Added a module for intrinsic function.
Curenntly only handles get_ref_property specified in interface operation input. Renamed ntype to node_type. Change-Id: I4d95b28faba9b55a5d16b9f16dbe36bd3bcd5b4d Implements: blueprint tosca-ref-property
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Idan Moyal
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@ -49,3 +49,5 @@ ChangeLog
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# Editors
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*~
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.*.swp
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.idea
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*.iml
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@ -14,6 +14,7 @@
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# under the License.
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from translator.toscalib.elements.statefulentitytype import StatefulEntityType
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from translator.toscalib.functions import get_function
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SECTIONS = (LIFECYCLE, CONFIGURE) = \
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('tosca.interfaces.node.Lifecycle',
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@ -23,17 +24,17 @@ SECTIONS = (LIFECYCLE, CONFIGURE) = \
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class InterfacesDef(StatefulEntityType):
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'''TOSCA built-in interfaces type.'''
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def __init__(self, ntype, interfacetype,
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tpl_name=None, name=None, value=None):
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self.nodetype = ntype
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self.tpl_name = tpl_name
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def __init__(self, node_type, interfacetype,
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node_template=None, name=None, value=None):
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self.ntype = node_type
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self.node_template = node_template
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self.type = interfacetype
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self.name = name
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self.value = value
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self.implementation = None
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self.input = None
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self.defs = {}
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if ntype:
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if node_type:
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self.defs = self.TOSCA_DEF[interfacetype]
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if value:
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if isinstance(self.value, dict):
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@ -41,10 +42,19 @@ class InterfacesDef(StatefulEntityType):
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if i == 'implementation':
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self.implementation = j
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if i == 'input':
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self.input = j
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self.input = self._create_input_functions(j)
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else:
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self.implementation = value
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def _create_input_functions(self, raw_input):
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"""Creates input functions if necessary.
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:param raw_input: Raw input as dict.
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:return: Modified input dict containing template functions.
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:rtype: dict
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"""
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return dict((k, get_function(self.node_template, v))
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for (k, v) in raw_input.items())
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@property
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def lifecycle_ops(self):
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if self.defs:
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111
translator/toscalib/functions.py
Normal file
111
translator/toscalib/functions.py
Normal file
@ -0,0 +1,111 @@
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import abc
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GET_PROPERTY = 'get_property'
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GET_REF_PROPERTY = 'get_ref_property'
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class Function(object):
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"""An abstract type for representing a Tosca template function."""
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__metaclass__ = abc.ABCMeta
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def __init__(self, node_template, func_name, args):
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self.node_template = node_template
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self.name = func_name
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self.args = args
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self.validate()
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@abc.abstractmethod
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def result(self):
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"""Invokes the function and returns its result
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Some methods invocation may only be relevant on runtime (for example,
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getting runtime properties) and therefore its the responsibility of
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the orchestrator/translator to take care of such functions invocation.
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:return: Function invocation result.
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"""
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return {self.name: self.args}
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def validate(self):
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"""Validates function arguments."""
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class GetRefProperty(Function):
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"""Get a property via a reference expressed in the requirements section.
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Arguments:
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- Requirement name.
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- Capability name.
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- Property to get.
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Example:
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get_ref_property: [ database_endpoint, database_endpoint, port ]
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"""
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def validate(self):
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if len(self.args) != 3:
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raise ValueError(
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'Expected arguments: requirement, capability, property')
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def result(self):
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requires = self.node_template.requirements
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name = None
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if requires:
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requirement = self.args[0]
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for r in requires:
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for cap, node in r.items():
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if cap == requirement:
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name = node
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break
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if name:
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from translator.toscalib.nodetemplate import NodeTemplate
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tpl = NodeTemplate(
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name, self.node_template.node_templates)
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caps = tpl.capabilities
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required_cap = self.args[1]
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required_property = self.args[2]
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for c in caps:
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if c.name == required_cap:
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return c.properties.get(required_property)
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function_mappings = {
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GET_REF_PROPERTY: GetRefProperty
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}
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def get_function(node_template, raw_function):
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"""Gets a Function instance representing the provided template function.
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If the format provided raw_function format is not relevant for template
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functions or if the function name doesn't exist in function mapping the
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method returns the provided raw_function.
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:param node_template: The node template the function is specified for.
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:param raw_function: The raw function as dict.
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:return: Template function as Function instance or the raw_function if
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parsing was unsuccessful.
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"""
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if isinstance(raw_function, dict) and len(raw_function) == 1:
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func_name = list(raw_function.keys())[0]
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if func_name in function_mappings:
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func = function_mappings[func_name]
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func_args = list(raw_function.values())[0]
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return func(node_template, func_name, func_args)
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return raw_function
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@ -78,14 +78,17 @@ class NodeTemplate(object):
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@property
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def interfaces(self):
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interfaces = []
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ifaces = self.node_type.get_value(INTERFACES, self.node_template)
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if ifaces:
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for i in ifaces:
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for name, value in ifaces.items():
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for ops, val in value.items():
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iface = InterfacesDef(None, name, self.name,
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ops, val)
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interfaces.append(iface)
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type_interfaces = self.node_type.get_value(INTERFACES,
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self.node_template)
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if type_interfaces:
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for interface_type, value in type_interfaces.items():
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for op, op_def in value.items():
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iface = InterfacesDef(self.node_type,
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interfacetype=interface_type,
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node_template=self,
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name=op,
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value=op_def)
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interfaces.append(iface)
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return interfaces
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@property
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@ -14,6 +14,7 @@
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# under the License.
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import os
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from translator.toscalib.functions import GetRefProperty
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from translator.toscalib.tests.base import TestCase
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from translator.toscalib.tosca_template import ToscaTemplate
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@ -104,3 +105,36 @@ class ToscaTemplateTest(TestCase):
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self.assertEqual(
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['website_url'],
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sorted([output.name for output in self.tosca.outputs]))
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def test_interfaces(self):
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wordpress_node = [
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node for node in self.tosca.nodetemplates
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if node.name == 'wordpress'][0]
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interfaces = wordpress_node.interfaces
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self.assertEqual(2, len(interfaces))
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for interface in interfaces:
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if interface.name == 'create':
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self.assertEqual('tosca.interfaces.node.Lifecycle',
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interface.type)
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self.assertEqual('wordpress_install.sh',
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interface.implementation)
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self.assertIsNone(interface.input)
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elif interface.name == 'configure':
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self.assertEqual('tosca.interfaces.node.Lifecycle',
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interface.type)
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self.assertEqual('wordpress_configure.sh',
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interface.implementation)
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self.assertEqual(4, len(interface.input))
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wp_db_port = interface.input['wp_db_port']
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self.assertTrue(isinstance(wp_db_port, GetRefProperty))
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self.assertEqual('get_ref_property', wp_db_port.name)
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self.assertEqual(['database_endpoint',
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'database_endpoint',
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'port'],
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wp_db_port.args)
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result = wp_db_port.result()
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self.assertEqual(1, len(result))
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self.assertEqual('db_port', result['get_input'])
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else:
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raise AssertionError(
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'Unexpected interface: {0}'.format(interface.name))
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