Since we are ready with the foundation for building meaningful APIs on top of it, in this chapter, we will
Create data access APIs
Develop utility APIs
Data Access APIs
As a part of the wish list, we had requirements labeled D1 and D2, which were primarily for accessing data records from the time-series data storage. We covered this when creating core services in Chapter 7. We also covered the D4 requirement for message publishing APIs over HTTP.
The next API that we will create helps us get one or several data records based on a specified condition for topic or payload, or both. ...
