heat.engine.node_data module

class heat.engine.node_data.NodeData(primary_key, resource_name, uuid, reference_id, attributes, action, status)

Bases: object

Data about a node in the graph, to be passed along to other nodes.

action

as_dict()

Return a dict representation of the data.

This is the format that is serialised and stored in the database’s SyncPoints.

attribute(attr_name)

Return the specified attribute value.

attribute_names()

Iterate over valid top-level attribute names.

attributes()

Return a dict of all available top-level attribute values.

classmethod from_dict(node_data)

Create a new NodeData object from deserialised data.

This reads the format that is stored in the database, and is the inverse of as_dict().

name

primary_key

reference_id()

Return the reference ID of the resource.

i.e. the result that the {get_resource: } intrinsic function should return for this resource.

status

uuid

heat.engine.node_data.load_resources_data(data)

Return the data for all of the resources that meet at a SyncPoint.

The input is the input_data dict from a SyncPoint received over RPC. The keys (which are ignored) are resource primary keys.

The output is a dict of NodeData objects with the resource names as the keys.