<AWT Dev> [8] Review request for 6847588: AWT test fails

Anthony Petrov anthony.petrov at oracle.com
Tue Jun 11 04:04:42 PDT 2013

In (X)KFMPeer.java we know we always operate on Window instances. The 
setCurrentFocusedWindow(Window) method will never be called with any 
other components. Therefore, to avoid the overhead of taking multiple 
locks I suggest to use the AWTAccessor.getPeer directly in this case.

In other words, I support the current version of the fix.

Also, in all other cases and for the same reason I don't agree with the 
"making the life easier" proposed by you. Note that it's not just 17 
usages. We often call getPeer directly on component instances. Perhaps 
we should replace those with calls via the AWTAccessor instead. But 
that's something to be considered under a separate CR.

best regards,

On 06/11/2013 02:53 PM, Sergey Bylokhov wrote:
> On 11.06.2013 14:01, Anthony Petrov wrote:
>> Anton: Your fix looks fine to me.
>> Sergey: I grepped our code for targetToPeer and getPeer and I see a
>> lot more usages of the latter than the former. Could you please
>> explain why using the targetToPeer is a correct way in this case? As I
>> see it, it involves taking at least two locks in the AWTAutoShutdown
>> code, and hence it seems kind of slow. Why would we prefer it over a
>> direct call to (AWTAccessor.)getPeer?
> The difference is that SunToolkit.targetToPeer() works for trayIcon,
> Menu, MenuBar, MenuItem. So to make life easier I suggest everywhere use
> targetToPeer. And probably it is good idea to remove getPeer from
> AWTAccessor(17 usage in the jdk)
>> --
>> best regards,
>> Anthony
>> On 06/10/2013 07:30 PM, Sergey Bylokhov wrote:
>>> Hi, Anton.
>>> I suppose the correct way to get peer from the component is to use
>>> (X/LWC)SunToolkit.targetToPeer() if possible.see latest version of
>>> LWKeyboardFocusManagerPeer.
>>> On 10.06.2013 17:03, Anton Litvinov wrote:
>>>> Hello,
>>>> Please review the following fix for the bug CR 6847588 which consists
>>>> in calling of an improper implementation of the method
>>>> "java.awt.Component.getPeer" in the class
>>>> "sun.awt.X11.XKeyboardFocusManagerPeer".
>>>> Webrev: http://cr.openjdk.java.net/~alitvinov/6847588/webrev.00
>>>> Thank you,
>>>> Anton

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