public virtual async Task <IAsyncEnumerable <T> > AsEnumerableAsync()
{
// The AsEnumerableAsync method always returns a value (never is null)
// and we are not able to check if it is empty before starting enumerating it,
// so we will start enumerate it and if there's at least one value, it is valid.
// TODO: Peek only a value instead of enumerating completely
var cacheEnumerable = await Cache.AsEnumerableAsync().ConfigureAwait(false);
var cacheValues = await cacheEnumerable.ToArrayAsync().ConfigureAwait(false);
if (cacheValues.Length > 0)
{
return(new AsyncEnumerableWrapper <T>(cacheValues));
}
var sourceEnumerable = await Source.AsEnumerableAsync().ConfigureAwait(false);
var sourceValues = await sourceEnumerable.ToArrayAsync().ConfigureAwait(false);
foreach (var sourceValue in sourceValues)
{
await Cache.AddAsync(sourceValue).ConfigureAwait(false);
}
return(new AsyncEnumerableWrapper <T>(sourceValues));
}
/// <summary>
/// Updates an existing scope.
/// </summary>
/// <param name="scope">The scope to update.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> that can be used to abort the operation.</param>
/// <returns>
/// A <see cref="Task"/> that can be used to monitor the asynchronous operation.
/// </returns>
public virtual async Task UpdateAsync([NotNull] TScope scope, CancellationToken cancellationToken = default)
{
if (scope == null)
{
throw new ArgumentNullException(nameof(scope));
}
var results = await ValidateAsync(scope, cancellationToken);
if (results.Any(result => result != ValidationResult.Success))
{
var builder = new StringBuilder();
builder.AppendLine("One or more validation error(s) occurred while trying to update an existing scope:");
builder.AppendLine();
foreach (var result in results)
{
builder.AppendLine(result.ErrorMessage);
}
throw new OpenIddictExceptions.ValidationException(builder.ToString(), results);
}
await Store.UpdateAsync(scope, cancellationToken);
if (!Options.CurrentValue.DisableEntityCaching)
{
await Cache.RemoveAsync(scope, cancellationToken);
await Cache.AddAsync(scope, cancellationToken);
}
}
public virtual async IAsyncEnumerable <T> AsEnumerableAsync([EnumeratorCancellation] CancellationToken cancellationToken = default)
{
// The AsEnumerableAsync method always returns a value (never is null)
// and we are not able to check if it is empty before starting enumerating it,
// so we will start enumerate it and if there's at least one value, it is valid.
// TODO: Peek only a value instead of enumerating completely
var cacheEnumerable = Cache.AsEnumerableAsync(cancellationToken);
var cacheValues = await cacheEnumerable.ToArrayAsync(cancellationToken).ConfigureAwait(false);
if (cacheValues.Length > 0)
{
foreach (var cacheValue in cacheValues)
{
yield return(cacheValue);
}
}
else
{
var sourceEnumerable = Source.AsEnumerableAsync(cancellationToken);
var sourceValues = await sourceEnumerable.ToArrayAsync(cancellationToken).ConfigureAwait(false);
foreach (var sourceValue in sourceValues)
{
await Cache.AddAsync(sourceValue, cancellationToken).ConfigureAwait(false);
}
foreach (var sourceValue in sourceValues)
{
yield return(sourceValue);
}
}
}
private static async Task RunCacheTest(Cache cache)
{
await cache.ConnectAsync();
Console.WriteLine("Enter 'key=value' to add a value to the cache.");
Console.WriteLine("Enter 'key' to get a value from the cache.");
Console.WriteLine("Enter '-key' to delete a value from the cache.");
string line = null;
while ((line = Console.ReadLine()) != null)
{
var values = line.Split('=');
if (values.Length == 2)
{
string key = values[0].Trim();
string value = values[1].Trim();
await cache.AddAsync(key, value);
Console.WriteLine("Added '{0}' to the cache with value '{1}'.", key, value);
}
else if (line.StartsWith("-"))
{
string key = line.Substring(1).Trim();
await cache.DeleteAsync(key);
Console.WriteLine("Deleting entry for key '{0}'", key);
}
else
{
string key = line.Trim();
Console.WriteLine("Value for '{0}' is " + cache.Get(key), key);
}
}
}
/// <summary>
/// This method adds object in the cache using async api
/// </summary>
/// <param name="key"> String key to be added in cache</param>
/// <param name="customer"> Instance of Customer that will be added to cache</param>
private static void AddObjectToCacheAsynchronous(string key, Customer customer)
{
//Adding item asynchronously
//Another way is by creating a CacheItem object
_cache.AddAsync(key, customer, new AsyncItemAddedCallback(OnItemAdded), string.Empty, string.Empty);
// Wait for the callback.
Thread.Sleep(1000);
}
private async Task SetLastSignupDateAsync(DateTime value)
{
await Cache.RemoveAsync($"{UserHostAddress}:LastSignupDate");
if (value > DateTime.MinValue)
{
await Cache.AddAsync($"{UserHostAddress}:LastSignupDate", value,
value.AddMinutes(SharedBusinessLogic.SharedOptions.MinSignupMinutes));
}
}
protected async Task SetLastPasswordResetDateAsync(DateTime value)
{
await Cache.RemoveAsync($"{UserHostAddress}:LastPasswordResetDate");
if (value > DateTime.MinValue)
{
await Cache.AddAsync($"{UserHostAddress}:LastPasswordResetDate", value,
value.AddMinutes(SharedBusinessLogic.SharedOptions.MinPasswordResetMinutes));
}
}
/// <summary>
/// Creates a new scope.
/// </summary>
/// <param name="scope">The scope to create.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> that can be used to abort the operation.</param>
/// <returns>
/// A <see cref="ValueTask"/> that can be used to monitor the asynchronous operation.
/// </returns>
public virtual async ValueTask CreateAsync(TScope scope, CancellationToken cancellationToken = default)
{
if (scope is null)
{
throw new ArgumentNullException(nameof(scope));
}
var results = await GetValidationResultsAsync(scope, cancellationToken);
if (results.Any(result => result != ValidationResult.Success))
{
var builder = new StringBuilder();
builder.AppendLine(SR.GetResourceString(SR.ID0222));
builder.AppendLine();
foreach (var result in results)
{
builder.AppendLine(result.ErrorMessage);
}
throw new OpenIddictExceptions.ValidationException(builder.ToString(), results);
}
await Store.CreateAsync(scope, cancellationToken);
if (!Options.CurrentValue.DisableEntityCaching)
{
await Cache.AddAsync(scope, cancellationToken);
}
async Task <ImmutableArray <ValidationResult> > GetValidationResultsAsync(
TScope scope, CancellationToken cancellationToken)
{
var builder = ImmutableArray.CreateBuilder <ValidationResult>();
await foreach (var result in ValidateAsync(scope, cancellationToken))
{
builder.Add(result);
}
return(builder.ToImmutable());
}
}
/// <summary>
/// Asynchronously load a specific page.
/// </summary>
/// <param name="url">The URL of the page to load. Cannot be null.</param>
/// <param name="shortDescrip">A short description that can be used in status updates. If null, no update will be given.</param>
/// <param name="caching">Indicator of whether to query the cache for the requested page.</param>
/// <param name="token">Cancellation token.</param>
/// <param name="shouldCache">Indicates whether the result of this page load should be cached.</param>
/// <returns>Returns an HTML document, if it can be loaded.</returns>
/// <exception cref="ArgumentNullException">If url is null or empty.</exception>
/// <exception cref="ArgumentException">If url is not a valid absolute url.</exception>
private async Task <string> GetUrlContent(Uri uri, string url, string shortDescrip,
CachingMode caching, ShouldCache shouldCache, SuppressNotifications suppressNotifications, CancellationToken token)
{
string result = null;
int tries = 0;
DateTime expires = CacheInfo.DefaultExpiration;
NotifyStatusChange(PageRequestStatusType.Requested, url, shortDescrip, null, suppressNotifications);
// Limit to no more than N parallel requests
await ss.WaitAsync(token).ConfigureAwait(false);
try
{
Cookie cookie = ForumCookies.GetCookie(uri);
if (cookie != null)
{
ClientHandler.CookieContainer.Add(uri, cookie);
}
HttpResponseMessage response;
Task <HttpResponseMessage> getResponseTask = null;
do
{
token.ThrowIfCancellationRequested();
if (tries > 0)
{
// Delay any additional attempts after the first.
await Task.Delay(retryDelay, token).ConfigureAwait(false);
// Notify the user if we're re-trying to load the page.
NotifyStatusChange(PageRequestStatusType.Retry, url, shortDescrip, null, suppressNotifications);
}
tries++;
try
{
getResponseTask = client.GetAsync(uri, token).TimeoutAfter(timeout, token);
Debug.WriteLine($"Get URI {uri} task ID: {getResponseTask.Id}");
using (response = await getResponseTask.ConfigureAwait(false))
{
if (response.IsSuccessStatusCode)
{
result = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
// Get expires value
// Cannot get Expires value until we move to .NET Standard 2.0.
// If we get a successful result, we're done.
break;
}
else if (PageLoadFailed(response))
{
NotifyStatusChange(PageRequestStatusType.Failed, url,
GetFailureMessage(response, shortDescrip, url), null, suppressNotifications);
return(null);
}
else if (PageWasMoved(response))
{
url = response.Content.Headers.ContentLocation.AbsoluteUri;
uri = new Uri(url);
}
}
}
catch (OperationCanceledException)
{
if (token.IsCancellationRequested)
{
// user request
throw;
}
else
{
// timeout via cancellation
Debug.WriteLine($"Attempt to load {shortDescrip} timed out/self-cancelled (TA). Tries={tries}");
}
}
catch (TimeoutException)
{
Debug.WriteLine($"Attempt to load {shortDescrip} timed out. Tries={tries}");
}
catch (HttpRequestException e)
{
NotifyStatusChange(PageRequestStatusType.Error, url, shortDescrip, e, suppressNotifications);
throw;
}
} while (tries < retryLimit);
Debug.WriteLine($"Finished getting URI {uri} task ID: {getResponseTask.Id}");
if (result == null && tries >= retryLimit)
{
client.CancelPendingRequests();
}
}
catch (OperationCanceledException)
{
// If it's not a user-requested cancellation, generate a failure message.
if (!token.IsCancellationRequested)
{
NotifyStatusChange(PageRequestStatusType.Failed, url, shortDescrip, null, suppressNotifications);
}
throw;
}
finally
{
ss.Release();
}
token.ThrowIfCancellationRequested();
if (result == null)
{
NotifyStatusChange(PageRequestStatusType.Failed, url, shortDescrip, null, suppressNotifications);
return(null);
}
if (shouldCache == ShouldCache.Yes)
{
await Cache.AddAsync(url, result, expires);
}
NotifyStatusChange(PageRequestStatusType.Loaded, url, shortDescrip, null, suppressNotifications);
return(result);
}