static public void Send(string to, string vesselName, string subject, string body, string attachmentFileName)
{
EmailItem item = new EmailItem(FromEmailAddress, to, vesselName, subject, body, attachmentFileName);
lock (_lock)
{
EmailQueue.Add(item);
}
// Try sending email 3 seconds from now.
_timer.Change(3000, 3000);
}
async static private Task SendEmailMessage(EmailItem item, Action successCallback, Action <Exception> failureCallback)
{
if (null != item)
{
SmtpMail oMail = new SmtpMail("TryIt");
oMail.From = new MailAddress(item.FromEmailId);
oMail.To = new AddressCollection(item.ToEmailId);
oMail.Sender = new MailAddress(item.DisplayName);
oMail.Subject = item.Subject;
oMail.TextBody = item.Body;
oMail.ReplyTo = new MailAddress("Do not reply");
oMail.Priority = MailPriority.High;
if (item.AttachmentName.Length > 0)
{
byte[] content = null;
oMail.AddAttachment(item.AttachmentName, content);
}
SmtpServer oServer = new SmtpServer(SMTPServerName);
oServer.User = FromEmailAddress;
oServer.Password = FromEmailPassword;
oServer.ConnectType = (SmtpConnectType)SMTPEncryptionMethod;
oServer.Port = SMTPPort;
try
{
SmtpClient oSmtp = new SmtpClient();
await oSmtp.SendMailAsync(oServer, oMail);
}
catch (Exception ex)
{
Telemetry.TrackException(ex);
failureCallback(ex);
}
}
successCallback();
}
async static private void ProcessEmailQueue(object myObject)
{
if (EmailQueue.Count > 0)
{
EmailItem item = null;
// Get the next item of the list.
lock (_lock)
{
if (EmailQueue.Count > 0)
{
item = EmailQueue[0];
EmailQueue.Remove(item);
}
else
{
_timer.Change(System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite);
}
}
// Try to send the email.
await SendEmailMessage(item, () =>
{
},
(ex) =>
{
// We failed to send the email. Put it back on the end of the list and try again.
lock (_lock)
{
EmailQueue.Add(item);
}
Telemetry.TrackException(ex);
});
}
}