/// <summary>
/// Initializes a new instance of the <see cref="ApacheQpidConnectionProvider"/> class.
/// </summary>
/// <param name="hostName">Name of the host.</param>
/// <param name="port">The port.</param>
public ApacheQpidConnectionProvider(string hostName, string port)
{
string broker = string.Format("{0}:{1}", hostName, port);
connection = null;
try
{
connection = new Org.Apache.Qpid.Messaging.Connection(broker, "{protocol: amqp1.0}");
connection.SetOption("sasl_mechanisms", "PLAIN");
connection.SetOption("username", "guest");
connection.SetOption("password", "guest");
connection.Open();
session = connection.CreateSession();
}
catch (Exception e)
{
Logger.Error("Could not connect to " + hostName + ":" + port);
Console.WriteLine("Exception {0}.", e);
if (null != connection)
{
connection.Close();
}
return;
}
callback = new CallbackServer(session, this);
}
/// <summary>
/// Check and ensure that the connection object is connected.
/// New connections are established for the first time.
/// Subsequent calls verify that connection is connected and is not closed or closing.
/// This function returns only if connection is successfully opened else
/// a ConnectionClosedException is thrown.
/// </summary>
internal void CheckConnected()
{
if (closed.Value || closing.Value)
{
throw new ConnectionClosedException();
}
if (connected.Value)
{
return;
}
DateTime timeoutTime = DateTime.Now + this.RequestTimeout;
int waitCount = 1;
while (!connected.Value && !closed.Value && !closing.Value)
{
if (Monitor.TryEnter(connectedLock))
{
try // strictly for Monitor unlock
{
// Create and open the Qpid connection
try
{
// TODO: embellish the brokerUri with other connection options
// Allocate a Qpid connection
if (qpidConnection == null)
{
Tracer.DebugFormat("Amqp: create qpid connection to: {0}", this.BrokerUri.ToString());
qpidConnection =
new Org.Apache.Qpid.Messaging.Connection(
brokerUri.ToString(),
ConstructConnectionOptionsString(connectionProperties));
}
// Open the connection
if (!qpidConnection.IsOpen)
{
qpidConnection.Open();
}
connected.Value = true;
}
catch (Org.Apache.Qpid.Messaging.QpidException e)
{
Tracer.DebugFormat("Amqp: create qpid connection to: {0} failed with {1}",
this.BrokerUri.ToString(), e.Message);
throw new ConnectionClosedException(e.Message);
}
}
finally
{
Monitor.Exit(connectedLock);
}
}
if (connected.Value || closed.Value || closing.Value ||
(DateTime.Now > timeoutTime && this.RequestTimeout != InfiniteTimeSpan))
{
break;
}
// Back off from being overly aggressive. Having too many threads
// aggressively trying to connect to a down broker pegs the CPU.
Thread.Sleep(5 * (waitCount++));
}
if (!connected.Value)
{
throw new ConnectionClosedException();
}
}
/// <summary>
/// Check and ensure that the connection object is connected.
/// New connections are established for the first time.
/// Subsequent calls verify that connection is connected and is not closed or closing.
/// This function returns only if connection is successfully opened else
/// a ConnectionClosedException is thrown.
/// </summary>
internal void CheckConnected()
{
if (closed.Value || closing.Value)
{
throw new ConnectionClosedException();
}
if (connected.Value)
{
return;
}
DateTime timeoutTime = DateTime.Now + this.RequestTimeout;
int waitCount = 1;
while (!connected.Value && !closed.Value && !closing.Value)
{
if (Monitor.TryEnter(connectedLock))
{
try // strictly for Monitor unlock
{
// Create and open the Qpid connection
try
{
// TODO: embellish the brokerUri with other connection options
// Allocate a Qpid connection
if (qpidConnection == null)
{
qpidConnection =
new Org.Apache.Qpid.Messaging.Connection(
brokerUri.ToString(),
ConstructConnectionOptionsString(connectionProperties));
}
// Open the connection
if (!qpidConnection.IsOpen)
{
qpidConnection.Open();
}
connected.Value = true;
}
catch (Org.Apache.Qpid.Messaging.QpidException e)
{
throw new ConnectionClosedException(e.Message);
}
}
finally
{
Monitor.Exit(connectedLock);
}
}
if (connected.Value || closed.Value || closing.Value
|| (DateTime.Now > timeoutTime && this.RequestTimeout != InfiniteTimeSpan))
{
break;
}
// Back off from being overly aggressive. Having too many threads
// aggressively trying to connect to a down broker pegs the CPU.
Thread.Sleep(5 * (waitCount++));
}
if (!connected.Value)
{
throw new ConnectionClosedException();
}
}
