root / snf-pithos-backend / pithos / backends / lib / sqlalchemy / dbworker.py @ dc7159be
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1 | 2e662088 | Antony Chazapis | # Copyright 2011-2012 GRNET S.A. All rights reserved.
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2 | 2715ade4 | Sofia Papagiannaki | #
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3 | 4f917833 | Sofia Papagiannaki | # Redistribution and use in source and binary forms, with or
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4 | 4f917833 | Sofia Papagiannaki | # without modification, are permitted provided that the following
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5 | 4f917833 | Sofia Papagiannaki | # conditions are met:
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6 | 2715ade4 | Sofia Papagiannaki | #
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7 | 4f917833 | Sofia Papagiannaki | # 1. Redistributions of source code must retain the above
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8 | 4f917833 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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9 | 4f917833 | Sofia Papagiannaki | # disclaimer.
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10 | 2715ade4 | Sofia Papagiannaki | #
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11 | 4f917833 | Sofia Papagiannaki | # 2. Redistributions in binary form must reproduce the above
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12 | 4f917833 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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13 | 4f917833 | Sofia Papagiannaki | # disclaimer in the documentation and/or other materials
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14 | 4f917833 | Sofia Papagiannaki | # provided with the distribution.
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15 | 2715ade4 | Sofia Papagiannaki | #
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16 | 4f917833 | Sofia Papagiannaki | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 4f917833 | Sofia Papagiannaki | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 4f917833 | Sofia Papagiannaki | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 4f917833 | Sofia Papagiannaki | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 4f917833 | Sofia Papagiannaki | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 4f917833 | Sofia Papagiannaki | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 4f917833 | Sofia Papagiannaki | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 4f917833 | Sofia Papagiannaki | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 4f917833 | Sofia Papagiannaki | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 4f917833 | Sofia Papagiannaki | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 4f917833 | Sofia Papagiannaki | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 4f917833 | Sofia Papagiannaki | # POSSIBILITY OF SUCH DAMAGE.
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28 | 2715ade4 | Sofia Papagiannaki | #
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29 | 4f917833 | Sofia Papagiannaki | # The views and conclusions contained in the software and
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30 | 4f917833 | Sofia Papagiannaki | # documentation are those of the authors and should not be
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31 | 4f917833 | Sofia Papagiannaki | # interpreted as representing official policies, either expressed
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32 | 4f917833 | Sofia Papagiannaki | # or implied, of GRNET S.A.
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33 | 4f917833 | Sofia Papagiannaki | |
34 | 235a4227 | Sofia Papagiannaki | ESCAPE_CHAR = '@'
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35 | 4f917833 | Sofia Papagiannaki | |
36 | 29148653 | Sofia Papagiannaki | |
37 | 4f917833 | Sofia Papagiannaki | class DBWorker(object): |
38 | 4f917833 | Sofia Papagiannaki | """Database connection handler."""
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39 | 2715ade4 | Sofia Papagiannaki | |
40 | 4f917833 | Sofia Papagiannaki | def __init__(self, **params): |
41 | 4f917833 | Sofia Papagiannaki | self.params = params
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42 | 26837206 | Georgios D. Tsoukalas | wrapper = params['wrapper']
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43 | 26837206 | Georgios D. Tsoukalas | self.wrapper = wrapper
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44 | 26837206 | Georgios D. Tsoukalas | self.conn = wrapper.conn
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45 | 26837206 | Georgios D. Tsoukalas | self.engine = wrapper.engine
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46 | 2715ade4 | Sofia Papagiannaki | |
47 | 235a4227 | Sofia Papagiannaki | def escape_like(self, s, escape_char=ESCAPE_CHAR): |
48 | 29148653 | Sofia Papagiannaki | return (s.replace(escape_char, escape_char * 2). |
49 | 29148653 | Sofia Papagiannaki | replace('%', escape_char + '%'). |
50 | 29148653 | Sofia Papagiannaki | replace('_', escape_char + '_')) |