private async Task <bool> ProcessSignupAsync(Models.CourseStudent courseStudent)
{
try
{
if (courseStudent == null || courseStudent.CourseId == 0 || courseStudent.StudentId == 0)
{
_logger.LogInformation(INVALID_INPUTS);
return(false);
}
var course = await _courseDbContext.FindAsync(courseStudent.CourseId);
if (course == null)
{
throw new KeyNotFoundException();
}
if (course.CourseStudents.Count() >= course.Capacity)
{
throw new CourseCapacityFullException();
}
courseStudent.JoinDate = DateTime.UtcNow;
_courseStudentDbContext.Add(courseStudent);
var records = await _courseStudentDbContext.SaveChangesAsync();
return(records > 0);
}
catch (Exception exp)
{
_logger.Log(LogLevel.Error, exp.Message, exp.Source);
throw;
}
}
public Task SignupPublishAsync(int courseId, int studentId, CancellationToken cancellationToken)
{
// Publish creation of course student to messaging service bus queue.
var courseStudent = new Models.CourseStudent()
{
CourseId = courseId,
StudentId = studentId,
};
var publishTask = Task.Factory.StartNew(
action: () => _messagingServiceBus.Publish("Course_Student_Create", courseStudent),
cancellationToken: cancellationToken,
creationOptions: TaskCreationOptions.PreferFairness,
scheduler: null
);
return(publishTask);
}