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System Registry

The system registry is one of the main components of OSH middleware, whose purpose is to manage all systems (i.e. sensors, actuators, processes...) connected to the hub via device or system drivers or other OSH modules.

Previously you learned about modules and the module registry, which is responsible for managing various types of modules that can be loaded into OSH. However, the module registry does not provide the structure necessary to represent the complex interactions between modules.

The system registry is necessary to register systems created by sensor/system drivers and processing modules. Once they are registered, drivers and processing modules can begin publishing observations through datastreams and receive commands on their control/command channels.

System registration will attach the system to its associated database, and register it with the event bus. These are two crucial steps as they allow data/events produced by a system driver to be accessible via the federated database and event bus subscriptions.

ISystemDriverRegistry​

The ISystemDriverRegistry interface provides methods for interfacing with a system registry.

This includes the following:

  • Registering/unregistering a system driver module (with or without feature of interest)
  • Directly registering a system, datastream, control stream
  • Registering/unregistering a system's associated database

See ISystemDriverRegistry API Reference