/// <summary>
/// Creates a new instance of <see cref="MsalCacheHelper"/>. To configure MSAL to use this cache persistence, call <see cref="RegisterCache(ITokenCache)"/>
/// </summary>
/// <param name="storageCreationProperties">Properties to use when creating storage on disk.</param>
/// <param name="logger">Passing null uses a default logger</param>
/// <returns>A new instance of <see cref="MsalCacheHelper"/>.</returns>
public static async Task <MsalCacheHelper> CreateAsync(StorageCreationProperties storageCreationProperties, TraceSource logger = null)
{
if (storageCreationProperties is null)
{
throw new ArgumentNullException(nameof(storageCreationProperties));
}
// We want CrossPlatLock around this operation so that we don't have a race against first read of the file and creating the watcher
using (CreateCrossPlatLock(storageCreationProperties))
{
// Cache the list of accounts
var ts = logger == null ? s_staticLogger.Value : new TraceSourceLogger(logger);
var accountIdentifiers = await GetAccountIdentifiersAsync(storageCreationProperties, ts).ConfigureAwait(false);
var cacheWatcher = new FileSystemWatcher(storageCreationProperties.CacheDirectory, storageCreationProperties.CacheFileName);
var helper = new MsalCacheHelper(storageCreationProperties, logger, accountIdentifiers, cacheWatcher);
try
{
cacheWatcher.EnableRaisingEvents = true;
}
catch (PlatformNotSupportedException)
{
helper._logger.LogError(
"Cannot fire the CacheChanged event because the target framework does not support FileSystemWatcher. " +
"This is a known issue in Xamarin / Mono.");
}
return(helper);
}
}
/// <summary>
/// Creates a new instance of <see cref="MsalCacheHelper"/>.
/// </summary>
/// <param name="storageCreationProperties">Properties to use when creating storage on disk.</param>
/// <param name="logger">Passing null uses a default logger</param>
/// <returns>A new instance of <see cref="MsalCacheHelper"/>.</returns>
public static async Task <MsalCacheHelper> CreateAsync(StorageCreationProperties storageCreationProperties, TraceSource logger = null)
{
// We want CrossPlatLock around this operation so that we don't have a race against first read of the file and creating the watcher
using (CreateCrossPlatLock(storageCreationProperties))
{
// Cache the list of accounts
var accountIdentifiers = await GetAccountIdentifiersAsync(storageCreationProperties).ConfigureAwait(false);
var cacheWatcher = new FileSystemWatcher(storageCreationProperties.CacheDirectory, storageCreationProperties.CacheFileName);
var helper = new MsalCacheHelper(storageCreationProperties, logger, accountIdentifiers, cacheWatcher);
cacheWatcher.EnableRaisingEvents = true;
return(helper);
}
}