private TServiceInterface Delay(
int iteration,
IDelayPolicy delayPolicy,
TServiceInterface provider,
InvokeInfo invokeInfo)
{
Thread.Sleep(delayPolicy.GetDelay(iteration));
return(RefreshProvider(provider, iteration, invokeInfo));
}
private async Task <TServiceInterface> DelayAsync(
int iteration,
IDelayPolicy delayPolicy,
TServiceInterface provider,
InvokeInfo invokeInfo)
{
await Task.Delay(delayPolicy.GetDelay(iteration)).ConfigureAwait(false);
return(RefreshProvider(provider, iteration, invokeInfo));
}
public async Task <TResponse> InvokeAsync <TResponse>(Func <TServiceInterface, Task <TResponse> > method, InvokeInfo invokeInfo = null)
{
TServiceInterface provider = RefreshProvider(null, 0, invokeInfo);
TResponse lastResponse = default(TResponse);
IDelayPolicy delayPolicy = DelayPolicyFactory();
var sw = Stopwatch.StartNew();
try
{
this.HandleOnCallBegin(invokeInfo);
Exception mostRecentException = null;
for (int i = 0; i < RetryCount + 1; i++)
{
try
{
this.HandleOnBeforeInvoke(i, invokeInfo);
TResponse response = await method(provider).ConfigureAwait(false);
this.HandleOnAfterInvoke(i, response, invokeInfo);
if (ResponseInRetryable(response))
{
lastResponse = response;
provider = await DelayAsync(i, delayPolicy, provider, invokeInfo).ConfigureAwait(false);
continue;
}
sw.Stop();
response = this.ExecuteResponseHandlers(response);
this.HandleOnCallSuccess(sw.Elapsed, response, (i + 1), invokeInfo);
return(response);
}
catch (Exception ex)
{
this.HandleOnException(ex, i, invokeInfo);
// determine whether to retry the service call
if (ExceptionIsRetryable(ex))
{
mostRecentException = ex;
provider = await DelayAsync(i, delayPolicy, provider, invokeInfo).ConfigureAwait(false);
}
else
{
throw;
}
}
}
if (mostRecentException != null)
{
if (RetryCount == 0)
{
throw mostRecentException;
}
var exception = this.RetryFailureExceptionFactory(this.RetryCount, mostRecentException, invokeInfo);
throw exception;
}
}
finally
{
DisposeProvider(provider, -1, invokeInfo);
}
return(lastResponse);
}