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From "Greg Dove (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLEX-27571) Spark Image Content Cache does not dispatch a load complete event
Date Fri, 11 Dec 2015 23:54:46 GMT

    [ https://issues.apache.org/jira/browse/FLEX-27571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15053815#comment-15053815

Greg Dove commented on FLEX-27571:

I encountered this also - but I don't think the correct fix is in ContentCache. I am also
not sure if it is always 100% reproducible. It may even appear to occur 'randomly' depending
on garbage collection timing, I certainly got it consistently around the time gc was running,
which was at a 'consistent' point in usage of my app, around the time when I was making these
requests and adding listeners to them (weak or non-weak did not make a difference here).
The workaround I use is to maintain a reference to the ContentRequest(s) until after you have
handled all the possible final (event/outcome) states from the listeners you have attached
to them, and then to remove the reference when you remove the listeners.

SDK developers/maintainers: I was also able to monkeypatch ContentRequest and remove the weak
reference setting for the first two listeners inside its private addLoaderListeners method.
This also worked for me in terms of correcting the issue described, and did not need me to
maintain the local references to the ContentRequest(s), but I wasn't sure of the potential
consequences, so I did not use the monkeypatch in our project, only using the workaround described

> Spark Image Content Cache does not dispatch a load complete event
> -----------------------------------------------------------------
>                 Key: FLEX-27571
>                 URL: https://issues.apache.org/jira/browse/FLEX-27571
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: .Unspecified - Framework
>    Affects Versions: Adobe Flex SDK 4.5.1 (Release)
>         Environment: Affected OS(s): Windows
> Affected OS(s): Windows
> Browser: Firefox 3.x
> Language Found: English
>            Reporter: Adobe JIRA
> Steps to reproduce:
> 1. Make a call to contentCache.load with a valid URL string.
> 2. Add a Event.COMPLETE listener to the returned content request from step 1.
> 3. The complete event listener is never invoked because the ContentCache loader_completeHandler
does not dispatch an event when the requested image is loaded into the cache.
>  Actual Results: No events are dispatched following a successful load completion. 
>  Expected Results: The ContentRequest instance returned from the ContentCache load()
api should dispatch a "complete" event once an image is successfully loaded.
>  Workaround (if any):
> Subclass ContentCache or create your own flavor of ContentCache and dispatch a complete
event in the loader_completeHandler()

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