Github user tliron commented on a diff in the pull request: https://github.com/apache/incubator-ariatosca/pull/143#discussion_r126353859 --- Diff: aria/modeling/service_template.py --- @@ -690,19 +666,104 @@ def dump(self): console.puts(context.style.meta(self.description)) with context.style.indent: console.puts('Type: {0}'.format(context.style.type(self.type.name))) - console.puts('Instances: {0:d} ({1:d}{2})'.format( - self.default_instances, - self.min_instances, - ' to {0:d}'.format(self.max_instances) - if self.max_instances is not None - else ' or more')) utils.dump_dict_values(self.properties, 'Properties') utils.dump_dict_values(self.attributes, 'Attributes') utils.dump_interfaces(self.interface_templates) utils.dump_dict_values(self.artifact_templates, 'Artifact templates') utils.dump_dict_values(self.capability_templates, 'Capability templates') utils.dump_list_values(self.requirement_templates, 'Requirement templates') + @property + def next_index(self): + """ + Next available node index. + + :returns: node index + :rtype: int + """ + + max_index = 0 + if self.nodes: + max_index = max(int(n.name.rsplit('_', 1)[-1]) for n in self.nodes) + return max_index + 1 + + @property + def next_name(self): + """ + Next available node name. + + :returns: node name + :rtype: basestring + """ + + return '{name}_{index}'.format(name=self.name, index=self.next_index) + + @property + def scaling(self): + scaling = {} + + def extract_property(properties, name): + if name in scaling: + return + prop = properties.get(name) + if (prop is not None) and (prop.type_name == 'integer') and (prop.value is not None): + scaling[name] = prop.value + + def extract_properties(properties): + extract_property(properties, 'min_instances') + extract_property(properties, 'max_instances') + extract_property(properties, 'default_instances') + + def default_property(name, value): + if name not in scaling: + scaling[name] = value + + # From our scaling capabilities + for capability_template in self.capability_templates.itervalues(): + if capability_template.type.role == 'scaling': + extract_properties(capability_template.properties) + + # From service scaling policies + for policy_template in self.service_template.policy_templates.itervalues(): + if policy_template.type.role == 'scaling': + if policy_template.is_for_node_template(self.name): + extract_properties(policy_template.properties) + + # Defaults + default_property('min_instances', 0) + default_property('max_instances', 1) + default_property('default_instances', 1) + + # Validate + # pylint: disable=too-many-boolean-expressions + if (scaling['min_instances'] < 0) or \ --- End diff -- I see no difference in readability between this and using `or`, seems to me just to be bowing to PyLint's weirdness... but I don't mind switching.
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