public async Task SendEmails(int timeoutMinutes = 3)
{
var context = new MailerContext();
var start = DateTime.UtcNow;
var leaseTime = TimeSpan.FromMinutes(timeoutMinutes);
var query = context.Outboxes.Query();
TableContinuationToken token = null;
do
{
var segment = query.ExecuteSegmented(token);
token = segment.ContinuationToken;
if (segment.Results.Count <= 0)
{
continue;
}
foreach (var email in segment.Results)
{
if ((DateTime.UtcNow - start) > leaseTime)
{
token = null;
break;
}
if (email.LeaseExpire.GetValueOrDefault() > start || !context.Outboxes.Lease(email, leaseTime))
{
continue;
}
await sendEmailFromStore(context, email);
}
}while (token != null);
}
public Task SendEmails(int timeoutMinutes = 3)
{
var context = new MailerContext();
var query = context.Outboxes.Query();
var leaseTime = TimeSpan.FromMinutes(timeoutMinutes);
var emails = context.Outboxes.BulkLease(query, leaseTime);
var task = emails.Select(email => sendEmailFromStore(context, email));
return(Task.WhenAll(task));
}
static async Task sendEmailFromStore(MailerContext context, EmailMessage email)
{
email.DequeueCount++;
var result = await safeSendEmail(email);
if (result == SmtpStatusCode.Ok)
{
context.Outboxes.Delete(email);
}
else if (email.DequeueCount >= 3 || !ShouldRetry(result))
{
var op = TableOperation.Insert(email);
context.DeadEmails.Execute(op);
context.Outboxes.Delete(email);
}
else
{
context.Outboxes.Replace(email);
}
}
public void AddToMailQueue(EmailMessage message)
{
var context = new MailerContext();
context.Outboxes.Insert(message);
}