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); }