Mastering Internet of Things

Publishing our nodes

Our data source will only contain two static embedded root nodes. We add these in code:

public static ActuatorNode ActuatorNode = new ActuatorNode(); 
public static SensorNode SensorNode = new SensorNode(); 
 
public IEnumerable<INode> RootNodes => 
   new INode[] { ActuatorNode, SensorNode }; 

Access to all nodes in the source is provided through the GetNodeAsync method. Since our implementation only contains two static nodes, we do a simple if-then-else sequence to check for the identities. In a more dynamic setting, some form of look-up procedure would be used:

public Task<INode> GetNodeAsync(IThingReference NodeRef) { if (SensorNode.SameThing(NodeRef)) return Task.FromResult<INode>(SensorNode); else if (ActuatorNode.SameThing(NodeRef)) ...