I am exploring the use of Component.Scheduler to execute a few, short
duration jobs within my monorail web app. I have read people's
concern about asp.net killing your threads before the job is complete.
Let's ignore that for the time being, unless using the
Component.Scheduler in a monorail web app is impossible.
I am running locally on the ASP.NET Development Server (not IIS)
running castle nightly build 1126.
I have written my Global.cs as such to start and stop the scheduler,
plus adding a very basic job.
public class Global : HttpApplication, IContainerAccessor
{
private static IWindsorContainer _container;
public IWindsorContainer Container { get { return _container; } }
protected void Application_Start(Object sender, EventArgs e)
{
_container = new IoCContainer("Web.config");
var jobSpec = new JobSpec("NoOp job.", "A test job.",
"NoOpJob", new PeriodicTrigger(new DateTime(1900, 1, 1), new
DateTime(2900, 1, 1), new TimeSpan(0, 0, 10), 1000));
_container.Resolve<IScheduler>().CreateJob(jobSpec,
CreateJobConflictAction.Ignore);
_container.Resolve<IScheduler>().Start();
}
protected void Application_End(Object sender, EventArgs e)
{
_container.Resolve<IScheduler>().Stop();
_container.Dispose();
}
}
My job is
public class NoOpJob : IJob
{
public Boolean Execute(JobExecutionContext context)
{
context.Logger.DebugFormat("Hello World - {0}",
DateTime.Now.ToShortTimeString());
return true;
}
}
After starting my web app, I am seeing jobs fail sporadically. I am
not seeing any pattern. A sample of my log is
2009-05-27 12:45:10,006 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:45:10 PM.
2009-05-27 12:45:10,006 [4] [INFO
]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob - Job
'NoOp job.' completed successfully at 5/27/2009 7:45:10 PM.
2009-05-27 12:45:20,007 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:45:20 PM.
2009-05-27 12:45:20,007 [4]
[ERROR]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob -
Job 'NoOp job.' completed with an error at 5/27/2009 7:45:20 PM.
2009-05-27 12:45:30,007 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:45:30 PM.
2009-05-27 12:45:30,007 [4] [INFO
]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob - Job
'NoOp job.' completed successfully at 5/27/2009 7:45:30 PM.
2009-05-27 12:45:40,008 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:45:40 PM.
2009-05-27 12:45:40,008 [9] [INFO
]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob - Job
'NoOp job.' completed successfully at 5/27/2009 7:45:40 PM.
2009-05-27 12:45:50,008 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:45:50 PM.
2009-05-27 12:45:50,008 [9] [INFO
]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob - Job
'NoOp job.' completed successfully at 5/27/2009 7:45:50 PM.
2009-05-27 12:46:00,009 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:46:00 PM.
2009-05-27 12:46:00,009 [4]
[ERROR]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob -
Job 'NoOp job.' completed with an error at 5/27/2009 7:46:00 PM.
2009-05-27 12:46:10,009 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:46:10 PM.
2009-05-27 12:46:10,009 [9] [INFO
]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob - Job
'NoOp job.' completed successfully at 5/27/2009 7:46:10 PM.
2009-05-27 12:46:20,010 [Job Watcher for
'JMORRIS2-MOBL1/WebDev.WebServer, Scheduler #1'.] [INFO
]Castle.Components.Scheduler.DefaultScheduler.BeginExecuteJob - Job
'NoOp job.' started at 5/27/2009 7:46:20 PM.
2009-05-27 12:46:20,010 [4] [INFO
]Castle.Components.Scheduler.DefaultScheduler.EndExecuteJob - Job
'NoOp job.' completed successfully at 5/27/2009 7:46:20 PM.
Before continuing on with this experiment (or debugging into the
castle code), I had a few questions that maybe others have already
answered.
1) Why is the (rather simple) job sporadically failing? Is there a
way to see why the job is failing?
2) Can I catch the exception and expose it to my code so I can do
something with it?
2) Is there a better way to configure the scheduler to start in a web app?
Thanks,
Jason
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