why would you cache? and which one? the url connection to an entry in a jar
file (thats the JarUrlConnection)
or (i guess) the FileUrlConnection (to the jar file itself)
both don't make much sense to cache
the first one we don't need to cache we only need to use it once by really
loading the resource
and i guess when it is finalized it is cleaned up.
We already don't use it anymore for the last modified. Because there we use
only the second one
So the fileUrlConnection to the jarFile itself thats is inside the
JarUrlConnection object.
on that one we call last modified everytime, But that will not cause the
file to open. (because it doesn't have to read the file itself)
And we can't construct JarUrlConnections (for reading the jar entries) with
the same file url connection because there is
no way to initialize the jar url connection directly with the file url
connection so they all would use the same.
johan
On 2/2/07, Eelco Hillenius <[EMAIL PROTECTED]> wrote:
Would it be possible and useful to cache the URL connection? Does it
have a time out and/ or does it use an exclusive lock?
Eelco
On 2/1/07, Johan Compagner <[EMAIL PROTECTED]> wrote:
> that is what you would think... But why generates a modification check
one
> file handle for every check in the file?
>
> because UrlConnection.connect() has again a JarUrlConnection internally
that
> makes a new connection to that jar file
> and UrlConnection does have a connect() but not a disconnect() so you
can't
> clear it.
>
> johan
>
>
>
> On 2/2/07, Eelco Hillenius < [EMAIL PROTECTED]> wrote:
> > Yeah, but that would be always one fd for a jar, no matter how many
> > files in it that have to be read, right?
> >
> > Eelco
> >
> >
> > On 2/1/07, Johan Compagner <[EMAIL PROTECTED]> wrote:
> > > yes the modification checker.
> > > But we do need to really load the resource out of the jar file once.
So
> that
> > > file handle will be used.
> > >
> > > johan
> > >
> > >
> > >
> > > On 2/1/07, Eelco Hillenius <[EMAIL PROTECTED]> wrote:
> > > >
> > > > Wasn't it optimized now so that it only hits jars once and only
hits
> > > > per resource where normal files are involved?
> > > >
> > > > Eelco
> > > >
> > > > On 2/1/07, Johan Compagner <[EMAIL PROTECTED] > wrote:
> > > > > one per resource will i think not really change.
> > > > >
> > > > >
> > > > > johan
> > > > >
> > > > >
> > > > > On 2/1/07, beboris < [EMAIL PROTECTED] > wrote:
> > > > > >
> > > > > > We will, when we are on production. Now that we are are still
in
> alpha
> > > we
> > > > > > prefer "development" (hey, we wrote our first line of wicket
code
> 5-6
> > > > > weeks
> > > > > > ago!)
> > > > > >
> > > > > > Also, even in deployment mode 'lsof' still shows us a lot of
open
> > > files
> > > > > (one
> > > > > > per resource) if we don't unpack resources from the .jar . It
may
> be
> > > > > smaller
> > > > > > number than in development mode, but still... I imagine your
> > > "workaround"
> > > > > > would close those unnecessarily open files.
> > > > > >
> > > > > > If you can't backport it, please, tell me where it is in SVN.
> We'll
> > > "hack"
> > > > > > it in oursleves for now...
> > > > > >
> > > > > > Bob
> > > > > >
> > > > > >
> > > > > > Johan Compagner wrote:
> > > > > > >
> > > > > > > can't you run in deployment mode instead of development
mode?
> > > > > > > then that shouldn't happen.
> > > > > > >
> > > > > > > I can see if we can backport it.
> > > > > > >
> > > > > > > johan
> > > > > > >
> > > > > > >
> > > > > > > On 2/1/07, beboris < [EMAIL PROTECTED]> wrote:
> > > > > > >>
> > > > > > >>
> > > > > > >> We have found a pretty weird situation with "too many open
> files"
> > > error
> > > > > > >> on
> > > > > > >> our alpha-testing site. Further analysis showed that on
each
> page
> > > > > refresh
> > > > > > >> the following resources get repeatedly obtained from the
> wicket's
> > > .jar
> > > > > > >> and
> > > > > > >> add to the number of open files:
> > > > > > >> 'wicket/ajax/wicket-ajax.js'
> > > > > > >>
> > > > >
> > >
> 'wicket/extensions/ajax/markup/html/modal/res/modal.css'
> > > > > > >>
> > > > >
> 'wicket/extensions/ajax/markup/html/modal/res/modal.js'
> > > > > > >>
> > > 'wicket/extensions/markup/html/tree/res/tree.css'
> > > > > > >>
> > > 'wicket/extensions/markup/html/tree/res/tree.js'
> > > > > > >>
> > > > > > >> Eventually (due to garbage collection?) the number of open
> files
> > > goes
> > > > > > >> down
> > > > > > >> again. But we wanted to know why those files stayed open in
the
> > > first
> > > > > > >> place
> > > > > > >> and were not closed upon retrieving a resource.
> > > > > > >>
> > > > > > >> It looks like switching to the "deployment" mode from
> "development"
> > > one
> > > > > > >> would significantly reduce the peak numbers of the open
> > > files/streams
> > > > > to
> > > > > > >> wicket .jar-s, and extracting resources from the .jar would
> reduce
> > > it
> > > > > > >> even
> > > > > > >> better. We were told that the original reason for files
staying
> > > open is
> > > > > a
> > > > > > >> Java bug (the fact that URLConnection doesnt have a
.close),
> which
> > > > > causes
> > > > > > >> those nasty results when combined with development mode
trying
> to
> > > > > monitor
> > > > > > >> [resource] files for changes and reloading them.
> > > > > > >>
> > > > > > >> We were also told that there is a workaround for that
problem
> in
> > > SVN
> > > > > > >> somewhere, but it's probably not backported to 1.2.5 . I
have 2
> > > > > questions
> > > > > > >> in
> > > > > > >> that regard:
> > > > > > >> (1) Where can we find those workarounds in the code?
> > > > > > >> (2) Is it too much work to backport them to 1.2.5 so when
it's
> > > released
> > > > > > >> it
> > > > > > >> doesn't contain the problem?
> > > > > > >>
> > > > > > >> Thanks,
> > > > > > >> Bob.
> > > > > > >> --
> > > > > > >> View this message in context:
> > > > > > >>
> > > > >
> > >
>
http://www.nabble.com/Fighting-%22Too-many-open-files%22-problem-related-to-wicket-resource-files-tf3153256.html#a8743682
> > > > > > >> Sent from the Wicket - User mailing list archive at
Nabble.com
> .
> > > > > > >>
> > > > > > >>
> > > > > > >>
> > > > >
> > >
>
-------------------------------------------------------------------------
> > > > > > >> Using Tomcat but need to do more? Need to support web
services,
> > > > > security?
> > > > > > >> Get stuff done quickly with pre-integrated technology to
make
> your
> > > job
> > > > > > >> easier.
> > > > > > >> Download IBM WebSphere Application Server v.1.0.1 based on
> Apache
> > > > > > >> Geronimo
> > > > > > >>
> > > > >
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > > > > >>
> _______________________________________________
> > > > > > >> Wicket-user mailing list
> > > > > > >> [email protected]
> > > > > > >>
> > > > >
> > >
> https://lists.sourceforge.net/lists/listinfo/wicket-user
> > > > > > >>
> > > > > > >
> > > > > > >
> > > > >
> > >
>
-------------------------------------------------------------------------
> > > > > > > Using Tomcat but need to do more? Need to support web
services,
> > > > > security?
> > > > > > > Get stuff done quickly with pre-integrated technology to
make
> your
> > > job
> > > > > > > easier.
> > > > > > > Download IBM WebSphere Application Server v.1.0.1 based on
> Apache
> > > > > Geronimo
> > > > > > >
> > > > >
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > > > > > _______________________________________________
> > > > > > > Wicket-user mailing list
> > > > > > > [email protected]
> > > > > > >
> > > > >
> > >
> https://lists.sourceforge.net/lists/listinfo/wicket-user
> > > > > > >
> > > > > > >
> > > > > >
> > > > > > --
> > > > > > View this message in context:
> > > > >
> > >
>
http://www.nabble.com/Fighting-%22Too-many-open-files%22-problem-related-to-wicket-resource-files-tf3153256.html#a8751579
> > > > > > Sent from the Wicket - User mailing list archive at Nabble.com.
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > >
>
-------------------------------------------------------------------------
> > > > > > Using Tomcat but need to do more? Need to support web
services,
> > > security?
> > > > > > Get stuff done quickly with pre-integrated technology to make
your
> job
> > > > > easier.
> > > > > > Download IBM WebSphere Application Server v.1.0.1 based on
Apache
> > > Geronimo
> > > > > >
> > > > >
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > > > > _______________________________________________
> > > > > > Wicket-user mailing list
> > > > > > [email protected]
> > > > > >
> > >
> https://lists.sourceforge.net/lists/listinfo/wicket-user
> > > > > >
> > > > >
> > > > >
> > > > >
> > >
>
-------------------------------------------------------------------------
> > > > > Using Tomcat but need to do more? Need to support web services,
> > > security?
> > > > > Get stuff done quickly with pre-integrated technology to make
your
> job
> > > > > easier.
> > > > > Download IBM WebSphere Application Server v.1.0.1 based on
Apache
> > > Geronimo
> > > > >
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > > >
> > > > > _______________________________________________
> > > > > Wicket-user mailing list
> > > > > [email protected]
> > > > >
> > >
> https://lists.sourceforge.net/lists/listinfo/wicket-user
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
>
-------------------------------------------------------------------------
> > > > Using Tomcat but need to do more? Need to support web services,
> security?
> > > > Get stuff done quickly with pre-integrated technology to make your
job
> > > easier.
> > > > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> > > >
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > > _______________________________________________
> > > > Wicket-user mailing list
> > > > [email protected]
> > > >
> https://lists.sourceforge.net/lists/listinfo/wicket-user
> > > >
> > >
> > >
> > >
>
-------------------------------------------------------------------------
> > > Using Tomcat but need to do more? Need to support web services,
> security?
> > > Get stuff done quickly with pre-integrated technology to make your
job
> > > easier.
> > > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > _______________________________________________
> > > Wicket-user mailing list
> > > [email protected]
> > >
> https://lists.sourceforge.net/lists/listinfo/wicket-user
> > >
> > >
> >
> >
>
-------------------------------------------------------------------------
> > Using Tomcat but need to do more? Need to support web services,
security?
> > Get stuff done quickly with pre-integrated technology to make your job
> easier.
> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
Geronimo
> >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > _______________________________________________
> > Wicket-user mailing list
> > [email protected]
> > https://lists.sourceforge.net/lists/listinfo/wicket-user
> >
>
>
>
-------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services,
security?
> Get stuff done quickly with pre-integrated technology to make your job
> easier.
> Download IBM WebSphere Application Server v.1.0.1 based on Apache
Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> Wicket-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/wicket-user
>
>
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job
easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Wicket-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/wicket-user
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Wicket-user mailing list
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