async Task <T> ExecutePostAsync <T>(string requestUri, HttpContent content, bool handlerEncrypted = true) where T : class
{
HttpClient client = ConfigureHttpClient(handlerEncrypted);
TimeSpan timeSpan = _minimunTimeUntilFail;
if (content is StreamContent)
{
timeSpan = _maximunTimeUntilFail;
}
CancellationToken cts = new CancellationTokenSource(timeSpan).Token;
TimeoutPolicy timeOutPolicy = Policy.TimeoutAsync(timeSpan);
using (content)
using (HttpResponseMessage response = await timeOutPolicy.WrapAsync(_policy).ExecuteAsync(async() => await client.PostAsync(requestUri, content, cts)))
{
return(await ProcessResponse <T>(response));
}
}
/// <summary>
/// Build default circuit breaker, wait and retry and Timeout policy.
/// </summary>
/// <param name="transientPolicySettings">retry,timeout and circuit breaker settings.</param>
/// <returns>policy wrapper.</returns>
public virtual PolicyWrap <HttpResponseMessage> GetDefaultPolicy(TransientPolicySettings transientPolicySettings)
{
//Time out policy to set Http Client request timeout.
TimeoutPolicy timeoutPolicy = Policy.TimeoutAsync(TimeSpan.FromSeconds(transientPolicySettings.HttpTimeOut), timeoutStrategy: TimeoutStrategy.Pessimistic, TimeOutHandler);
//If http client requiest fails, it will be retried.
IAsyncPolicy <HttpResponseMessage> retryPolicy = Policy.HandleResult <HttpResponseMessage>(r => !r.IsSuccessStatusCode)
.Or <HttpRequestException>()
.WaitAndRetryAsync(transientPolicySettings.RetryAttempts, retryafter => TimeSpan.FromSeconds(Math.Pow(2, retryafter) / 2), OnRetry);
//Circuit breaker to fail fast.
IAsyncPolicy <HttpResponseMessage> cb = HttpPolicyExtensions
.HandleTransientHttpError()
.AdvancedCircuitBreakerAsync(
transientPolicySettings.CircuitBreakerSettings.FailureThreshold,
TimeSpan.FromSeconds(transientPolicySettings.CircuitBreakerSettings.SamplingDuration),
transientPolicySettings.CircuitBreakerSettings.MinimumThroughput,
TimeSpan.FromSeconds(transientPolicySettings.CircuitBreakerSettings.DurationOfBreak),
OnBreak,
OnReset,
OnHalfOpen);
//above policies are wrapped.
return(timeoutPolicy.WrapAsync(retryPolicy.WrapAsync(cb)));
}