root / kamaki / clients / commissioning / exception.py @ 2005b18e
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1 | 54069d1b | Stavros Sachtouris | # Copyright 2012 GRNET S.A. All rights reserved.
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2 | 54069d1b | Stavros Sachtouris | #
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3 | 54069d1b | Stavros Sachtouris | # Redistribution and use in source and binary forms, with or
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4 | 54069d1b | Stavros Sachtouris | # without modification, are permitted provided that the following
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5 | 54069d1b | Stavros Sachtouris | # conditions are met:
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6 | 54069d1b | Stavros Sachtouris | #
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7 | 54069d1b | Stavros Sachtouris | # 1. Redistributions of source code must retain the above
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8 | 54069d1b | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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9 | 54069d1b | Stavros Sachtouris | # disclaimer.
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10 | 54069d1b | Stavros Sachtouris | #
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11 | 54069d1b | Stavros Sachtouris | # 2. Redistributions in binary form must reproduce the above
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12 | 54069d1b | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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13 | 54069d1b | Stavros Sachtouris | # disclaimer in the documentation and/or other materials
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14 | 54069d1b | Stavros Sachtouris | # provided with the distribution.
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15 | 54069d1b | Stavros Sachtouris | #
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16 | 54069d1b | Stavros Sachtouris | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 54069d1b | Stavros Sachtouris | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 54069d1b | Stavros Sachtouris | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 54069d1b | Stavros Sachtouris | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 54069d1b | Stavros Sachtouris | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 54069d1b | Stavros Sachtouris | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 54069d1b | Stavros Sachtouris | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 54069d1b | Stavros Sachtouris | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 54069d1b | Stavros Sachtouris | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 54069d1b | Stavros Sachtouris | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 54069d1b | Stavros Sachtouris | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 54069d1b | Stavros Sachtouris | # POSSIBILITY OF SUCH DAMAGE.
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28 | 54069d1b | Stavros Sachtouris | #
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29 | 54069d1b | Stavros Sachtouris | # The views and conclusions contained in the software and
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30 | 54069d1b | Stavros Sachtouris | # documentation are those of the authors and should not be
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31 | 54069d1b | Stavros Sachtouris | # interpreted as representing official policies, either expressed
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32 | 54069d1b | Stavros Sachtouris | # or implied, of GRNET S.A.
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33 | 54069d1b | Stavros Sachtouris | |
34 | 54069d1b | Stavros Sachtouris | |
35 | d1304043 | Stavros Sachtouris | def str_or_utf8(s): |
36 | d1304043 | Stavros Sachtouris | if isinstance(s, unicode): |
37 | d1304043 | Stavros Sachtouris | return s.encode('utf8') |
38 | d1304043 | Stavros Sachtouris | return str(s) |
39 | d1304043 | Stavros Sachtouris | |
40 | d1304043 | Stavros Sachtouris | |
41 | 54069d1b | Stavros Sachtouris | class CallError(Exception): |
42 | 54069d1b | Stavros Sachtouris | exceptions = {} |
43 | 54069d1b | Stavros Sachtouris | |
44 | 54069d1b | Stavros Sachtouris | def __new__(cls, *args, **kw): |
45 | 54069d1b | Stavros Sachtouris | call_error = kw.get('call_error', None) |
46 | 54069d1b | Stavros Sachtouris | if call_error is None: |
47 | 54069d1b | Stavros Sachtouris | call_error = cls.__name__ |
48 | 54069d1b | Stavros Sachtouris | else:
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49 | 54069d1b | Stavros Sachtouris | call_error = str(call_error)
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50 | 54069d1b | Stavros Sachtouris | cls = CallError.exceptions.get(call_error, cls) |
51 | 54069d1b | Stavros Sachtouris | self = Exception.__new__(cls) |
52 | 54069d1b | Stavros Sachtouris | return self |
53 | 54069d1b | Stavros Sachtouris | |
54 | 54069d1b | Stavros Sachtouris | def __init__(self, *args, **kw): |
55 | d1304043 | Stavros Sachtouris | self.call_error = kw.pop('call_error', self.__class__.__name__) |
56 | 54069d1b | Stavros Sachtouris | self.args = args
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57 | d1304043 | Stavros Sachtouris | self.kwargs = kw
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58 | 54069d1b | Stavros Sachtouris | |
59 | 54069d1b | Stavros Sachtouris | def __str__(self): |
60 | d1304043 | Stavros Sachtouris | return '\n--------\n'.join(str_or_utf8(x) for x in self.args) |
61 | 54069d1b | Stavros Sachtouris | |
62 | 54069d1b | Stavros Sachtouris | def __repr__(self): |
63 | 54069d1b | Stavros Sachtouris | return '%s(%s)' % (self.__class__.__name__, |
64 | d1304043 | Stavros Sachtouris | ','.join(str_or_utf8(x) for x in self.args)) |
65 | 54069d1b | Stavros Sachtouris | |
66 | 54069d1b | Stavros Sachtouris | @classmethod
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67 | 54069d1b | Stavros Sachtouris | def from_exception(cls, exc): |
68 | 54069d1b | Stavros Sachtouris | args = None
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69 | 54069d1b | Stavros Sachtouris | try:
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70 | 54069d1b | Stavros Sachtouris | args = tuple(exc.args)
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71 | 6764f588 | Stavros Sachtouris | except (TypeError, AttributeError): |
72 | 54069d1b | Stavros Sachtouris | pass
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73 | 54069d1b | Stavros Sachtouris | |
74 | 54069d1b | Stavros Sachtouris | if args is None: |
75 | 54069d1b | Stavros Sachtouris | args = (str(exc),)
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76 | 54069d1b | Stavros Sachtouris | self = cls(*args, call_error=exc.__class__.__name__)
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77 | 54069d1b | Stavros Sachtouris | return self |
78 | 54069d1b | Stavros Sachtouris | |
79 | 54069d1b | Stavros Sachtouris | def to_dict(self): |
80 | 54069d1b | Stavros Sachtouris | return {'call_error': self.call_error, |
81 | d1304043 | Stavros Sachtouris | 'error_args': (self.args, self.kwargs)} |
82 | 54069d1b | Stavros Sachtouris | |
83 | 54069d1b | Stavros Sachtouris | @classmethod
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84 | 54069d1b | Stavros Sachtouris | def from_dict(cls, dictobj): |
85 | 54069d1b | Stavros Sachtouris | args = None
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86 | 54069d1b | Stavros Sachtouris | try:
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87 | 54069d1b | Stavros Sachtouris | if 'error_args' in dictobj and 'call_error' in dictobj: |
88 | 54069d1b | Stavros Sachtouris | args = dictobj['error_args']
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89 | 54069d1b | Stavros Sachtouris | call_error = dictobj['call_error']
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90 | 6764f588 | Stavros Sachtouris | except TypeError: |
91 | 54069d1b | Stavros Sachtouris | pass
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92 | 54069d1b | Stavros Sachtouris | |
93 | 54069d1b | Stavros Sachtouris | if args is None: |
94 | 54069d1b | Stavros Sachtouris | args = (str(dictobj),)
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95 | 54069d1b | Stavros Sachtouris | call_error = 'UnknownError'
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96 | d1304043 | Stavros Sachtouris | kw = {} |
97 | d1304043 | Stavros Sachtouris | else:
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98 | d1304043 | Stavros Sachtouris | args, kw = args |
99 | 54069d1b | Stavros Sachtouris | |
100 | d1304043 | Stavros Sachtouris | self = cls(*args, call_error=call_error, **kw)
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101 | 54069d1b | Stavros Sachtouris | return self |
102 | 54069d1b | Stavros Sachtouris | |
103 | 6764f588 | Stavros Sachtouris | |
104 | 54069d1b | Stavros Sachtouris | def register_exceptions(*exceptions): |
105 | 54069d1b | Stavros Sachtouris | for exception in exceptions: |
106 | 54069d1b | Stavros Sachtouris | if not issubclass(exception, CallError): |
107 | 6764f588 | Stavros Sachtouris | m = "Registering '%s': is not a CallError subclass" % (exception,)
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108 | 54069d1b | Stavros Sachtouris | raise ValueError(m) |
109 | 54069d1b | Stavros Sachtouris | CallError.exceptions[exception.__name__] = exception |
110 | 54069d1b | Stavros Sachtouris | |
111 | 6764f588 | Stavros Sachtouris | |
112 | 54069d1b | Stavros Sachtouris | def register_exception(exc): |
113 | 54069d1b | Stavros Sachtouris | register_exceptions(exc) |
114 | 54069d1b | Stavros Sachtouris | return exc
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115 | 54069d1b | Stavros Sachtouris | |
116 | 6764f588 | Stavros Sachtouris | |
117 | 54069d1b | Stavros Sachtouris | @register_exception
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118 | 54069d1b | Stavros Sachtouris | class CorruptedError(CallError): |
119 | 54069d1b | Stavros Sachtouris | pass
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120 | 54069d1b | Stavros Sachtouris | |
121 | 6764f588 | Stavros Sachtouris | |
122 | 54069d1b | Stavros Sachtouris | @register_exception
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123 | 54069d1b | Stavros Sachtouris | class InvalidDataError(CallError): |
124 | 54069d1b | Stavros Sachtouris | pass
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125 | 54069d1b | Stavros Sachtouris | |
126 | 6764f588 | Stavros Sachtouris | |
127 | 54069d1b | Stavros Sachtouris | class ReturnButFail(Exception): |
128 | 54069d1b | Stavros Sachtouris | def __init__(self, retval=None): |
129 | 54069d1b | Stavros Sachtouris | self.data = retval |