public string Oldest()
{
lock (CacheLock)
{
Tuple<string, object, DateTime> oldest = Cache.Where(x => x.Item3 != null).OrderBy(x => x.Item3).First();
return oldest.Item1;
}
}
static void FIFOCacheTest()
{
try
{
bool runForever = true;
int capacity = 2048;
int evictCount = 512;
int loadCount = 256;
bool cacheDebug = true;
int dataLen = 4096;
byte[] data = InitByteArray(dataLen, 0x00);
FIFOCache cache = new FIFOCache(capacity, evictCount, cacheDebug);
Thread.Sleep(250);
while (runForever)
{
Console.WriteLine("-------------------------------------------------------------------------------");
Console.WriteLine("Available commands (FIFO Cache Test):");
Console.WriteLine(" get Get entry by key");
Console.WriteLine(" load Load " + loadCount + " new records");
Console.WriteLine(" oldest Get the oldest entry");
Console.WriteLine(" newest Get the newest entry");
Console.WriteLine(" count Get the count of cached entries");
Console.WriteLine(" clear Clear the cache");
Console.WriteLine(" quit Exit the application");
Console.WriteLine(" debug Flip the cache debug flag (currently " + cache.Debug + ")");
Console.WriteLine("");
Console.Write("Command > ");
string userInput = Console.ReadLine();
if (String.IsNullOrEmpty(userInput)) continue;
switch (userInput.ToLower())
{
case "get":
Console.Write("Key > ");
string getKey = Console.ReadLine();
if (String.IsNullOrEmpty(getKey)) break;
byte[] keyData = (byte[])cache.Get(getKey);
if (keyData == null) Console.WriteLine("Cache miss");
else Console.WriteLine("Cache hit");
break;
case "load":
DateTime startTime = DateTime.Now;
for (int i = 0; i < loadCount; i++)
{
string loadKey = Guid.NewGuid().ToString();
Console.Write("Adding entry " + i + " of " + loadCount + " \r");
cache.AddReplace(loadKey, data);
}
Console.WriteLine(
"Loaded " + loadCount +
" records in " + TotalTimeFrom(startTime) + ": " +
DecimalToString(TotalMsFrom(startTime) / loadCount) + "ms per entry");
break;
case "oldest":
Console.WriteLine("Oldest key: " + cache.Oldest());
break;
case "newest":
Console.WriteLine("Newest key: " + cache.Newest());
break;
case "count":
Console.WriteLine("Cache count: " + cache.Count());
break;
case "clear":
cache.Clear();
Console.WriteLine("Cache cleared");
break;
case "q":
case "quit":
runForever = false;
break;
case "debug":
cache.Debug = !cache.Debug;
break;
default:
continue;
}
}
Console.WriteLine("Goodbye!");
return;
}
catch (Exception e)
{
PrintException(e);
}
finally
{
Console.WriteLine("");
Console.Write("Press ENTER to exit.");
Console.ReadLine();
}
}
