c# - How to make a Win Service run Long Term with Threading -

-

I have some workflows (a WorkflowApplication and WorkflowServiceHost) in a winning service that I need to keep the long running time Is hosting Since OnStart () requires that it is completed and returned to the OS, I have a main method that sets fire on the second thread in Threadpool. My onstart () looks primarily like this 

  protected override zero onstart (string [] arg) {eventLog.WriteEntry ("start service ..."); ThreadPool.QueueUserWorkItem (New WaitCallback (ServiceMainThread)); Thread.Sleep (100); EventLogCms.WriteEntry ("service start."); }

ServiceMainThread () is the method where my workflows are executed and the main functionality is implemented. When I start the service on my Windows 7 machine, it goes about 8 minutes later. At Win Server 2008, the thread never executes.

So I think I've implemented incorrectly threading and what ServiceMainThread is kinda Seki I'm open to suggestions on what can be improved or any As the direction I am new to threading in .NET. Basic threading code ServiceMainThread coded such as: 

  private void ServiceMainThread (object state) {// .. .. workflow executed hanged eventLog.WriteEntry ( "workflow." ); While (living) {thread. Sleep (1); // ... ... Check workflow states and make sure they are still executing ...} // If action is required to be stopped and if necessary, display responsibilities. EventLog.WriteEntry ("workflow paused."); }

And for the full example purposes here, my on-site () implementation is: 

  Secure Override Zero Ontop () {alive = false; This.haltEvent.WaitOne (); // haltEvent is of type ManualResetEvent}

Is there anything clear that I can change my workflow to make it longer in the execution? While the loop looks a bit laughable (not to mention I do not like to delay the thread for any time) and I believe it can be a better solution than that.

thread pool is fine to use instead of thread, but it seemed that the task is run workflow for 2minutes before removal start and stop now broken but I think I Onstop ( ) May be able to fix. When I do not block this thread is executing on workflows I do not have an empty block in ServiceMainThread (), while loop set did the same

Update:. I get this exception from the net in the event log: 

  Framework version: v4.0.30319 Description: The process was terminated due to an unused exception. Exception information: System.NullReferenceException ads: Ptm.ServiceMainThread (on System.Threading.ExecutionContext.Run on System.Threading.ExecutionContext.Run) (System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) (on System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) on System.Threading.ThreadHelper.ThreadStart ()
p> server 2008 64-bit, that can Is there anything with my problem?

First of all, for a long-running thread, create your own thread object and start it; Do not use Threadpool . Thread pool is designed for small, relatively short-term tasks.

Second, there are several ways that you can keep your thread alive. The most basic that you have tried, which is finally a sleep (or other block) with a while is loop. It is the most basic, though not necessarily the "best" there is that much more Constructive code execution and wake can allow for less iterations of check-sleep WaitHandle is the other option, like designated names that can be accessed from other applications.

If however, you can not (or do not want to) modify other processes to inform your service of special events, then what do you have, basically, True, however, I encourage to choose the appropriate sleeping time; Should you actually check every millisecond?


Comments

Post a Comment

Popular posts from this blog

c# - sqlDecimal to decimal clr stored procedure Unable to cast object of type 'System.Data.SqlTypes.SqlDecimal' to type 'System.IConvertible' -

-
I'm new to this I'm writing a clr. stored procedure that can be used to get values ​​used in a calculation Call for another stored procedure for Gives an archived methodology int (I think SqlInt32? Value of the table's value is int) which is then necessary to convert to decimal. Here I have the code: Public static integral mood (SQL MDMMYLUE, escalistering AMY type, out of SQLDCM Result) {aResult = 0; Try {SqlConnection conn = New SqlConnection ("Reference Connection = True"); SqlCommand cmd = New SqlCommand ("sp_GetType", conn); Cmd.Parameters.AddWithValue ("@ myValueType", aMyValueType); Cmd.CommandType = CommandType.StoredProcedure; Conn.Open (); Object type = CMD. Exclamation Asser (); Conn.Close (); Decimal type FORCalculation = Convert. ToDecimal (type); Decimal value = convert toDecimal (aMyValue); // ** calculation calc = new calculation (); Decimal result = calorie.docalulation (typefarculation, value); I get an exception...
Read more

Calling GetGUIThreadInfo from Outlook VBA -

-
I need to find the active window'm writing a VBA macro in MS Outlook, which is a specific process. The goal of this is to get the active window / document name even if its original application has more than one document interface. User processor with GetCurrentThreadId is active, I am using GetGUIThreadInfo to get .dll. Here is the correct code: private type RECT as as Left LongPtr top LongPtr right LongPtr down LongPtr termination of private type GUITHREADINFO cbSize as LongPtr flags LongPtr hwndActive LongPtr hwndFocus LongPtr hwndCapture LongPtr as as as as as reset as LongPtr rcCaret as LongPtr hwndCreate as LongPtr hwndMoveSize as HwndMenuOwner end of Private Equity PtrSafe function GetWindowThreadProcessId Lib "user32" (_BVV hnw LongPtr as LongPtr Nig Mr. announced as PtrSafe function GetGUIThreadInfo Lib "user32" _ (ByVal dwthreadid as LongPtr, _ lpguithreadinfo as GUITHREADINFO) LongPtr Sub MyFunction () as dim strWindowTitle string = space as s...
Read more

Obfuscating Python code? -

-
I'm looking for a way to hide my Python source code. print "Hello World!" How can I encode this example so that it is not human-readable? I have been asked to use Base 64 but I'm not sure how. itemprop = "text"> It is limited only, first level ambiguous resolution, but has built-in: byte-code in Python Is a compiler for: dragon-o-m py_compile & lt; Your program.py & gt; creates a .pyo file with a byte-code, and where the docstrings are removed, etc. You can rename .pyo with the .py extension, and python & lt; Your program.py & gt; runs as your program, but it does not have your source code. PS : If your program blur modules like this, you need to rename them with the .pyc suffix (I Not sure it will not break a day), or you can work with .pyo and run them with python -o ... .pyo ( Import should work). This will allow dragon to search your modules (otherwise, Python looks for the .py module).
Read more