public static void Main(string[] args)
{
var t = new TaskQueue(maxParallelizationCount: 2, maxQueueLength: 2);
t.Queue(() => DoTask(1)); // Runs this on 1st batch.
// Works even without following `Wait()`, in that case the first
// starts immediately the second near instantly following, and third
// waits until either 1 or 2 completes.
t.Process().Wait();
Console.WriteLine("First batch should have ran to completion.");
Console.WriteLine("");
t.Queue(() => DoTask(2)); // Runs this on 2nd batch
t.Queue(() => DoTask(3)); // Runs this on 2nd batch
t.Queue(() => DoTask(4)); // Not ran, capped
t.Queue(() => DoTask(5)); // Not ran, capped
t.Queue(() => DoTask(6)); // Not ran, capped
t.Process().Wait();
Console.WriteLine($"Processed second batch. Queue and running tasks should be empty.");
Console.WriteLine($"Queue has now {t.GetQueueCount()} future tasks, and {t.GetRunningCount()} running tasks.");
Console.WriteLine("");
t.Queue(() => DoTask(7)); // Runs this on 2nd batch
t.Queue(() => DoTask(8)); // Runs this on 2nd batch
t.Queue(() => DoTask(9)); // Not ran, capped
Console.WriteLine($"Queued. Queue should have two future tasks, and nothing running yet.");
Console.WriteLine($"Queue has now {t.GetQueueCount()} future tasks, and {t.GetRunningCount()} running tasks.");
t.Process().Wait();
Console.WriteLine("Completed, press any key to quit.");
Console.ReadLine();
Console.WriteLine("The End!");
}
public async Task TestEmptyRun()
{
var t = new TaskQueue(maxParallelizationCount: 4);
await t.Process();
}
public async Task TestQueueLength()
{
var t = new TaskQueue(maxQueueLength: 2);
t.Queue(async () => { await Task.Delay(40); });
t.Queue(async () => { await Task.Delay(40); });
t.Queue(async () => { await Task.Delay(40); }); // Dropped, not ran
t.Queue(async () => { await Task.Delay(40); }); // Dropped, not ran
Assert.Equal(2, t.GetQueueCount());
await t.Process();
}
public async Task TestMaxParallelization()
{
var t = new TaskQueue(maxParallelizationCount: 4);
var n = 0;
// Sequential delays should ensure that tasks complete in order for
// `n` to grow linearly
t.Queue(async () => { await Task.Delay(40); n++; });
t.Queue(async () => { await Task.Delay(50); n++; });
t.Queue(async () => { await Task.Delay(60); n++; });
t.Queue(async () => { await Task.Delay(70); n++; });
// Following are queued and will be run as above tasks complete
// Task delay for the first must be 40 because 40 + 40 > 70
t.Queue(async () => { await Task.Delay(40); n++; });
t.Queue(async () => { await Task.Delay(50); n++; });
// Intentionally not awaited, starts tasks asynchronously
t.ProcessBackground();
// Wait for tasks to start
await Task.Delay(10);
// Tasks should now be running
Assert.Equal(4, t.GetRunningCount());
await t.Process();
// Queue and running tasks should now have ran to completion
Assert.Equal(0, t.GetRunningCount());
Assert.Equal(0, t.GetQueueCount());
Assert.Equal(6, n);
}
public async Task TestEmptyRun()
{
var t = new TaskQueue(maxParallelizationCount: 4);
await t.Process();
}