public static IClientMessage GetResult(IFuture <IClientMessage> future, int?timeout = null)
{
if (timeout.HasValue)
{
return(future.GetResult(timeout.Value));
}
return(future.GetResult(TaskOperationTimeOutMilliseconds));
}
public void SubmitReturnsFutureThatReturnsResultOfCompletedAction()
{
var runnable = MockRepository.GenerateStub <IRunnable>();
IFuture <Void> future = ExecutorService.Submit(runnable);
future.GetResult();
runnable.AssertWasCalled(c => c.Run());
JoinPool(ExecutorService);
}
public T Call()
{
IFuture <T> ftask = _exec.Submit(_func);
try
{
return(ftask.GetResult(_duration));
}
finally
{
ftask.Cancel(true);
}
}
public static IFuture Bind <T> (this IFuture future, Expression <Func <T> > target)
{
var member = BoundMember.New(target);
future.RegisterOnComplete((_) => {
Exception error;
object result;
if (future.GetResult(out result, out error))
{
((IBoundMember)member).Value = result;
}
});
return(future);
}
public static bool CheckForFailure(this IFuture future, params Type[] failureTypes)
{
object result;
Exception error;
if (future.GetResult(out result, out error))
{
if (error != null)
{
foreach (Type type in failureTypes)
{
if (type.IsInstanceOfType(error))
{
return(true);
}
}
}
}
return(false);
}
public static ClientMessage GetResult(IFuture <ClientMessage> future, TimeSpan timeout)
{
return(future.GetResult((int)timeout.TotalMilliseconds));
}
public static ClientMessage GetResult(IFuture <ClientMessage> future, int timeout)
{
return(future.GetResult(timeout));
}
public static ClientMessage GetResult(IFuture <ClientMessage> future)
{
return(future.GetResult(Timeout.Infinite));
}
private T DoInvokeAny <T>(IEnumerable tasks, int count, bool timed, TimeSpan durationToWait, Converter <object, IRunnableFuture <T> > converter)
{
if (tasks == null)
{
throw new ArgumentNullException("tasks");
}
List <IFuture <T> > futures = count > 0 ? new List <IFuture <T> >(count) : new List <IFuture <T> >();
ExecutorCompletionService <T> ecs = new ExecutorCompletionService <T>(this);
TimeSpan duration = durationToWait;
// For efficiency, especially in executors with limited
// parallelism, check to see if previously submitted tasks are
// done before submitting more of them. This interleaving
// plus the exception mechanics account for messiness of main
// loop.
try
{
// Record exceptions so that if we fail to obtain any
// result, we can throw the last exception we got.
ExecutionException ee = null;
DateTime lastTime = (timed) ? DateTime.Now : new DateTime(0);
IEnumerator it = tasks.GetEnumerator();
bool hasMoreTasks = it.MoveNext();
if (!hasMoreTasks)
{
throw new ArgumentException("No tasks passed in.");
}
futures.Add(ecs.Submit(converter(it.Current)));
int active = 1;
for (;;)
{
IFuture <T> f = ecs.Poll();
if (f == null)
{
if (hasMoreTasks && (hasMoreTasks = it.MoveNext()))
{
futures.Add(ecs.Submit(converter(it.Current)));
++active;
}
else if (active == 0)
{
break;
}
else if (timed)
{
f = ecs.Poll(duration);
if (f == null)
{
throw new TimeoutException();
}
//TODO: done't understand what are we doing here. Useless!? -K.X.
duration = duration.Subtract(DateTime.Now.Subtract(lastTime));
lastTime = DateTime.Now;
}
else
{
f = ecs.Take();
}
}
if (f != null)
{
--active;
try
{
return(f.GetResult());
}
catch (ThreadInterruptedException)
{
throw;
}
catch (ExecutionException eex)
{
ee = eex;
}
catch (SystemException rex)
{
ee = new ExecutionException(rex);
}
}
}
if (ee == null)
{
ee = new ExecutionException();
}
throw ee;
}
finally
{
foreach (IFuture <T> future in futures)
{
future.Cancel(true);
}
}
}
public static IClientMessage GetResult(IFuture<IClientMessage> future, int? timeout = null)
{
if (timeout.HasValue) return future.GetResult(timeout.Value);
return future.GetResult(TaskOperationTimeOutMilliseconds);
}
public static IClientMessage GetResult(IFuture<IClientMessage> future, int? timeout = null)
{
return future.GetResult(timeout ?? TaskOperationTimeOutMilliseconds);
}
static void Main(string[] args)
{
IExecutorService executorService = Executors.NewFixedThreadPool(THREAD_POOL_SIZE);
IFuture <int> f1 = executorService.Submit <int>(GenerateNumbers);
IFuture <string> f2 = executorService.Submit <string>(PrintCharacters);
IFuture <int> f3 = executorService.Submit <int>(PrintArray);
Console.WriteLine("Numbers generated till {0}", f1.GetResult());
Console.WriteLine("Original String {0}", f2.GetResult());
Console.WriteLine("Array Count {0}", f3.GetResult());
Console.WriteLine("---------");
Console.WriteLine("Calculating sums...");
var futures = new List <IFuture <long> >();
// Call without method arguments
for (int i = 0; i < 20000; i++)
{
SumNumbers sumNumbers = new SumNumbers(100 + i);
IFuture <long> submit = executorService.Submit <long>(sumNumbers.CalculateSum);
futures.Add(submit);
}
long sum = 0;
foreach (var future in futures)
{
sum += future.GetResult();
}
Console.WriteLine("Sum = " + sum);
futures.Clear();
Console.WriteLine("---------");
Console.WriteLine("Calculating sums...");
// Call with method arguments
for (int i = 0; i < 20000; i++)
{
SumNumbers2 sumNumbers2 = new SumNumbers2();
int i1 = i; // copy to local variable for closure.
IFuture <long> submit =
executorService.Submit(() => sumNumbers2.CalculateSumWithArgsAndReturnValue(100 + i1));
futures.Add(submit);
}
sum = 0;
foreach (var future in futures)
{
sum += future.GetResult();
}
Console.WriteLine("Sum = " + sum);
//Say this was created at runtime and we don't know the type or parameter values at compile time.
object obj = new SumNumbers2();
object[] parameters = new object[] { 100 };
//Find the method we want to invoke
MethodInfo methodInfo = ReflectionUtils.GetMethod(obj.GetType(),
"CalculateSumWithArgsAndReturnValue",
ReflectionUtils.GetTypes(parameters));
//Use expression trees to generate code to invoke method and assign to a delegate.
LateBoundMethod methodCallback = DelegateFactory.Create(methodInfo);
IFuture <object> futureLong = executorService.Submit(() => methodCallback(obj, parameters));
var result = futureLong.GetResult();
Console.WriteLine("LateBoundMethod Style : Result = " + result);
///Use Spring's IL generation to invoke method dynamically.
IDynamicMethod method = DynamicMethod.Create(methodInfo);
IFuture <object> futureLongViaDM = executorService.Submit(() => method.Invoke(obj, parameters));
var resultViaDM = futureLongViaDM.GetResult();
Console.WriteLine("Spring's IDynamicMethod Style: Result = " + resultViaDM);
// This will make the executor accept no new threads
// and finish all existing threads in the queue
executorService.Shutdown();
Console.WriteLine("Hit return to exit");
Console.ReadLine();
}
