public override async Task <string> ProceedRequestAsync(string query, TimeSpan timeout)
{
var mappingTaskToUriGuidTuple = new ConcurrentDictionary <Task <string>, (string, Guid)>(
ClusterManager.EnumerateWhiteReplica().Select(uri =>
{
var guid = Guid.NewGuid();
var task = Task.Run(async() =>
{
var requestTask = WebRequestTask(uri, query, guid);
await Task.WhenAny(requestTask, Task.Delay(timeout));
if (requestTask.IsCompleted && !requestTask.IsFaulted)
{
return(requestTask.Result);
}
ClusterManager.MarkGrey(uri, query, TimeSpan.FromMilliseconds(500));
throw new TimeoutException();
});
return(new KeyValuePair <Task <string>, (string, Guid)>(task, (uri, guid)));
}));
var parallelTasks = new HashSet <Task <string> >(mappingTaskToUriGuidTuple.Keys);
while (parallelTasks.Any())
{
var completedTask = await Task.WhenAny(parallelTasks);
if (completedTask.IsFaulted)
{
parallelTasks.Remove(completedTask);
Log.Info($"Task [{query}] faulted with [{completedTask.Exception?.GetBaseException().Message}].");
}
else
{
foreach (var task in parallelTasks.Where(t => !t.IsCompleted))
{
var(uri, guid) = mappingTaskToUriGuidTuple[task];
ProceedCancelRequest(uri, guid);
}
return(completedTask.Result);
}
}
throw new TimeoutException();
}
public override async Task <string> ProceedRequestAsync(string query, TimeSpan timeout)
{
var whiteReplica = ClusterManager.EnumerateWhiteReplica().ToArray();
var uri = whiteReplica[randomGenerator.Next(whiteReplica.Length)];
var guid = Guid.NewGuid();
var requestTask = WebRequestTask(uri, query, guid);
await Task.WhenAny(requestTask, Task.Delay(timeout));
if (requestTask.IsCompleted && !requestTask.IsFaulted)
{
return(requestTask.Result);
}
ClusterManager.MarkGrey(uri, query, TimeSpan.FromMilliseconds(500));
throw new TimeoutException();
}
