private static void CheckForEmail(ErrorMessage errMsg)
{
List<DateTime> currentErrorList; // Holds current error list
DateTime cutOff = errMsg.Date.AddMinutes(-5); // Holds current cut off time
// Add a list for error type if it currently does not exist
if (!messages.ContainsKey(errMsg.FullKey))
messages.Add(errMsg.FullKey, new List<DateTime>());
// Selected the list that matches current error type
currentErrorList = messages[errMsg.FullKey];
// Remove entries that are 5 min older then current error
for (int i = currentErrorList.Count - 1; i > -1; --i)
if (currentErrorList[i] < cutOff)
currentErrorList.RemoveAt(i);
// Add current error to list.
currentErrorList.Add(errMsg.Date);
// Check to see if list meets threshold required
// if it is send email and reset list for current error type
if (currentErrorList.Count >= CommandLineSettings.Threshold)
{
currentErrorList.Clear();
SendEmail(errMsg);
}
}
private static void SendEmail(ErrorMessage errMsg)
{
// Command line argument must the the SMTP host.
SmtpClient client = new SmtpClient(Settings.Host, Settings.Port);
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential(Settings.SendFrom, Settings.Password);
// Specify the e-mail sender.
// Create a mailing address that includes a UTF8 character
// in the display name.
MailAddress from = new MailAddress(Settings.SendFrom);
// Set destinations for the e-mail message.
MailAddress to = new MailAddress(Settings.SendTo);
// Specify the message content.
MailMessage message = new MailMessage(from, to);
message.Body = errMsg.ToString();
message.Subject = errMsg.Description;
// Set the method that is called back when the send operation ends.
client.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
// Sending message
client.Send(message);
// Clean up.
message.Dispose();
}
private static void ParseEventLog()
{
try
{
// Check to see that file exists.
if (System.IO.File.Exists(CommandLineSettings.LogFile))
{
StreamReader input;
// Open log file for reading and allow access to other programs to continue to read and write to file
using (input = new StreamReader(new FileStream(CommandLineSettings.LogFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
{
while (!input.EndOfStream)
{
// Get next line
string message = input.ReadLine();
// Parse error message
ErrorMessage errMsg = new ErrorMessage(message);
// Check that message is ok
if (!errMsg.ParsingError)
{
// Add error to list of similar messages and check for threshold
CheckForEmail(errMsg);
}
else Warn("Unable to parse record - '" + message + "'");
}
}
}
else Error("Log file '" + CommandLineSettings.LogFile + "' does not exist. Program terminating.");
}
catch (Exception ex)
{
Error("Error encountered while parsing file: \r\n" + ex.ToString());
}
}