heat.engine.parameter_groups

Source code for heat.engine.parameter_groups

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from oslo_log import log as logging

from heat.common import exception
from heat.common.i18n import _

LOG = logging.getLogger(__name__)

PARAMETER_GROUPS = 'parameter_groups'
PARAMETERS = 'parameters'


[docs]class ParameterGroups(object): """The ParameterGroups specified by the stack's template.""" def __init__(self, tmpl): self.tmpl = tmpl self.parameters = tmpl.parameters(None, {}, param_defaults={}) self.parameter_names = [] if self.parameters: self.parameter_names = [param for param in self.parameters] self.parameter_groups = tmpl.get(PARAMETER_GROUPS)
[docs] def validate(self): """Validate the parameter group. Validate that each parameter belongs to only one Parameter Group and that each parameter name in the group references a valid parameter. """ LOG.debug('Validating Parameter Groups: %s', ', '.join(self.parameter_names)) if self.parameter_groups: if not isinstance(self.parameter_groups, list): raise exception.StackValidationFailed( error=_('Parameter Groups error'), path=[PARAMETER_GROUPS], message=_('The %s should be a list.') % PARAMETER_GROUPS) # Loop through groups and validate parameters grouped_parameters = [] for group in self.parameter_groups: parameters = group.get(PARAMETERS) if parameters is None: raise exception.StackValidationFailed( error=_('Parameter Groups error'), path=[PARAMETER_GROUPS, group.get('label', '')], message=_('The %s must be provided for ' 'each parameter group.') % PARAMETERS) if not isinstance(parameters, list): raise exception.StackValidationFailed( error=_('Parameter Groups error'), path=[PARAMETER_GROUPS, group.get('label', '')], message=_('The %s of parameter group ' 'should be a list.') % PARAMETERS) for param in parameters: # Check if param has been added to a previous group if param in grouped_parameters: raise exception.StackValidationFailed( error=_('Parameter Groups error'), path=[PARAMETER_GROUPS, group.get('label', '')], message=_( 'The %s parameter must be assigned to one ' 'parameter group only.') % param) else: grouped_parameters.append(param) # Check that grouped parameter references a valid Parameter if param not in self.parameter_names: raise exception.StackValidationFailed( error=_('Parameter Groups error'), path=[PARAMETER_GROUPS, group.get('label', '')], message=_( 'The grouped parameter %s does not reference ' 'a valid parameter.') % param)
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