/// <summary>
/// Notifies the event.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="action">The action.</param>
/// <returns></returns>
public static EventResponse NotifyEvent(string url, EventAction action)
{
try
{
if (log.IsDebugEnabled) log.Debug(string.Format("Sending event [{0}]", action.Notification));
EventInvocation invoker = Activator.GetObject(typeof(EventInvocation), url) as EventInvocation;
EventResponse response = invoker.Invoke(action);
if (log.IsDebugEnabled) log.Debug("Event is successfully sent");
return response;
}
catch (Exception ex)
{
log.Error(string.Format("Invocation error: {0}", ex.Message), ex);
}
EventResponse defaultResponse = new EventResponse();
defaultResponse.Status = StringEnum.GetStringValue(EventNotificationResponse.Failed);
return defaultResponse;
}
/// <summary>
/// Called when [event received].
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse OnEventReceived(EventAction action)
{
// Put the event in a queue and respond immediately
lock (eventLock)
{
// Queue the event and trigger the processing
eventQueue.Enqueue(action, EventPriority.Normal);
eventTrigger.Set();
// Send back the processing
EventResponse response = new EventResponse();
response.Status = StringEnum.GetStringValue(EventNotificationResponse.OK);
return response;
}
}
/// <summary>
/// Verifies the response.
/// </summary>
/// <param name="response">The response.</param>
/// <returns></returns>
public static bool VerifyResponse(EventResponse response)
{
return(!string.IsNullOrEmpty(response.Status) && !response.Status.Equals(StringEnum.GetStringValue(EventNotificationResponse.Failed), StringComparison.OrdinalIgnoreCase));
}
/// <summary>
/// Starts the gateway.
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse StartGateway(EventAction action)
{
string gatewayId = action.Values[EventParameter.GatewayId];
if (log.IsDebugEnabled) log.Debug(string.Format("Start gateway. ID is [{0}]", gatewayId));
EventResponse response = new EventResponse();
IGateway gateway;
if (messageGatewayService.Find(gatewayId, out gateway))
{
// Check if the status is Stopped/Failed/Restart, if yes, remove and restart
if (gateway.Status == GatewayStatus.Failed ||
gateway.Status == GatewayStatus.Stopped ||
gateway.Status == GatewayStatus.Restart)
{
messageGatewayService.Remove(gatewayId);
ConnectGateway(gatewayId);
}
}
else
{
ConnectGateway(gatewayId);
}
return response;
}
/// <summary>
/// Stops the messenger.
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse StopMessenger(EventAction action)
{
string name = action.Values[EventParameter.MessengerName];
if (log.IsDebugEnabled) log.DebugFormat("Stopping messenger. Name is [{0}]", name);
EventResponse response = new EventResponse();
DbMessenger messenger = DbMessenger.SingleOrDefault(m => m.Name.ToLower() == name.ToLower());
if (messenger != null)
{
if (pollers == null) return response;
// Check if the poller is already started
if (pollers.Exists(p => p.Name.ToLower() == messenger.Name.ToLower()))
{
BasePoller poller = pollers.Find(p => p.Name.ToLower() == messenger.Name.ToLower());
pollers.Remove(poller);
if (workerThreads != null)
{
Thread t = workerThreads.Find(w => messenger.Name.ToLower() == w.Name.ToLower());
if (t != null)
{
try
{
t.Join(ThreadWaitInterval);
}
catch (Exception ex)
{
log.Info(string.Format("Aborting thread [{0}]", t.Name), ex);
try
{
t.Abort();
}
catch (Exception) { }
}
}
}
log.InfoFormat("Messenger [{0}] is stopped", name);
}
else
{
log.InfoFormat("Unable to find messenger [{0}]", name);
}
}
return response;
}
/// <summary>
/// Starts the messenger.
/// </summary>
/// <param name="action">The action.</param>
private EventResponse StartMessenger(EventAction action)
{
string name = action.Values[EventParameter.MessengerName];
log.InfoFormat("Starting messenger. Name is [{0}]", name);
EventResponse response = new EventResponse();
DbMessenger messenger = DbMessenger.SingleOrDefault(m =>m.Name.ToLower() == name.ToLower());
if (messenger != null)
{
// Start to poll incoming message
if (workerThreads == null) workerThreads = new List<Thread>(1);
if (pollers == null) pollers = new List<BasePoller>(1);
// Check if the poller is already started
if (pollers.Exists(p => p.Name.ToLower() == messenger.Name.ToLower()))
{
log.InfoFormat("Database messenger [{0}] is already started", messenger.Name);
return response;
}
DatabasePoller poller = new DatabasePoller(messenger, this.messageGatewayService);
poller.Name = messenger.Name;
pollers.Add(poller);
Thread worker = new Thread(new ThreadStart(poller.StartTimer));
worker.IsBackground = true;
worker.Name = messenger.Name;
workerThreads.Add(worker);
worker.Start();
log.InfoFormat("Messenger [{0}] is started", name);
}
return response;
}
/// <summary>
/// Checks the messenger status.
/// </summary>
/// <param name="action">The action.</param>
private EventResponse CheckMessengerStatus(EventAction action)
{
string name = action.Values[EventParameter.MessengerName];
log.DebugFormat("Check messenger status. Name is [{0}]", name);
EventResponse response = new EventResponse();
if (pollers == null || !pollers.Exists(p=> p.Name.ToLower() == name.ToLower()))
{
response.Status = StringEnum.GetStringValue(EventNotificationResponse.Failed);
response.Results.Add(EventParameter.GatewayStatus, StringEnum.GetStringValue(GatewayStatus.Stopped));
} else
{
response.Results.Add(EventParameter.MessengerStatus, StringEnum.GetStringValue(MessengerStatus.Started));
}
return response;
}
/// <summary>
/// Processes synchronous events
/// </summary>
/// <param name="action">The action.</param>
/// <returns>Event response</returns>
private EventResponse ProcessSyncEvents(EventAction action)
{
EventNotificationType notificationType = (EventNotificationType)StringEnum.Parse(typeof(EventNotificationType), action.Notification);
if (notificationType == EventNotificationType.QueryGatewayStatus)
{
return CheckGatewayStatus(action);
}
else if (notificationType == EventNotificationType.QueryWebServerStatus)
{
return CheckWebServerStatus(action);
}
else if (notificationType == EventNotificationType.QueryMessengerStatus)
{
return CheckMessengerStatus(action);
}
EventResponse response = new EventResponse();
response.Status = StringEnum.GetStringValue(EventNotificationResponse.Failed);
return response;
}
/// <summary>
/// Called when [event received].
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse OnEventReceived(EventAction action)
{
// Put the event in a queue and respond immediately
lock (eventLock)
{
try
{
if (action.ActionType == EventAction.ASynchronous)
{
// Queue the event and trigger the processing
eventQueue.Enqueue(action, EventPriority.Normal);
eventTrigger.Set();
// Send back the processing
EventResponse response = new EventResponse();
response.Status = StringEnum.GetStringValue(EventNotificationResponse.OK);
return response;
}
else
{
return ProcessSyncEvents(action);
}
}
catch (Exception ex)
{
log.Error(string.Format("Error processing incoming event - [{0}]", action.ToString()));
log.Error(ex.Message, ex);
}
}
return new EventResponse();
}
/// <summary>
/// Checks the web server status.
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse CheckWebServerStatus(EventAction action)
{
EventResponse response = new EventResponse();
response.Status = StringEnum.GetStringValue(EventNotificationResponse.OK);
if (webServer != null)
{
response.Results.Add(EventParameter.WebServerStatus, StringEnum.GetStringValue(WebServerStatus.Started));
response.Results.Add(EventParameter.WebServerUrl, webServer.RootUrl);
}
else
{
response.Results.Add(EventParameter.WebServerStatus, StringEnum.GetStringValue(WebServerStatus.Stopped));
response.Results.Add(EventParameter.WebServerUrl, string.Empty);
}
return response;
}
/// <summary>
/// Checks the gateway status.
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse CheckGatewayStatus(EventAction action)
{
string gatewayId = action.Values[EventParameter.GatewayId];
log.Debug(string.Format("Check gateway status. ID is [{0}]", gatewayId));
EventResponse response = new EventResponse();
IGateway gateway;
if (messageGatewayService.Find(gatewayId, out gateway))
{
// Gateway found
response.Status = StringEnum.GetStringValue(EventNotificationResponse.OK);
response.Results.Add(EventParameter.GatewayStatus, StringEnum.GetStringValue(gateway.Status));
if (gateway.Status == GatewayStatus.Started)
{
IMobileGateway mobileGateway = gateway as IMobileGateway;
response.Results.Add(EventParameter.GatewayOperator, mobileGateway.NetworkOperator.OperatorInfo);
response.Results.Add(EventParameter.GatewaySignalStrength, Convert.ToString(mobileGateway.SignalQuality.SignalStrengthPercent));
}
}
else
{
response.Status = StringEnum.GetStringValue(EventNotificationResponse.Failed);
response.Results.Add(EventParameter.GatewayStatus, StringEnum.GetStringValue(GatewayStatus.Stopped));
}
return response;
}
/// <summary>
/// Stops the gateway.
/// </summary>
/// <param name="action">The action.</param>
/// <returns></returns>
private EventResponse StopGateway(EventAction action)
{
string gatewayId = action.Values[EventParameter.GatewayId];
log.Debug(string.Format("Stop gateway. ID is [{0}]", gatewayId));
EventResponse response = new EventResponse();
IGateway gateway;
if (messageGatewayService.Find(gatewayId, out gateway))
{
messageGatewayService.Remove(gatewayId);
}
return response;
}
/// <summary>
/// Verifies the response.
/// </summary>
/// <param name="response">The response.</param>
/// <returns></returns>
public static bool VerifyResponse(EventResponse response)
{
return (!string.IsNullOrEmpty(response.Status) && !response.Status.Equals(StringEnum.GetStringValue(EventNotificationResponse.Failed), StringComparison.OrdinalIgnoreCase));
}
