Module page.codeberg.friedolyn.Friedolyn

Package page.codeberg.friedolyn

Class Friedolyn.FetchGradesTask

java.lang.Object

java.util.TimerTask

page.codeberg.friedolyn.Friedolyn.FetchGradesTask

All Implemented Interfaces:

Runnable

Enclosing class:

Friedolyn

public class Friedolyn.FetchGradesTask
extends TimerTask

Fetches the student's grades from the University of Jena's Friedolin system by calling the Friedolyn.fetchGrades().

See Also:

• run()

Constructor Summary

Constructors

Constructor	Description
FetchGradesTask()

Method Summary

Modifier and Type	Method	Description
private boolean	attemptFetchingGrades()	Attempts to fetch the student's grades from the University of Jena's Friedolin system two times with a delay of 5 seconds between each attempt, by calling the Friedolyn.fetchGrades().
void	run()	Fetches the student's grades from the University of Jena's Friedolin system by calling the Friedolyn.fetchGrades().

Methods inherited from class java.util.TimerTask

cancel, scheduledExecutionTime

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FetchGradesTask

public FetchGradesTask()

Method Details

run

public void run()

Fetches the student's grades from the University of Jena's Friedolin system by calling the Friedolyn.fetchGrades(). Resets the countdown.

Will make n waves of attempts to fetch the grades with a delay of x seconds between two waves.
Each wave consists of two distinct attempts with a delay of 5 seconds between each attempt. Will return early if possible.

Specified by:

run in interface Runnable

Specified by:

run in class TimerTask

Implementation Note:

When restarting the Friedolyn.countdown, we use scheduleAtFixedRate instead of schedule, because the Friedolyn.countdown acts as a clock that should not be influenced by the time it takes to execute the run() method. In other words, no countdown decrement should delay the next countdown decrement.

attemptFetchingGrades

private boolean attemptFetchingGrades()

Attempts to fetch the student's grades from the University of Jena's Friedolin system two times with a delay of 5 seconds between each attempt, by calling the Friedolyn.fetchGrades(). Will return early if possible.

Returns:

true if the grades were fetched successfully, false otherwise.

Implementation Note:

We use a for-loop instead of simply calling Friedolyn.fetchGrades() twice, in order to make the amount of attempts easier to re-configure in the future.