The SDK provides various options for subscribing to a project.
The steps involved in subscribing to data using the SDK are:
- Create a NetEspSubscriber from a previously connected NetEspProject instance.
- Subscribe to one or more streams. Call int32_t
NetEspSubscriber::subscribe_stream (NetEspStream^ stream, NetEspError^ error
) for each stream you are connecting to.
- In direct access mode, retrieve events using NetEspSubscriber.get_next_event(). In callback and select access modes, the event is generated by the SDK and passed back to user code.
- For data events, retrieve NetEspMessageReader. This encapsulates a single message
from the ESP project. It may consist of a single
data row or a transaction or envelope block with multiple data rows.
- Retrieve one or more NetEspRowReader. Use the methods in NetEspRowReader to read in individual fields.