Module design_pattern_examples_rust::facade

The Facade design pattern example module

The Facade pattern is used when a simplified version of an interface on a complicated sub-system is needed in situations where the whole complicated sub-system does not need to be exposed.

In this example, the complicated subsystem is a representation of a device network complete with scan chains, device idcodes, and device devices that can be selected and deselected. The Facade exposed by this complex network exposes only the scan chain, getting device idcodes based on an index into those scan chains, resetting the scan chains and selecting a device to appear in the scan chain.

Accessed through the facade_exercise() function.

Modules

• facade_complicatedsubsystem
  Contains the implementation of the complicated facade sub-system.
• facade_devicenetworkhighlevel
  Contains the DeviceNetworkHighLevel struct that wraps the low-level complicated facade sub-system and which is exposed by the IDeviceNetworkHighLevel trait.
• facade_idevicenetworkhighlevel_trait
  Contains the IDeviceNetworkHighLevel trait that represents a simplified view of a complicated facade sub-system.
• facade_idevicenetworklowlevel_trait
  Contains the IDeviceNetworkLowLevel trait that represents the complicated facade sub-system.

Functions

• _facade_show_id_codes 🔒
  Helper function to present a formatted list of idcodes for a particular device chain. The output is on a single line.
• facade_exercise
  Example of using the “Facade” pattern.