/// <summary>
/// Returns an AppDomainHost to run the job.
/// </summary>
/// <remarks>
/// Either an existing AppDomainHost is returned that has the
/// required assembly, or a new AppDomainHost is created.
/// </remarks>
/// <param name="job"></param>
/// <returns></returns>
private AppDomainHost GetOrCreateAppDomainHost(Job job)
{
AppDomain ad;
Components.AppDomainManager.Instance.GetAppDomainForType(job.WorkflowTypeName, true, out ad);
if (!appDomains.ContainsKey(ad.Id))
{
// New app domain, create host
var adh = new AppDomainHost(ad, contextGuid);
adh.WorkflowEvent += new EventHandler <HostEventArgs>(adh_WorkflowEvent);
appDomains.Add(ad.Id, adh);
adh.Start(Scheduler, interactive);
return(adh);
}
else
{
// Old app domain, return existing host
return(appDomains[ad.Id]);
}
}
/// <summary>
/// Returns an AppDomainHost to run the job.
/// </summary>
/// <remarks>
/// Either an existing AppDomainHost is returned that has the
/// required assembly, or a new AppDomainHost is created.
/// </remarks>
/// <param name="job"></param>
/// <returns></returns>
private AppDomainHost GetOrCreateAppDomainHost(Job job)
{
AppDomain ad;
Components.AppDomainManager.Instance.GetAppDomainForType(job.WorkflowTypeName, true, out ad);
if (!appDomains.ContainsKey(ad.Id))
{
// New app domain, create host
var adh = new AppDomainHost(ad, contextGuid);
adh.WorkflowEvent += new EventHandler<HostEventArgs>(adh_WorkflowEvent);
appDomains.Add(ad.Id, adh);
adh.Start(Scheduler, interactive);
return adh;
}
else
{
// Old app domain, return existing host
return appDomains[ad.Id];
}
}
/// <summary>
/// Starts a single job
/// </summary>
/// <param name="job"></param>
private void StartOrResumeJob(Job job)
{
AppDomainHost adh = null;
using (Context context = ContextManager.Instance.CreateContext(ConnectionMode.AutoOpen, TransactionMode.AutoCommit))
{
context.JobGuid = job.Guid;
context.ContextGuid = contextGuid;
JobInstance ji = new JobInstance(context);
ji.Guid = job.Guid;
ji.Load();
// Lock the job, so noone else can pick it up
ji.DateStarted = DateTime.Now;
ji.ObtainLock();
ji.Save();
}
// Schedule job in the appropriate app domain
adh = GetOrCreateAppDomainHost(job);
// Check if job is a new instance or previously persisted and
// has to be resumed
switch (job.Status)
{
case JobStatus.Starting:
if (interactive)
{
Console.WriteLine("Starting job: {0}", job.Guid);
}
job.WorkflowInstanceId = adh.PrepareStartJob(job);
break;
case JobStatus.Resuming:
if (interactive)
{
Console.WriteLine("Resuming job: {0}", job.Guid);
}
job.WorkflowInstanceId = adh.PrepareResumeJob(job);
break;
default:
throw new NotImplementedException();
}
// Update job status
job.TimeStarted = DateTime.Now;
job.Status = JobStatus.Executing;
job.AppDomainID = adh.ID;
// TODO: this has to happen before starting the job
lock (runningJobs)
{
runningJobs.Add(job.WorkflowInstanceId, job);
}
adh.RunJob(job);
}
