/// <summary>Timer task executed, for each url, every pollingInterval or _retryOnErrorInterval.</summary>
/// <param name="StateObj">The state object.</param>
private void TimerTask(object StateObj)
{
try
{
if (StateObj != null)
{
StateObjClass stateObj = StateObj as StateObjClass;
if (stateObj != null)
{
try
{
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(stateObj.url);
request.Credentials = System.Net.CredentialCache.DefaultCredentials;
request.Method = System.Net.WebRequestMethods.Http.Head;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode != HttpStatusCode.OK)
{
throw new WebException("Server response not valid : " + response.StatusCode);
}
}
}
catch (Exception ex)
{
if (!stateObj.errorMode)
{
eventLog.WriteEntry("Timeout with url " + stateObj.url + ". Error : " + ex.Message, EventLogEntryType.Error);
stateObj.timerReference.Change(0, _retryOnErrorInterval);
stateObj.errorMode = true;
}
}
if (stateObj.timerCanceled)
// Dispose Requested.
{
stateObj.timerReference.Dispose();
eventLog.WriteEntry("Done with url " + stateObj.url, EventLogEntryType.Information);
}
}
}
}
catch (System.Exception exception)
{
eventLog.WriteEntry("Unexpected error in PISGroundKicker.TimerTask : " + exception.ToString(), EventLogEntryType.Error);
}
}
/// <summary>
/// When implemented in a derived class, executes when a Start command is sent to the service by
/// the Service Control Manager (SCM) or when the operating system starts (for a service that
/// starts automatically). Specifies actions to take when the service starts.
/// </summary>
/// <param name="args">Data passed by the start command.</param>
protected override void OnStart(string[] args)
{
string urls = System.Configuration.ConfigurationManager.AppSettings["WebServicesUrls"];
if (!String.IsNullOrEmpty(urls))
{
foreach (string url in urls.Split(UrlsSeparator, StringSplitOptions.RemoveEmptyEntries))
{
StateObjClass stateObj = new StateObjClass();
stateObj.url = url;
stateObj.timerCanceled = false;
stateObj.errorMode = false;
System.Threading.TimerCallback TimerDelegate = new System.Threading.TimerCallback(TimerTask);
System.Threading.Timer TimerItem = new System.Threading.Timer(TimerDelegate, stateObj, 0, _pollingInterval);
stateObj.timerReference = TimerItem;
_stateObjList.Add(stateObj);
eventLog.WriteEntry("Starting thread for url " + stateObj.url, EventLogEntryType.Information);
}
}
}
