static void Main(string[] args)
{
SmtpServersConfiguration smtpConfiguration = SmtpServersManager.LoadSmtpServers(); //load all smtp servers
List <ExpandoObject> recipients = RecipientsManager.LoadRecipients(); //load all recipients
Dictionary <string, Template> templates = TemplateManager.LoadTemplates(); //load all templates
//control if any template missing?
//checktemplates(templates,recipient)
//start mailing
var mailer = new Prague.Messaging.BatchMailer();
mailer.SendBulkMails(recipients, templates, smtpConfiguration);
}
/// <summary>
/// Send bulk emails to recipients
/// </summary>
/// <param name="recipients"></param>
/// <param name="razorTemplate"></param>
/// <param name="SMTPConfiguration"></param>
public void SendBulkMails(List <ExpandoObject> recipients, Dictionary <string, Template> templates, SmtpServersConfiguration smtpConfiguration)
{
string logName = "BATCH";
Prague.Utils.FileLogger generalLogger = new Prague.Utils.FileLogger(logName);
var dynRec = recipients.Cast <dynamic>();
List <Task <bool> > tasks = new List <Task <bool> >();
//group recipients by domain (to prevent spam as far as possible)
foreach (var rcpGrp in dynRec.GroupBy(x => x.Email.Substring(x.Email.IndexOf('@') + 1)))
{
for (int i = 0; i < smtpConfiguration.SmtpServers.Count(); i++) //cycles the available servers
{
var smtpServer = smtpConfiguration.SmtpServers[i];
int grpCount = (int)Math.Ceiling((decimal)rcpGrp.Count() / (decimal)smtpConfiguration.SmtpServers.Count); //divide the emails to send per each availavble smtp server
//temp var so they'll not be modified by other thread
var passGrpCount = grpCount;
var passCounter = i;
//start task foreach SERVER
var t = Task <bool> .Run(() =>
{
bool result = true;
generalLogger.Write(String.Format("Batch mail sending task number {0} running on SmtpServer {1} for domain {2}", Task.CurrentId.ToString(), smtpServer.Address, rcpGrp), smtpConfiguration); //locked by smtpConfiguration, ncessary for logging GENERAL, that is shared by processes.
foreach (var r in rcpGrp.Skip(passCounter *passGrpCount).Take(passGrpCount)) //elaborate only email for the selected server
{
if (Canceled)
{
break;
}
string body = "";
string subject = "";
string taskLoggerName = Task.CurrentId.ToString();
//prepare templates and send email
try
{
body = templates[r.Template].BodyParsed(r);
subject = templates[r.Template].SubjectParsed(r);
}
catch (Exception ex)
{
new FileLogger(taskLoggerName).Write(String.Format("Error sending mail to {0}. Exception: {1}", r.Email, ex.Message + " " + ex.StackTrace));
result = false;
continue;
}
Mailer mailer = new Mailer();
if (!mailer.Send(r.Email, subject, body, smtpServer, taskLoggerName))
{
result = false;
}
}
return(result);
}
);
tasks.Add(t);
//end task FOREACH SERVER
}
}
Task.WaitAll(tasks.ToArray());
foreach (var task in tasks)
{
if (!task.Result)
{
HasError = true;
break;
}
}
}
/// <summary>
/// serialize configuration file
/// </summary>
/// <param name="configurationToSave"></param>
public static void SaveSmtpServers(SmtpServersConfiguration configurationToSave)
{
//try serialize and deserialize.
Serializer.Serialize <SmtpServersConfiguration>(configurationToSave, Configuration.SmtpServerConfigurationXmlFile);
}
