/// <summary>
/// Executes the AMQP network detach operation.
/// </summary>
/// <param name="timeout">
/// Timeout to wait for for detach response. A timeout of 0 or less will not block to wait for a response.
/// </param>
/// <param name="cause">Error to detach link. Can be null.</param>
/// <exception cref="Amqp.AmqpException">
/// Throws when an error occur during amqp detach. Or contains Error response from detach.
/// </exception>
/// <exception cref="System.TimeoutException">
/// Throws when detach response is not received in specified timeout.
/// </exception>
protected override void DoClose(TimeSpan timeout, Error cause = null)
{
if (IsDurable)
{
Task t = this.Link.DetachAsync(cause);
if (TimeSpan.Compare(timeout, TimeSpan.Zero) > 0)
{
/*
* AmqpNetLite does not allow a timeout to be specific for link detach request even though
* it uses the same close operation which takes a parameter for timeout. AmqpNetLite uses
* it default timeout of 60000ms, see AmqpObject.DefaultTimeout, for the detach close
* operation forcing the detach request to be synchronous. To allow for asynchronous detach
* request an NMS MessageConsumer must call the DetachAsync method on a link which will block
* for up to 60000ms asynchronously to set a timeout exception or complete the task.
*/
const int amqpNetLiteDefaultTimeoutMillis = 60000; // taken from AmqpObject.DefaultTimeout
TimeSpan amqpNetLiteDefaultTimeout = TimeSpan.FromMilliseconds(amqpNetLiteDefaultTimeoutMillis);
// Create timeout which allows for the 60000ms block in the DetachAsync task.
TimeSpan actualTimeout = amqpNetLiteDefaultTimeout + timeout;
TaskUtil.Wait(t, actualTimeout);
if (t.Exception != null)
{
if (t.Exception is AggregateException)
{
throw t.Exception.InnerException;
}
else
{
throw t.Exception;
}
}
}
}
else
{
base.DoClose(timeout, cause);
}
}
internal void Connect()
{
if (this.state.CompareAndSet(ConnectionState.INITIAL, ConnectionState.CONNECTING))
{
Address addr = UriUtil.ToAddress(connInfo.remoteHost, connInfo.username, connInfo.password ?? string.Empty);
Tracer.InfoFormat("Creating Address: {0}", addr.Host);
if (this.clientIdCanSet.CompareAndSet(true, false))
{
if (this.ClientId == null)
{
connInfo.ResourceId = this.clientIdGenerator.GenerateId();
}
else
{
connInfo.ResourceId = new Id(ClientId);
}
Tracer.InfoFormat("Staring Connection with Client Id : {0}", this.ClientId);
}
Open openFrame = CreateOpenFrame(this.connInfo);
Task <Amqp.Connection> fconn = this.implCreate(addr, openFrame, this.OpenResponse);
// wait until the Open request is sent
this.impl = TaskUtil.Wait(fconn, connInfo.connectTimeout);
if (fconn.Exception != null)
{
// exceptions thrown from TaskUtil are typically System.AggregateException and are usually transport exceptions for secure transport.
// extract the innerException of interest and wrap it as an NMS exception
if (fconn.Exception is AggregateException)
{
throw ExceptionSupport.Wrap(fconn.Exception.InnerException,
"Failed to connect host {0}. Cause: {1}", openFrame.HostName, fconn.Exception.InnerException?.Message ?? fconn.Exception.Message);
}
else
{
throw ExceptionSupport.Wrap(fconn.Exception,
"Failed to connect host {0}. Cause: {1}", openFrame.HostName, fconn.Exception?.Message);
}
}
this.impl.Closed += OnInternalClosed;
this.impl.AddClosedCallback(OnInternalClosed);
this.latch = new CountDownLatch(1);
ConnectionState finishedState = ConnectionState.UNKNOWN;
// Wait for Open response
try
{
bool received = this.latch.await((this.Info.requestTimeout == 0) ? Timeout.InfiniteTimeSpan : this.RequestTimeout);
if (received && this.impl.Error == null && fconn.Exception == null)
{
Tracer.InfoFormat("Connection {0} has connected.", this.impl.ToString());
finishedState = ConnectionState.CONNECTED;
// register connection factory once client Id accepted.
MessageFactory <ConnectionInfo> .Register(this);
}
else
{
if (!received)
{
// Timeout occured waiting on response
Tracer.InfoFormat("Connection Response Timeout. Failed to receive response from {0} in {1}ms", addr.Host, this.Info.requestTimeout);
}
finishedState = ConnectionState.INITIAL;
if (fconn.Exception == null)
{
if (!received)
{
throw ExceptionSupport.GetTimeoutException(this.impl, "Connection {0} has failed to connect in {1}ms.", ClientId, connInfo.closeTimeout);
}
Tracer.ErrorFormat("Connection {0} has Failed to connect. Message: {1}", ClientId, (this.impl.Error == null ? "Unknown" : this.impl.Error.ToString()));
throw ExceptionSupport.GetException(this.impl, "Connection {0} has failed to connect.", ClientId);
}
else
{
throw ExceptionSupport.Wrap(fconn.Exception, "Connection {0} failed to connect.", ClientId);
}
}
}
finally
{
this.latch = null;
this.state.GetAndSet(finishedState);
if (finishedState != ConnectionState.CONNECTED)
{
this.impl.Close(TimeSpan.FromMilliseconds(connInfo.closeTimeout), null);
}
}
}
}
