public override Task ConnectAsync(EndPoint remoteAddress, EndPoint localAddress)
{
var ch = (NativeChannel)this.channel;
if (!ch.Open)
{
return(this.CreateClosedChannelExceptionTask());
}
try
{
if (ch.connectPromise != null)
{
throw new InvalidOperationException("connection attempt already made");
}
ch.connectPromise = new TaskCompletionSource(remoteAddress);
// Schedule connect timeout.
TimeSpan connectTimeout = ch.Configuration.ConnectTimeout;
if (connectTimeout > TimeSpan.Zero)
{
ch.connectCancellationTask = ch.EventLoop
.Schedule(CancelConnect, ch, remoteAddress, connectTimeout);
}
ch.DoConnect(remoteAddress, localAddress);
return(ch.connectPromise.Task);
}
catch (Exception ex)
{
this.CloseIfClosed();
return(TaskEx.FromException(this.AnnotateConnectException(ex, remoteAddress)));
}
}
public override Task ConnectAsync(EndPoint remoteAddress, EndPoint localAddress)
{
NativeChannel ch = this.Channel;
if (!ch.Open)
{
return(this.CreateClosedChannelExceptionTask());
}
ConnectRequest request = null;
try
{
if (ch.connectPromise != null)
{
throw new InvalidOperationException("connection attempt already made");
}
ch.connectPromise = new TaskCompletionSource(remoteAddress);
if (localAddress != null)
{
ch.DoBind(localAddress);
}
request = new TcpConnect(this, (IPEndPoint)remoteAddress);
return(ch.connectPromise.Task);
}
catch (Exception ex)
{
request?.Dispose();
this.CloseIfClosed();
return(TaskEx.FromException(this.AnnotateConnectException(ex, remoteAddress)));
}
}
public Task DisconnectAsync()
{
this.AssertEventLoop();
bool wasActive = this.channel.Active;
try
{
this.channel.DoDisconnect();
}
catch (Exception t)
{
this.CloseIfClosed();
return(TaskEx.FromException(t));
}
if (wasActive && !this.channel.Active)
{
this.InvokeLater(() => this.channel.pipeline.FireChannelInactive());
}
this.CloseIfClosed(); // doDisconnect() might have closed the channel
return(TaskEx.Completed);
}
/// <summary>
/// INTERNAL API
///
/// Should only be called directly by the <see cref="AppDomain.ProcessExit"/> event
/// in production.
///
/// Safe to call multiple times, but hooks will only be run once.
/// </summary>
/// <returns>Returns a <see cref="Task"/> that will be completed once the process exits.</returns>
private Task <Done> RunClrHooks()
{
if (_clrHooksStarted.CompareAndSet(false, true))
{
Task.WhenAll(_clrShutdownTasks.Select(hook =>
{
try
{
var t = hook();
return(t);
}
catch (Exception ex)
{
Log.Error(ex, "Error occurred while executing CLR shutdown hook");
return(TaskEx.FromException <Done>(ex));
}
})).ContinueWith(tr =>
{
if (tr.IsFaulted || tr.IsCanceled)
{
_hooksRunPromise.SetException(tr.Exception.Flatten());
}
else
{
_hooksRunPromise.SetResult(Done.Instance);
}
});
}
return(ClrShutdownTask);
}
public static void TaskExGenericFromExceptionIsFaulted()
{
var exception = new Exception();
var task = TaskEx.FromException <bool>(exception);
Assert.IsTrue(task.IsFaulted);
}
public Task <IByteBuffer> GetResponseAsync()
{
if (_excecption != null)
{
return(TaskEx.FromException <IByteBuffer>(_excecption));
}
return(Task.FromResult(_buffer));
}
public static void TaskExGenericFromExceptionRespectsException()
{
var exception = new Exception();
var task = TaskEx.FromException <bool>(exception);
// ReSharper disable once PossibleNullReferenceException
Assert.AreEqual(exception, task.Exception.InnerException);
}
public override Task WriteAsync(IChannelHandlerContext context, object message)
{
if (!(message is IByteBuffer))
{
return(TaskEx.FromException(new UnsupportedMessageTypeException(message, typeof(IByteBuffer))));
}
return(this.pendingUnencryptedWrites.Add(message));
}
Task SafeExecuteOutboundAsync(Func <Task> task)
{
try
{
return(this.executor.SubmitAsync(task));
}
catch (Exception cause)
{
return(TaskEx.FromException(cause));
}
}
public override Task WriteAsync(IChannelHandlerContext context, object message)
{
Contract.Requires(context != null);
IByteBuffer buffer = null;
Task result;
try
{
if (this.AcceptOutboundMessage(message))
{
buffer = this.AllocateBuffer(context);
var input = (T)message;
try
{
this.Encode(context, input, buffer);
}
finally
{
ReferenceCountUtil.Release(input);
}
if (buffer.IsReadable())
{
result = context.WriteAsync(buffer);
}
else
{
buffer.Release();
result = context.WriteAsync(Unpooled.Empty);
}
buffer = null;
}
else
{
return(context.WriteAsync(message));
}
}
catch (EncoderException e)
{
return(TaskEx.FromException(e));
}
catch (Exception ex)
{
return(TaskEx.FromException(new EncoderException(ex)));
}
finally
{
buffer?.Release();
}
return(result);
}
Task SafeProcessOutboundMessageAsync(Func <object, object, Task> task, object state, object msg)
{
try
{
return(this.executor.SubmitAsync(task, state, msg));
}
catch (Exception cause)
{
ReferenceCountUtil.Release(msg);
return(TaskEx.FromException(cause));
}
}
public Task RegisterAsync(IEventLoop eventLoop)
{
Contract.Requires(eventLoop != null);
if (this._channel.Registered)
{
return(TaskEx.FromException(new InvalidOperationException("registered to an event loop already")));
}
if (!this._channel.IsCompatible(eventLoop))
{
return
(TaskEx.FromException(
new InvalidOperationException("incompatible event loop type: " + eventLoop.GetType().Name)));
}
// It's necessary to reuse the wrapped eventloop object. Otherwise the user will end up with multiple
// objects that do not share a common state.
if (this._channel._eventLoop == null)
{
this._channel._eventLoop = new PausableChannelEventLoop(this._channel, eventLoop);
}
else
{
this._channel._eventLoop.Unwrapped = eventLoop;
}
var promise = new TaskCompletionSource();
if (eventLoop.InEventLoop)
{
this.Register0(promise);
}
else
{
try
{
eventLoop.Execute(() => this.Register0(promise));
}
catch (Exception ex)
{
Logger.Warning(
"Force-closing a channel whose registration task was not accepted by an event loop: {0}; Cause: {1}",
_channel,
ex);
CloseForcibly();
_channel._closeTask.TryComplete();
PromiseUtil.SafeSetFailure(promise, ex, Logger);
}
}
return(promise.Task);
}
public override Task ConnectAsync(EndPoint remoteAddress, EndPoint localAddress)
{
if (Local._state == State.Connected)
{
var cause = new AlreadyConnectedException();
Local.Pipeline.FireExceptionCaught(cause);
return(TaskEx.FromException(cause));
}
if (Local._connectPromise != null)
{
throw new ConnectionPendingException();
}
Local._connectPromise = new TaskCompletionSource();
if (Local._state != State.Bound)
{
// Not bound yet and no LocalAddress specified. Get one
if (localAddress == null)
{
localAddress = new LocalAddress(Local);
}
}
if (localAddress != null)
{
try
{
Local.DoBind(localAddress);
}
catch (Exception ex)
{
PromiseUtil.SafeSetFailure(Local._connectPromise, ex, Logger);
return(CloseAsync());
}
}
var boundChannel = LocalChannelRegistry.Get(remoteAddress);
if (!(boundChannel is LocalServerChannel))
{
var cause = new ChannelException("connection refused");
PromiseUtil.SafeSetFailure(Local._connectPromise, cause, Logger);
return(CloseAsync());
}
var serverChannel = boundChannel as LocalServerChannel;
Local._peer = serverChannel.Serve(Local);
return(TaskEx.Completed);
}
/// <summary>
/// Returns a <see cref="Task"/> that will be completed with the success or failure
/// of the provided value after the specified duration.
/// </summary>
/// <typeparam name="T">The return type of task.</typeparam>
/// <param name="duration">The duration to wait.</param>
/// <param name="scheduler">The scheduler instance to use.</param>
/// <param name="value">The task we're going to wrap.</param>
/// <returns>a <see cref="Task"/> that will be completed with the success or failure
/// of the provided value after the specified duration</returns>
public static Task <T> After <T>(TimeSpan duration, IScheduler scheduler, Func <Task <T> > value)
{
if (duration < TimeSpan.MaxValue && duration.Ticks < 1)
{
// no need to schedule
try
{
return(value());
}
catch (Exception ex)
{
return(TaskEx.FromException <T>(ex));
}
}
var tcs = new TaskCompletionSource <T>();
scheduler.Advanced.ScheduleOnce(duration, () =>
{
try
{
value().ContinueWith(tr =>
{
try
{
if (tr.IsCanceled || tr.IsFaulted)
{
tcs.SetException(tr.Exception.InnerException);
}
else
{
tcs.SetResult(tr.Result);
}
}
catch (AggregateException ex)
{
// in case the task faults
tcs.SetException(ex.Flatten());
}
});
}
catch (Exception ex)
{
// in case the value() function faults
tcs.SetException(ex);
}
});
return(tcs.Task);
}
protected override Task ProcessAsync(IChannelHandlerContext context, PacketWithId packet)
{
TAckState message;
if (this.TryDequeueMessage(packet, out message))
{
return(this.processAckFunc(context, message));
}
else if (this.abortOnOutOfOrderAck)
{
return(TaskEx.FromException(new ProtocolGatewayException(ErrorCode.InvalidPubAckOrder, "Client MUST send PUBACK packets in the order in which the corresponding PUBLISH packets were received")));
}
return(TaskEx.Completed);
}
public async Task SmokeTest()
{
Task t1 = TaskEx.FromException(new InvalidOperationException("the message"));
Assert.True(t1.IsFaulted);
InvalidOperationException e1 = await Assert.ThrowsAsync <InvalidOperationException>(() => t1);
Assert.Equal("the message", e1.Message);
Task <int> t2 = TaskEx.FromException <int>(new BadImageFormatException("there's a bad image"));
Assert.True(t1.IsFaulted);
BadImageFormatException e2 = await Assert.ThrowsAsync <BadImageFormatException>(() => t2);
Assert.Equal("there's a bad image", e2.Message);
}
public Task HandshakeAsync(IChannel channel, IHttpRequest req, HttpHeaders responseHeaders)
{
if (req is IFullHttpRequest request)
{
return(this.HandshakeAsync(channel, request, responseHeaders));
}
if (Logger.DebugEnabled)
{
Logger.Debug("{} WebSocket version {} server handshake", channel, this.version);
}
IChannelPipeline p = channel.Pipeline;
IChannelHandlerContext ctx = p.Context <HttpRequestDecoder>();
if (ctx == null)
{
// this means the user use a HttpServerCodec
ctx = p.Context <HttpServerCodec>();
if (ctx == null)
{
return(TaskEx.FromException(new InvalidOperationException("No HttpDecoder and no HttpServerCodec in the pipeline")));
}
}
// Add aggregator and ensure we feed the HttpRequest so it is aggregated. A limit o 8192 should be more then
// enough for the websockets handshake payload.
//
// TODO: Make handshake work without HttpObjectAggregator at all.
string aggregatorName = "httpAggregator";
p.AddAfter(ctx.Name, aggregatorName, new HttpObjectAggregator(8192));
var completion = new TaskCompletionSource();
p.AddAfter(aggregatorName, "handshaker", new Handshaker(this, channel, responseHeaders, completion));
try
{
ctx.FireChannelRead(ReferenceCountUtil.Retain(req));
}
catch (Exception cause)
{
completion.TrySetException(cause);
}
return(completion.Task);
}
public Task BindAsync(EndPoint localAddress)
{
this.AssertEventLoop();
// todo: cancellation support
if (/*!promise.setUncancellable() || */ !this.channel.Open)
{
return(this.CreateClosedChannelExceptionTask());
}
//// See: https://github.com/netty/netty/issues/576
//if (bool.TrueString.Equals(this.channel.Configuration.getOption(ChannelOption.SO_BROADCAST)) &&
// localAddress is IPEndPoint &&
// !((IPEndPoint)localAddress).Address.getAddress().isAnyLocalAddress() &&
// !Environment.OSVersion.Platform == PlatformID.Win32NT && !Environment.isRoot())
//{
// // Warn a user about the fact that a non-root user can't receive a
// // broadcast packet on *nix if the socket is bound on non-wildcard address.
// logger.Warn(
// "A non-root user can't receive a broadcast packet if the socket " +
// "is not bound to a wildcard address; binding to a non-wildcard " +
// "address (" + localAddress + ") anyway as requested.");
//}
bool wasActive = this.channel.Active;
try
{
this.channel.DoBind(localAddress);
}
catch (Exception t)
{
this.CloseIfClosed();
return(TaskEx.FromException(t));
}
if (!wasActive && this.channel.Active)
{
this.InvokeLater(() => this.channel.pipeline.FireChannelActive());
}
return(TaskEx.Completed);
}
public void CoordinatedShutdown_must_continue_after_timeout_or_failure()
{
var phases = new Dictionary <string, Phase>()
{
{ "a", EmptyPhase },
{ "b", new Phase(ImmutableHashSet <string> .Empty.Add("a"), TimeSpan.FromMilliseconds(100), true) },
{ "c", Phase("b", "a") }
};
var co = new CoordinatedShutdown(ExtSys, phases);
co.AddTask("a", "a1", () =>
{
TestActor.Tell("A");
return(TaskEx.FromException <Done>(new Exception("boom")));
});
co.AddTask("a", "a2", () =>
{
Task.Delay(TimeSpan.FromMilliseconds(100)).Wait();
TestActor.Tell("A");
return(TaskEx.Completed);
});
co.AddTask("b", "b1", () =>
{
TestActor.Tell("B");
return(new TaskCompletionSource <Done>().Task); // never completed
});
co.AddTask("c", "c1", () =>
{
TestActor.Tell("C");
return(TaskEx.Completed);
});
co.Run(CoordinatedShutdown.UnknownReason.Instance).Wait(RemainingOrDefault);
ExpectMsg("A");
ExpectMsg("A");
ExpectMsg("B");
ExpectMsg("C");
}
public Task WriteAsync(object msg)
{
this.AssertEventLoop();
ChannelOutboundBuffer outboundBuffer = this.outboundBuffer;
if (outboundBuffer == null)
{
// If the outboundBuffer is null we know the channel was closed and so
// need to fail the future right away. If it is not null the handling of the rest
// will be done input flush0()
// See https://github.com/netty/netty/issues/2362
// release message now to prevent resource-leak
ReferenceCountUtil.Release(msg);
return(TaskEx.FromException(new ClosedChannelException()));
}
int size;
try
{
msg = this.channel.FilterOutboundMessage(msg);
size = this.channel.pipeline.EstimatorHandle.Size(msg);
if (size < 0)
{
size = 0;
}
}
catch (Exception t)
{
ReferenceCountUtil.Release(msg);
return(TaskEx.FromException(t));
}
var promise = new TaskCompletionSource();
outboundBuffer.AddMessage(msg, size, promise);
return(promise.Task);
}
public Task RegisterAsync(IEventLoop eventLoop)
{
Contract.Requires(eventLoop != null);
if (this.channel.Registered)
{
return(TaskEx.FromException(new InvalidOperationException("registered to an event loop already")));
}
if (!this.channel.IsCompatible(eventLoop))
{
return(TaskEx.FromException(new InvalidOperationException("incompatible event loop type: " + eventLoop.GetType().Name)));
}
this.channel.eventLoop = eventLoop;
var promise = new TaskCompletionSource();
if (eventLoop.InEventLoop)
{
this.Register0(promise);
}
else
{
try
{
eventLoop.Execute((u, p) => ((AbstractUnsafe)u).Register0((TaskCompletionSource)p), this, promise);
}
catch (Exception ex)
{
Logger.Warn("Force-closing a channel whose registration task was not accepted by an event loop: {}", this.channel, ex);
this.CloseForcibly();
this.channel.closeFuture.Complete();
Util.SafeSetFailure(promise, ex, Logger);
}
}
return(promise.Task);
}
public override Task WriteAsync(IChannelHandlerContext context, object message)
{
if (!(message is IHttpRequest))
{
return(context.WriteAsync(message));
}
if (this.upgradeRequested)
{
return(TaskEx.FromException(new InvalidOperationException("Attempting to write HTTP request with upgrade in progress")));
}
this.upgradeRequested = true;
this.SetUpgradeRequestHeaders(context, (IHttpRequest)message);
// Continue writing the request.
Task task = context.WriteAsync(message);
// Notify that the upgrade request was issued.
context.FireUserEventTriggered(UpgradeEvent.UpgradeIssued);
// Now we wait for the next HTTP response to see if we switch protocols.
return(task);
}
/// <summary>
/// This method must NEVER be called directly, but be executed as an
/// extra task with a clean call stack instead. The reason for this
/// is that this method calls {@link ChannelPipeline#fireChannelUnregistered()}
/// directly, which might lead to an unfortunate nesting of independent inbound/outbound
/// events. See the comments input {@link #invokeLater(Runnable)} for more details.
/// </summary>
public Task DeregisterAsync()
{
//if (!promise.setUncancellable())
//{
// return;
//}
if (!this.channel.registered)
{
return(TaskEx.Completed);
}
try
{
this.channel.DoDeregister();
}
catch (Exception t)
{
Logger.Warn("Unexpected exception occurred while deregistering a channel.", t);
return(TaskEx.FromException(t));
}
finally
{
if (this.channel.registered)
{
this.channel.registered = false;
this.channel.pipeline.FireChannelUnregistered();
}
else
{
// Some transports like local and AIO does not allow the deregistration of
// an open channel. Their doDeregister() calls close(). Consequently,
// close() calls deregister() again - no need to fire channelUnregistered.
}
}
return(TaskEx.Completed);
}
public DefaultServerUnsafe(AbstractChannel channel)
: base(channel)
{
this.err = TaskEx.FromException(new NotSupportedException());
}
protected Task CreateClosedChannelExceptionTask() => TaskEx.FromException(new ClosedChannelException());
public override Task WriteAsync(IChannelHandlerContext ctx, object msg)
{
Task result;
ThreadLocalObjectList output = null;
try
{
if (this.AcceptOutboundMessage(msg))
{
output = ThreadLocalObjectList.NewInstance();
var cast = (T)msg;
try
{
this.Encode(ctx, cast, output);
}
finally
{
ReferenceCountUtil.Release(cast);
}
if (output.Count == 0)
{
output.Return();
output = null;
throw new EncoderException(this.GetType().Name + " must produce at least one message.");
}
}
else
{
return(ctx.WriteAsync(msg));
}
}
catch (EncoderException e)
{
return(TaskEx.FromException(e));
}
catch (Exception ex)
{
return(TaskEx.FromException(new EncoderException(ex))); // todo: we don't have a stack on EncoderException but it's present on inner exception.
}
finally
{
if (output != null)
{
int lastItemIndex = output.Count - 1;
if (lastItemIndex == 0)
{
result = ctx.WriteAsync(output[0]);
}
else if (lastItemIndex > 0)
{
for (int i = 0; i < lastItemIndex; i++)
{
// we don't care about output from these messages as failure while sending one of these messages will fail all messages up to the last message - which will be observed by the caller in Task result.
ctx.WriteAsync(output[i]); // todo: optimize: once IChannelHandlerContext allows, pass "not interested in task" flag
}
result = ctx.WriteAsync(output[lastItemIndex]);
}
else
{
// 0 items in output - must never get here
result = null;
}
output.Return();
}
else
{
// output was reset during exception handling - must never get here
result = null;
}
}
return(result);
}
public override Task ConnectAsync(EndPoint remoteAddress, EndPoint localAddress)
{
return(TaskEx.FromException(new NotSupportedException()));
}
static Task ComposeExceptionTask(Exception cause) => TaskEx.FromException(cause);
public sealed override Task ConnectAsync(EndPoint remoteAddress, EndPoint localAddress)
{
// todo: handle cancellation
AbstractSocketChannel ch = this.Channel;
if (!ch.Open)
{
return(this.CreateClosedChannelExceptionTask());
}
try
{
if (ch.connectPromise != null)
{
throw new InvalidOperationException("connection attempt already made");
}
bool wasActive = this.channel.Active;
if (ch.DoConnect(remoteAddress, localAddress))
{
this.FulfillConnectPromise(wasActive);
return(TaskEx.Completed);
}
else
{
ch.connectPromise = new TaskCompletionSource(remoteAddress);
// Schedule connect timeout.
TimeSpan connectTimeout = ch.Configuration.ConnectTimeout;
if (connectTimeout > TimeSpan.Zero)
{
ch.connectCancellationTask = ch.EventLoop.Schedule(
(c, a) =>
{
// todo: make static / cache delegate?..
var self = (AbstractSocketChannel)c;
// todo: call Socket.CancelConnectAsync(...)
TaskCompletionSource promise = self.connectPromise;
var cause = new ConnectTimeoutException("connection timed out: " + a.ToString());
if (promise != null && promise.TrySetException(cause))
{
self.CloseAsync();
}
},
this.channel,
remoteAddress,
connectTimeout);
}
ch.connectPromise.Task.ContinueWith(
(t, s) =>
{
var c = (AbstractSocketChannel)s;
c.connectCancellationTask?.Cancel();
c.connectPromise = null;
c.CloseAsync();
},
ch,
TaskContinuationOptions.OnlyOnCanceled | TaskContinuationOptions.ExecuteSynchronously);
return(ch.connectPromise.Task);
}
}
catch (Exception ex)
{
this.CloseIfClosed();
return(TaskEx.FromException(this.AnnotateConnectException(ex, remoteAddress)));
}
}
protected Task CreateClosedChannelExceptionTask()
{
return(TaskEx.FromException(ClosedChannelException));
}