public Response GetNameFromIp(string ip)
{
var stopwatch = new Stopwatch();
var cacheHit = false;
var obtained = false;
long waitingTime = 0;
if (!_cacheIpToNameToRead.TryGetValue(ip, out var result))
{
obtained = true;
result = _nsLookup.GetNameFromIpSimple(ip);
stopwatch.Start();
lock (_cacheIpToNameToWrite)
{
stopwatch.Stop();
waitingTime = stopwatch.ElapsedMilliseconds;
_cacheIpToNameToWrite[ip] = result;
var copy = _cacheIpToNameToWrite.ToImmutableDictionary();
_cacheIpToNameToRead = copy;
}
}
else
{
cacheHit = true;
}
return(new Response(result, cacheHit, obtained, waitingTime));
}
public Response GetNameFromIp(string ip)
{
if (!_cacheIpToNameToRead.TryGetValue(ip, out var result))
{
object lockObject = null;
lock (_beingDownloaded)
{
if (!_beingDownloaded.TryGetValue(ip, out lockObject))
{
_beingDownloaded[ip] = lockObject = new object();
}
}
lock (lockObject)
{
if (!_cacheIpToNameToRead.TryGetValue(ip, out result))
{
result = _nsLookup.GetNameFromIpSimple(ip);
lock (_cacheIpToNameToWrite)
{
_cacheIpToNameToWrite[ip] = result;
_cacheIpToNameToRead = _cacheIpToNameToWrite.ToImmutableDictionary();
}
}
}
}
return(new Response(result));
}
public Response GetNameFromIp(string ip)
{
var stopwatch = new Stopwatch();
var cacheHit = false;
var obtained = false;
long waitingTime = 0;
if (!_cacheIpToName.TryGetValue(ip, out var result))
{
stopwatch.Start();
lock (_cacheIpToName)
{
stopwatch.Stop();
waitingTime = stopwatch.ElapsedMilliseconds;
if (!_cacheIpToName.TryGetValue(ip, out result))
{
obtained = true;
_cacheIpToName[ip] = result = _nsLookup.GetNameFromIpSimple(ip);
}
else
{
cacheHit = true;
}
}
}
else
{
cacheHit = true;
}
return(new Response(result, cacheHit, obtained, waitingTime));
}
public Response GetNameFromIp(string ip)
{
var stopwatch = new Stopwatch();
var cacheHit = false;
var obtained = false;
long waitingTimeCheck = 0;
long waitingTimeSet = 0;
stopwatch.Start();
if (!_memoryCache.TryGetValue <string>(ip, out var result))
{
stopwatch.Stop();
waitingTimeCheck = stopwatch.ElapsedMilliseconds;
result = _nsLookup.GetNameFromIpSimple(ip);
obtained = true;
stopwatch.Start();
_memoryCache.Set(ip, result);
stopwatch.Stop();
waitingTimeSet = stopwatch.ElapsedMilliseconds;
}
else
{
cacheHit = true;
}
return(new Response(result, cacheHit, obtained, waitingTimeSet + waitingTimeCheck));
}
public Response GetNameFromIp(string ip)
{
if (!_cacheIpToName.TryGetValue(ip, out var result))
{
_cacheIpToName[ip] = result = _nsLookup.GetNameFromIpSimple(ip);
}
return(new Response(result));
}
public Response GetNameFromIp(string ip)
{
if (!_memoryCache.TryGetValue <string>(ip, out var result))
{
result = _nsLookup.GetNameFromIpSimple(ip);
_memoryCache.Set(ip, result);
}
return(new Response(result));
}
public Response GetNameFromIp(string ip)
{
var stopwatch = new Stopwatch();
var cacheHit = false;
var obtained = false;
long initialWaitingTime = 0;
long sameKeyWaitingTime = 0;
long writeToCacheWaitingTime = 0;
if (!_cacheIpToNameToRead.TryGetValue(ip, out var result))
{
object lockObject = null;
stopwatch.Start();
lock (_beingDownloaded)
{
stopwatch.Stop();
initialWaitingTime = stopwatch.ElapsedMilliseconds;
if (!_beingDownloaded.TryGetValue(ip, out lockObject))
{
_beingDownloaded[ip] = lockObject = new object();
}
}
stopwatch.Start();
lock (lockObject)
{
stopwatch.Stop();
sameKeyWaitingTime = stopwatch.ElapsedMilliseconds;
if (!_cacheIpToNameToRead.TryGetValue(ip, out result))
{
obtained = true;
result = _nsLookup.GetNameFromIpSimple(ip);
stopwatch.Start();
lock (_cacheIpToNameToWrite)
{
stopwatch.Stop();
writeToCacheWaitingTime = stopwatch.ElapsedMilliseconds;
_cacheIpToNameToWrite[ip] = result;
_cacheIpToNameToRead = _cacheIpToNameToWrite.ToImmutableDictionary();
}
}
else
{
cacheHit = true;
}
}
}
else
{
cacheHit = true;
}
return(new Response(result, cacheHit, obtained, initialWaitingTime + sameKeyWaitingTime + writeToCacheWaitingTime));
}
public Response GetNameFromIp(string ip)
{
bool cacheHit = true;
var result = _cacheIpToName.GetOrAdd(
ip,
new Lazy <string>(() =>
{
cacheHit = false; return(_nsLookup.GetNameFromIpSimple(ip));
}));
return(new Response(result.Value, cacheHit, !cacheHit, 0));
}
public Response GetNameFromIp(string ip)
{
if (!_cacheIpToNameToRead.TryGetValue(ip, out var result))
{
result = _nsLookup.GetNameFromIpSimple(ip);
lock (_cacheIpToNameToWrite)
{
_cacheIpToNameToWrite[ip] = result;
var copy = _cacheIpToNameToWrite.ToImmutableDictionary();
_cacheIpToNameToRead = copy;
}
}
return(new Response(result));
}
public Response GetNameFromIp(string ip)
{
if (!_cacheIpToName.TryGetValue(ip, out var result))
{
lock (_cacheIpToName) // Add a Lazy instance to the dictionary only one at the time
{
if (!_cacheIpToName.TryGetValue(ip, out result))
{
_cacheIpToName[ip] = result = new Lazy <string>(() => _nsLookup.GetNameFromIpSimple(ip));
}
}
}
return(new Response(result.Value));
}
public Response GetNameFromIp(string ip)
{
bool cacheHit = true;
if (!_cacheIpToName.TryGetValue(ip, out var result))
{
lock (_cacheIpToName)
{
if (!_cacheIpToName.TryGetValue(ip, out result))
{
_cacheIpToName[ip] = result = new Lazy <string>(() =>
{
cacheHit = false;
return(_nsLookup.GetNameFromIpSimple(ip));
});
}
}
}
return(new Response(result.Value, cacheHit, !cacheHit, 0));
}
private string ObtainUncachedValue(string ip)
{
return(_nsLookup.GetNameFromIpSimple(ip));
}
public Response GetNameFromIp(string ip)
{
return(new Response(_nsLookup.GetNameFromIpSimple(ip)));
}
public Response GetNameFromIp(string ip)
{
var result = _cacheIpToName.GetOrAdd(ip, new Lazy <string>(() => _nsLookup.GetNameFromIpSimple(ip)));
return(new Response(result.Value));
}