public async Task ExceedReadRate()
{
// Ensure the read rate is smaller than a block
await diskManager.UpdateSettingsAsync(new EngineSettingsBuilder { MaximumDiskReadRate = 1 }.ToSettings());
await diskManager.Tick(1000).WithTimeout();
// Queue up 6 reads, none should process.
var buffer = new byte[Piece.BlockSize];
int count = 6;
var tasks = new List <Task> ();
for (int i = 0; i < count; i++)
{
tasks.Add(diskManager.ReadAsync(fileData, new BlockInfo(0, 0, buffer.Length), buffer).AsTask());
}
Assert.AreEqual(buffer.Length * count, diskManager.PendingReadBytes, "#1");
// We should still process none.
await diskManager.Tick(1000).WithTimeout();
Assert.AreEqual(buffer.Length * count, diskManager.PendingReadBytes, "#2");
// Give a proper max read rate.
await diskManager.UpdateSettingsAsync(new EngineSettingsBuilder { MaximumDiskReadRate = Piece.BlockSize * 2 }.ToSettings());
for (int i = 0; i < 2; i++)
{
await diskManager.Tick(1000).WithTimeout();
for (int t = 0; t < 2; t++)
{
var completed = await Task.WhenAny(tasks).WithTimeout();
await completed;
tasks.Remove(completed);
}
Assert.IsFalse(tasks.Any(t => t.IsCompleted));
count -= 2;
Assert.AreEqual(buffer.Length * count, diskManager.PendingReadBytes, "#3." + i);
}
// If we add more reads after we used up our allowance they still won't process.
for (int i = 0; i < 2; i++)
{
count++;
tasks.Add(diskManager.ReadAsync(fileData, new BlockInfo(0, 0, buffer.Length), buffer).AsTask());
}
Assert.AreEqual(buffer.Length * count, diskManager.PendingReadBytes, "#4." + count);
while (count > 0)
{
await diskManager.Tick(1000).WithTimeout();
for (int t = 0; t < 2; t++)
{
var completed = await Task.WhenAny(tasks).WithTimeout();
await completed;
tasks.Remove(completed);
}
Assert.IsFalse(tasks.Any(t => t.IsCompleted));
count -= 2;
Assert.AreEqual(buffer.Length * count, diskManager.PendingReadBytes, "#5." + count);
}
}
async Task UpdateSettingsAsync(EngineSettings oldSettings, EngineSettings newSettings)
{
await DiskManager.UpdateSettingsAsync(newSettings);
if (newSettings.DiskCacheBytes != oldSettings.DiskCacheBytes)
{
await Task.WhenAll(Torrents.Select(t => DiskManager.FlushAsync(t)));
}
ConnectionManager.Settings = newSettings;
if (oldSettings.AllowPortForwarding != newSettings.AllowPortForwarding)
{
if (newSettings.AllowPortForwarding)
{
await PortForwarder.StartAsync(CancellationToken.None);
}
else
{
await PortForwarder.StopAsync(removeExistingMappings : true, CancellationToken.None);
}
}
if (oldSettings.DhtPort != newSettings.DhtPort)
{
if (DhtListener.EndPoint != null)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Udp, DhtListener.EndPoint.Port), CancellationToken.None);
}
else if (oldSettings.DhtPort > 0)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Udp, oldSettings.DhtPort), CancellationToken.None);
}
DhtListener = DhtListenerFactory.CreateUdp(newSettings.DhtPort);
if (oldSettings.DhtPort == -1)
{
await RegisterDht(DhtEngineFactory.Create(DhtListener));
}
else if (newSettings.DhtPort == -1)
{
await RegisterDht(new NullDhtEngine());
}
DhtEngine.SetListener(DhtListener);
if (IsRunning)
{
DhtListener.Start();
if (Listener is ISocketListener newDhtListener)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Udp, newDhtListener.EndPoint.Port));
}
else
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Udp, newSettings.DhtPort));
}
}
}
if (oldSettings.ListenPort != newSettings.ListenPort)
{
if (Listener is ISocketListener oldListener)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Tcp, oldListener.EndPoint.Port), CancellationToken.None);
}
else if (oldSettings.ListenPort > 0)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Tcp, oldSettings.ListenPort), CancellationToken.None);
}
Listener.Stop();
Listener = PeerListenerFactory.CreateTcp(newSettings.ListenPort);
listenManager.SetListener(Listener);
if (IsRunning)
{
Listener.Start();
// The settings could say to listen at port 0, which means 'choose one dynamically'
if (Listener is ISocketListener peerListener)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Tcp, peerListener.EndPoint.Port));
}
else
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Tcp, newSettings.ListenPort));
}
}
}
// This depends on the Listener binding to it's local port.
var localPort = newSettings.ListenPort;
if (Listener is ISocketListener newListener)
{
localPort = newListener.EndPoint.Port;
}
if ((oldSettings.AllowLocalPeerDiscovery != newSettings.AllowLocalPeerDiscovery) ||
(oldSettings.ListenPort != newSettings.ListenPort))
{
RegisterLocalPeerDiscovery(newSettings.AllowLocalPeerDiscovery && localPort > 0 ? new LocalPeerDiscovery(localPort) : null);
}
}
async Task UpdateSettingsAsync(EngineSettings oldSettings, EngineSettings newSettings)
{
await DiskManager.UpdateSettingsAsync(newSettings);
if (newSettings.DiskCacheBytes != oldSettings.DiskCacheBytes)
{
await Task.WhenAll(Torrents.Select(t => DiskManager.FlushAsync(t)));
}
ConnectionManager.Settings = newSettings;
if (oldSettings.UsePartialFiles != newSettings.UsePartialFiles)
{
foreach (var manager in Torrents)
{
await manager.UpdateUsePartialFiles(newSettings.UsePartialFiles);
}
}
if (oldSettings.AllowPortForwarding != newSettings.AllowPortForwarding)
{
if (newSettings.AllowPortForwarding)
{
await PortForwarder.StartAsync(CancellationToken.None);
}
else
{
await PortForwarder.StopAsync(removeExistingMappings : true, CancellationToken.None);
}
}
if (oldSettings.DhtEndPoint != newSettings.DhtEndPoint)
{
if (DhtListener.LocalEndPoint != null)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Udp, DhtListener.LocalEndPoint.Port), CancellationToken.None);
}
DhtListener.Stop();
if (newSettings.DhtEndPoint == null)
{
DhtListener = new NullDhtListener();
await RegisterDht(new NullDhtEngine());
}
else
{
DhtListener = Factories.CreateDhtListener(Settings.DhtEndPoint) ?? new NullDhtListener();
if (IsRunning)
{
DhtListener.Start();
}
if (oldSettings.DhtEndPoint == null)
{
var dht = Factories.CreateDht();
await dht.SetListenerAsync(DhtListener);
await RegisterDht(dht);
}
else
{
await DhtEngine.SetListenerAsync(DhtListener);
}
}
if (DhtListener.LocalEndPoint != null)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Udp, DhtListener.LocalEndPoint.Port));
}
}
if (!Equals(oldSettings.ListenEndPoint, newSettings.ListenEndPoint))
{
if (PeerListener.LocalEndPoint != null)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Tcp, PeerListener.LocalEndPoint.Port), CancellationToken.None);
}
PeerListener.Stop();
PeerListener = (newSettings.ListenEndPoint == null ? null : Factories.CreatePeerConnectionListener(newSettings.ListenEndPoint)) ?? new NullPeerListener();
listenManager.SetListener(PeerListener);
if (IsRunning)
{
PeerListener.Start();
// The settings could say to listen at port 0, which means 'choose one dynamically'
if (PeerListener.LocalEndPoint != null)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Tcp, PeerListener.LocalEndPoint.Port));
}
}
}
if (oldSettings.AllowLocalPeerDiscovery != newSettings.AllowLocalPeerDiscovery)
{
RegisterLocalPeerDiscovery(!newSettings.AllowLocalPeerDiscovery ? null : Factories.CreateLocalPeerDiscovery());
}
}
