public bool TryGetValue(TKey key, out TValue value)
{
TimestampedValue result;
value = default(TValue);
if (cache.TryGetValue(key, out result))
{
result.Generation = Interlocked.Increment(ref nextGeneration);
var age = DateTime.UtcNow.Subtract(result.WhenLoaded);
if (age > requiredFreshness)
{
if (!cache.TryRemove(key, out result))
{
return(false);
}
if (RaiseFlushEvent == null)
{
return(false);
}
var args = new FlushEventArgs(key, result.Value);
RaiseFlushEvent(this, args);
return(false);
}
value = result.Value;
}
else
{
return(false);
}
return(true);
}
private static void OnFlushEvent(FlushEventArgs args)
{
using (GlobalInitializerFacade.CoreLockScope)
{
_coreInitialized = false;
}
}
private void AdjustSize()
{
while (cache.Count >= MaximumSize)
{
long generationToDelete = Interlocked.Increment(ref generationToFree);
KeyValuePair <TKey, TimestampedValue> entryToFree =
cache.FirstOrDefault(kvp => kvp.Value.Generation == generationToDelete);
if (entryToFree.Key == null)
{
continue;
}
TKey keyToFree = entryToFree.Key;
TimestampedValue old;
if (!cache.TryRemove(keyToFree, out old))
{
continue;
}
if (RaiseFlushEvent == null)
{
continue;
}
var args = new FlushEventArgs(keyToFree, old.Value);
RaiseFlushEvent(this, args);
}
}
private void AdjustSize()
{
while (_cache.Count >= MaximumSize)
{
var generationToDelete = Interlocked.Increment(ref _generationToFree);
var entryToFree = _cache.FirstOrDefault(kvp => kvp.Value.Generation == generationToDelete);
if (entryToFree.Key == null)
{
continue;
}
var keyToFree = entryToFree.Key;
if (!_cache.TryRemove(keyToFree, out var old))
{
continue;
}
if (RaiseFlushEvent == null)
{
continue;
}
var args = new FlushEventArgs(keyToFree, old.Value);
RaiseFlushEvent(this, args);
}
}
/// <summary>
/// 尝试获取缓存值，如果超过 MaxAge，该条目将被惰性清理掉。
/// </summary>
/// <param name="key">键</param>
/// <param name="value">键</param>
/// <returns>是否成功</returns>
public bool TryGetValue(TKey key, out TValue value)
{
value = default;
if (_cache.TryGetValue(key, out var result))
{
result.Generation = Interlocked.Increment(ref _nextGeneration);
var age = DateTime.UtcNow.Subtract(result.WhenLoaded);
if (age > _maxAge)
{
if (!_cache.TryRemove(key, out result))
{
return(false);
}
if (RaiseFlushEvent == null)
{
return(false);
}
var args = new FlushEventArgs(key, result.Value);
RaiseFlushEvent(this, args);
return(false);
}
value = result.Value;
}
else
{
return(false);
}
return(true);
}
private static void OnFlushEvent(FlushEventArgs args)
{
// Removing all non flush-persistent subscriptions
var dictionaries = new[]
{
_dataBeforeAddEventDictionary,
_dataAfterAddEventDictionary,
_dataBeforeUpdateEventDictionary,
_dataAfterUpdateEventDictionary,
_dataDeletedEventDictionary,
_dataAfterBuildNewEventDictionary,
_storeChangedEventDictionary
};
foreach (var dictionary in dictionaries)
{
foreach (var subscrList in dictionary.GetValues())
{
for (int i = subscrList.Count - 1; i >= 0; i--)
{
if (!subscrList[i].Second)
{
subscrList.RemoveAt(i);
}
}
}
}
}
protected override void OnOutputStreamFlushing(FlushEventArgs args)
{
if (!this.HeaderSent)
{
args = new FlushEventArgs(this.SerializeHeaders() + args.Data);
this.HeaderSent = true;
}
base.OnOutputStreamFlushing(args);
}
public void Clear()
{
foreach (var pair in _cache)
{
var args = new FlushEventArgs(pair.Key, pair.Value.Value);
RaiseFlushEvent?.Invoke(this, args);
}
_cache.Clear();
}
public void Clear()
{
foreach (var pair in cache)
{
var args = new FlushEventArgs(pair.Key, pair.Value.Value);
EventHandler <FlushEventArgs> handler = RaiseFlushEvent;
if (handler == null)
{
continue;
}
handler(this, args);
}
cache.Clear();
}
/// <summary>
/// Remove all expired value from the LRU instance.
/// </summary>
public void RemoveExpired()
{
var now = DateTime.UtcNow;
var toRemove = new List <TKey>();
foreach (var entry in this.cache)
{
var age = DateTime.UtcNow.Subtract(entry.Value.WhenLoaded);
if (age > requiredFreshness)
{
toRemove.Add(entry.Key);
}
}
foreach (var key in toRemove)
{
if (cache.TryRemove(key, out var result) && RaiseFlushEvent != null)
{
var args = new FlushEventArgs(key, result.Value);
RaiseFlushEvent(this, args);
}
}
}
private static void OnFlushEvent(FlushEventArgs args)
{
_workflowFacade.Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_implementation.OnFlush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
using (GlobalInitializerFacade.CoreLockScope)
{
_coreInitialized = false;
}
}
private static void OnFlushEvent(FlushEventArgs args)
{
Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_metaFunctionProviderRegistry.Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
Flush();
ReadSettings();
}
private void OnFlush(FlushEventArgs args)
{
_packageDescriptions = null;
}
private static void OnFlushEvent(FlushEventArgs args)
{
_metaFunctionProviderRegistry.Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_hookingFacade.Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
Interlocked.Increment(ref _flushCounter);
_subscribedTo = new Hashset <Type>();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_externalFileChangeActions.Clear();
}
private void OnFlush(FlushEventArgs args)
{
_packageDescriptions = null;
}
private static void OnFlushEvent(FlushEventArgs args)
{
Interlocked.Increment(ref _flushCounter);
_subscribedTo = new Hashset<Type>();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_hookingFacade.Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
Flush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_externalFileChangeActions.Clear();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_implementation.OnFlush();
}
private static void OnFlushEvent(FlushEventArgs args)
{
_workflowFacade.Flush();
}