Github user AviaE commented on a diff in the pull request:
https://github.com/apache/incubator-ariatosca/pull/189#discussion_r130828395
--- Diff: aria/orchestrator/topology/topology.py ---
@@ -0,0 +1,217 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+from ...parser.validation import issue
+from ...modeling import models
+from ...utils import console
+from . import (
+ template_handler,
+ instance_handler,
+ common
+)
+
+
+class Topology(issue.Reporter):
+
+ _init_map = {
+ models.ServiceTemplate: models.Service,
+ models.ArtifactTemplate: models.Artifact,
+ models.CapabilityTemplate: models.Capability,
+ models.GroupTemplate: models.Group,
+ models.InterfaceTemplate: models.Interface,
+ models.NodeTemplate: models.Node,
+ models.PolicyTemplate: models.Policy,
+ models.SubstitutionTemplate: models.Substitution,
+ models.RelationshipTemplate: models.Relationship,
+ models.OperationTemplate: models.Operation,
+ models.RequirementTemplate: None,
+ models.SubstitutionTemplateMapping: models.SubstitutionMapping,
+
+ # Common
+ models.Metadata: models.Metadata,
+ models.Attribute: models.Attribute,
+ models.Property: models.Property,
+ models.Input: models.Input,
+ models.Output: models.Output,
+ models.Configuration: models.Configuration,
+ models.Argument: models.Argument,
+ models.Type: models.Type
+ }
+
+ def __init__(self, model_storage=None, *args, **kwargs):
+ # TODO: model storage is required only for the list of plugins,
can we get it
+ # somewhere else?
+ super(Topology, self).__init__(*args, **kwargs)
+ self._model_storage = model_storage
+ self._handlers = dict(self._init_handlers(instance_handler),
+ **self._init_handlers(template_handler))
+
+ @staticmethod
+ def _init_handlers(module_):
+ handlers = {}
+ for attribute_name in dir(module_):
+ if attribute_name.startswith('_'):
+ continue
+ attribute = getattr(module_, attribute_name)
+ if isinstance(attribute, type) and issubclass(attribute,
common._Handler):
+ handlers[getattr(models, attribute_name)] = attribute
+ return handlers
+
+ def instantiate(self, model, **kwargs):
+ """
+ all handlers used by instantiate should hold a tuple as value
(handler, instnace_cls)
+ :param model:
+ :param kwargs:
+ :return:
+ """
+ if isinstance(model, dict):
+ return dict((name, self.instantiate(value, **kwargs))
+ for name, value in model.iteritems())
+ elif isinstance(model, list):
+ return list(self.instantiate(value, **kwargs) for value in
model)
+ elif model is not None:
+ _handler = self._handlers.get(model.__class__)
+ instance_cls = self._init_map.get(model.__class__)
+ return _handler(self, model).instantiate(instance_cls,
**kwargs)
+
+ def validate(self, model, **kwargs):
+ if isinstance(model, dict):
+ return self.validate(model.values())
+ elif isinstance(model, list):
+ return all(self.validate(value) for value in model)
+ elif model is not None:
+ _handler = self._handlers.get(model.__class__)
+ return _handler(self, model).validate(**kwargs)
+
+ def dump(self, model, out_stream=None, section_name=None, **kwargs):
+ out_stream = out_stream or console.TopologyStylizer()
+
+ # if model is empty, no need to print out the section name
+ if model and section_name:
+ out_stream.write('{0}:'.format(section_name))
+
+ if isinstance(model, dict):
+ if str(out_stream):
+ with out_stream.indent():
+ return self.dump(model.values(),
out_stream=out_stream, **kwargs)
+ else:
+ return self.dump(model.values(), out_stream=out_stream,
**kwargs)
+
+ elif isinstance(model, list):
+ for value in model:
+ self.dump(value, out_stream=out_stream, **kwargs)
+
+ elif model is not None:
+ _handler = self._handlers.get(model.__class__)
+ _handler(self, model).dump(out_stream=out_stream, **kwargs)
+
+ return out_stream
+
+ def dump_graph(self, service, **kwargs):
+ out_stream = console.TopologyStylizer()
+ for node in service.nodes.itervalues():
+ if not node.inbound_relationships:
+ self._dump_graph_node(out_stream, node)
+ return out_stream
+
+ def _dump_graph_node(self, out_stream, node, capability=None):
+ out_stream.write(out_stream.node(node.name))
+ if capability is not None:
+ out_stream.write('{0}
({1})'.format(out_stream.property(capability.name),
+
out_stream.type(capability.type.name)))
+ if node.outbound_relationships:
+ with out_stream.indent():
+ for relationship_model in node.outbound_relationships:
+ relationship_name =
out_stream.property(relationship_model.name)
+ if relationship_model.type is not None:
+ out_stream.write('-> {0} ({1})'.format(
+ relationship_name,
out_stream.type(relationship_model.type.name)))
+ else:
+ out_stream.write('->
{0}'.format(relationship_name))
+ with out_stream.indent(3):
+ self._dump_graph_node(out_stream,
+
relationship_model.target_node,
+
relationship_model.target_capability)
+
+ def coerce(self, model, **kwargs):
+ if isinstance(model, dict):
+ return self.validate(model.values())
+ elif isinstance(model, list):
+ return all(self.validate(value) for value in model)
+ elif model is not None:
+ _handler = self._handlers.get(model.__class__)
+ return _handler(self, model).coerce(**kwargs)
+
+ def dump_types(self, service_template, out_stream=None):
+ out_stream = out_stream or console.TopologyStylizer()
+ self.dump(service_template.node_types, out_stream, 'Node types')
+ self.dump(service_template.group_types, out_stream, 'Group types')
+ self.dump(service_template.capability_types, out_stream,
'Capability types')
+ self.dump(service_template.relationship_types, out_stream,
'Relationship types')
+ self.dump(service_template.policy_types, out_stream, 'Policy
types')
+ self.dump(service_template.artifact_types, out_stream, 'Artifact
types')
+ self.dump(service_template.interface_types, out_stream, 'Interface
types')
+
+ return str(out_stream)
+
+ def satisfy_requirements(self, model, **kwargs):
+ if isinstance(model, dict):
+ return self.satisfy_requirements(model.values())
+ elif isinstance(model, list):
+ return all(self.satisfy_requirements(value) for value in model)
+ elif model is not None:
+ _handler = self._handlers.get(model.__class__)
+ return _handler(self, model).satisfy_requirements(**kwargs)
+
+ def validate_capabilities(self, model, **kwargs):
+ if isinstance(model, dict):
+ return self.validate_capabilities(model.values())
+ elif isinstance(model, list):
+ return all(self.validate_capabilities(value) for value in
model)
+ elif model is not None:
+ _handler = self._handlers.get(model.__class__)
+ return _handler(self, model).validate_capabilities(**kwargs)
+
+ def _find_host(self, node):
+ if node.type.role == 'host':
+ return node
+
+ has_role = lambda rel, role: \
--- End diff --
name it `target_has_role`.
And consider making it into `def`.
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