public TValue GetValueOrSetAsync(TKey key, Func <TValue> func, Action <Task> continueWith, TValue defaultValue, object lockToken, TimeSpan?funcTimespanLimit = null)
{
TimeLimitedCacheValue timeLimitedValue;
if (this._cache.TryGetValue(key, out timeLimitedValue))
{
timeLimitedValue.LastAccess = DateTime.Now;
return(timeLimitedValue.Value);
}
lock (lockToken)
{
if (this._cache.TryGetValue(key, out timeLimitedValue))
{
timeLimitedValue.LastAccess = DateTime.Now;
return(timeLimitedValue.Value);
}
try
{
this._cache.AddOrUpdate(key, k => timeLimitedValue = new TimeLimitedCacheValue(defaultValue), (k, v) => timeLimitedValue = v);
if (funcTimespanLimit == null)
{
var waitedTask = Task.Factory.StartNew(() =>
{
timeLimitedValue.Value = func();
timeLimitedValue.LastAccess = DateTime.Now;
this.CreateTimer();
}).ContinueWith(continueWith);
}
else
{
var waitedTask = Task.Factory.StartNew(() =>
{
timeLimitedValue.Value = func();
timeLimitedValue.LastAccess = DateTime.Now;
this.CreateTimer();
});
var waitingTask = Task.Factory.StartNew(() => { waitedTask.Wait((TimeSpan)funcTimespanLimit); }).ContinueWith(continueWith);
}
return(defaultValue);
}
catch (Exception) {
throw;
}
}
}
public TValue GetValueOrSet(TKey key, Func <TValue> func, object lockToken)
{
TimeLimitedCacheValue timeLimitedValue;
if (this._cache.TryGetValue(key, out timeLimitedValue))
{
timeLimitedValue.LastAccess = DateTime.Now;
return(timeLimitedValue.Value);
}
lock (lockToken)
{
if (this._cache.TryGetValue(key, out timeLimitedValue))
{
timeLimitedValue.LastAccess = DateTime.Now;
return(timeLimitedValue.Value);
}
var value = func();
var chacheValue = new TimeLimitedCacheValue(value);
this._cache.TryAdd(key, chacheValue);
return(value);
}
}
