/// <summary>
/// To get next process process that shoulb be processed
/// based on length of execution, shortest first
/// </summary>
/// <param name="jobQueue">job queue (jobs that need to be processed)</param>
/// <param name="time">time used by dispatcher</param>
/// <returns>return shortest process</returns>
private Job NextShortestProcess(Queue<Job> jobQueue, int time)
{
Job job = new Job();
int shortest = int.MaxValue;
foreach (Job jobElt in jobQueue)
{
if (jobElt.arrivalTime <= time)
{
if (jobElt.executionTime < shortest && jobElt.executionTime != 0)
{
job = jobElt;
shortest = jobElt.executionTime;
}
}
}
return job;
}
/// <summary>
/// To get data from text file and populate job queue with those data
/// </summary>
/// <param name="filename">file name of text file</param>
/// <returns>job queue populated by jobs from text file</returns>
private Queue<Job> GetData(string filename)
{
Queue<Job> jobQueue = new Queue<Job>();
if (File.Exists(filename))
{
FileStream inFile = new FileStream(filename, FileMode.Open, FileAccess.Read);
StreamReader reader = new StreamReader(inFile);
string line = reader.ReadLine();
string[] tag = null;
int counter = 1;
char[] delim = { '!', '\t', '@', ' '};
while (line != null)
{
if (line == "")
{
line = reader.ReadLine();
continue;
}
tag = line.Split(delim, StringSplitOptions.RemoveEmptyEntries);
if (tag[0].StartsWith("#") || tag.Count() == 0)
{
line = reader.ReadLine();
continue;
}
Job job = new Job("Job " + counter, int.Parse(tag[0]), int.Parse(tag[1]));
jobQueue.Enqueue(job);
line = reader.ReadLine();
counter++;
}
reader.Close();
inFile.Close();
}
else
Console.WriteLine("File is not found...");
return jobQueue;
}
