public static void TasksInitialize(int tasksCount)
{
tasks = new Task[tasksCount];
for (int i = 0; i < tasks.Length; i++)
{
var choice = random.Next(100);
/* 1% is remove */
if (choice == 0)
{
tasks[i] = new Task(() => examSystem.Remove(random.Next(), random.Next()));
}
/* 90% is contains */
else if (choice > 10)
{
tasks[i] = new Task(() => examSystem.Contains(random.Next(), random.Next()));
}
/* 9% is add */
else
{
tasks[i] = new Task(() => examSystem.Add(random.Next(), random.Next()));
}
}
}
static async Task QueryStudents([NotNull] IExamSystem system, StudentDataRange range) => await Task.Run(() =>
{
for (long studentId = range.FromStudentId; studentId < range.ToStudentId; studentId += 1)
{
for (long courseId = range.FromCourseId; courseId < range.ToCourseId; courseId += 1)
{
system.Contains(studentId, courseId);
}
}
});
private void MakeRequests(object parameter)
{
if (parameter as IExamSystem == null)
{
throw new ArgumentException("Invalid argument\n");
}
IExamSystem examSystem = (IExamSystem)parameter;
for (int i = 0; i < 1024; i++)
{
int studentID = Math.Abs(Guid.NewGuid().GetHashCode());
int courseID = Math.Abs(Guid.NewGuid().GetHashCode());
examSystem.Add(studentID, courseID);
Assert.IsTrue(examSystem.Contains(studentID, courseID));
examSystem.Remove(studentID, courseID);
Assert.IsFalse(examSystem.Contains(studentID, courseID));
}
}
static async Task <ProfileResult> EmulateWork([NotNull] IExamSystem system, int scale)
{
int readActionsNumber = 90 * scale;
int addActionsNumber = 9 * scale;
int removeActionsNumber = 1 * scale;
var readActions = RepeatOperation(
(studentId, courseId) => system.Contains(studentId, courseId),
readActionsNumber
);
var addActions = RepeatOperation(system.Add, addActionsNumber);
var removeActions = RepeatOperation(system.Remove, removeActionsNumber);
return(new ProfileResult(
addRequests: await addActions,
removeRequests: await removeActions,
containsRequests: await readActions
));
}
static void WorkIteration(IExamSystem system, int numberOfMoves, int numberOfStudents, int numberOfCourses)
{
int numberOfCotainsMoves = Convert.ToInt32(0.9 * numberOfMoves);
int numberOfAdditions = Convert.ToInt32(0.09 * numberOfMoves);
int numberOfDeletions = Convert.ToInt32(0.01 * numberOfMoves);
Random random = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < numberOfAdditions; i++)
{
system.Add(random.Next(numberOfMoves), random.Next(numberOfCourses));
}
for (int i = 0; i < numberOfCotainsMoves; i++)
{
system.Contains(random.Next(numberOfMoves), random.Next(numberOfCourses));
}
for (int i = 0; i < numberOfDeletions; i++)
{
system.Remove(random.Next(numberOfMoves), random.Next(numberOfCourses));
}
}