// Notification raised after ADAL accessed the cache.
// If the HasStateChanged flag is set, ADAL changed the content of the cache
private void AfterAccessNotification(TokenCacheNotificationArgs args)
{
// if state changed
if (this.HasStateChanged)
{
// retrieve last write from the DB
_cache = TokenCacheEntries.FirstOrDefault(e => e.userObjId == _userObjId);
if (_cache == null)
{
_cache = new TokenCacheEntry
{
userObjId = _userObjId,
};
}
_cache.LastWrite = DateTime.Now;
_cache.cacheBits = Serialize();
TokenCacheEntries.RemoveAll(e => e.userObjId == _userObjId);
TokenCacheEntries.Add(_cache);
//// update the DB and the lastwrite
//db.Entry(Cache).State = Cache.TokenCacheEntryID == 0 ? EntityState.Added : EntityState.Modified;
//db.SaveChanges();
this.HasStateChanged = false;
}
}
public InMemoryTokenCache(string userObjectId)
{
// associate the cache to the current user of the web app
_userObjId = userObjectId;
this.AfterAccess = AfterAccessNotification;
this.BeforeAccess = BeforeAccessNotification;
this.BeforeWrite = BeforeWriteNotification;
// look up the entry in the DB
_cache = TokenCacheEntries.FirstOrDefault(c => c.userObjId == _userObjId);
// place the entry in memory
Deserialize(_cache?.cacheBits);
}
// Notification raised before ADAL accesses the cache.
// This is your chance to update the in-memory copy from the DB, if the in-memory version is stale
private void BeforeAccessNotification(TokenCacheNotificationArgs args)
{
if (_cache == null)
{
// first time access
_cache = TokenCacheEntries.FirstOrDefault(c => c.userObjId == _userObjId);
}
else
{
// retrieve last write from the DB
var dbCache = TokenCacheEntries.FirstOrDefault(c => c.userObjId == _userObjId);
// if the in-memory copy is older than the persistent copy, update the in-memory copy
if (dbCache.LastWrite > _cache.LastWrite)
{
_cache = dbCache;
}
}
Deserialize(_cache?.cacheBits);
}
