Use html from url as markup
Hello,
Is it possible to use html from an url as Markup-code for a WebPage?
I thought of doing something like this:
/public class MarkupTestPage extends WebPage implements
IMarkupResourceStreamProvider {
public MarkupTestPage(){
}
public IResourceStream getMarkupResourceStream(MarkupContainer mc,
Class? type) {
return new UrlResourceStream(new
URL(http://myserver.tvh.com/test.html;));
}
}/
This works, but I want to use this as parent html, and include the html from
wicket:head and wicket:extend tags inside my MarkupTestPage.html.
My html returned from location http://myserver.tvh.com/test.html has a
wicket:child/ tag inside.
So somehow before returning the UrlResourceStream, it should be merged.
Thanks for any help! Kind regards, Marieke Vandamme
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Re: Use html from url as markup
Create a base page which includes its html from URL and a child page
which has wicket:head and wicket:extend/. And grand-child page if
needed.
On Mon, Jul 11, 2011 at 10:16 AM, Marieke Vandamme
marieke.vanda...@tvh.be wrote:
Hello,
Is it possible to use html from an url as Markup-code for a WebPage?
I thought of doing something like this:
/public class MarkupTestPage extends WebPage implements
IMarkupResourceStreamProvider {
public MarkupTestPage(){
}
public IResourceStream getMarkupResourceStream(MarkupContainer mc,
Class? type) {
return new UrlResourceStream(new
URL(http://myserver.tvh.com/test.html;));
}
}/
This works, but I want to use this as parent html, and include the html from
wicket:head and wicket:extend tags inside my MarkupTestPage.html.
My html returned from location http://myserver.tvh.com/test.html has a
wicket:child/ tag inside.
So somehow before returning the UrlResourceStream, it should be merged.
Thanks for any help! Kind regards, Marieke Vandamme
--
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Re: Use html from url as markup
I've tried, but only getting the html from the parent page. What's between wicket:extend-tags is'nt on it... -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/Use-html-from-url-as-markup-tp3658921p3659001.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Getting A Random Localized Resource (CSS Image) Instead Of Page
Hi, What does this log statement mean? Tried to retrieve a localized string for a component that has not yet been added to the page. This can sometimes lead to an invalid or no localized resource returned I see it in almost all of our pages and it's saying that i can sometimes lead to an invalid or no localized resource returned? Is this the reason why I'm suddenly getting a different image instead of the one that I'm looking for? I'm getting a css image instead of a page and this happens very randomly. Really need help on this. THanks A Lot! Horacio - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Getting A Random Localized Resource (CSS Image) Instead Of Page
This message means that you use:
public MyPanel() {
...
Component comp = new ...;
add(comp);
comp.getString(some.resource.key); //
}
The problem is that MyPanel doesn't know yet its parent (and
respectively its page). And this leads to incomplete knowledge how to
find the resource bundle with some.resource.key.
I doubt it leads to your problem.
I think you found the reason for you problem. Johan confirmed in the
other thread that replaceSession() could be the problem.
On Mon, Jul 11, 2011 at 11:26 AM, Horacio Natyural
horacio.natyu...@gmail.com wrote:
Hi,
What does this log statement mean?
Tried to retrieve a localized string for a component that has not yet
been added to the page. This can sometimes lead to an invalid or no
localized resource returned
I see it in almost all of our pages and it's saying that i can
sometimes lead to an invalid or no localized resource returned?
Is this the reason why I'm suddenly getting a different image instead
of the one that I'm looking for?
I'm getting a css image instead of a page and this happens very randomly.
Really need help on this.
THanks A Lot!
Horacio
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Re: Getting A Random Localized Resource (CSS Image) Instead Of Page
What are the implications of this error message? Thanks On Mon, Jul 11, 2011 at 5:26 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: Hi, What does this log statement mean? Tried to retrieve a localized string for a component that has not yet been added to the page. This can sometimes lead to an invalid or no localized resource returned I see it in almost all of our pages and it's saying that i can sometimes lead to an invalid or no localized resource returned? Is this the reason why I'm suddenly getting a different image instead of the one that I'm looking for? I'm getting a css image instead of a page and this happens very randomly. Really need help on this. THanks A Lot! Horacio - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: Getting A Random Localized Resource (CSS Image) Instead Of Page
From: Horacio Natyural [mailto:horacio.natyu...@gmail.com] What are the implications of this error message? Wicket will ignore any overriding (on the Page level) of the property, only the component's own (and the Application's?) properties files will be used. E.g. if FooComponent.properties has fie=Some default and FooPage.properties has myfoocomponent.fie=Another value then calling getString(fie) in the constructor will return Some default because there is no FooPage in the hierarchy yet. - Tor Iver - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Use html from url as markup
I think that the html from the page is just rendered through the UrlResourceStream, and that this one clears the non-html standard tags like wicket:child/. Then the child-page tries to put the code between this wicket:child-tags, but they are lost. Is that possible? Thanks again for any help! Kind Regards, Marieke Vandamme -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/Use-html-from-url-as-markup-tp3658921p3659156.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: WicketFilter.init() called twice with Glassfish
The first workaround we ended up using was something like:
public class SafeWicketFilter extends WicketFilter {
private boolean
initWasAlreadyCalledSoYouShouldNotDoThisYouStupidGlassfish = false;
@Override
public void init(FilterConfig filterConfig) throws ServletException
{
synchronized(this)
{
if ( !
initWasAlreadyCalledSoYouShouldNotDoThisYouStupidGlassfish) {
super.init(filterConfig);
initWasAlreadyCalledSoYouShouldNotDoThisYouStupidGlassfish = true;
}
}
}
}
The second workaround was to stop using Glassfish. :)
- Tor Iver
Re: Getting A Random Localized Resource (CSS Image) Instead Of Page
thanks for the info.. martin, someone used getRequestCycle().setRedirect(true); Thanks for all the help On Mon, Jul 11, 2011 at 6:05 PM, Wilhelmsen Tor Iver toriv...@arrive.no wrote: From: Horacio Natyural [mailto:horacio.natyu...@gmail.com] What are the implications of this error message? Wicket will ignore any overriding (on the Page level) of the property, only the component's own (and the Application's?) properties files will be used. E.g. if FooComponent.properties has fie=Some default and FooPage.properties has myfoocomponent.fie=Another value then calling getString(fie) in the constructor will return Some default because there is no FooPage in the hierarchy yet. - Tor Iver - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: Application with name 'xxxx' already exists.
Hmm... there is just one, no more. :( You have run into a known Glassfish bug where WicketFilter.init() is called twice. A solution is to add a boolean guard in a WicketFilter subclass that only calls super.init() once. - Tor Iver
Re: Application with name 'xxxx' already exists.
It is fixed with WICKET-3867. On Mon, Jul 11, 2011 at 1:46 PM, Wilhelmsen Tor Iver toriv...@arrive.no wrote: Hmm... there is just one, no more. :( You have run into a known Glassfish bug where WicketFilter.init() is called twice. A solution is to add a boolean guard in a WicketFilter subclass that only calls super.init() once. - Tor Iver -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: YSlow still complaining Add Expires headers
anyone an idea how to change cache duration of resources?
(as setDefaultCacheDuration doesn't work for me)
Martin,
I'm using 1.4.17
Your [1] is about the page itself, not about the resources
(.css, .js, images, ...).
ok. I just wasn't sure.
Regards,
Peter.
Which version of Wicket ?
Your [1] is about the page itself, not about the resources (.css, .js,
images, ...).
On Sun, Jul 10, 2011 at 6:08 PM, Peter Karich peat...@yahoo.de wrote:
Hi all,
because of the advice in
http://apache-wicket.1842946.n4.nabble.com/expires-header-td1866672.html
https://issues.apache.org/jira/browse/WICKET-1602
I used getResourceSettings().setDefaultCacheDuration(30 * 24 * 3600);
in my WebApplication. I also did some other hacking [1] to set the
Expires header.
But I still see Add Expires headers in YSlow [2] and Page Speed [3].
What is the correct way to set the Expires headers?
Regards,
Peter.
[1]
@Override
protected void configureResponse() {
super.configureResponse();
// Last-Modified: Mon, 29 Jun 1998 02:28:12 GMT
SimpleDateFormat formatter = new SimpleDateFormat(EEE, dd MMM
HH:mm:ss z);
formatter.setTimeZone(TimeZone.getTimeZone(GMT));
WebResponse response = getWebRequestCycle().getWebResponse();
int minutes = 30 * 24 * 60;
response.setHeader(Cache-Control, public, max-age= + minutes
* 60);
String str = formatter.format(new
MyDate().plusMinutes(minutes).toDate());
response.setHeader(Expires, str);
str = formatter.format(new MyDate().minusMinutes(minutes).toDate());
response.setHeader(Last-Modified, str);
// response.setHeader(Pragma, no-cache);
// response.setHeader(Keep-Alive, + minutes * 60);
}
[2]
There are 29 static components without a far-future expiration date.
[3]
http://code.google.com/intl/de-DE/speed/page-speed/docs/caching.html#LeverageBrowserCaching
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Re: OutputStreams and Panels
Julian, may you provide a small hello-world project? I would like to see how all this work. I heard never before about BIRT and have no idea is it any good. thanks On 9 July 2011 03:40, Julian Sinai jsi...@gmail.com wrote: I should add that I used BIRT 3.7 for this. Julian -- Best regards Alex - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Page De-Serialization and memory
Running the third method (the 'problematic' one) 1 times shows no
changes in the PermGen space in VisualVM graphics.
The value is stable at 7.9Mb.
MemoryMXBean shows that non-heap space increases more than heap space
but I didn't find any resource explaining what is included in this
non-heap statistics.
The proof that PermGen is quite stable can be seen with: -verbose:gc
-XX:+PrintGCDetails
It produces something like:
[Full GC (System) [PSYoungGen: 0K-0K(76480K)] [PSOldGen:
1372K-1372K(174784K)] 1372K-1372K(251264K) [PSPermGen:
6746K-6746K(16384K)], 0.0198550 secs] [Times: user=0.01 sys=0.00,
real=0.02 secs]
Comparing several such outputs shows that PermGen is stable (not
increasing, not decreasing).
Almost all of the memory allocation happens in the YoungGen and rarely
in the OldGen. This is normal because Label objects are created and
then discarded.
On Sun, Jul 10, 2011 at 11:37 AM, Martin Grigorov mgrigo...@apache.org wrote:
Hi,
About the use cases: my experience is that most of the time the uses
the in-memory pages (for each listener callback execution, for ajax
requests,...).
Previous version of a page, or previous page is needed when the user
clicks browser back button. Even in this case most of the time the
in-memory cache is hit. Only when the user goes several pages back and
this page is not in-memory then the disk store is used.
So far so good, but...! Even in-memory store contains serialized
versions of the Page, named SerializedPage. This is a struct which
contains
{
sessionId: String,
pageId: int,
data: byte[]
}
so the Page is serialized back and forth when stored in *any*
IPageStore/IDataStore.
This is the current state in Wicket 1.5.
Me and Pedro noticed that IPageStore impl (DefaultPageStore) can be
improved to work with Page instances but we decided to postpone this
optimization for 1.5.0+.
About new String(someLiteral): I don't remember lately seeing this
code neither in libraries, nor in applications. This constructor
should be used only when the developer explicitly wants this string to
not be interned and stored in the PermGen space, i.e. it will be
stored in the heap space.
Your benchmark test tests exactly this - the heap space.
I'll try the app with MemoryMXBean to see whether the non-heap changes
after deserialization.
I'm not very into Java Serialization but indeed it seems the Strings
are deserialized in the heap. But even in this case they go in the
Eden space, i.e. they are reclaimed soon after.
On Sun, Jul 10, 2011 at 2:37 AM, richard emberson
richard.ember...@gmail.com wrote:
I you run the little Java program I included, you will see that
there is an impact - de-serialized objects take more memory.
Richard
On 07/09/2011 05:23 PM, Igor Vaynberg wrote:
string literals are interned by the jvm so they should have a minimal
memory impact.
-igor
On Sat, Jul 9, 2011 at 5:10 PM, richard emberson
richard.ember...@gmail.com wrote:
Martin,
The reason I was interested was because it struck me a couple of
days ago that while each Page, tree of Components, is created
many (almost all?) of the non-end-user-generated Strings stored
as instance variables in the tree are shared
between all copies of the Page but that when such a Page is
serialized to disk and then de-serialized, each String becomes its own
copy unique to that particular Page. This means that if an
appreciable number of Pages in-memory are reanimated Pages, then
there could be a bunch of memory being used for all the String
copies.
In the attached simple Java file (yes, I still write Java when I must)
there are three different ways of creating an array of
Label objects (not Wicket Label) where each Label takes a String:
new Label(some_string)
The first is to share the same String over all instance of the Label.
new Label(the_string)
The second is to make a copy of the String when creating each
Label;
new Label(new String(the_string))
The third is to create a single Label, serialize it to an array of
bytes and then generate the Labels in the array by de-serialized
the byte array for each Label.
Needless to say, the first uses the least memory; the label string
is shared by all Labels while the second and third approach
uses more memory. Also, if during the de-serialization process, the
de-serialized String is replaced with the original instance of the
String, then the third approach uses only as much memory as the
first approach.
No rocket science here, but it does seem to imply that if a
significant number of Pages in-memory are actually reanimated Pages,
then there could be a memory saving by
making de-serialization smarter about possible shared objects.
Even it it is only, say, a 5% saving for only certain Wicket
usage patterns, it might be worth looking into.
Hence, my question to the masters of Wicket and developers whose
application might fit the use-case.
Richard
On 07/09/2011 11:03 AM, Martin
Re: Getting A Random Localized Resource (CSS Image) Instead Of Page
does it have any effect? On Mon, Jul 11, 2011 at 7:45 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: thanks for the info.. martin, someone used getRequestCycle().setRedirect(true); Thanks for all the help On Mon, Jul 11, 2011 at 6:05 PM, Wilhelmsen Tor Iver toriv...@arrive.no wrote: From: Horacio Natyural [mailto:horacio.natyu...@gmail.com] What are the implications of this error message? Wicket will ignore any overriding (on the Page level) of the property, only the component's own (and the Application's?) properties files will be used. E.g. if FooComponent.properties has fie=Some default and FooPage.properties has myfoocomponent.fie=Another value then calling getString(fie) in the constructor will return Some default because there is no FooPage in the hierarchy yet. - Tor Iver - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: YSlow still complaining Add Expires headers
See what happens in
org.apache.wicket.markup.html.WebResource.setHeaders(WebResponse).
Then check the response headers for your resources.
I guess that your resources are located next to WEB-INF folder and are
delivered directly by the web container and thus Wicket doesn't set
the headers.
If this is the case then you here are two options:
- check your web container documentation
- add a filter in web.xml that will set the headers for all requests
to /css/*.css, /js/*.js, ...
On Mon, Jul 11, 2011 at 2:29 PM, Peter Karich peat...@yahoo.de wrote:
anyone an idea how to change cache duration of resources?
(as setDefaultCacheDuration doesn't work for me)
Martin,
I'm using 1.4.17
Your [1] is about the page itself, not about the resources
(.css, .js, images, ...).
ok. I just wasn't sure.
Regards,
Peter.
Which version of Wicket ?
Your [1] is about the page itself, not about the resources (.css, .js,
images, ...).
On Sun, Jul 10, 2011 at 6:08 PM, Peter Karich peat...@yahoo.de wrote:
Hi all,
because of the advice in
http://apache-wicket.1842946.n4.nabble.com/expires-header-td1866672.html
https://issues.apache.org/jira/browse/WICKET-1602
I used getResourceSettings().setDefaultCacheDuration(30 * 24 * 3600);
in my WebApplication. I also did some other hacking [1] to set the
Expires header.
But I still see Add Expires headers in YSlow [2] and Page Speed [3].
What is the correct way to set the Expires headers?
Regards,
Peter.
[1]
@Override
protected void configureResponse() {
super.configureResponse();
// Last-Modified: Mon, 29 Jun 1998 02:28:12 GMT
SimpleDateFormat formatter = new SimpleDateFormat(EEE, dd MMM
HH:mm:ss z);
formatter.setTimeZone(TimeZone.getTimeZone(GMT));
WebResponse response = getWebRequestCycle().getWebResponse();
int minutes = 30 * 24 * 60;
response.setHeader(Cache-Control, public, max-age= + minutes
* 60);
String str = formatter.format(new
MyDate().plusMinutes(minutes).toDate());
response.setHeader(Expires, str);
str = formatter.format(new MyDate().minusMinutes(minutes).toDate());
response.setHeader(Last-Modified, str);
// response.setHeader(Pragma, no-cache);
// response.setHeader(Keep-Alive, + minutes * 60);
}
[2]
There are 29 static components without a far-future expiration date.
[3]
http://code.google.com/intl/de-DE/speed/page-speed/docs/caching.html#LeverageBrowserCaching
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Re: Skip validation on nested form's form level validators
Hi, why don't simply put the inner form out of the outer one? Anyway, you could remove inner form's validators before the outer form is submitted and add them again when submit process is over (onFormSubmitted() ) Hi all, I have two forms nested within each other (wicket 1.4.17). The inner form adds data to the model of the outer form via ajax when it's button is pressed while the outer form saves the data to the database when the outer form's submit button is pressed. Both forms have validators attacehd to them and their components. and of course the inner form's validators must not be executed when the outer form is submitted. Having the inner form implement IFormVisitorParticipant and then check if the submitting button was it's own avoids the inner form's component's validators to be executed. But validators applied to the inner form directly (e.g. EqualInputValidators etc.) are still executed and in my case causing the request to die horribly because the requred data just is not there. I was looking for an elegant way to solve this but since all validate methods in the hierarchy are final I cannot hook any code into the form's on validation cycle. The method onValidate is not called (I guess that is because the form is validated as the outer form's child). All other methods that allow me to achieve the deisred behavior (like isEnabled) are too general cause side effects like disabling the form. At the moment the only way I can think of is to disable default form processing and then call the validators manually which is not very appealing to me. Is there another way how this can be done? Cheers, Chris - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Basic question on Developing FormComponentPanels
The recommended way for developing a FormComponentPanel is to override onBeforeRender and convertInput. My question is my not override updateModel() to synchronize the model of the custom FormComponentPanel with the models of the nested components instead of overriding convertInput? Wouldn't that be more symmetrical with onBeforeRender? model - nestedModels (onBeforeRender) nestedModel - model (onUpdate). Thanks! - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Getting A Random Localized Resource (CSS Image) Instead Of Page
btw, before the error occurrs, there would be instances in which the server would not reply here's an example scenario. a. Was able to login ppoerly b. Updated a client info (changed the alternate email address) c. Clicked the Transfer link, inputted the necessary information and clicked the Submit button, nothing d. Clicked again the submit button, nothing happend again. 5. Clicked the Refresh button The CSS image then appears there awere also instances in which the link was clicked, did not reply. then after clicking again, the css image appeared again. any ideas? On Mon, Jul 11, 2011 at 8:41 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: does it have any effect? On Mon, Jul 11, 2011 at 7:45 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: thanks for the info.. martin, someone used getRequestCycle().setRedirect(true); Thanks for all the help On Mon, Jul 11, 2011 at 6:05 PM, Wilhelmsen Tor Iver toriv...@arrive.no wrote: From: Horacio Natyural [mailto:horacio.natyu...@gmail.com] What are the implications of this error message? Wicket will ignore any overriding (on the Page level) of the property, only the component's own (and the Application's?) properties files will be used. E.g. if FooComponent.properties has fie=Some default and FooPage.properties has myfoocomponent.fie=Another value then calling getString(fie) in the constructor will return Some default because there is no FooPage in the hierarchy yet. - Tor Iver - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Xforms Controls within Wicket Application
Hello, First of all, there is ambiguity in your question. I'm not sure how the above would tie into a wicket-specific question, unless you want to create an XForm--XHTML renderer/processor using Wicket as the underlying technology (which is not a good idea IMHO). In any case: 1) Are you asking whether Wicket can be used to render XForms files (as in the the XForms specification at http://www.w3.org/TR/xforms11/). In this case, the answer is NO, I'm not aware of such an XForm renderer. You could create a custom Wicket component that is given an XForm definition document and uses it to render an XHTML page, but that is a lot of work (and probably not a very efficient way to do it, as you would ideally use XSLT or something along those lines to do XML--XML transformation. There are available open-source tools like Orbeon (see http://www.orbeon.com/) which can give you this kind of functionality (including processing of the XForm submission). Now, regarding the online/offline issue: 2) Do you have a rich client application that can render the XForms (e.g. using Swing) and allow the user to save such forms locally? In that case, you would need to write code that submits the forms when the rich client has network access. The submission should probably go to some servlet (e.g. an Orbeon-managed URL). Again, I don't think this would be wicket-related. 3) If you have a web-based application for this (e.g. a bundled Tomcat running on the user machine, which they access via the browser) then the principle is a combination of (1) and (2): You would need: a) to render the forms using something like Orbeon to present HTML to the browser b) to store the form submission to the local FS (or a locally running DB which could be something like Derby) c) to implement an uploader where the user can send locally saved forms to a central server (same as what I talked about in (2) above) On 11/7/2011 4:09 μμ, sramay wrote: Hi, Rendering a document in the Xforms or storing it in a database is as you have suggested ok. The issue is there when you have xform controls inside a wicket application instead of HTML document(form) and take the imput and stores them into a database. Am I explaining my position clearly ? Regards -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/Xforms-Controls-within-Wicket-Application-tp3619253p3659485.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Page De-Serialization and memory
When you say 1 times, you set NOS_TIMES to 1?
(NOS_TIMES should have been called ARRAY_SIZE).
Richard
On 07/11/2011 05:38 AM, Martin Grigorov wrote:
Running the third method (the 'problematic' one) 1 times shows no
changes in the PermGen space in VisualVM graphics.
The value is stable at 7.9Mb.
MemoryMXBean shows that non-heap space increases more than heap space
but I didn't find any resource explaining what is included in this
non-heap statistics.
The proof that PermGen is quite stable can be seen with: -verbose:gc
-XX:+PrintGCDetails
It produces something like:
[Full GC (System) [PSYoungGen: 0K-0K(76480K)] [PSOldGen:
1372K-1372K(174784K)] 1372K-1372K(251264K) [PSPermGen:
6746K-6746K(16384K)], 0.0198550 secs] [Times: user=0.01 sys=0.00,
real=0.02 secs]
Comparing several such outputs shows that PermGen is stable (not
increasing, not decreasing).
Almost all of the memory allocation happens in the YoungGen and rarely
in the OldGen. This is normal because Label objects are created and
then discarded.
On Sun, Jul 10, 2011 at 11:37 AM, Martin Grigorovmgrigo...@apache.org wrote:
Hi,
About the use cases: my experience is that most of the time the uses
the in-memory pages (for each listener callback execution, for ajax
requests,...).
Previous version of a page, or previous page is needed when the user
clicks browser back button. Even in this case most of the time the
in-memory cache is hit. Only when the user goes several pages back and
this page is not in-memory then the disk store is used.
So far so good, but...! Even in-memory store contains serialized
versions of the Page, named SerializedPage. This is a struct which
contains
{
sessionId: String,
pageId: int,
data: byte[]
}
so the Page is serialized back and forth when stored in *any*
IPageStore/IDataStore.
This is the current state in Wicket 1.5.
Me and Pedro noticed that IPageStore impl (DefaultPageStore) can be
improved to work with Page instances but we decided to postpone this
optimization for 1.5.0+.
About new String(someLiteral): I don't remember lately seeing this
code neither in libraries, nor in applications. This constructor
should be used only when the developer explicitly wants this string to
not be interned and stored in the PermGen space, i.e. it will be
stored in the heap space.
Your benchmark test tests exactly this - the heap space.
I'll try the app with MemoryMXBean to see whether the non-heap changes
after deserialization.
I'm not very into Java Serialization but indeed it seems the Strings
are deserialized in the heap. But even in this case they go in the
Eden space, i.e. they are reclaimed soon after.
On Sun, Jul 10, 2011 at 2:37 AM, richard emberson
richard.ember...@gmail.com wrote:
I you run the little Java program I included, you will see that
there is an impact - de-serialized objects take more memory.
Richard
On 07/09/2011 05:23 PM, Igor Vaynberg wrote:
string literals are interned by the jvm so they should have a minimal
memory impact.
-igor
On Sat, Jul 9, 2011 at 5:10 PM, richard emberson
richard.ember...@gmail.comwrote:
Martin,
The reason I was interested was because it struck me a couple of
days ago that while each Page, tree of Components, is created
many (almost all?) of the non-end-user-generated Strings stored
as instance variables in the tree are shared
between all copies of the Page but that when such a Page is
serialized to disk and then de-serialized, each String becomes its own
copy unique to that particular Page. This means that if an
appreciable number of Pages in-memory are reanimated Pages, then
there could be a bunch of memory being used for all the String
copies.
In the attached simple Java file (yes, I still write Java when I must)
there are three different ways of creating an array of
Label objects (not Wicket Label) where each Label takes a String:
new Label(some_string)
The first is to share the same String over all instance of the Label.
new Label(the_string)
The second is to make a copy of the String when creating each
Label;
new Label(new String(the_string))
The third is to create a single Label, serialize it to an array of
bytes and then generate the Labels in the array by de-serialized
the byte array for each Label.
Needless to say, the first uses the least memory; the label string
is shared by all Labels while the second and third approach
uses more memory. Also, if during the de-serialization process, the
de-serialized String is replaced with the original instance of the
String, then the third approach uses only as much memory as the
first approach.
No rocket science here, but it does seem to imply that if a
significant number of Pages in-memory are actually reanimated Pages,
then there could be a memory saving by
making de-serialization smarter about possible shared objects.
Even it it is only, say, a 5% saving for only certain Wicket
usage patterns, it might be worth looking into.
Hence, my question to the masters of Wicket and
Re: Page De-Serialization and memory
On Mon, Jul 11, 2011 at 5:12 PM, richard emberson
richard.ember...@gmail.com wrote:
When you say 1 times, you set NOS_TIMES to 1?
I mean NOS_TRIALS.
(NOS_TIMES should have been called ARRAY_SIZE).
Richard
On 07/11/2011 05:38 AM, Martin Grigorov wrote:
Running the third method (the 'problematic' one) 1 times shows no
changes in the PermGen space in VisualVM graphics.
The value is stable at 7.9Mb.
MemoryMXBean shows that non-heap space increases more than heap space
but I didn't find any resource explaining what is included in this
non-heap statistics.
The proof that PermGen is quite stable can be seen with: -verbose:gc
-XX:+PrintGCDetails
It produces something like:
[Full GC (System) [PSYoungGen: 0K-0K(76480K)] [PSOldGen:
1372K-1372K(174784K)] 1372K-1372K(251264K) [PSPermGen:
6746K-6746K(16384K)], 0.0198550 secs] [Times: user=0.01 sys=0.00,
real=0.02 secs]
Comparing several such outputs shows that PermGen is stable (not
increasing, not decreasing).
Almost all of the memory allocation happens in the YoungGen and rarely
in the OldGen. This is normal because Label objects are created and
then discarded.
On Sun, Jul 10, 2011 at 11:37 AM, Martin Grigorovmgrigo...@apache.org
wrote:
Hi,
About the use cases: my experience is that most of the time the uses
the in-memory pages (for each listener callback execution, for ajax
requests,...).
Previous version of a page, or previous page is needed when the user
clicks browser back button. Even in this case most of the time the
in-memory cache is hit. Only when the user goes several pages back and
this page is not in-memory then the disk store is used.
So far so good, but...! Even in-memory store contains serialized
versions of the Page, named SerializedPage. This is a struct which
contains
{
sessionId: String,
pageId: int,
data: byte[]
}
so the Page is serialized back and forth when stored in *any*
IPageStore/IDataStore.
This is the current state in Wicket 1.5.
Me and Pedro noticed that IPageStore impl (DefaultPageStore) can be
improved to work with Page instances but we decided to postpone this
optimization for 1.5.0+.
About new String(someLiteral): I don't remember lately seeing this
code neither in libraries, nor in applications. This constructor
should be used only when the developer explicitly wants this string to
not be interned and stored in the PermGen space, i.e. it will be
stored in the heap space.
Your benchmark test tests exactly this - the heap space.
I'll try the app with MemoryMXBean to see whether the non-heap changes
after deserialization.
I'm not very into Java Serialization but indeed it seems the Strings
are deserialized in the heap. But even in this case they go in the
Eden space, i.e. they are reclaimed soon after.
On Sun, Jul 10, 2011 at 2:37 AM, richard emberson
richard.ember...@gmail.com wrote:
I you run the little Java program I included, you will see that
there is an impact - de-serialized objects take more memory.
Richard
On 07/09/2011 05:23 PM, Igor Vaynberg wrote:
string literals are interned by the jvm so they should have a minimal
memory impact.
-igor
On Sat, Jul 9, 2011 at 5:10 PM, richard emberson
richard.ember...@gmail.com wrote:
Martin,
The reason I was interested was because it struck me a couple of
days ago that while each Page, tree of Components, is created
many (almost all?) of the non-end-user-generated Strings stored
as instance variables in the tree are shared
between all copies of the Page but that when such a Page is
serialized to disk and then de-serialized, each String becomes its own
copy unique to that particular Page. This means that if an
appreciable number of Pages in-memory are reanimated Pages, then
there could be a bunch of memory being used for all the String
copies.
In the attached simple Java file (yes, I still write Java when I must)
there are three different ways of creating an array of
Label objects (not Wicket Label) where each Label takes a String:
new Label(some_string)
The first is to share the same String over all instance of the Label.
new Label(the_string)
The second is to make a copy of the String when creating each
Label;
new Label(new String(the_string))
The third is to create a single Label, serialize it to an array of
bytes and then generate the Labels in the array by de-serialized
the byte array for each Label.
Needless to say, the first uses the least memory; the label string
is shared by all Labels while the second and third approach
uses more memory. Also, if during the de-serialization process, the
de-serialized String is replaced with the original instance of the
String, then the third approach uses only as much memory as the
first approach.
No rocket science here, but it does seem to imply that if a
significant number of Pages in-memory are actually reanimated Pages,
then there could be a memory saving by
making de-serialization
Re: Basic question on Developing FormComponentPanels
we override convertinput() so code like this still works
formcomponentpanelfoo p=new formcomponentpanelfoo(...);
p.add(new ivalidatorfoo() { })
if we do not override convertinput then the validator will not have a
value to validate
-igor
On Mon, Jul 11, 2011 at 6:28 AM, Nazaret Kazarian
nazaret.kazar...@gmail.com wrote:
The recommended way for developing a FormComponentPanel is to override
onBeforeRender and convertInput. My question is my not override
updateModel() to synchronize the model of the custom
FormComponentPanel with the models of the nested components instead of
overriding convertInput? Wouldn't that be more symmetrical with
onBeforeRender?
model - nestedModels (onBeforeRender)
nestedModel - model (onUpdate).
Thanks!
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Re: Getting A Random Localized Resource (CSS Image) Instead Of Page
is this sort of related to wicket-2204 ? i've seen this issue in the tracker On Mon, Jul 11, 2011 at 9:41 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: btw, before the error occurrs, there would be instances in which the server would not reply here's an example scenario. a. Was able to login ppoerly b. Updated a client info (changed the alternate email address) c. Clicked the Transfer link, inputted the necessary information and clicked the Submit button, nothing d. Clicked again the submit button, nothing happend again. 5. Clicked the Refresh button The CSS image then appears there awere also instances in which the link was clicked, did not reply. then after clicking again, the css image appeared again. any ideas? On Mon, Jul 11, 2011 at 8:41 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: does it have any effect? On Mon, Jul 11, 2011 at 7:45 PM, Horacio Natyural horacio.natyu...@gmail.com wrote: thanks for the info.. martin, someone used getRequestCycle().setRedirect(true); Thanks for all the help On Mon, Jul 11, 2011 at 6:05 PM, Wilhelmsen Tor Iver toriv...@arrive.no wrote: From: Horacio Natyural [mailto:horacio.natyu...@gmail.com] What are the implications of this error message? Wicket will ignore any overriding (on the Page level) of the property, only the component's own (and the Application's?) properties files will be used. E.g. if FooComponent.properties has fie=Some default and FooPage.properties has myfoocomponent.fie=Another value then calling getString(fie) in the constructor will return Some default because there is no FooPage in the hierarchy yet. - Tor Iver - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Skip validation on nested form's form level validators
Hi, well i _could_ decouple the two forms but that would kinda break my usecase and also the layout due to the changed component hierarchy. Removing and readding the validators does not strike me as a good idea though, that would mean that the outer form would have knowledge about the internals of the inner form, which would break not only cohesion but also the law of demeter. I was thinking that since there is a defined way to let a form decide for itself if it's component's validators should be executed that there might also be a similar way to do this for form level validators. But it seems that this is not the case. So I guess I will try disabling the default form processing on the outer form and call it's component's validators manually in the onsubmit method of the corresponding button. Anyway thanks for your time. Am 11.07.2011 15:01, schrieb Andrea Del Bene: Hi, why don't simply put the inner form out of the outer one? Anyway, you could remove inner form's validators before the outer form is submitted and add them again when submit process is over (onFormSubmitted() ) Hi all, I have two forms nested within each other (wicket 1.4.17). The inner form adds data to the model of the outer form via ajax when it's button is pressed while the outer form saves the data to the database when the outer form's submit button is pressed. Both forms have validators attacehd to them and their components. and of course the inner form's validators must not be executed when the outer form is submitted. Having the inner form implement IFormVisitorParticipant and then check if the submitting button was it's own avoids the inner form's component's validators to be executed. But validators applied to the inner form directly (e.g. EqualInputValidators etc.) are still executed and in my case causing the request to die horribly because the requred data just is not there. I was looking for an elegant way to solve this but since all validate methods in the hierarchy are final I cannot hook any code into the form's on validation cycle. The method onValidate is not called (I guess that is because the form is validated as the outer form's child). All other methods that allow me to achieve the deisred behavior (like isEnabled) are too general cause side effects like disabling the form. At the moment the only way I can think of is to disable default form processing and then call the validators manually which is not very appealing to me. Is there another way how this can be done? Cheers, Chris - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- The Sanity Resort http://sanityresort.blogspot.com/
Sessions and Login Redirection
Hi all, Our application's home / login page is stateless, so its initial request doesn't establish a session. In the login form's onSubmit the user is authenticated, his credentials are put into the session, and he is redirected to a page that requires the user to be authenticated. The problem is that the onSubmit response (an HTTP redirection) does not set the session cookie, so the credentials get lost. Is this an HTTP or servlet limitation associated with redirects? Is there a solution that doesn't require the page to be stateful? Thanks! Dan
Re: Sessions and Login Redirection
Use session.bind() to actually bind the session. Otherwise WIcket is in the dark that you actually want to keep the session around... Martijn On Mon, Jul 11, 2011 at 10:10 PM, Dan Retzlaff dretzl...@gmail.com wrote: Hi all, Our application's home / login page is stateless, so its initial request doesn't establish a session. In the login form's onSubmit the user is authenticated, his credentials are put into the session, and he is redirected to a page that requires the user to be authenticated. The problem is that the onSubmit response (an HTTP redirection) does not set the session cookie, so the credentials get lost. Is this an HTTP or servlet limitation associated with redirects? Is there a solution that doesn't require the page to be stateful? Thanks! Dan -- Become a Wicket expert, learn from the best: http://wicketinaction.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Sessions and Login Redirection
That's it. I now call session.bind() in requestCycle.onEndRequest() if credentials are set. I thought I'd tried that before, but I must have deployed or tested incorrectly. Thanks, Martijn. On Mon, Jul 11, 2011 at 1:35 PM, Martijn Dashorst martijn.dasho...@gmail.com wrote: Use session.bind() to actually bind the session. Otherwise WIcket is in the dark that you actually want to keep the session around... Martijn On Mon, Jul 11, 2011 at 10:10 PM, Dan Retzlaff dretzl...@gmail.com wrote: Hi all, Our application's home / login page is stateless, so its initial request doesn't establish a session. In the login form's onSubmit the user is authenticated, his credentials are put into the session, and he is redirected to a page that requires the user to be authenticated. The problem is that the onSubmit response (an HTTP redirection) does not set the session cookie, so the credentials get lost. Is this an HTTP or servlet limitation associated with redirects? Is there a solution that doesn't require the page to be stateful? Thanks! Dan -- Become a Wicket expert, learn from the best: http://wicketinaction.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: YSlow still complaining Add Expires headers
Am 11.07.2011 14:44, schrieb Martin Grigorov:
See what happens in
org.apache.wicket.markup.html.WebResource.setHeaders(WebResponse).
Then check the response headers for your resources.
I guess that your resources are located next to WEB-INF folder and are
delivered directly by the web container and thus Wicket doesn't set
the headers.
If this is the case then you here are two options:
- check your web container documentation
- add a filter in web.xml that will set the headers for all requests
to /css/*.css, /js/*.js, ...
Thanks Martin, that helped! I wrote a filter:
@Override public void doFilter(ServletRequest request, ServletResponse
response,
FilterChain chain) throws IOException, ServletException {
HttpServletResponse rsp = (HttpServletResponse) response;
SimpleDateFormat formatter = new
SimpleDateFormat(Helper.cacheDateFormatString);
formatter.setTimeZone(TimeZone.getTimeZone(GMT));
int minutes = 30 * 24 * 60;
rsp.setHeader(Cache-Control, public, max-age= + minutes * 60);
chain.doFilter(request, response);
}
Also this helped with all the confusing options in the header:
http://onjava.com/pub/a/onjava/2004/03/03/filters.html?page=2
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RE: [ANNOUNCE] Wicketopia 0.9 Released...
I am working on making it works on GAE/J. But stuck at bean id=dataSource class=org.springframework.jdbc.datasource.DriverManagerDataSource property name=driverClassName value=org.vnetcon.blobdb.driver.jdbc.BlobDBDriver / property name=url value=blobdb|http://localhost:/blobdb/ws|username=username|password=password / property name=username value=sa / property name=password value= //bean And the partial error - WARNING: Could not obtain connection to query metadatajava.sql.SQLException: URL is not in the correct format: blobdb|http://localhost:/blobdb/ws|username=username|password=password at com.google.cloud.sql.jdbc.internal.Exceptions.driverUrlNotInCorrectFormat(Exceptions.java:103) at com.google.cloud.sql.jdbc.Driver.connect(Driver.java:47) at com.google.cloud.sql.jdbc.Driver.connect(Driver.java:24) at java.sql.DriverManager.getConnection(DriverManager.java:582) at java.sql.DriverManager.getConnection(DriverManager.java:154) at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:173) I posted the error with GAE forum :) Will let you know how it goes. J Date: Sun, 10 Jul 2011 20:21:13 -0700 From: ml-node+3658631-962999233-250...@n4.nabble.com To: androidcool...@hotmail.com Subject: Re: [ANNOUNCE] Wicketopia 0.9 Released... Hi James Great effort mate thanks, Haven't had a look as yet am sure it will be useful. If you need help with documentation do let us know Cheers On Mon, Jul 11, 2011 at 8:51 AM, androidcoolguy [hidden email]wrote: Ok after some struggling, I managed to get it work. I noticed that Wicketopia has a tight coupling with Hibernate, especially - bean id=persistenceProvider class=org.wicketopia.persistence.hibernate.HibernatePersistenceProvider property name=sessionFactory ref=sessionFactory/ /bean And the codes needs sessionFactory to be initialized (not null), in order to work. That was why I were having NPE. Is there any plan to support Google App Engine for Java? I can help out if you can give me some guidelines. Thanks for such an awesome framework! -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/ANNOUNCE-Wicketopia-0-9-Released-tp3418771p3658471.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: [hidden email] For additional commands, e-mail: [hidden email] If you reply to this email, your message will be added to the discussion below: http://apache-wicket.1842946.n4.nabble.com/ANNOUNCE-Wicketopia-0-9-Released-tp3418771p3658631.html To unsubscribe from [ANNOUNCE] Wicketopia 0.9 Released..., click here. Insert mode -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/ANNOUNCE-Wicketopia-0-9-Released-tp3418771p3661170.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Help with path mounting and static asset expiration
Hi guys, We've just finished our first wicket app using wicket 1.4.17. Everything works well, but we get a lot of resource requests for resource that rarely change. I've read a few blogs on the subject, and this one is the closest to what I want to do, however it's not quite right. http://techblog.molindo.at/2008/08/wicket-interface-speed-up-caching-resources-forever.html This explicitly calls the code to wrap the resource, I don't want our developers to have to do this. We have several templates that use wicket's autolinking feature, so I would like them to be able to use it as well. Here's what I currently have. A Custom resource loader that is simply a wrapper and delegates to WebApplicationPath for resource loading. Once the resource is loaded, if it ends in .js, .css, or .png an SHA sum is calculated on the file contents.I then want to create a mount path in the format of original file_sha256.original extension I also then need to wrap the created resource with an expiration time of now + 1 month. This way, our images can be cached completely on the client. In the event the file changes, the sha256 sum will change, and hence so will the file name's url, forcing the client to re-download the new content. Any thoughts on how I can do this? I'd prefer to only do it once the first time the resource is loaded, but I can only seem to override the ResourceFinder using the above logic, which does not give me access to the created ResourceReference itself with wicket expiration and other properties. I thought about using a listener, but this requires the mapping to happen with each request, which seems very inefficient since it will only change at deploy time. Any help would be greatly appreciated, I'm at a bit of a loss on this one. Thanks, Todd
RE: [ANNOUNCE] Wicketopia 0.9 Released...
More good news. I used JPA provider instead of hibernate by looking at your
latest codes to make Wicketopia works on GAEJ.
Also have to change the JpaPersistenceProvider in such a way -
public int getCount(Class? entityType)
{
Integer results = (Integer) entityManager.createQuery(select
count(obj) from + entityType.getName() + obj).getSingleResult();
return results.intValue();
//List results = entityManager.createQuery(select count(*) from +
entityType.getName()).getResultList();
//return ((Number)results.get(0)).intValue();
}
I left off at the create method while saving the Person. Error is -
java.lang.UnsupportedOperationException: This feature isn't available until
JPA 2.0
You can try yourself at http://cloudserviceapi.appspot.com/app/ to see the
error. Note that I removed some fields like start date and end date as they
were on my way to complete the port :(
I have proven my track record, could you make me a committer of project
Wicketopia now :) ?
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