Mastering Internet of Things

Defining the data source

Defining the metering topology data source is a straightforward process. We begin by stating that it implements the IDataSource interface:

public class MeteringTopology : IDataSource 
{ 
   public MeteringTopology() 
   { 
   } 

We define some basic properties of the source, such as its identity, that it does not have any child sources, and that it does not change over time:

public const string ID = "MeteringTopology"; 
public string SourceID => ID; 
public bool HasChildren => false; 
public DateTime LastChanged => DateTime.MinValue; 
public IEnumerable<IDataSource> ChildSources => null; 

We also need to make sure to give the data source a localizable human-readable name. Localizable strings are divided into namespaces. These namespaces ...