public static long AsyncCalcOccurences(string word, string langCode)
{
if (queriesQueue == null)
{
// Create the queries queue and start the working threads
queriesQueue = new Queue <WordAndLang>();
workingThreads = new Thread[MAX_THREADS_COUNT];
for (int i = 0; i < MAX_THREADS_COUNT; i++)
{
workingThreads[i] = new Thread(new ThreadStart(ProcessQueriesQueue));
workingThreads[i].Name = "Google.Query.Thread#" + i;
workingThreads[i].Start();
}
}
if (word.Contains(" "))
{
word = "\"" + word + "\"";
}
// Check the cache first
string query = word + " lang:" + langCode;
if (GoogleOccurencesCache.IsInCache(query))
{
long occurences = GoogleOccurencesCache.GetFromCache(query);
return(occurences);
}
// Add the query to a queue for asynchronous processing
lock (queriesQueue)
{
WordAndLang wordAndLang = new WordAndLang(word, langCode);
queriesQueue.Enqueue(wordAndLang);
Monitor.Pulse(queriesQueue);
}
return(0);
}
private static void ProcessQueriesQueue()
{
while (true)
{
WordAndLang query = null;
lock (queriesQueue)
{
if (queriesQueue.Count > 0)
{
query = queriesQueue.Dequeue();
}
else
{
Monitor.Wait(queriesQueue);
}
}
if (query != null)
{
Console.WriteLine("Thread {0} - job {1} of {2}",
Thread.CurrentThread.Name, queriesQueue.Count, queriesQueue.Count);
GetOccurences(query.Word, query.Lang);
}
}
}
