |
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128 | """Quotes a field for use as a string in SQL queries.""" |
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129 | return pgdb._quote(field) |
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