public void Run(IBackgroundTaskInstance taskInstance)
{
if (taskInstance == null)
{
Diag.DebugPrint("KATask: taskInstance was null");
return;
}
Diag.DebugPrint("KATask " + taskInstance.Task.Name + " Starting...");
// Use the ControlChannelTriggerEventDetails object to derive the context for this background task.
// The context happens to be the channelId that apps can use to differentiate between
// various instances of the channel..
var channelEventArgs = taskInstance.TriggerDetails as IControlChannelTriggerEventDetails;
ControlChannelTrigger channel = channelEventArgs.ControlChannelTrigger;
if (channel == null)
{
Diag.DebugPrint("Channel object may have been deleted.");
return;
}
string channelId = channel.ControlChannelTriggerId;
if (((IDictionary <string, object>)CoreApplication.Properties).ContainsKey(channelId))
{
try
{
var appContext = ((IDictionary <string, object>)CoreApplication.Properties)[channelId] as AppContext;
string KeepAliveMessage = "KeepAlive Message";
if (appContext != null && appContext.CommInstance != null)
{
CommModule commModule = appContext.CommInstance;
bool result;
result = commModule.SendKAMessage(KeepAliveMessage);
if (result == true)
{
// Call FlushTransport on the channel object to ensure
// the packet is out of the process and on the wire before
// exiting the keepalive task.
commModule.channel.FlushTransport();
}
else
{
// Socket has not been set up. reconnect the transport and plug in to the controlchanneltrigger object.
commModule.Reset();
// Create RTC enabled transport.
commModule.SetupTransport(commModule.serverName, commModule.serverPort);
}
}
}
catch (Exception exp)
{
Diag.DebugPrint("KA Task failed with: " + exp.Message);
}
}
else
{
Diag.DebugPrint("Cannot find AppContext key channelOne");
}
Diag.DebugPrint("KATask " + taskInstance.Task.Name + " finished.");
}