com.facebook.litho.dataflow

Class DataFlowGraph

java.lang.Object

com.facebook.litho.dataflow.DataFlowGraph

public class DataFlowGraph
extends java.lang.Object

A directed acyclic graph (DAG) created from one or more GraphBindings. These component GraphBindings define how nodes in this graph are connected to each other: GraphBindings can add nodes and connections when they are 'activated' and can remove nodes and connections when they're deactivated.

Data flows through the graph on each frame, from input nodes to output nodes.

Method Summary

Modifier and Type	Method and Description
static DataFlowGraph	create(TimingSource timingSource)
static DataFlowGraph	getInstance()
void	register(GraphBinding binding) Adds an activated GraphBinding.
static void	setInstance(DataFlowGraph dataFlowGraph) For tests, let's the testing environment explicitly provide a specific DataFlowGraph instance that can, for example, have a mocked TimingSource.
void	unregister(GraphBinding binding) Removes a GraphBinding.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static DataFlowGraph getInstance()

setInstance

public static void setInstance(DataFlowGraph dataFlowGraph)

For tests, let's the testing environment explicitly provide a specific DataFlowGraph instance that can, for example, have a mocked TimingSource.

create

public static DataFlowGraph create(TimingSource timingSource)

register

public void register(GraphBinding binding)

Adds an activated GraphBinding. This means that binding's nodes are added to the existing graph and data will flow through them on the next frame.

unregister

public void unregister(GraphBinding binding)

Removes a GraphBinding. This means any nodes that only belonged to that binding will be removed from the graph.