/// <summary>
/// Clear the queue.
/// </summary>
public void Clear()
{
if (_isBusy)
{
throw new InvalidOperationException();
}
while (queue.Count > 0)
{
var context = queue.Dequeue();
TaskCanceled?.Invoke(this, new TaskEventArgs(context.Tag));
}
}
private void TerminateTask(RunningTask runningTask)
{
Log.Debug($"Terminating task {runningTask}");
lock (_lock)
{
for (var i = 0; i < _runningTasks.Count; i++)
{
if (ReferenceEquals(_runningTasks[i].RunningTask, runningTask))
{
_cancelledTokenSources.Add(runningTask.CancellationTokenSource.Token);
runningTask.CancellationTokenSource.Cancel();
TaskCanceled?.Invoke(this, new TaskEventArgs(runningTask));
return;
}
}
}
}
public async Task <ResponseInfo> SendAsync(
Func <HttpRequestMessage> generator,
int maximalRetryAttempt = 5)
{
var policy = Policy
.Handle <HttpRequestException>()
.OrResult <ResponseInfo>(response =>
response.Status is >= HttpStatusCode.InternalServerError or HttpStatusCode.RequestTimeout)
.WaitAndRetryAsync(
maximalRetryAttempt,
attempt => TimeSpan.FromSeconds(attempt),
(result, span, attempt, _) => ReceiveFailed?.Invoke(result, span, attempt));
ResponseInfo info;
try
{
info = await policy.ExecuteAsync(async() =>
{
using var msg = generator();
using var res = await Client.SendAsync(msg);
return(await res.Content
.Decompress()
.ContinueWith(t => new ResponseInfo(t.Result, res.StatusCode)));
});
}
catch (TaskCanceledException)
{
TaskCanceled?.Invoke();
return(null);
}
catch (Exception e)
{
ExceptionThrown?.Invoke(e);
return(null);
}
return(info);
}
private void OnTaskCanceled(ITaskObserver task, object sender = null)
{
TaskCanceled?.Invoke(sender ?? this, new TaskModifiedEventArgs(task, TaskObserveStatus.Canceled));
}
private void OnTaskCanceled()
{
TaskCanceled?.Invoke(this, new ObservableTaskEventArgs(_task));
}