public CacheEntry(CacheEntryIdentifier identifier, object value, TimeSpan expirationPeriod)
{
Identifier = identifier;
Value = value;
this.ExpirationPeriod = expirationPeriod;
ValidUntil = DateTime.Now.Add(expirationPeriod);
}
public void Remove(CacheEntryIdentifier key)
{
if (cacheEntriesMap.TryGetValue(key, out var value))
{
cacheEntriesList.Remove(value);
cacheEntriesMap.Remove(key);
}
}
public void Add(string key, object value, TimeSpan?validUntil = null)
{
var expiration = validUntil ?? TimeSpan.FromDays(1000);
var indentifier = new CacheEntryIdentifier(key, options);
var cacheEntry = new CacheEntry(indentifier, value, expiration);
cacheStore.AddEntry(cacheEntry);
}
public T Get(CacheEntryIdentifier key)
{
// if key exists, just move it to the start the line
if (cacheEntriesMap.TryGetValue(key, out var value))
{
MoveNodeToFront(value);
return(value.Value);
}
return(default(T));
}
public void RemoveEntry(string key)
{
wrLock.EnterWriteLock();
try
{
var identifier = new CacheEntryIdentifier(key, options);
cacheEntries.Remove(identifier);
}
finally
{
wrLock.ExitWriteLock();
}
}
public CacheEntry GetEntry(string key)
{
wrLock.EnterUpgradeableReadLock();
try
{
var identifier = new CacheEntryIdentifier(key, options);
var cacheEntry = cacheEntries.Get(identifier);
// check if null
if (cacheEntry == null)
{
return(null);
}
// check if entry has expired
if (cacheEntry.HasExpired())
{
wrLock.EnterWriteLock();
try
{
cacheEntries.Remove(identifier);
return(null);
}
finally
{
wrLock.ExitWriteLock();
}
}
else
{
// update the valid time
cacheEntry.UpdateValidUntil();
return(cacheEntry);
}
}
finally
{
wrLock.ExitUpgradeableReadLock();
}
}
public static CacheEntry New(string key, object value, TimeSpan timeSpan, LRUCacheOptions options = null)
{
var indentifier = new CacheEntryIdentifier(key, options ?? new LRUCacheOptions());
return(new CacheEntry(indentifier, value, timeSpan));
}
