PIOT-CDA-02-003: Connect SystemPerformanceManager to ConstrainedDeviceApp

[labbenchstudios]

Description

• Create an instance of SystemPerformanceManager within ConstrainedDeviceApp and invoke the manager's start / stop methods within the app's start / stop methods.

Review the README

• Please see README.md for further information on, and use of, this content.
• License for embedded documentation and source codes: PIOT-DOC-LIC

Estimated effort may vary greatly

• The estimated level of effort for this exercise shown in the 'Estimate' section below is a very rough approximation. The actual level of effort may vary greatly depending on your development and test environment, experience with the requisite technologies, and many other factors.

Actions

NOTE: The implementation examples depicted here are only one way to implement the requirements listed. Your own implementation may vary of course.

NOTE 2: All of the following instructions relate to the ConstrainedDeviceApp.

• Within ConstrainedDeviceApp, import the SystemPerformancManager module and class:

  from programmingtheiot.cda.system.SystemPerformanceManager import SystemPerformanceManager

• Create a class-scoped instance of SystemPerformanceManager within the ConstrainedDeviceApp constructor called sysPerfManager as follows: self.sysPerfManager = SystemPerformanceManager()
• Edit the startApp() method to include a call to self.sysPerfManager.startManager().

• Edit the stopApp() method to include a call to self.sysPerfManager.stopManager().

  
  def __init__(self):
  logging.info("Initializing CDA...")
  
  self.sysPerfMgr = SystemPerformanceManager()

def startApp(self): logging.info("Starting CDA...")

self.sysPerfMgr.startManager()

logging.info("CDA started.")

def stopApp(self, code: int): logging.info("CDA stopping...")

self.sysPerfMgr.stopManager()

logging.info("CDA stopped with exit code %s.", str(code))   

**Estimate**

- Small

**Tests**

- Integration tests (in ./src/test/python/programmingtheiot/part01/integration)
  - Run ./app/ConstrainedDeviceAppTest. Integration test should pass and generate output similar to the following:

Finding files... done. Importing test modules ... done.

2020-07-20 10:23:00,146:INFO:Initializing CDA... 2020-07-20 10:23:00,147:INFO:Loading configuration... 2020-07-20 10:23:00,260:INFO:Starting CDA... 2020-07-20 10:23:00,260:INFO:Started SystemPerformanceManager. 2020-07-20 10:23:00,260:INFO:CDA started. 2020-07-20 10:23:00,260:INFO:CDA stopping... 2020-07-20 10:23:00,260:INFO:Stopped SystemPerformanceManager. 2020-07-20 10:23:00,260:INFO:CDA stopped with exit code 0.

Ran 1 test in 0.115s

OK

[dbeavers]

add from programmingtheiot.cda.system.SystemPerformanceManager import SystemPerformanceManager

[labbenchstudios]

Fixed - added requisite import statement.