public KinesisTapService()
{
this.serviceManager = new KinesisTapServiceManager();
// Try to enable pre-shutdown notifications to give KT an early start on shutdown.
// By enabling this, as soon as a shutdown is triggered in the OS, KT will be notified.
// https://docs.microsoft.com/en-us/windows/win32/services/service-control-handler-function
try
{
// Unfortunately there's no convenience property for enabling pre-shutdown notifications, so we have to do it via reflection.
// http://www.sivachandran.in/2012/03/handling-pre-shutdown-notification-in-c.html
var acceptedCommandsFieldInfo = typeof(ServiceBase).GetField("acceptedCommands", BindingFlags.Instance | BindingFlags.NonPublic);
if (acceptedCommandsFieldInfo != null)
{
int value = (int)acceptedCommandsFieldInfo.GetValue(this);
acceptedCommandsFieldInfo.SetValue(this, value | SERVICE_ACCEPT_PRESHUTDOWN);
}
}
catch (Exception ex)
{
// If this fails, we'll just log an error and ignore.
// Since we're setting internal field properties, Windows may change this at any time.
this.EventLog.WriteEntry($"An error occurred trying to configure the Service to accept pre-shutdown notifications: {ex}", EventLogEntryType.Information);
}
// Enable the ability to subscribe to shutdown events.
// This instructs the Service Control Manager to call the "OnShutdown" method when the OS is shutting down.
// When this is called, it only has 5 seconds to stop.
// This is enabled as a backup in case the pre-shutdown notification is missed.
this.CanShutdown = true;
}
public KinesisTapService()
{
this.parameterStore.StoreConventionalValues();
// configure logging
var nlogConfigPath = parameterStore.GetParameter(HostingUtility.NLogConfigPathKey);
NLog.LogManager.LoadConfiguration(nlogConfigPath);
this.serviceLoggerFactory = new LoggerFactory()
.AddEventLog(new EventLogSettings
{
SourceName = KinesisTapServiceManager.ServiceName,
LogName = "Application",
Filter = (msg, level) => level >= LogLevel.Information
})
.AddNLog();
logger = this.serviceLoggerFactory.CreateLogger <KinesisTapService>();
this.serviceManager = new KinesisTapServiceManager(this.typeLoader, this.parameterStore,
this.serviceLoggerFactory.CreateLogger <KinesisTapServiceManager>(),
new DefaultNetworkStatusProvider());
// Try to enable pre-shutdown notifications to give KT an early start on shutdown.
// By enabling this, as soon as a shutdown is triggered in the OS, KT will be notified.
// https://docs.microsoft.com/en-us/windows/win32/services/service-control-handler-function
try
{
// Unfortunately there's no convenience property for enabling pre-shutdown notifications, so we have to do it via reflection.
// http://www.sivachandran.in/2012/03/handling-pre-shutdown-notification-in-c.html
var acceptedCommandsFieldInfo = typeof(ServiceBase).GetField("acceptedCommands", BindingFlags.Instance | BindingFlags.NonPublic);
if (acceptedCommandsFieldInfo != null)
{
int value = (int)acceptedCommandsFieldInfo.GetValue(this);
acceptedCommandsFieldInfo.SetValue(this, value | SERVICE_ACCEPT_PRESHUTDOWN);
}
// when 'preshutdown' is enabled, we need to disable 'shutdown' command so that shutdown event is not handled twice
this.CanShutdown = false;
}
catch (Exception ex)
{
// If this fails, we'll just log an error and ignore.
// Since we're setting internal field properties, Windows may change this at any time.
this.EventLog.WriteEntry($"An error occurred trying to configure the Service to accept pre-shutdown notifications: {ex}", EventLogEntryType.Information);
// Set this to 'true' so we can handle OS's SHUTDOWN command
this.CanShutdown = true;
}
}
private void btnStart_Click(object sender, EventArgs e)
{
btnStart.Enabled = false;
_parameterStore.StoreConventionalValues();
var nlogConfigPath = _parameterStore.GetParameter(HostingUtility.NLogConfigPathKey);
NLog.LogManager.LoadConfiguration(nlogConfigPath);
// configure logging
_serviceManager = new KinesisTapServiceManager(new PluginLoader(), _parameterStore,
_serviceLoggerFactory.CreateLogger <KinesisTapServiceManager>(), new DefaultNetworkStatusProvider());
_serviceManager.Start();
btnStop.Enabled = true;
}
