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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
'''
TOSCA exception classes
'''
import logging
import sys
import traceback
from toscaparser.utils.gettextutils import _
log = logging.getLogger(__name__)
class TOSCAException(Exception):
'''Base exception class for TOSCA
To correctly use this class, inherit from it and define
a 'msg_fmt' property.
'''
_FATAL_EXCEPTION_FORMAT_ERRORS = False
message = _('An unknown exception occurred.')
def __init__(self, **kwargs):
try:
self.message = self.msg_fmt % kwargs
except KeyError:
exc_info = sys.exc_info()
log.exception(_('Exception in string format operation: %s')
% exc_info[1])
if TOSCAException._FATAL_EXCEPTION_FORMAT_ERRORS:
raise exc_info[0]
def __str__(self):
return self.message
@staticmethod
def set_fatal_format_exception(flag):
if isinstance(flag, bool):
TOSCAException._FATAL_EXCEPTION_FORMAT_ERRORS = flag
class MissingRequiredFieldError(TOSCAException):
msg_fmt = _('%(what)s is missing required field "%(required)s".')
class UnknownFieldError(TOSCAException):
msg_fmt = _('%(what)s contains unknown field "%(field)s". Refer to the '
'definition to verify valid values.')
class TypeMismatchError(TOSCAException):
msg_fmt = _('%(what)s must be of type "%(type)s".')
class InvalidNodeTypeError(TOSCAException):
msg_fmt = _('Node type "%(what)s" is not a valid type.')
class InvalidTypeError(TOSCAException):
msg_fmt = _('Type "%(what)s" is not a valid type.')
class InvalidSchemaError(TOSCAException):
msg_fmt = _('%(message)s')
class ValidationError(TOSCAException):
msg_fmt = _('%(message)s')
class UnknownInputError(TOSCAException):
msg_fmt = _('Unknown input "%(input_name)s".')
class InvalidPropertyValueError(TOSCAException):
msg_fmt = _('Value of property "%(what)s" is invalid.')
class InvalidTemplateVersion(TOSCAException):
msg_fmt = _('The template version "%(what)s" is invalid. '
'Valid versions are "%(valid_versions)s".')
class InvalidTOSCAVersionPropertyException(TOSCAException):
msg_fmt = _('Value of TOSCA version property "%(what)s" is invalid.')
class URLException(TOSCAException):
msg_fmt = _('%(what)s')
class ExceptionCollector(object):
exceptions = []
collecting = False
@staticmethod
def clear():
del ExceptionCollector.exceptions[:]
@staticmethod
def start():
ExceptionCollector.clear()
ExceptionCollector.collecting = True
@staticmethod
def stop():
ExceptionCollector.collecting = False
@staticmethod
def contains(exception):
for ex in ExceptionCollector.exceptions:
if str(ex) == str(exception):
return True
return False
@staticmethod
def appendException(exception):
if ExceptionCollector.collecting:
if not ExceptionCollector.contains(exception):
exception.trace = traceback.extract_stack()[:-1]
ExceptionCollector.exceptions.append(exception)
else:
raise exception
@staticmethod
def exceptionsCaught():
return len(ExceptionCollector.exceptions) > 0
@staticmethod
def getTraceString(traceList):
traceString = ''
for entry in traceList:
f, l, m, c = entry[0], entry[1], entry[2], entry[3]
traceString += (_('\t\tFile %(file)s, line %(line)s, in '
'%(method)s\n\t\t\t%(call)s\n')
% {'file': f, 'line': l, 'method': m, 'call': c})
return traceString
@staticmethod
def getExceptionReportEntry(exception, full=True):
entry = exception.__class__.__name__ + ': ' + str(exception)
if full:
entry += '\n' + ExceptionCollector.getTraceString(exception.trace)
return entry
@staticmethod
def getExceptions():
return ExceptionCollector.exceptions
@staticmethod
def getExceptionsReport(full=True):
report = []
for exception in ExceptionCollector.exceptions:
report.append(
ExceptionCollector.getExceptionReportEntry(exception, full))
return report
@staticmethod
def assertExceptionMessage(exception, message):
err_msg = exception.__name__ + ': ' + message
report = ExceptionCollector.getExceptionsReport(False)
assert err_msg in report, (_('Could not find "%(msg)s" in "%(rep)s".')
% {'rep': report.__str__(), 'msg': err_msg})
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