/// <summary>
/// subscribes to each feed
/// </summary>
private void Subscribe()
{
using (IConnection connection = this.GetConnection())
{
connection.AcknowledgementMode = AcknowledgementMode.AutoAcknowledge;
string clientId = ConfigurationManager.AppSettings["ActiveMQDurableClientId"];
if (!string.IsNullOrEmpty(clientId))
{
connection.ClientId = clientId;
}
// use a connection monitor to check for data every 3 mins
// if no data or exception occurs it will cancel the token
using (var connectionMonitor = new NMSConnectionMonitor(connection, _cancellationTokenSource, TimeSpan.FromMinutes(3)))
{
connection.Start();
// create a task to monitor for the various feeds
Task tmDataTask = Task.Factory.StartNew(() => GetTrainMovementData(connection, _cancellationTokenSource.Token, connectionMonitor), _cancellationTokenSource.Token);
Task tdDataTask = Task.Factory.StartNew(() => GetTrainDescriberData(connection, _cancellationTokenSource.Token, connectionMonitor), _cancellationTokenSource.Token);
Task vstpDataTask = Task.Factory.StartNew(() => GetVSTPData(connection, _cancellationTokenSource.Token, connectionMonitor), _cancellationTokenSource.Token);
Task rtppmTask = Task.Factory.StartNew(() => GetRtPPMData(connection, _cancellationTokenSource.Token, connectionMonitor), _cancellationTokenSource.Token);
try
{
// wait on all tasks
Task.WaitAll(new[] { tmDataTask, tdDataTask, vstpDataTask, rtppmTask }, _cancellationTokenSource.Token);
if (!connectionMonitor.QuitOk)
{
Trace.TraceError("Connection Monitor did not quit OK. Retrying Connection");
TraceHelper.FlushLog();
throw new RetryException();
}
_cancellationTokenSource.Cancel();
Trace.TraceInformation("Closing connection to: {0}", connection);
}
catch (OperationCanceledException)
{
Trace.TraceError("Connection Monitor cancelled");
TraceHelper.FlushLog();
}
}
}
}
/// <summary>
/// open a consumer to the given endpoint.
/// this method wont return until the cancellation token is cancelled
/// </summary>
/// <param name="session">session to connect to</param>
/// <param name="topic">topic to get data from</param>
/// <param name="appendedText">optional text to append to durable subscriber name</param>
/// <param name="connectionMonitor">connection monitor that is monitoring this connection</param>
/// <param name="listener">delegat to subecribe to new messages</param>
/// <param name="ct">cancellation token to wait on once connected</param>
private void OpenAndWaitConsumer(ISession session, ITopic topic, string appendedText, NMSConnectionMonitor connectionMonitor, MessageListener listener, CancellationToken ct)
{
using (IMessageConsumer consumer = CreateConsumer(session, topic, appendedText))
{
Trace.TraceInformation("Created consumer to {0}", topic);
consumer.Listener += listener;
connectionMonitor.AddMessageConsumer(consumer);
ct.WaitHandle.WaitOne();
}
}
private void GetVSTPData(IConnection connection, CancellationToken ct, NMSConnectionMonitor connectionMonitor)
{
string vstpTopic = ConfigurationManager.AppSettings["VSTPFeedName"];
if (!string.IsNullOrEmpty(vstpTopic))
{
using (ISession session = connection.CreateSession())
{
ITopic topic = session.GetTopic(vstpTopic);
OpenAndWaitConsumer(session, topic, "vstp", connectionMonitor, this.vstpConsumer_Listener, ct);
}
}
}
private void GetTrainMovementData(IConnection connection, CancellationToken ct, NMSConnectionMonitor connectionMonitor)
{
string trainMovementTopic = ConfigurationManager.AppSettings["TrainMovementName"];
if (!string.IsNullOrEmpty(trainMovementTopic))
{
using (ISession session = connection.CreateSession())
{
ITopic topic = session.GetTopic(trainMovementTopic /*"TRAIN_MVT_ALL_TOC"*/);
OpenAndWaitConsumer(session, topic, "tm", connectionMonitor, this.tmConsumer_Listener, ct);
}
}
}
private void GetTrainDescriberData(IConnection connection, CancellationToken ct, NMSConnectionMonitor connectionMonitor)
{
string trainDescriberTopic = ConfigurationManager.AppSettings["TrainDescriberName"];
if (!string.IsNullOrEmpty(trainDescriberTopic))
{
using (ISession session = connection.CreateSession())
{
ITopic topic = session.GetTopic(trainDescriberTopic/*"TD_LNW_WMC_SIG_AREA"*/);
OpenAndWaitConsumer(session, topic, "td", connectionMonitor, this.tdConsumer_Listener, ct);
}
}
}
private void GetRtPPMData(IConnection connection, CancellationToken cancellationToken, NMSConnectionMonitor connectionMonitor)
{
string rtppmTopic = ConfigurationManager.AppSettings["RTPPMFeedName"];
if (!string.IsNullOrEmpty(rtppmTopic))
{
using (ISession session = connection.CreateSession())
{
ITopic topic = session.GetTopic(rtppmTopic);
OpenAndWaitConsumer(session, topic, "rtppm", connectionMonitor, this.rtppm_Listener, cancellationToken);
}
}
}
