public void TestWorkstepAsyncExecution()
{
// defines and executes a workstep synchronously and asynchronously
var s1A = new SequentialSubstep1();
s1A.Initialise(_workContext);
// synchronous execution
var t1 = new T1 {
a = 31
};
T2 t2A = s1A.Execute(t1).Result;
Assert.AreEqual(31, t2A.b);
// asynchronous execution
// note: there are 3 ways to complete an async operation
// 1. wait method
t1.a = 42;
AsyncResult <WorkflowOutput <T2> > ar1 = s1A.BeginExecute(t1, null);
T2 t2B1 = ar1.EndInvoke().Result;
Assert.AreEqual(42, t2B1.b);
// 2. poll method
t1.a = 53;
AsyncResult <WorkflowOutput <T2> > ar2 = s1A.BeginExecute(t1, null);
while (!ar2.IsCompleted)
{
Thread.Sleep(100);
}
T2 t2B2 = ar2.EndInvoke().Result;
Assert.AreEqual(53, t2B2.b);
// 3. callback method
t1.a = 64;
bool ar3Callback = false;
T2 t2B3; t2B3.b = 0;
s1A.BeginExecute(
t1,
delegate(IAsyncResult ar)
{
ar3Callback = true;
var ar3Temp = (AsyncResult <WorkflowOutput <T2> >)ar;
t2B3 = ar3Temp.EndInvoke().Result;
});
while (!ar3Callback)
{
Thread.Sleep(100);
}
Assert.AreEqual(64, t2B3.b);
}