public Query(string searchedWord, string directory, int queueSize, IDispatcher dispatcher, IDispatcherTimer dispatcherTimer)
{
Dispatcher = dispatcher;
DispatcherTimer = dispatcherTimer;
DispatcherTimer.Interval = TimeSpan.FromMilliseconds(100);
FileProcessor = new FileProcessor(searchedWord, Dispatcher);
DispatcherTimer.Handler = (sender, args) => {
FileProcessor.Results.CurrentTime = DateTime.Now;
};
Files = new FileProvider(directory).GetEnumerator();
QueueSize = queueSize;
Queue = new Queue <FileInfo>();
}
public void Process(int searcherCount)
{
Dispatcher.InvokeAsync(() => {
FileProcessor.Results.SearchState = "searching";
FileProcessor.Results.StartTimer();
DispatcherTimer.Start();
});
var producerThread = new Thread(() => {
while (true)
{
var file = Files.MoveNext() ? Files.Current : null;
lock (Queue) {
while (Queue.Count > QueueSize)
{
Monitor.Wait(Queue);
}
Queue.Enqueue(file);
if (file == null)
{
Monitor.PulseAll(Queue);
break;
}
else
{
Monitor.Pulse(Queue);
}
}
}
});
ThreadStart searcher = () => {
while (true)
{
FileInfo item;
lock (Queue) {
while (Queue.Count == 0)
{
Monitor.Wait(Queue);
}
item = Queue.Peek();
if (item == null)
{
break;
}
Queue.Dequeue();
Monitor.Pulse(Queue);
}
// out of lock
FileProcessor.Process(item);
}
};
Thread[] threads = new Thread[searcherCount];
for (var i = 0; i < threads.Length; ++i)
{
threads[i] = new Thread(searcher);
threads[i].Start();
}
producerThread.Start();
producerThread.Join();
for (var i = 0; i < threads.Length; ++i)
{
threads[i].Join();
}
Dispatcher.InvokeAsync(() =>
{
FileProcessor.Results.SearchState = "finished";
DispatcherTimer.Stop();
});
}