/// <summary>
/// 带重试的发送请求，直到判定成功或者超过次数。
/// </summary>
/// <typeparam name="T">内容类型</typeparam>
/// <param name="contextGenerator">创建目标HttpContext的回调</param>
/// <param name="token">取消标记</param>
/// <param name="maxRetryCount">最多重试次数。如果为null，则默认使用全局设置</param>
/// <param name="contextChecker">判断是否正确的响应，默认为判断 IsValid 为true</param>
/// <param name="retryIndicator">重试的时候将会通知</param>
/// <param name="sleepTime">休息时间</param>
/// <returns></returns>
public Task <HttpContext <T> > SendContextWithRetryAsync <T>(
[NotNull] Func <HttpContext <T> > contextGenerator,
CancellationToken token,
Func <HttpContext <T>, bool> contextChecker = null,
Action <int, HttpContext <T> > retryIndicator = null,
int?maxRetryCount = null,
int?sleepTime = null
) where T : class
{
return(Task <HttpContext <T> > .Factory.StartNew(() =>
{
if (contextGenerator == null)
{
throw new ArgumentNullException(nameof(contextGenerator));
}
if (contextChecker == null)
{
contextChecker = _ => _.IsValid();
}
HttpContext <T> context = null;
maxRetryCount = maxRetryCount ?? Setting.DefaultRetryLimit;
token.Register(() =>
{
context?.Abort();
});
for (int i = 0; i < maxRetryCount.Value; i++)
{
context = contextGenerator();
retryIndicator?.Invoke(i, context);
context.Send();
if (contextChecker(context))
{
return context;
}
if (i < maxRetryCount.Value)
{
Thread.Sleep(sleepTime ?? Setting.DefaultRetrySleepTime);
}
}
return context;
}));
}
/// <summary>
/// 带重试的发送请求，直到判定成功或者超过次数。
/// </summary>
/// <typeparam name="T">内容类型</typeparam>
/// <param name="contextGenerator">创建目标HttpContext的回调</param>
/// <param name="maxRetryCount">最多重试次数。如果为null，则默认使用全局设置</param>
/// <param name="contextChecker">判断是否正确的响应，默认为判断 IsValid 为true</param>
/// <param name="retryIndicator">重试的时候将会通知</param>
/// <param name="sleepTime">两次重试之间的休息时间（毫秒）</param>
/// <returns></returns>
public HttpContext <T> SendContextWithRetry <T>(
[NotNull] Func <HttpContext <T> > contextGenerator,
Func <HttpContext <T>, bool> contextChecker = null,
Action <int, HttpContext <T> > retryIndicator = null,
int?maxRetryCount = null,
int?sleepTime = null) where T : class
{
if (contextGenerator == null)
{
throw new ArgumentNullException(nameof(contextGenerator));
}
if (contextChecker == null)
{
contextChecker = _ => _.IsValid();
}
HttpContext <T> context = null;
maxRetryCount = maxRetryCount ?? Setting.DefaultRetryLimit;
for (int i = 0; i < maxRetryCount.Value; i++)
{
context = contextGenerator();
retryIndicator?.Invoke(i, context);
context.Send();
if (contextChecker(context))
{
return(context);
}
if (i < maxRetryCount.Value)
{
Thread.Sleep(sleepTime ?? Setting.DefaultRetrySleepTime);
}
}
return(context);
}