[
https://issues.apache.org/jira/browse/WICKET-4718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13437758#comment-13437758
]
Carsten Dräger edited comment on WICKET-4718 at 8/20/12 8:17 PM:
-----------------------------------------------------------------
Thank you for your comment! Unfortunately, I already tried both, and there's
two problems with it.
1) Can't do that, because that would make my resources static. I'm having many
different ResourceLinks on one page, if I would load all those resources at
once at page-load I would have a horrible performance. I also need to create
the ResourceLink at page-load because I need the URL for it (it's not supposed
to be a shared resource, my site is secured) to pass it to other functions,
e.g. a JW Player for a mp3-file coming from the database.
2) I tried to cache the stream with a class variable in #getResourceStream(),
but I also couldn't do that because the org.ektorp.AttachmentInputStream is not
serializable. I get an error if I do that, the page can't be serialized and I
don't have access to the resource even though it apparently has been queried
once.
So 1) is not an option for now. Do you maybe see a solution to point 2?
was (Author: blacklight):
Thank you for your comment! Unfortunately, I already tried both, and
there's two problems with it.
1) Can't do that, because that would make my resources static. I'm having many
different ResourceLinks on one page, if I would load all those resources at
once at page-load I would have a horrible performance. I also need to create
the ResourceLink at page-load because I need to URL for it (it's not supposed
to be a shared resource, my site is secured) to pass it to other functions,
e.g. a JW Player for a mp3-file coming from the database.
2) I tried to cache the stream with a class variable in #getResourceStream(),
but I also couldn't do that because the org.ektorp.AttachmentInputStream is not
serializable. I get an error if I do that, the page can't be serialized and I
don't have access to the resource even though it apparently has been queried
once.
So 1) is not an option for now. Do you maybe see a solution to point 2?
> ResourceStreamResource#getResourceStream() is called multiple times
> -------------------------------------------------------------------
>
> Key: WICKET-4718
> URL: https://issues.apache.org/jira/browse/WICKET-4718
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 6.0.0-beta3
> Environment: Mac OS X 10.7.4 Lion, Java 6, IntelliJ Idea 11.1, Tomcat
> 7 & Jetty 7.5.0
> Reporter: Carsten Dräger
>
> When a ResourceStreamResource is implemented to return a IResourceStream
> dynamically, by returning a new instance of an extended
> AbstractResourceStream, that ResourceStream is instantiated multiple times
> when a ResourceLink is clicked.
> In my case, that ResourceStream returns an AttachmentInputStream from the
> Ektorp library (for CouchDB interaction). This behavior results in multiple
> queries (currently up to four) when I click once on a ResourceLink to that
> resource.
> Code Examples
> Extended ResourceStreamResource: http://pastebin.com/9BB7LEiV
> Extended IResouceStream: http://pastebin.com/Z7GvzGja
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
