private static void GetIndexedEventsPromise()
{
var feed = DXFeed.GetInstance();
var tsPromise = feed.GetIndexedEventsPromise <IDxTimeAndSale>("IBM", IndexedEventSource.DEFAULT,
new CancellationTokenSource(TimeSpan.FromSeconds(2)).Token);
Console.WriteLine("TimeAndSale events:");
try {
foreach (var result in tsPromise.Result)
{
Console.WriteLine(result);
}
} catch (AggregateException ae) {
foreach (var exc in ae.InnerExceptions)
{
if (exc is OperationCanceledException)
{
Console.WriteLine("not found");
}
else
{
Console.WriteLine(exc);
}
}
}
var orderPromise = feed.GetIndexedEventsPromise <IDxOrder>("IBM", OrderSource.NTV,
new CancellationTokenSource(TimeSpan.FromSeconds(2)).Token);
Console.WriteLine("Order#NTV events:");
try {
foreach (var result in orderPromise.Result)
{
Console.WriteLine(result);
}
} catch (AggregateException ae) {
foreach (var exc in ae.InnerExceptions)
{
if (exc is OperationCanceledException)
{
Console.WriteLine("not found");
}
else
{
Console.WriteLine(exc);
}
}
}
}
private static void GetLastEventPromisesSample()
{
string[] symbols = { "C", "IBM", "MSFT" };
var feed = DXFeed.GetInstance();
var promises = feed.GetLastEventsPromises <IDxTrade>(
symbols,
new CancellationTokenSource(TimeSpan.FromSeconds(5)).Token);
// combine the list of promises into one with Task utility method and wait
try {
Task.WaitAll(promises.Cast <Task>().ToArray());
} catch (AggregateException ae) {
foreach (var exc in ae.InnerExceptions)
{
if (!(exc is OperationCanceledException))
{
Console.WriteLine(exc);
}
}
}
// now iterate the promises to retrieve results
Console.WriteLine("Last events for {0} symbols:", string.Join(", ", symbols));
foreach (var promise in promises)
{
// result received exceptionally if this event was not found
// so first check that task completes successfully
if (promise.Status == TaskStatus.RanToCompletion)
{
Console.WriteLine(promise.Result);
}
else
{
Console.WriteLine("not found");
}
}
}
