/// <summary>
/// Agent that runs a scheduled task
/// </summary>
/// <param name="task">
/// The invoked task
/// </param>
/// <remarks>
/// This method is called when a periodic or resource intensive task is invoked
/// </remarks>
protected override void OnInvoke(ScheduledTask task)
{
#if DEBUG
AgentExitReason reason = task.LastExitReason;
DebugUtility.SaveDiagnostics(new Diagnostics()
{
DeviceUniqueId = DebugUtility.GetDeviceUniqueID(), AgentExitReason = reason.ToString()
});
Debug.WriteLine("Agent Last Exited for Reason: " + reason.ToString());
DebugUtility.DebugStartStopwatch();
DebugUtility.DebugOutputMemoryUsage("Scheduled Task Initial Memory Snapshot");
#endif
source = new PhoneBirthdaySource();
source.GetEntriesCompleted += source_GetEntriesCompleted;
source.BeginGetAllEntries();
}
public void StartAgent(bool debugAgent = false)
{
// Obtain a reference to the period task, if one exists
var periodicTask = ScheduledActionService.Find(_taskName) as PeriodicTask;
// If the task already exists and background agents are enabled for the
// application, you must remove the task and then add it again to update
// the schedule
if (periodicTask != null)
{
AgentExitReason reason = periodicTask.LastExitReason;
//ISettingsService settings = KernelService.Kernel.Get<ISettingsService>();
//settings.SaveSetting<AgentExitReason>(reason, "AgentLastExitReason");
// _logger.Debug("Agent Last Exited for Reason: " + reason.ToString());
DebugUtility.SaveDiagnostics(new Diagnostics()
{
DeviceUniqueId = DebugUtility.GetDeviceUniqueID(), AgentExitReason = reason.ToString()
});
RemoveAgent();
}
periodicTask = new PeriodicTask(_taskName);
// The description is required for periodic agents. This is the string that the user
// will see in the background services Settings page on the device.
periodicTask.Description = Resources.AgentDescription;
periodicTask.ExpirationTime = DateTime.Now.AddDays(14);
// Place the call to Add in a try block in case the user has disabled agents.
try
{
ScheduledActionService.Add(periodicTask);
// If debugging is enabled, use LaunchForTest to launch the agent in one minute.
#if (DEBUG_AGENT)
ScheduledActionService.LaunchForTest(_taskName, TimeSpan.FromSeconds(60));
#endif
#if DEBUG
if (debugAgent)
{
ScheduledActionService.LaunchForTest(_taskName, TimeSpan.FromSeconds(60));
}
#endif
}
catch (InvalidOperationException exception)
{
if (exception.Message.Contains("BNS Error: The action is disabled"))
{
throw new AgentManagementException(Resources.AgentsDisabledByUserError);
}
if (exception.Message.Contains("BNS Error: The maximum number of ScheduledActions of this type have already been added."))
{
if (!AreAgentsSupported)
{
throw new AgentManagementException(Resources.AgentsNotSupportedError);
}
else
{
throw new AgentManagementException(Resources.TooManyAgentsError);
}
}
}
}
