Up to now, we identified two issues that lead to objects not being garbage collected:

-��GLMHintableActionButtonBrick triggers a singleton asynctask that was not cleaned after the task was ready. Now, that problem should be solved in GT.

-��RubFindReplaceService has a Singleton class variable. At the same time, RubFindReplaceService also keeps a reference to the textArea which is part of the morph tree and will prevent the whole UI that includes it to be garbage collected. We are working on dealing with this issue.

There might be other issues. We need to keep looking.

Cheers,

Doru

On Wed, Mar 25, 2015 at 8:52 AM, stepharo <stepharo@free.fr> wrote:

Hi henrik

your analyses are great.
What do you think about

GTSpotterStep>>#candidates

�� ^ candidates ifNil: [
�� candidates := GTSpotterCandidatesList new.
�� candidates announcer weak subscribe: GTSpotterCandidateAdded do: [ self candidates hasOnlyOneItem ifTrue: [ self selectFirst ] ].
�� candidates announcer weak subscribe: GTSpotterAllCandidatesAdded do: [ self selectFirst ].
�� candidates announcer weak subscribe: GTSpotterAllCandidatesRemoved do: [ self selected: nil ].
�� candidates ]

Le 24/3/15 21:38, Henrik Sperre Johansen a ��crit :

A tiny bit of code review while I'm at it...

GTSpotterResultsBrick >> initialize
�� super initialize
�� self band hSpaceFill.
�� self announcer weak subscribe: GLMBrickScrollPositionChanged send:
#onScrolled to: self

This is a tempting, but sneaky anti-pattern, you should never, ever, ever
have to subscribe to your own announcer:
The reason for calling it an anti-pattern is; if your code actually depends
on this, it means other sources might invoke changes in you indirectly
through your announcer, which quickly becomes debugging hell if you allow
it, and something screws up. (I speak from experience)

It's much easier to understand when done directly, in this case that means
extending the super method where announcement is made:

GTSpotterResultsBrick >> privateScrollPosition:anInteger
�� super privateScrollPosition:anInteger.
�� self onScrolled

Cheers,
Henry

P.S. Announcements are objects, they are intended to hold the data
subscribers might be interested in.
Whenever you find yourself writing something like:
someAnnouncer announce: SomeAnnouncement new
ask yourself twice if that may lead to subscribers accessing state that
would more naturally be part of the announcement through other channels
(such as keeping extra instvars, etc).

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