public object Set([NotNull] string key, IEntryLink link, object state, [NotNull] Func <ICacheSetContext, object> create)
{
CheckDisposed();
CacheEntry priorEntry = null;
var now = _clock.UtcNow;
var context = new CacheSetContext(key)
{
State = state, CreationTime = now
};
object value = create(context);
var entry = new CacheEntry(context, value, _entryExpirationNotification);
bool added = false;
if (link != null)
{
// Copy triggers and AbsoluteExpiration to the link.
// We do this regardless of it gets cached because the triggers are associated with the value we'll return.
if (entry.Context.Triggers != null)
{
link.AddExpirationTriggers(entry.Context.Triggers);
}
if (entry.Context.AbsoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(entry.Context.AbsoluteExpiration.Value);
}
}
_entryLock.EnterWriteLock();
try
{
if (_entries.TryGetValue(key, out priorEntry))
{
_entries.Remove(key);
priorEntry.SetExpired(EvictionReason.Replaced);
}
if (!entry.CheckExpired(now))
{
_entries[key] = entry;
entry.AttachTriggers();
added = true;
}
}
finally
{
_entryLock.ExitWriteLock();
}
if (priorEntry != null)
{
priorEntry.InvokeEvictionCallbacks();
}
if (!added)
{
entry.InvokeEvictionCallbacks();
}
StartScanForExpiredItems();
return(value);
}
public bool TryGetValue([NotNull] string key, IEntryLink link, out object value)
{
value = null;
CacheEntry expiredEntry = null;
bool found = false;
CheckDisposed();
_entryLock.EnterReadLock();
try
{
CacheEntry entry;
if (_entries.TryGetValue(key, out entry))
{
// Check if expired due to triggers, timers, etc. and if so, remove it.
if (entry.CheckExpired(_clock.UtcNow))
{
expiredEntry = entry;
}
else
{
// Refresh sliding expiration, etc.
entry.LastAccessed = _clock.UtcNow;
value = entry.Value;
found = true;
if (link != null)
{
// Copy triggers and AbsoluteExpiration to the link
if (entry.Context.Triggers != null)
{
link.AddExpirationTriggers(entry.Context.Triggers);
}
if (entry.Context.AbsoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(entry.Context.AbsoluteExpiration.Value);
}
}
}
}
}
finally
{
_entryLock.ExitReadLock();
}
if (expiredEntry != null)
{
// TODO: For efficiency queue this up for batch removal
RemoveEntry(expiredEntry);
}
StartScanForExpiredItems();
return(found);
}
private void SetInternal(CacheSetContext context, IEntryLink link, object value)
{
CacheEntry priorEntry = null;
var entry = new CacheEntry(context, value, _entryExpirationNotification);
bool added = false;
if (link != null)
{
// Copy triggers and AbsoluteExpiration to the link.
// We do this regardless of it gets cached because the triggers are associated with the value we'll return.
if (entry.Context.Triggers != null)
{
link.AddExpirationTriggers(entry.Context.Triggers);
}
if (entry.Context.AbsoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(entry.Context.AbsoluteExpiration.Value);
}
}
_entryLock.EnterWriteLock();
try
{
if (_entries.TryGetValue(context.Key, out priorEntry))
{
_entries.Remove(context.Key);
priorEntry.SetExpired(EvictionReason.Replaced);
}
if (!entry.CheckExpired(context.CreationTime))
{
_entries[context.Key] = entry;
entry.AttachTriggers();
added = true;
}
}
finally
{
_entryLock.ExitWriteLock();
}
if (priorEntry != null)
{
priorEntry.InvokeEvictionCallbacks();
}
if (!added)
{
entry.InvokeEvictionCallbacks();
}
StartScanForExpiredItems();
}
public bool TryGetValue([NotNull] string key, IEntryLink link, out object value)
{
value = null;
CacheEntry expiredEntry = null;
bool found = false;
CheckDisposed();
_entryLock.EnterReadLock();
try
{
CacheEntry entry;
if (_entries.TryGetValue(key, out entry))
{
// Check if expired due to triggers, timers, etc. and if so, remove it.
if (entry.CheckExpired(_clock.UtcNow))
{
expiredEntry = entry;
}
else
{
// Refresh sliding expiration, etc.
entry.LastAccessed = _clock.UtcNow;
value = entry.Value;
found = true;
if (link != null)
{
// Copy triggers and AbsoluteExpiration to the link
if (entry.Context.Triggers != null)
{
link.AddExpirationTriggers(entry.Context.Triggers);
}
if (entry.Context.AbsoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(entry.Context.AbsoluteExpiration.Value);
}
}
}
}
}
finally
{
_entryLock.ExitReadLock();
}
if (expiredEntry != null)
{
// TODO: For efficiency queue this up for batch removal
RemoveEntry(expiredEntry);
}
StartScanForExpiredItems();
return found;
}
public object Set([NotNull] string key, IEntryLink link, object state, [NotNull] Func<ICacheSetContext, object> create)
{
CheckDisposed();
CacheEntry priorEntry = null;
var now = _clock.UtcNow;
var context = new CacheSetContext(key) { State = state, CreationTime = now };
object value = create(context);
var entry = new CacheEntry(context, value, _entryExpirationNotification);
bool added = false;
if (link != null)
{
// Copy triggers and AbsoluteExpiration to the link.
// We do this regardless of it gets cached because the triggers are associated with the value we'll return.
if (entry.Context.Triggers != null)
{
link.AddExpirationTriggers(entry.Context.Triggers);
}
if (entry.Context.AbsoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(entry.Context.AbsoluteExpiration.Value);
}
}
_entryLock.EnterWriteLock();
try
{
if (_entries.TryGetValue(key, out priorEntry))
{
_entries.Remove(key);
priorEntry.SetExpired(EvictionReason.Replaced);
}
if (!entry.CheckExpired(now))
{
_entries[key] = entry;
entry.AttachTriggers();
added = true;
}
}
finally
{
_entryLock.ExitWriteLock();
}
if (priorEntry != null)
{
priorEntry.InvokeEvictionCallbacks();
}
if (!added)
{
entry.InvokeEvictionCallbacks();
}
StartScanForExpiredItems();
return value;
}
