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# Copyright (c) 2006-2009 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
class ParameterGroup(dict):
def __init__(self, connection=None):
dict.__init__(self)
self.connection = connection
self.name = None
self.description = None
self.engine = None
self._current_param = None
def __repr__(self):
return 'ParameterGroup:%s' % self.name
def startElement(self, name, attrs, connection):
if name == 'Parameter':
if self._current_param:
self[self._current_param.name] = self._current_param
self._current_param = Parameter(self)
return self._current_param
def endElement(self, name, value, connection):
if name == 'DBParameterGroupName':
self.name = value
elif name == 'Description':
self.description = value
elif name == 'Engine':
self.engine = value
else:
setattr(self, name, value)
def modifiable(self):
mod = []
for key in self:
p = self[key]
if p.is_modifiable:
mod.append(p)
return mod
def get_params(self):
pg = self.connection.get_all_dbparameters(self.name)
self.update(pg)
def add_param(self, name, value, apply_method):
param = Parameter()
param.name = name
param.value = value
param.apply_method = apply_method
self.params.append(param)
class Parameter(object):
"""
Represents a RDS Parameter
"""
ValidTypes = {'integer' : int,
'string' : str,
'boolean' : bool}
ValidSources = ['user', 'system', 'engine-default']
ValidApplyTypes = ['static', 'dynamic']
ValidApplyMethods = ['immediate', 'pending-reboot']
def __init__(self, group=None, name=None):
self.group = group
self.name = name
self._value = None
self.type = str
self.source = None
self.is_modifiable = True
self.description = None
self.apply_method = None
self.allowed_values = None
def __repr__(self):
return 'Parameter:%s' % self.name
def startElement(self, name, attrs, connection):
pass
def endElement(self, name, value, connection):
if name == 'ParameterName':
self.name = value
elif name == 'ParameterValue':
self._value = value
elif name == 'DataType':
if value in self.ValidTypes:
self.type = value
elif name == 'Source':
if value in self.ValidSources:
self.source = value
elif name == 'IsModifiable':
if value.lower() == 'true':
self.is_modifiable = True
else:
self.is_modifiable = False
elif name == 'Description':
self.description = value
elif name == 'ApplyType':
if value in self.ValidApplyTypes:
self.apply_type = value
elif name == 'AllowedValues':
self.allowed_values = value
else:
setattr(self, name, value)
def merge(self, d, i):
prefix = 'Parameters.member.%d.' % i
if self.name:
d[prefix+'ParameterName'] = self.name
if self._value:
d[prefix+'ParameterValue'] = self._value
if self.apply_type:
d[prefix+'ApplyMethod'] = self.apply_method
def _set_string_value(self, value):
if not isinstance(value, str) or isinstance(value, unicode):
raise ValueError, 'value must be of type str'
if self.allowed_values:
choices = self.allowed_values.split(',')
if value not in choices:
raise ValueError, 'value must be in %s' % self.allowed_values
self._value = value
def _set_integer_value(self, value):
if isinstance(value, str) or isinstance(value, unicode):
value = int(value)
if isinstance(value, int) or isinstance(value, long):
if self.allowed_values:
min, max = self.allowed_values.split('-')
if value < int(min) or value > int(max):
raise ValueError, 'range is %s' % self.allowed_values
self._value = value
else:
raise ValueError, 'value must be integer'
def _set_boolean_value(self, value):
if isinstance(value, bool):
self._value = value
elif isinstance(value, str) or isinstance(value, unicode):
if value.lower() == 'true':
self._value = True
else:
self._value = False
else:
raise ValueError, 'value must be boolean'
def set_value(self, value):
if self.type == 'string':
self._set_string_value(value)
elif self.type == 'integer':
self._set_integer_value(value)
elif self.type == 'boolean':
self._set_boolean_value(value)
else:
raise TypeError, 'unknown type (%s)' % self.type
def get_value(self):
if self._value == None:
return self._value
if self.type == 'string':
return self._value
elif self.type == 'integer':
if not isinstance(self._value, int) and not isinstance(self._value, long):
self._set_integer_value(self._value)
return self._value
elif self.type == 'boolean':
if not isinstance(self._value, bool):
self._set_boolean_value(self._value)
return self._value
else:
raise TypeError, 'unknown type (%s)' % self.type
value = property(get_value, set_value, 'The value of the parameter')
def apply(self, immediate=False):
if immediate:
self.apply_method = 'immediate'
else:
self.apply_method = 'pending-reboot'
self.group.connection.modify_parameter_group(self.group.name, [self])
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