[1021] | 1 | # PyKota |
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[1144] | 2 | # -*- coding: ISO-8859-15 -*- |
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[1021] | 3 | # |
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| 4 | # PyKota : Print Quotas for CUPS and LPRng |
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| 5 | # |
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[2622] | 6 | # (c) 2003, 2004, 2005, 2006 Jerome Alet <alet@librelogiciel.com> |
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[1021] | 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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[2302] | 19 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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[1021] | 20 | # |
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| 21 | # $Id$ |
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| 22 | # |
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[2033] | 23 | # |
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[1021] | 24 | |
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[2741] | 25 | import time |
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[2599] | 26 | from types import StringType |
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| 27 | |
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[2830] | 28 | from pykota.storage import PyKotaStorageError, BaseStorage |
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[1327] | 29 | from pykota.storages.sql import SQLStorage |
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[1021] | 30 | |
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| 31 | try : |
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| 32 | import pg |
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| 33 | except ImportError : |
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| 34 | import sys |
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| 35 | # TODO : to translate or not to translate ? |
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| 36 | raise PyKotaStorageError, "This python version (%s) doesn't seem to have the PygreSQL module installed correctly." % sys.version.split()[0] |
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[2031] | 37 | else : |
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| 38 | try : |
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| 39 | PGError = pg.Error |
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| 40 | except AttributeError : |
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| 41 | PGError = pg.error |
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[1021] | 42 | |
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[1327] | 43 | class Storage(BaseStorage, SQLStorage) : |
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[1021] | 44 | def __init__(self, pykotatool, host, dbname, user, passwd) : |
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| 45 | """Opens the PostgreSQL database connection.""" |
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[1130] | 46 | BaseStorage.__init__(self, pykotatool) |
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[1021] | 47 | try : |
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| 48 | (host, port) = host.split(":") |
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| 49 | port = int(port) |
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| 50 | except ValueError : |
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[2874] | 51 | port = 5432 # Use PostgreSQL's default tcp/ip port (5432). |
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[1021] | 52 | |
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[2418] | 53 | self.tool.logdebug("Trying to open database (host=%s, port=%s, dbname=%s, user=%s)..." % (host, port, dbname, user)) |
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[2210] | 54 | self.database = pg.connect(host=host, port=port, dbname=dbname, user=user, passwd=passwd) |
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| 55 | self.closed = 0 |
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[2954] | 56 | self.database.query("SET CLIENT_ENCODING TO 'UTF-8';") |
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[2210] | 57 | self.tool.logdebug("Database opened (host=%s, port=%s, dbname=%s, user=%s)" % (host, port, dbname, user)) |
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[1021] | 58 | |
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[1113] | 59 | def close(self) : |
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[1021] | 60 | """Closes the database connection.""" |
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| 61 | if not self.closed : |
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| 62 | self.database.close() |
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| 63 | self.closed = 1 |
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[1130] | 64 | self.tool.logdebug("Database closed.") |
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[1021] | 65 | |
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[1041] | 66 | def beginTransaction(self) : |
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| 67 | """Starts a transaction.""" |
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[2741] | 68 | self.before = time.time() |
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[1041] | 69 | self.database.query("BEGIN;") |
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[1130] | 70 | self.tool.logdebug("Transaction begins...") |
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[1041] | 71 | |
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| 72 | def commitTransaction(self) : |
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| 73 | """Commits a transaction.""" |
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| 74 | self.database.query("COMMIT;") |
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[2741] | 75 | after = time.time() |
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[1130] | 76 | self.tool.logdebug("Transaction committed.") |
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[2741] | 77 | self.tool.logdebug("Transaction duration : %.4f seconds" % (after - self.before)) |
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[1041] | 78 | |
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| 79 | def rollbackTransaction(self) : |
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| 80 | """Rollbacks a transaction.""" |
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| 81 | self.database.query("ROLLBACK;") |
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[2741] | 82 | after = time.time() |
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[1130] | 83 | self.tool.logdebug("Transaction aborted.") |
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[2741] | 84 | self.tool.logdebug("Transaction duration : %.4f seconds" % (after - self.before)) |
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[1041] | 85 | |
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[1717] | 86 | def doRawSearch(self, query) : |
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| 87 | """Does a raw search query.""" |
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[1021] | 88 | query = query.strip() |
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| 89 | if not query.endswith(';') : |
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| 90 | query += ';' |
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| 91 | try : |
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[2741] | 92 | before = time.time() |
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[1130] | 93 | self.tool.logdebug("QUERY : %s" % query) |
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[1021] | 94 | result = self.database.query(query) |
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[2031] | 95 | except PGError, msg : |
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[2033] | 96 | raise PyKotaStorageError, str(msg) |
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[1021] | 97 | else : |
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[2741] | 98 | after = time.time() |
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| 99 | self.tool.logdebug("Query Duration : %.4f seconds" % (after - before)) |
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[1717] | 100 | return result |
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[1041] | 101 | |
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[1717] | 102 | def doSearch(self, query) : |
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| 103 | """Does a search query.""" |
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| 104 | result = self.doRawSearch(query) |
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| 105 | if (result is not None) and (result.ntuples() > 0) : |
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| 106 | return result.dictresult() |
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| 107 | |
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[1041] | 108 | def doModify(self, query) : |
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| 109 | """Does a (possibly multiple) modify query.""" |
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| 110 | query = query.strip() |
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| 111 | if not query.endswith(';') : |
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| 112 | query += ';' |
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| 113 | try : |
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[2741] | 114 | before = time.time() |
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[1130] | 115 | self.tool.logdebug("QUERY : %s" % query) |
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[1041] | 116 | result = self.database.query(query) |
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[2031] | 117 | except PGError, msg : |
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[2773] | 118 | self.tool.logdebug("Query failed : %s" % repr(msg)) |
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[2033] | 119 | raise PyKotaStorageError, str(msg) |
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[1068] | 120 | else : |
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[2741] | 121 | after = time.time() |
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| 122 | self.tool.logdebug("Query Duration : %.4f seconds" % (after - before)) |
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[1068] | 123 | return result |
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[1041] | 124 | |
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[1021] | 125 | def doQuote(self, field) : |
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| 126 | """Quotes a field for use as a string in SQL queries.""" |
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| 127 | if type(field) == type(0.0) : |
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| 128 | typ = "decimal" |
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| 129 | elif type(field) == type(0) : |
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| 130 | typ = "int" |
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[1520] | 131 | elif type(field) == type(0L) : |
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| 132 | typ = "int" |
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[1021] | 133 | else : |
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| 134 | typ = "text" |
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| 135 | return pg._quote(field, typ) |
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[2593] | 136 | |
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| 137 | def prepareRawResult(self, result) : |
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| 138 | """Prepares a raw result by including the headers.""" |
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| 139 | if result.ntuples() > 0 : |
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| 140 | entries = [result.listfields()] |
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| 141 | entries.extend(result.getresult()) |
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| 142 | nbfields = len(entries[0]) |
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| 143 | for i in range(1, len(entries)) : |
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| 144 | fields = list(entries[i]) |
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| 145 | for j in range(nbfields) : |
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| 146 | field = fields[j] |
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| 147 | if type(field) == StringType : |
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| 148 | fields[j] = self.databaseToUserCharset(field) |
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| 149 | entries[i] = tuple(fields) |
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| 150 | return entries |
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| 151 | |
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