/// <summary>
/// Message came in to create a new workflow.
/// </summary>
private void NewWorkflowInstance(object msg, CancellationToken ct, IMessageAcknowledge ack)
{
var wfc = (WorkflowCreate)msg;
Debug.Assert(!string.IsNullOrEmpty(wfc.TemplateName) || !string.IsNullOrEmpty(wfc.TemplateContent));
try
{
_log.InfoFormat("Hosting new workflow instance of type {0}", wfc.TemplateName);
string templateData = !string.IsNullOrEmpty(wfc.TemplateContent)
? wfc.TemplateContent
: LoadWorkflowTemplate(wfc.TemplateName);
var agent = new WorkflowAgent(this, wfc.Id, _ct, wfc.InitialData, templateData, _workflowDataRepositoryKey, _workflowMessagingKey, _workflowWorkspaceKey);
_agents.TryAdd(wfc.Id, agent);
agent.Start();
ack.MessageAcknowledged();
}
catch (Exception ex)
{
var es = string.Format("Problem while trying to host new workflow instance for type {0}: {1}",
wfc.TemplateName, ex);
_log.Error(es);
var on = Catalog.Factory.Resolve <IApplicationAlert>();
on.RaiseAlert(ApplicationAlertKind.Unknown, es);
if (_agents.ContainsKey(wfc.Id))
{
WorkflowAgent _;
_agents.TryRemove(wfc.Id, out _);
}
ack.MessageRejected();
}
}
/// <summary>
/// Job scheduler says it's time to wake a workflow.
/// </summary>
private void WakeWorkflow(object msg, CancellationToken ct, IMessageAcknowledge ack)
{
try
{
var wwfj = (WakeWorkflowJob)msg;
_log.InfoFormat("Scheduled wake of sleeping workflow {0}", wwfj.Id);
TryAcquireWorkflow(wwfj.Id);
ack.MessageAcknowledged();
}
catch (Exception)
{
ack.MessageRejected();
throw;
}
}
private void FireRetryMsg(object msg, CancellationToken ct, IMessageAcknowledge ack)
{
var wfsmr = (WorkflowStateMachineRetry)msg;
try
{
FireRetry(ct, wfsmr);
ack.MessageAcknowledged();
}
catch (Exception)
{
ack.MessageRejected();
throw;
}
}
private void FireTriggerJobMsg(object msg, CancellationToken ct, IMessageAcknowledge ack)
{
var wftj = (FireWorkflowTriggerJob)msg;
try
{
FireTriggerJob(ct, wftj);
ack.MessageAcknowledged();
}
catch (Exception)
{
ack.MessageRejected();
throw;
}
}
/// <summary>
/// Message came in saying to trigger a workflow. If we don't host it now, assume it's sleeping.
/// </summary>
private void DistributeWorkflowTriggers(object msg, CancellationToken ct, IMessageAcknowledge ack)
{
try
{
var trigger = (WorkflowTrigger)msg;
if (_agents.ContainsKey(trigger.InstanceTarget))
{
InvokeTrigger(_agents[trigger.InstanceTarget], trigger);
}
else
{
// try to get a handle on possibly sleeping workflow.
var newAgent = TryAcquireWorkflow(trigger.InstanceTarget);
if (null != newAgent)
{
_log.InfoFormat("Waking sleeping workflow {0} with trigger {1}", trigger.InstanceTarget,
trigger.TriggerName ?? "none");
InvokeTrigger(_agents[trigger.InstanceTarget], trigger);
}
else
{
_dblog.InfoFormat("Ignoring trigger on instance {0} because it is active on another host.",
trigger.InstanceTarget);
}
}
if (null != ack)
{
ack.MessageAcknowledged();
}
}
catch (Exception)
{
if (null != ack)
{
ack.MessageRejected();
}
throw;
}
}
private void Email(object msg, CancellationToken ct, IMessageAcknowledge ack)
{
var log = ClassLogger.Create(typeof(SendEmailWorker));
var command = (SendEmail)msg;
Debug.Assert(!string.IsNullOrEmpty(command.Sender));
Debug.Assert(!string.IsNullOrEmpty(command.Subject));
Debug.Assert(null != command.Content);
Debug.Assert(command.Recipients.EmptyIfNull().Any());
if (!command.Recipients.Any())
{
return;
}
if (ct.IsCancellationRequested)
{
return;
}
var cred = new NetworkCredential {
UserName = _account, Password = _password
};
var email = new SmtpClient
{
Credentials = cred, UseDefaultCredentials = true, EnableSsl = _useSSL, Port = _port, Host = _server
};
var message = new MailMessage
{
From = new MailAddress(command.Sender),
Subject = command.Subject,
Body = command.Content,
IsBodyHtml = command.HtmlFormat
};
foreach (var r in command.Recipients)
{
message.To.Add(new MailAddress(r));
}
if (!string.IsNullOrEmpty(_replyAddress))
{
message.ReplyToList.Add(_replyAddress);
}
var sent = false;
var retryCount = 0;
while (!sent)
{
if (ct.IsCancellationRequested)
{
return;
}
try
{
if (ct.IsCancellationRequested)
{
return;
}
email.Send(message);
log.InfoFormat(
"Sent email about '{0}' to {1} recipients", command.Subject, command.Recipients.Count());
sent = true;
}
catch (SmtpFailedRecipientsException)
{
sent = true;
}
catch (SmtpFailedRecipientException)
{
sent = true;
}
catch (Exception ex)
{
retryCount++;
if (retryCount > 10)
{
const string es = "Could not send email.";
log.Error(es);
log.TraceException(ex);
var on = Catalog.Factory.Resolve <IApplicationAlert>();
on.RaiseAlert(ApplicationAlertKind.Services, es, ex);
ack.MessageRejected();
break;
}
if (ct.IsCancellationRequested)
{
return;
}
ct.WaitHandle.WaitOne(3000);
}
}
if (sent)
{
ack.MessageAcknowledged();
}
}