private static void tick(object state)
{
AppTools.ExecuteBlockWithStandardExceptionHandling(
delegate {
// We need to schedule the next tick even if there is an exception thrown in this one. Use try-finally instead of CallEveryMethod so we don't lose
// exception stack traces.
try {
foreach (var key in periodicEvictionKeys)
{
var entryWrapper = cache.Get(key) as Lazy <object>;
if (entryWrapper == null)
{
continue;
}
var entry = entryWrapper.Value as PeriodicEvictionCompositeCacheEntry;
if (entry == null)
{
continue;
}
entry.EvictOldEntries();
}
}
finally {
try {
timer.Change(tickInterval, Timeout.Infinite);
}
catch (ObjectDisposedException) {
// This should not be necessary with the Timer.Dispose overload we are using, but see http://stackoverflow.com/q/12354883/35349.
}
}
});
}
private void tick(object state)
{
AppTools.ExecuteBlockWithStandardExceptionHandling(
() => {
// We need to schedule the next tick even if there is an exception thrown in this one. Use try-finally instead of CallEveryMethod so we don't lose
// exception stack traces.
try {
var now = DateTime.Now;
if (AppTools.IsLiveInstallation && !ConfigurationStatics.MachineIsStandbyServer &&
new[] { lastHealthCheckDateAndTime, now }.Any(dt => dt.Date.IsBetweenDateTimes(lastHealthCheckDateAndTime, now)))
{
StandardLibraryMethods.SendHealthCheckEmail(WindowsServiceMethods.GetServiceInstalledName(service));
}
lastHealthCheckDateAndTime = now;
service.Tick();
}
finally {
try {
timer.Change(tickInterval, Timeout.Infinite);
}
catch (ObjectDisposedException) {
// This should not be necessary with the Timer.Dispose overload we are using, but see http://stackoverflow.com/q/12354883/35349.
}
}
});
}
/// <summary>
/// Private use only.
/// </summary>
protected override void OnStop()
{
AppTools.ExecuteBlockWithStandardExceptionHandling(
() => {
if (timer != null)
{
var waitHandle = new ManualResetEvent(false);
timer.Dispose(waitHandle);
waitHandle.WaitOne();
}
service.CleanUp();
});
}
/// <summary>
/// Private use only.
/// </summary>
protected override void OnStart(string[] args)
{
if (AppTools.SecondaryInitFailed)
{
ExitCode = 0x425; // Win32 error code; see http://msdn.microsoft.com/en-us/library/cc231199.aspx.
Stop();
return;
}
Action method = () => {
lastHealthCheckDateAndTime = DateTime.Now;
service.Init();
timer = new Timer(tick, null, tickInterval, Timeout.Infinite);
};
if (!AppTools.ExecuteBlockWithStandardExceptionHandling(method))
{
ExitCode = 0x428; // Win32 error code; see http://msdn.microsoft.com/en-us/library/cc231199.aspx.
Stop();
}
}
