/// <summary>
/// Reads the cache data from the backend database.
/// </summary>
private void ReadCacheForSignedInUser()
{
if (_inMemoryCache == null) // first time access
{
_inMemoryCache = GetLatestUserRecordQuery().FirstOrDefault();
}
else
{
// retrieve last written record from the DB
var lastwriteInDb = GetLatestUserRecordQuery().Select(n => n.LastWrite).FirstOrDefault();
// if the persisted copy is newer than the in-memory copy
if (lastwriteInDb > _inMemoryCache.LastWrite)
{
// read from from storage, update in-memory copy
_inMemoryCache = GetLatestUserRecordQuery().FirstOrDefault();
}
}
// Send data to the TokenCache instance
_userTokenCache.DeserializeMsalV3((_inMemoryCache == null) ? null : _dataProtector.Unprotect(_inMemoryCache.CacheBits));
}
/// <summary>
/// Loads the application's tokens from session cache.
/// </summary>
private void LoadAppTokenCacheFromSession()
{
_httpContext.Session.LoadAsync().Wait();
s_sessionLock.EnterReadLock();
try
{
byte[] blob;
if (_httpContext.Session.TryGetValue(_appCacheId, out blob))
{
Debug.WriteLine($"INFO: Deserializing session {_httpContext.Session.Id}, cacheId {_appCacheId}");
_apptokenCache.DeserializeMsalV3(blob);
}
else
{
Debug.WriteLine($"INFO: cacheId {_appCacheId} not found in session {_httpContext.Session.Id}");
}
}
finally
{
s_sessionLock.ExitReadLock();
}
}
public void Load()
{
session.LoadAsync().Wait();
SessionLock.EnterReadLock();
try
{
byte[] blob;
if (session.TryGetValue(CacheId, out blob))
{
Debug.WriteLine($"INFO: Deserializing session {session.Id}, cacheId {CacheId}");
cache.DeserializeMsalV3(blob);
}
else
{
Debug.WriteLine($"INFO: cacheId {CacheId} not found in session {session.Id}");
}
}
finally
{
SessionLock.ExitReadLock();
}
}
/// <summary>
/// Loads the application's token from memory cache.
/// </summary>
private void LoadAppTokenCacheFromMemory()
{
// Ideally, methods that load and persist should be thread safe. MemoryCache.Get() is thread safe.
byte[] tokenCacheBytes = (byte[])memoryCache.Get(AppCacheId);
AppTokenCache.DeserializeMsalV3(tokenCacheBytes);
}
private void Load()
{
sessionLock.EnterReadLock();
tokenCache.DeserializeMsalV3((byte[])httpContext.Session[cacheId]);
sessionLock.ExitReadLock();
}
private void Load(string key, ITokenCache tokenCache)
{
var data = (byte[])_cache.Get(key);
tokenCache.DeserializeMsalV3(data);
}
