/// <summary>
/// Check MemoryCache to see if token is cached
/// </summary>
/// <param name="resourceId">Graph resource ID</param>
/// <param name="tenant">Graph tenant name</param>
/// <param name="userName">User identifier</param>
/// <param name="authenticationResult">Authentication result object</param>
/// <returns>True if token is cached</returns>
private bool TryGetAccessToken(string resourceId, string tenant, string userName, out AuthenticationResult authenticationResult)
{
trace.TraceInformation($"Getting cached access token for resource '{resourceId}'");
authenticationResult = (AuthenticationResult)this.accessTokenCache.Get(GetAccessTokenCacheKey(resourceId, tenant, userName));
trace.TraceInformation($"Token retrieved: {authenticationResult?.GetHashCode()}");
return((authenticationResult != null) && (authenticationResult.ExpiresOn > DateTime.UtcNow));
}
/// <summary>
/// Cache on-behalf-of user access token
/// </summary>
/// <param name="resourceId">Graph resource ID</param>
/// <param name="tenant">Graph tenant name</param>
/// <param name="userName">User identifier</param>
/// <param name="authenticationResult">Authentication result object</param>
private void SetAccessTokenCache(string resourceId, string tenant, string userName, AuthenticationResult authenticationResult)
{
trace.TraceInformation($"Setting cached access token for resource '{resourceId}'");
var cacheExpirationOptions =
new MemoryCacheEntryOptions
{
AbsoluteExpiration = DateTime.Now.AddMinutes(ExpiryMinutes),
Priority = CacheItemPriority.Normal
};
var res = (GetAccessTokenCacheKey(resourceId, tenant, userName), authenticationResult);
this.accessTokenCache.Set(res, DateTime.Now.ToString(), cacheExpirationOptions);
trace.TraceInformation($"Token set: {authenticationResult?.GetHashCode()}");
}