1. Click
  2. CLK-365

Invoke listeners after all control values have been bound


    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Blocker Blocker
    • Resolution: Fixed
    • Affects Version/s: 1.5 M1
    • Fix Version/s: 1.5 M2
    • Component/s: core
    • Labels:


      When Control listeners are fired, there is no guarantee that all Control values have been bound to the incoming request. The reason for this behavior is that the #onProcess method fires the listener directly.

      The problem this creates is that the listener cannot assume a control will have its value bound. For example the following will not work:

      public MyPage extends Page {

      public void onInit()

      { Select select1 = new Select("select1"); select1.setListener(this, "onSelect1"); Select select2 = new Select("select2"); select2.setListener(this, "onSelect2"); ... }

      public boolean onSelect1()

      { // The call below will return null because select2 have // not been processed yet select2.getSelectedValues(); }

      public boolean onSelect2()

      { // The call below will return select1 selected values because // select1 have been processed select1.getSelectedValues(); }


      I have been burned by this before and think we should improve this a little.

      By delaying the listener invocation until all controls have been processed should solve this issue. In other words instead of invoking the listener from the #onProcess method, we instead register the listener to the Context, and once all Controls have been processed, we invoke all the registered listeners.


        Bob Schellink created issue -
        Bob Schellink made changes -
        Field Original Value New Value
        Priority Major [ 3 ] Blocker [ 1 ]
        Component/s core [ 10000 ]
        Bob Schellink made changes -
        Resolution Fixed [ 1 ]
        Status Open [ 1 ] Resolved [ 5 ]
        Bob Schellink made changes -
        Status Resolved [ 5 ] Closed [ 6 ]
        Henri Yandell made changes -
        Project Import Fri Mar 20 14:11:32 PDT 2009 [ 1237583492744 ]


          • Assignee:
            Bob Schellink
            Bob Schellink
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            • Created: