d8888 888 888      88888888888 888      d8b                                 888       888          888       .d8888b.           888                               
      d88888 888 888          888     888      Y8P                                 888   o   888          888      d88P  Y88b          888                               
     d88P888 888 888          888     888                                          888  d8b  888          888      Y88b.               888                               
    d88P 888 888 888          888     88888b.  888 88888b.   .d88b.  .d8888b       888 d888b 888  .d88b.  88888b.   "Y888b.   88888b.  88888b.   .d88b.  888d888 .d88b.  
   d88P  888 888 888          888     888 "88b 888 888 "88b d88P"88b 88K           888d88888b888 d8P  Y8b 888 "88b     "Y88b. 888 "88b 888 "88b d8P  Y8b 888P"  d8P  Y8b 
  d88P   888 888 888          888     888  888 888 888  888 888  888 "Y8888b.      88888P Y88888 88888888 888  888       "888 888  888 888  888 88888888 888    88888888 
 d8888888888 888 888          888     888  888 888 888  888 Y88b 888      X88      8888P   Y8888 Y8b.     888 d88P Y88b  d88P 888 d88P 888  888 Y8b.     888    Y8b.     
d88P     888 888 888          888     888  888 888 888  888  "Y88888  88888P'      888P     Y888  "Y8888  88888P"   "Y8888P"  88888P"  888  888  "Y8888  888     "Y8888  
                                                                 888                                                          888                                        
                                                            Y8b d88P                                                          888                                        
                                                             "Y88P"                                                           888   

All Things WebSphere

Concerns and issues relating to all versions of WebSphere Application Server

Monday, March 26, 2012

 

Resiliency with the WebSphere WorkManager APIs


WebSphere Application Server provides the com.ibm.websphere.asynchbeans  and commonJ APIs (CommonJ work manager contains a subset of the asynchronous beans work manager methods)  that provide for the full support of application controlled threading, asynchronous callbacks and scoped alarms and subsystem monitors.  If you prefer standard APIs then you can use commonJ APIs instead of websphere.asynchbeans. I want to highlight a couple of settings that should be tuned when configuring both types of WorkManagers (Thread pools that administrators create for Java EE applications).

WorkManager Administrative console panel to set work timeout
WorkManager Admin Console Panel


WebSphere Application Server provides the ability to set an absolute timeout on the Work items submitted to WorkManager via the administrative web console. The Work timeout specifies the number of milliseconds to wait before a scheduled work object is released. If not specified or set to 0, the timeout is disabled. Customers should set this Work Timeout to some finite (non-zero) value so that the stuck threads get a chance to release their respective Work items. The implementor of the Work (Applications implement work objects to run code blocks asynchronously) then should take corrective action in asynchbeans.Work.release() or commonj.work.Work.release() such as exiting out of the synchronous read operations or calling Thread.currentThread().interrupt(). This works for both WorkManager and commonj APIs.  Doing this will allow your application threads to react to non responsive endpoints like remote web services or other calls where the code is waiting indefinitely synchronously on another resource.  *credit to Nathan Rauh for helping clarify this cool feature


Labels:


Comments:

Post a Comment

Subscribe to Post Comments [Atom]



Links to this post:

Create a Link



<< Home

Archives

December 2006   September 2008   January 2009   February 2009   March 2009   September 2009   October 2009   November 2009   December 2009   January 2010   February 2010   March 2010   April 2010   October 2010   January 2011   February 2011   April 2011   May 2011   June 2011   July 2011   August 2011   September 2011   October 2011   November 2011   December 2011   January 2012   February 2012   March 2012   April 2012   May 2012   June 2012   July 2012   August 2012   September 2012   October 2012   November 2012   January 2013   May 2013   June 2013   July 2013   September 2013   October 2013   June 2014   August 2014  

This page is powered by Blogger. Isn't yours?

Subscribe to Posts [Atom]