Execution order of events when pressing PrimeFaces p:commandButton

by

It failed because you used ajax="false". This fires a full synchronous request which in turn causes a full page reload, causing the oncomplete to be never fired (note that all other ajax-related attributes like process, onstart, onsuccess, onerror and update are also never fired).

That it worked when you removed actionListener is also impossible. It should have failed the same way. Perhaps you also removed ajax="false" along it without actually understanding what you were doing. Removing ajax="false" should indeed achieve the desired requirement.

Also is it possible to execute actionlistener and oncomplete simultaneously?

No. The script can only be fired before or after the action listener. You can use onclick to fire the script at the moment of the click. You can use onstart to fire the script at the moment the ajax request is about to be sent. But they will never exactly simultaneously be fired. The sequence is as follows:

  • User clicks button in client
  • onclick JavaScript code is executed
  • JavaScript prepares ajax request based on process and current HTML DOM tree
  • onstart JavaScript code is executed
  • JavaScript sends ajax request from client to server
  • JSF retrieves ajax request
  • JSF processes the request lifecycle on JSF component tree based on process
  • actionListener JSF backing bean method is executed
  • action JSF backing bean method is executed
  • JSF prepares ajax response based on update and current JSF component tree
  • JSF sends ajax response from server to client
  • JavaScript retrieves ajax response
    • if HTTP response status is 200, onsuccess JavaScript code is executed
    • else if HTTP response status is 500, onerror JavaScript code is executed
  • JavaScript performs update based on ajax response and current HTML DOM tree
  • oncomplete JavaScript code is executed

Note that the update is performed after actionListener, so if you were using onclick or onstart to show the dialog, then it may still show old content instead of updated content, which is poor for user experience. You’d then better use oncomplete instead to show the dialog. Also note that you’d better use action instead of actionListener when you intend to execute a business action.

See also:

More Related Contents:

  1. commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated
  2. Differences between action and actionListener
  3. How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throws an error / not usable
  4. h:commandButton/h:commandLink does not work on first click, works only on second click
  5. How to let validation depend on the pressed button?
  6. p:commandbutton action doesn’t work inside p:dialog
  7. How do PrimeFaces Selectors as in update=”@(.myClass)” work?
  8. PrimeFaces validator not fired
  9. How to bind dynamic content using ?
  10. PrimeFaces CSS skin not showing in login page, also JavaScript undefined errors
  11. What is the function of @this exactly?
  12. Creating FacesMessage in action method outside JSF conversion/validation mechanism?
  13. JSF + PrimeFaces: `update` attribute does not update component
  14. PrimeFaces commandButton doesn’t navigate or update
  15. How to use EL in PrimeFaces oncomplete attribute which is updated during action method
  16. How do UISelectOne and UISelectMany components preselect defaults in f:selectItems
  17. UISelectMany on a List causes java.lang.ClassCastException: java.lang.String cannot be cast to T
  18. p:commandButton vs. h:commandButton
  19. c:forEach inside primefaces(e.g. p:panelgrid) inside ui:repeat
  20. Primefaces valueChangeListener or
  21. h:commandButton not working inside h:dataTable
  22. JSF resource versioning
  23. Display dynamic image from database or remote source with p:graphicImage and StreamedContent
  24. Conversion Error setting value for ‘null Converter’ – Why do I need a Converter in JSF?
  25. java.lang.IllegalStateException:Could not find backup for factory javax.faces.application.ApplicationFactory
  26. Is there any easy way to preprocess and redirect GET requests?
  27. How to do double-click prevention in JSF
  28. Does view scope bean survive Navigation JSF
  29. How detect and remove (during a session) unused @ViewScoped beans that can’t be garbage collected
  30. Skip required validation and invoke the application

Leave a Comment