Houdini 21.0 Executing tasks with PDG/TOPs pdgd

pdgd.DataBackend class

A DataBackend is responsible for storing and querying PDGD data.

Methods ¶

Instance methods ¶

getDataLayerInterface()

Returns the data layer interface currently using this DataBackend

buildFilteredSet(initial_set, query_definition, data_layer_interface) → set

Returns a filtered version of initial_set, this is a basic brute force approach, custom backend implementations can overwrite this in order to\ levarage the chosen storage strategy.

Returns a filtered version of initial_set, this is a basic brute force approach, custom backend implementations can overwrite this in order to\ levarage the chosen storage strategy.

pdgd

Data Layer Components ¶

pdgd.AppendValuesMessage

A message for adding values to a property.
pdgd.DataBackend

A DataBackend is responsible for storing and querying PDGD data.
pdgd.DataLayerInterface

A DataLayerInterface provides access to PDG data
pdgd.DataLayerServer

A DataLayerServer allows external connections to a data layer interface
pdgd.DataLayerVisualizer

Visualizers are used to subscribe to data layer interface’s objects
pdgd.Message

A Message communicates how a pdg object’s data has changes.
pdgd.ObjectProperty

A data layer object property.
pdgd.ObjectSnapshot

A representation of the current state of a data layer’s object.
pdgd.PropertyNames

Holds string values used as property names
pdgd.SubscriptionHandler

A SubscriptionHandler is responsible for a specific data layer object path.

managers ¶

pdgd.DataLayerInterfaceManager

The DataLayerInterfaceManager manages instances of data layer interfaces.
pdgd.DataLayerVisualizerManager

The DataLayerVisualizerManager manages instances of data layer visualizers.
pdgd.GlobalDataLayerInstance

Access to the default data layer interface.
pdgd.SubscriptionHandlerManager

The SubscriptionHandlerManager manages instances of subscription handlers.

Queries ¶

pdgd.DataBackendQueryResults

Object representing the results of a backend query operation
pdgd.QueryDefinition

Object representing a query

types ¶

pdgd.registeredType

The type of object when registering a custom class with PDGD