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 | from pykota.storage import PyKotaStorageError,BaseStorage,StorageObject,StorageUser,StorageGroup,StoragePrinter,StorageJob,StorageLastJob,StorageUserPQuota,StorageGroupPQuota |
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26 | from pykota.storages.sql import SQLStorage |
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27 | |
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28 | try : |
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29 | import pg |
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30 | except ImportError : |
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31 | import sys |
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32 | # TODO : to translate or not to translate ? |
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33 | raise PyKotaStorageError, "This python version (%s) doesn't seem to have the PygreSQL module installed correctly." % sys.version.split()[0] |
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34 | else : |
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35 | try : |
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36 | PGError = pg.Error |
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37 | except AttributeError : |
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38 | PGError = pg.error |
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39 | |
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40 | class Storage(BaseStorage, SQLStorage) : |
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41 | def __init__(self, pykotatool, host, dbname, user, passwd) : |
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42 | """Opens the PostgreSQL database connection.""" |
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43 | BaseStorage.__init__(self, pykotatool) |
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44 | try : |
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45 | (host, port) = host.split(":") |
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46 | port = int(port) |
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47 | except ValueError : |
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48 | port = -1 # Use PostgreSQL's default tcp/ip port (5432). |
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49 | |
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50 | self.tool.logdebug("Trying to open database (host=%s, port=%s, dbname=%s, user=%s)..." % (host, port, dbname, user)) |
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51 | self.database = pg.connect(host=host, port=port, dbname=dbname, user=user, passwd=passwd) |
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52 | self.closed = 0 |
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53 | self.tool.logdebug("Database opened (host=%s, port=%s, dbname=%s, user=%s)" % (host, port, dbname, user)) |
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54 | |
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55 | def close(self) : |
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56 | """Closes the database connection.""" |
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57 | if not self.closed : |
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58 | self.database.close() |
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59 | self.closed = 1 |
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60 | self.tool.logdebug("Database closed.") |
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61 | |
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62 | def beginTransaction(self) : |
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63 | """Starts a transaction.""" |
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64 | self.database.query("BEGIN;") |
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65 | self.tool.logdebug("Transaction begins...") |
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66 | |
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67 | def commitTransaction(self) : |
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68 | """Commits a transaction.""" |
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69 | self.database.query("COMMIT;") |
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70 | self.tool.logdebug("Transaction committed.") |
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71 | |
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72 | def rollbackTransaction(self) : |
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73 | """Rollbacks a transaction.""" |
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74 | self.database.query("ROLLBACK;") |
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75 | self.tool.logdebug("Transaction aborted.") |
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76 | |
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77 | def doRawSearch(self, query) : |
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78 | """Does a raw search query.""" |
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79 | query = query.strip() |
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80 | if not query.endswith(';') : |
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81 | query += ';' |
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82 | try : |
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83 | self.tool.logdebug("QUERY : %s" % query) |
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84 | result = self.database.query(query) |
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85 | except PGError, msg : |
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86 | raise PyKotaStorageError, str(msg) |
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87 | else : |
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88 | return result |
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89 | |
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90 | def doSearch(self, query) : |
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91 | """Does a search query.""" |
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92 | result = self.doRawSearch(query) |
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93 | if (result is not None) and (result.ntuples() > 0) : |
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94 | return result.dictresult() |
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95 | |
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96 | def doModify(self, query) : |
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97 | """Does a (possibly multiple) modify query.""" |
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98 | query = query.strip() |
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99 | if not query.endswith(';') : |
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100 | query += ';' |
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101 | try : |
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102 | self.tool.logdebug("QUERY : %s" % query) |
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103 | result = self.database.query(query) |
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104 | except PGError, msg : |
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105 | raise PyKotaStorageError, str(msg) |
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106 | else : |
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107 | return result |
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108 | |
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109 | def doQuote(self, field) : |
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110 | """Quotes a field for use as a string in SQL queries.""" |
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111 | if type(field) == type(0.0) : |
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112 | typ = "decimal" |
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113 | elif type(field) == type(0) : |
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114 | typ = "int" |
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115 | elif type(field) == type(0L) : |
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116 | typ = "int" |
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117 | else : |
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118 | typ = "text" |
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119 | return pg._quote(field, typ) |
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