The heat.engine.function Module

class heat.engine.function.Function(stack, fn_name, args)

Bases: object

Abstract base class for template functions.

dep_attrs(resource_name)

Return the attributes of the specified resource that are referenced.

Return an iterator over any attributes of the specified resource that this function references.

dependencies(path)

result()

Return the result of resolving the function.

Function subclasses must override this method to calculate their results.

stack

validate()

Validate arguments without resolving the function.

Function subclasses must override this method to validate their args.

heat.engine.function.dep_attrs(snippet, resource_name)

Iterator over dependent attrs of a resource in a template snippet.

The snippet should be already parsed to insert Function objects where appropriate.

Returns:an iterator over the attributes of the specified resource that

are referenced in the template snippet.

heat.engine.function.dependencies(snippet, path='')

Return an iterator over Resource dependencies in a template snippet.

The snippet should be already parsed to insert Function objects where appropriate.

heat.engine.function.resolve(snippet)

heat.engine.function.validate(snippet)