private void RemoveEntry(CacheEntry entry)
{
_entryLock.EnterWriteLock();
try
{
// Only remove it if someone hasn't modified it since our lookup
CacheEntry currentEntry;
if (_entries.TryGetValue(entry.Key, out currentEntry) &&
object.ReferenceEquals(currentEntry, entry))
{
_entries.Remove(entry.Key);
}
}
finally
{
_entryLock.ExitWriteLock();
}
entry.InvokeEvictionCallbacks();
}
public object Set(object key, object value, MemoryCacheEntryOptions cacheEntryOptions)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
CheckDisposed();
CacheEntry priorEntry = null;
var utcNow = _clock.UtcNow;
DateTimeOffset?absoluteExpiration = null;
if (cacheEntryOptions.AbsoluteExpirationRelativeToNow.HasValue)
{
absoluteExpiration = utcNow + cacheEntryOptions.AbsoluteExpirationRelativeToNow;
}
else if (cacheEntryOptions.AbsoluteExpiration.HasValue)
{
if (cacheEntryOptions.AbsoluteExpiration <= utcNow)
{
throw new ArgumentOutOfRangeException(
nameof(MemoryCacheEntryOptions.AbsoluteExpiration),
cacheEntryOptions.AbsoluteExpiration.Value,
"The absolute expiration value must be in the future.");
}
absoluteExpiration = cacheEntryOptions.AbsoluteExpiration;
}
var entry = new CacheEntry(
key,
value,
utcNow,
absoluteExpiration,
cacheEntryOptions,
_entryExpirationNotification);
var link = EntryLinkHelpers.ContextLink;
if (link != null)
{
// Copy expiration tokens and AbsoluteExpiration to the link.
// We do this regardless of it gets cached because the tokens are associated with the value we'll return.
if (entry.Options.ExpirationTokens != null)
{
link.AddExpirationTokens(entry.Options.ExpirationTokens);
}
if (absoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(absoluteExpiration.Value);
}
}
bool added = false;
_entryLock.EnterWriteLock();
try
{
if (_entries.TryGetValue(key, out priorEntry))
{
_entries.Remove(key);
priorEntry.SetExpired(EvictionReason.Replaced);
}
if (!entry.CheckExpired(utcNow))
{
_entries[key] = entry;
entry.AttachTokens();
added = true;
}
}
finally
{
_entryLock.ExitWriteLock();
}
if (priorEntry != null)
{
priorEntry.InvokeEvictionCallbacks();
}
if (!added)
{
entry.InvokeEvictionCallbacks();
}
StartScanForExpiredItems();
return(value);
}
