root / snf-pithos-backend / pithos / backends / lib / sqlalchemy / quotaholder_serials.py @ e7117103
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1 | 1af183f2 | Sofia Papagiannaki | # Copyright 2011-2012 GRNET S.A. All rights reserved.
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2 | 1af183f2 | Sofia Papagiannaki | #
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3 | 1af183f2 | Sofia Papagiannaki | # Redistribution and use in source and binary forms, with or
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4 | 1af183f2 | Sofia Papagiannaki | # without modification, are permitted provided that the following
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5 | 1af183f2 | Sofia Papagiannaki | # conditions are met:
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6 | 1af183f2 | Sofia Papagiannaki | #
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7 | 1af183f2 | Sofia Papagiannaki | # 1. Redistributions of source code must retain the above
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8 | 1af183f2 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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9 | 1af183f2 | Sofia Papagiannaki | # disclaimer.
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10 | 1af183f2 | Sofia Papagiannaki | #
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11 | 1af183f2 | Sofia Papagiannaki | # 2. Redistributions in binary form must reproduce the above
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12 | 1af183f2 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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13 | 1af183f2 | Sofia Papagiannaki | # disclaimer in the documentation and/or other materials
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14 | 1af183f2 | Sofia Papagiannaki | # provided with the distribution.
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15 | 1af183f2 | Sofia Papagiannaki | #
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16 | 1af183f2 | Sofia Papagiannaki | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 1af183f2 | Sofia Papagiannaki | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 1af183f2 | Sofia Papagiannaki | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 1af183f2 | Sofia Papagiannaki | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 1af183f2 | Sofia Papagiannaki | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 1af183f2 | Sofia Papagiannaki | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 1af183f2 | Sofia Papagiannaki | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 1af183f2 | Sofia Papagiannaki | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 1af183f2 | Sofia Papagiannaki | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 1af183f2 | Sofia Papagiannaki | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 1af183f2 | Sofia Papagiannaki | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 1af183f2 | Sofia Papagiannaki | # POSSIBILITY OF SUCH DAMAGE.
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28 | 1af183f2 | Sofia Papagiannaki | #
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29 | 1af183f2 | Sofia Papagiannaki | # The views and conclusions contained in the software and
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30 | 1af183f2 | Sofia Papagiannaki | # documentation are those of the authors and should not be
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31 | 1af183f2 | Sofia Papagiannaki | # interpreted as representing official policies, either expressed
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32 | 1af183f2 | Sofia Papagiannaki | # or implied, of GRNET S.A.
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33 | 1af183f2 | Sofia Papagiannaki | |
34 | 1af183f2 | Sofia Papagiannaki | from sqlalchemy import Table, Column, MetaData |
35 | 1af183f2 | Sofia Papagiannaki | from sqlalchemy.types import BigInteger |
36 | 1af183f2 | Sofia Papagiannaki | from sqlalchemy.sql import select |
37 | 1af183f2 | Sofia Papagiannaki | from sqlalchemy.exc import NoSuchTableError |
38 | 1af183f2 | Sofia Papagiannaki | |
39 | 1af183f2 | Sofia Papagiannaki | from dbworker import DBWorker |
40 | 1af183f2 | Sofia Papagiannaki | |
41 | 1af183f2 | Sofia Papagiannaki | def create_tables(engine): |
42 | 1af183f2 | Sofia Papagiannaki | metadata = MetaData() |
43 | 1af183f2 | Sofia Papagiannaki | columns = [] |
44 | 1af183f2 | Sofia Papagiannaki | columns.append(Column('serial', BigInteger, primary_key=True)) |
45 | b7faa11e | Sofia Papagiannaki | config = Table('qh_serials', metadata, *columns, mysql_engine='InnoDB') |
46 | 1af183f2 | Sofia Papagiannaki | |
47 | 1af183f2 | Sofia Papagiannaki | metadata.create_all(engine) |
48 | 1af183f2 | Sofia Papagiannaki | return metadata.sorted_tables
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49 | 1af183f2 | Sofia Papagiannaki | |
50 | f75a34ee | Sofia Papagiannaki | class QuotaholderSerial(DBWorker): |
51 | f75a34ee | Sofia Papagiannaki | """QuotaholderSerial keeps track of quota holder serials.
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52 | 1af183f2 | Sofia Papagiannaki | """
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53 | 1af183f2 | Sofia Papagiannaki | |
54 | 1af183f2 | Sofia Papagiannaki | def __init__(self, **params): |
55 | 1af183f2 | Sofia Papagiannaki | DBWorker.__init__(self, **params)
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56 | 1af183f2 | Sofia Papagiannaki | try:
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57 | 1af183f2 | Sofia Papagiannaki | metadata = MetaData(self.engine)
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58 | b7faa11e | Sofia Papagiannaki | self.qh_serials = Table('qh_serials', metadata, autoload=True) |
59 | 1af183f2 | Sofia Papagiannaki | except NoSuchTableError:
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60 | 1af183f2 | Sofia Papagiannaki | tables = create_tables(self.engine)
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61 | 1af183f2 | Sofia Papagiannaki | map(lambda t: self.__setattr__(t.name, t), tables) |
62 | 1af183f2 | Sofia Papagiannaki | |
63 | 1af183f2 | Sofia Papagiannaki | def get_lower(self, serial): |
64 | 1af183f2 | Sofia Papagiannaki | """Return entries lower than serial."""
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65 | 1af183f2 | Sofia Papagiannaki | |
66 | b7faa11e | Sofia Papagiannaki | s = select([self.qh_serials.c.serial])
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67 | b7faa11e | Sofia Papagiannaki | s = s.where(self.qh_serials.c.serial < serial)
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68 | 1af183f2 | Sofia Papagiannaki | r = self.conn.execute(s)
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69 | 1af183f2 | Sofia Papagiannaki | rows = r.fetchall() |
70 | 1af183f2 | Sofia Papagiannaki | r.close() |
71 | 1af183f2 | Sofia Papagiannaki | return rows
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72 | 1af183f2 | Sofia Papagiannaki | |
73 | 1af183f2 | Sofia Papagiannaki | def insert_serial(self, serial): |
74 | 1af183f2 | Sofia Papagiannaki | """Insert a serial.
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75 | 1af183f2 | Sofia Papagiannaki | """
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76 | 1af183f2 | Sofia Papagiannaki | |
77 | b7faa11e | Sofia Papagiannaki | s = self.qh_serials.insert()
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78 | 1af183f2 | Sofia Papagiannaki | r = self.conn.execute(s, serial=serial)
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79 | 1af183f2 | Sofia Papagiannaki | inserted_primary_key = r.inserted_primary_key[0]
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80 | 1af183f2 | Sofia Papagiannaki | r.close() |
81 | 1af183f2 | Sofia Papagiannaki | return inserted_primary_key |