private IList <Task <IDictionary <string, object> > > ExecuteBatchRequest(IList <object> requests,
string sessionToken,
CancellationToken cancellationToken)
{
var tasks = new List <Task <IDictionary <string, object> > >();
int batchSize = requests.Count;
var tcss = new List <TaskCompletionSource <IDictionary <string, object> > >();
for (int i = 0; i < batchSize; ++i)
{
var tcs = new TaskCompletionSource <IDictionary <string, object> >();
tcss.Add(tcs);
tasks.Add(tcs.Task);
}
var command = new AVCommand("/batch",
method: "POST",
sessionToken: sessionToken,
data: new Dictionary <string, object> {
{ "requests", requests }
});
commandRunner.RunCommandAsync(command, cancellationToken: cancellationToken).ContinueWith(t => {
if (t.IsFaulted || t.IsCanceled)
{
foreach (var tcs in tcss)
{
if (t.IsFaulted)
{
tcs.TrySetException(t.Exception);
}
else if (t.IsCanceled)
{
tcs.TrySetCanceled();
}
}
return;
}
var resultsArray = AVClient.As <IList <object> >(t.Result.Item2["results"]);
int resultLength = resultsArray.Count;
if (resultLength != batchSize)
{
foreach (var tcs in tcss)
{
tcs.TrySetException(new InvalidOperationException(
"Batch command result count expected: " + batchSize + " but was: " + resultLength + "."));
}
return;
}
for (int i = 0; i < batchSize; ++i)
{
var result = resultsArray[i] as Dictionary <string, object>;
var tcs = tcss[i];
if (result.ContainsKey("success"))
{
tcs.TrySetResult(result["success"] as IDictionary <string, object>);
}
else if (result.ContainsKey("error"))
{
var error = result["error"] as IDictionary <string, object>;
long errorCode = (long)error["code"];
tcs.TrySetException(new AVException((AVException.ErrorCode)errorCode, error["error"] as string));
}
else
{
tcs.TrySetException(new InvalidOperationException(
"Invalid batch command response."));
}
}
});
return(tasks);
}