def __init__(self, name, template, entity_name, custom_def=None):
self.name = name
self.entity_tpl = template
self.custom_def = custom_def
self._validate_field(self.entity_tpl)
if entity_name == 'node_type':
self.type_definition = NodeType(self.entity_tpl['type'],
custom_def)
if entity_name == 'relationship_type':
relationship = template.get('relationship')
type = None
if relationship and isinstance(relationship, dict):
type = relationship.get('type')
elif isinstance(relationship, str):
type = self.entity_tpl['relationship']
else:
type = self.entity_tpl['type']
self.type_definition = RelationshipType(type,
None, custom_def)
self._properties = None
self._interfaces = None
self._requirements = None
self._capabilities = None
class EntityTemplate(object):
'''Base class for TOSCA templates.'''
SECTIONS = (DERIVED_FROM, PROPERTIES, REQUIREMENTS,
INTERFACES, CAPABILITIES, TYPE) = \
('derived_from', 'properties', 'requirements', 'interfaces',
'capabilities', 'type')
def __init__(self, name, template, entity_name, custom_def=None):
self.name = name
self.entity_tpl = template
self.custom_def = custom_def
self._validate_field(self.entity_tpl)
if entity_name == 'node_type':
self.type_definition = NodeType(self.entity_tpl['type'],
custom_def)
if entity_name == 'relationship_type':
relationship = template.get('relationship')
type = None
if relationship and isinstance(relationship, dict):
type = relationship.get('type')
elif isinstance(relationship, str):
type = self.entity_tpl['relationship']
else:
type = self.entity_tpl['type']
self.type_definition = RelationshipType(type,
None, custom_def)
self._properties = None
self._interfaces = None
self._requirements = None
self._capabilities = None
@property
def type(self):
return self.type_definition.type
@property
def requirements(self):
if self._requirements is None:
self._requirements = self.type_definition.get_value(
self.REQUIREMENTS,
self.entity_tpl) or []
return self._requirements
def get_properties_objects(self):
'''Return properties objects for this template.'''
if self._properties is None:
self._properties = self._create_properties()
return self._properties
def get_properties(self):
'''Return a dictionary of property name-object pairs.'''
return {prop.name: prop
for prop in self.get_properties_objects()}
def get_property_value(self, name):
'''Return the value of a given property name.'''
props = self.get_properties()
if props and name in props.keys():
return props[name].value
@property
def interfaces(self):
if self._interfaces is None:
self._interfaces = self._create_interfaces()
return self._interfaces
def get_capabilities_objects(self):
'''Return capabilities objects for this template.'''
if not self._capabilities:
self._capabilities = self._create_capabilities()
return self._capabilities
def get_capabilities(self):
'''Return a dictionary of capability name-object pairs.'''
return {cap.name: cap
for cap in self.get_capabilities_objects()}
def is_derived_from(self, type_str):
'''Check if object inherits from the given type.
Returns true if this object is derived from 'type_str'.
False otherwise.
'''
if not self.type:
return False
elif self.type == type_str:
return True
elif self.parent_type:
return self.parent_type.is_derived_from(type_str)
else:
return False
def _create_capabilities(self):
capability = []
caps = self.type_definition.get_value(self.CAPABILITIES,
self.entity_tpl)
if caps:
for name, props in caps.items():
capabilities = self.type_definition.get_capabilities()
if name in capabilities.keys():
c = capabilities[name]
cap = Capability(name, props['properties'], c)
capability.append(cap)
return capability
def _validate_properties(self, template, entitytype):
properties = entitytype.get_value(self.PROPERTIES, template)
self._common_validate_properties(entitytype, properties)
def _validate_capabilities(self):
type_capabilities = self.type_definition.get_capabilities()
allowed_caps = \
type_capabilities.keys() if type_capabilities else []
capabilities = self.type_definition.get_value(self.CAPABILITIES,
self.entity_tpl)
if capabilities:
self._common_validate_field(capabilities, allowed_caps,
'Capabilities')
self._validate_capabilities_properties(capabilities)
def _validate_capabilities_properties(self, capabilities):
for cap, props in capabilities.items():
capabilitydef = self.get_capability(cap).definition
self._common_validate_properties(capabilitydef,
props[self.PROPERTIES])
# validating capability properties values
for prop in self.get_capability(cap).get_properties_objects():
prop.validate()
# TODO(srinivas_tadepalli): temporary work around to validate
# default_instances until standardized in specification
if cap == "scalable" and prop.name == "default_instances":
prop_dict = props[self.PROPERTIES]
min_instances = prop_dict.get("min_instances")
max_instances = prop_dict.get("max_instances")
default_instances = prop_dict.get("default_instances")
if not (min_instances <= default_instances
<= max_instances):
err_msg = ("Properties of template %s : "
"default_instances value is not"
" between min_instances and "
"max_instances" % self.name)
raise ValidationError(message=err_msg)
def _common_validate_properties(self, entitytype, properties):
allowed_props = []
required_props = []
for p in entitytype.get_properties_def_objects():
allowed_props.append(p.name)
if p.required:
required_props.append(p.name)
if properties:
self._common_validate_field(properties, allowed_props,
'Properties')
# make sure it's not missing any property required by a tosca type
missingprop = []
for r in required_props:
if r not in properties.keys():
missingprop.append(r)
if missingprop:
raise MissingRequiredFieldError(
what='Properties of template %s' % self.name,
required=missingprop)
else:
if required_props:
raise MissingRequiredFieldError(
what='Properties of template %s' % self.name,
required=missingprop)
def _validate_field(self, template):
if not isinstance(template, dict):
raise MissingRequiredFieldError(
what='Template %s' % self.name, required=self.TYPE)
try:
relationship = template.get('relationship')
if relationship and not isinstance(relationship, str):
relationship[self.TYPE]
elif isinstance(relationship, str):
template['relationship']
else:
template[self.TYPE]
except KeyError:
raise MissingRequiredFieldError(
what='Template %s' % self.name, required=self.TYPE)
def _common_validate_field(self, schema, allowedlist, section):
for name in schema:
if name not in allowedlist:
raise UnknownFieldError(
what='%(section)s of template %(nodename)s'
% {'section': section, 'nodename': self.name},
field=name)
def _create_properties(self):
props = []
properties = self.type_definition.get_value(self.PROPERTIES,
self.entity_tpl) or {}
for name, value in properties.items():
props_def = self.type_definition.get_properties_def()
if props_def and name in props_def:
prop = Property(name, value,
props_def[name].schema, self.custom_def)
props.append(prop)
for p in self.type_definition.get_properties_def_objects():
if p.default is not None and p.name not in properties.keys():
prop = Property(p.name, p.default, p.schema, self.custom_def)
props.append(prop)
return props
def _create_interfaces(self):
interfaces = []
type_interfaces = None
if isinstance(self.type_definition, RelationshipType):
if isinstance(self.entity_tpl, dict):
for rel_def, value in self.entity_tpl.items():
if rel_def != 'type':
rel_def = self.entity_tpl.get(rel_def)
rel = None
if isinstance(rel_def, dict):
rel = rel_def.get('relationship')
if rel:
if self.INTERFACES in rel:
type_interfaces = rel[self.INTERFACES]
break
else:
type_interfaces = self.type_definition.get_value(self.INTERFACES,
self.entity_tpl)
if type_interfaces:
for interface_type, value in type_interfaces.items():
for op, op_def in value.items():
iface = InterfacesDef(self.type_definition,
interfacetype=interface_type,
node_template=self,
name=op,
value=op_def)
interfaces.append(iface)
return interfaces
def get_capability(self, name):
"""Provide named capability
:param name: name of capability
:return: capability object if found, None otherwise
"""
caps = self.get_capabilities()
if caps and name in caps.keys():
return caps[name]
