private static void GetResponses(
IResponses responses,
int numberResponsesToWait,
List <Task <IResponse> > tasks,
List <CancellationTokenSource> cancellations,
bool notNull)
{
try {
int countMessages = 0;
while (countMessages < numberResponsesToWait)
{
int index = Task.WaitAny(tasks.ToArray());
if (index < 0)
{
return;
}
if (notNull)
{
if (tasks[index].Result != null)
{
lock (responses) {
responses.Add(tasks[index].Result);
countMessages++;
}
}
}
else
{
lock (responses) {
responses.Add(tasks[index].Result);
countMessages++;
}
}
lock (cancellations) {
// cancel task
cancellations[index].Cancel();
cancellations.RemoveAt(index);
}
lock (tasks) {
tasks.RemoveAt(index);
}
}
// Cancel remaining sub-tasks
MessageServiceClient.CancelSubTasks(cancellations);
} catch (Exception e) {
Log.Error(e.Message);
}
}
public ServerMessageWrapper(Uri myUrl, IProtocol protocol, int minDelay, int maxDelay)
{
this.url = myUrl;
this.minDelay = minDelay;
this.maxDelay = maxDelay;
this.frozen = false;
// create tcp channel
this.channel = new TcpChannel(myUrl.Port);
ChannelServices.RegisterChannel(this.channel, false);
Log.Info("TCP channel created.");
// create MessageServiceServer
this.ServiceServer = new MessageServiceServer(protocol, minDelay, maxDelay);
// create MessageServiceClient
this.ServiceClient = new MessageServiceClient(this.channel);
}
public IResponses RequestMulticast(
IMessage message,
Uri[] urls,
int numberResponsesToWait,
int timeout,
bool notNull)
{
// block if frozen
this.BlockFreezeState(message);
if (urls.Length == 0)
{
return(new Responses());
}
Log.Debug($"Multicast Request called with parameters: message: {message}, url: {urls},"
+ $"numberResponsesToWait: {numberResponsesToWait}, timeout: {timeout}");
if (numberResponsesToWait > urls.Length)
{
return(new Responses());
}
else if (numberResponsesToWait < 0)
{
numberResponsesToWait = urls.Length;
}
List <Task <IResponse> > tasks = new List <Task <IResponse> >();
List <CancellationTokenSource> cancellations = new List <CancellationTokenSource>();
foreach (Uri url in urls)
{
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
// Create Task and run async
Task <IResponse> task = Task <IResponse> .Factory.StartNew(() => {
using (cancellationTokenSource.Token.Register(() => Log.Debug("Task cancellation requested"))) {
return(this.Request(message, url));
}
}, cancellationTokenSource.Token);
lock (tasks) {
tasks.Add(task);
}
lock (cancellations) {
cancellations.Add(cancellationTokenSource);
}
}
// Wait until numberResponsesToWait
IResponses responses = new Responses();
CancellationTokenSource cancellationTs = new CancellationTokenSource();
Task getResponses = Task.Factory.StartNew(
() => { using (cancellationTs.Token.Register(() => { MessageServiceClient.CancelSubTasks(cancellations); })) {
GetResponses(responses, numberResponsesToWait, tasks, cancellations, notNull);
} },
cancellationTs.Token);
try {
bool taskCompleted = timeout < 0 ? getResponses.Wait(-1) : getResponses.Wait(timeout);
if (taskCompleted)
{
Log.Debug($"Multicast response: {responses}");
return(responses);
}
cancellationTs.Cancel();
} catch (Exception e) {
Log.Error(e.Message);
}
Log.Error("Multicast Request: Timeout, abort thread request.");
return(responses);
}