public async Task <HttpResponseMessage> SendAsync(HttpClient client, Uri address, CancellationToken cancellationToken)
{
var backoff = new ExponentialBackoff(_maximumRetries, _delay, _maximumDelay);
while (true)
{
HttpResponseMessage httpResponse = null;
try
{
httpResponse = await client.GetAsync(address, cancellationToken);
httpResponse.EnsureSuccessStatusCode();
return(httpResponse);
}
catch (Exception e)
{
httpResponse?.Dispose();
if (IsTransientError(e, httpResponse))
{
await backoff.Delay();
}
else
{
throw;
}
}
}
}
/// <summary>
/// Runs the function async with exponential backoff
/// </summary>
/// <param name="func"></param>
/// <returns></returns>
public async Task RunAsync(Func <Task> func)
{
ExponentialBackoff backoff = new ExponentialBackoff(this.Config);
bool shouldContinue = true;
while (shouldContinue)
{
try
{
await func();
shouldContinue = false;
}
catch (Exception ex)
{
Debug.WriteLine($"Exception raised is: {ex.GetType().ToString()} – Message: {ex.Message}");
if (this.Config.ExceptionHandlingLogic(ex))
{
await backoff.Delay();
}
else
{
throw ex;
}
}
}
}
/// <summary>
/// Runs the function async with exponential backoff
/// </summary>
/// <param name="func"></param>
/// <returns></returns>
public async Task <T> RunAsync <T>(Func <Task <T> > func)
{
ExponentialBackoff backoff = new ExponentialBackoff(this.Config);
while (true)
{
try
{
return(await func());
}
catch (Exception ex)
{
Debug.WriteLine($"Exception raised is: {ex.GetType().ToString()} – Message: {ex.Message}");
if (this.Config.ExceptionHandlingLogic != null && this.Config.ExceptionHandlingLogic(ex))
{
await backoff.Delay();
}
else
{
throw ex;
}
}
}
}
public async Task RunAsync(Func<Task> func, CancellationToken cancellationToken = default(CancellationToken))
{
ExponentialBackoff backoff = new ExponentialBackoff(this.maxRetries, this.delayMilliseconds, this.maxDelayMilliseconds);
retry:
try
{
await func();
}
catch (Exception ex) when (ex is TimeoutException || ex is FabricTransientException)
{
await backoff.Delay(cancellationToken);
goto retry;
}
}
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
backoff = new ExponentialBackoff(
maxRetryAttempts,
DelayMilliseconds,
MaxDelayMilliseconds);
while (true)
{
var response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
if ((int)response.StatusCode < 500)
{
return(response);
}
await backoff.Delay().ConfigureAwait(false);
}
}
public async Task Reconnect()
{
reconnecting = true;
ExponentialBackoff backoff = new ExponentialBackoff();
while (reconnecting)
{
try
{
await backoff.Delay();
await xmppCon.ConnectAsync(cts.Token);
reconnecting = false;
}
catch (Exception)
{
}
}
}
public async Task RunAsync(Func <Task> func)
{
ExponentialBackoff backoff = new ExponentialBackoff(this.maxRetries,
this.delayMilliseconds,
this.maxDelayMilliseconds);
retry:
try
{
await func();
}
catch (Exception ex) when(ex is TimeoutException ||
ex is System.Net.Http.HttpRequestException)
{
Debug.WriteLine("Exception raised is: " +
ex.GetType().ToString() +
" –Message: " + ex.Message +
" -- Inner Message: " +
ex.InnerException.Message);
await backoff.Delay();
goto retry;
}
}
