public void Should_control_executions_per_specification(int maxParallelization, int maxQueuingActions, int totalActions, bool cancelQueuing, bool cancelExecuting, string scenario)
{
if (totalActions < 0)
{
throw new ArgumentOutOfRangeException(nameof(totalActions));
}
MaxParallelization = maxParallelization;
MaxQueuingActions = maxQueuingActions;
TotalActions = totalActions;
Scenario = $"MaxParallelization {maxParallelization}; MaxQueuing {maxQueuingActions}; TotalActions {totalActions}; CancelQueuing {cancelQueuing}; CancelExecuting {cancelExecuting}: {scenario}";
IBulkheadPolicy bulkhead = GetBulkhead(maxParallelization, maxQueuingActions);
using (bulkhead)
{
BulkheadForStats = bulkhead;
// Set up delegates which we can track whether they've started; and control when we allow them to complete (to release their semaphore slot).
Actions = new TraceableAction[totalActions];
for (int i = 0; i < totalActions; i++)
{
Actions[i] = new TraceableAction(i, StatusChangedEvent, TestOutputHelper);
}
// Throw all the delegates at the bulkhead simultaneously.
Tasks = new Task[totalActions];
for (int i = 0; i < totalActions; i++)
{
Tasks[i] = ExecuteOnBulkhead(bulkhead, Actions[i]);
}
OutputStatus("Immediately after queueing...");
// Assert the expected distributions of executing, queuing, rejected and completed - when all delegates thrown at bulkhead.
ExpectedCompleted = 0;
ExpectedCancelled = 0;
ExpectedExecuting = Math.Min(totalActions, maxParallelization);
ExpectedRejects = Math.Max(0, totalActions - maxParallelization - maxQueuingActions);
ExpectedQueuing = Math.Min(maxQueuingActions, Math.Max(0, totalActions - maxParallelization));
ExpectedBulkheadFree = maxParallelization - ExpectedExecuting;
ExpectedQueueFree = maxQueuingActions - ExpectedQueuing;
try
{
Within(CohesionTimeLimit, ActualsMatchExpecteds);
}
finally
{
OutputStatus("Expected initial state verified...");
}
// Complete or cancel delegates one by one, and expect others to take their place (if a slot released and others remain queueing); until all work is done.
while (ExpectedExecuting > 0)
{
if (cancelQueuing)
{
TestOutputHelper.WriteLine("Cancelling a queueing task...");
Actions.First(a => a.Status == TraceableActionStatus.QueueingForSemaphore).Cancel();
ExpectedCancelled++;
ExpectedQueuing--;
ExpectedQueueFree++;
cancelQueuing = false;
}
else if (cancelExecuting)
{
TestOutputHelper.WriteLine("Cancelling an executing task...");
Actions.First(a => a.Status == TraceableActionStatus.Executing).Cancel();
ExpectedCancelled++;
if (ExpectedQueuing > 0)
{
ExpectedQueuing--;
ExpectedQueueFree++;
}
else
{
ExpectedExecuting--;
ExpectedBulkheadFree++;
}
cancelExecuting = false;
}
else // Complete an executing delegate.
{
TestOutputHelper.WriteLine("Completing a task...");
Actions.First(a => a.Status == TraceableActionStatus.Executing).AllowCompletion();
ExpectedCompleted++;
if (ExpectedQueuing > 0)
{
ExpectedQueuing--;
ExpectedQueueFree++;
}
else
{
ExpectedExecuting--;
ExpectedBulkheadFree++;
}
}
try
{
Within(CohesionTimeLimit, ActualsMatchExpecteds);
}
finally
{
OutputStatus("End of next loop iteration...");
}
}
EnsureNoUnbservedTaskExceptions();
TestOutputHelper.WriteLine("Verifying all tasks completed...");
Within(CohesionTimeLimit, AllTasksCompleted);
}
}
protected abstract Task ExecuteOnBulkhead(IBulkheadPolicy bulkhead, TraceableAction action);
protected override Task ExecuteOnBulkhead(IBulkheadPolicy bulkhead, TraceableAction action)
{
return(action.ExecuteOnBulkheadAsync((AsyncBulkheadPolicy)bulkhead));
}
protected override Task ExecuteOnBulkhead(IBulkheadPolicy bulkhead, TraceableAction action)
{
return(action.ExecuteOnBulkhead <ResultPrimitive>((BulkheadPolicy <ResultPrimitive>)bulkhead));
}
public void Should_be_able_to_use_BulkheadAvailableCount_via_interface()
{
IBulkheadPolicy bulkhead = Policy.Bulkhead(20, 10);
bulkhead.BulkheadAvailableCount.Should().Be(20);
}
