RE: Wicket and memory, caching
Berlin Brown – Software Developer Primerica Online Primerica_Online_-_Java_Development 770-564-6374 -Original Message- From: Martin Grigorov [mailto:mgrigo...@apache.org] Sent: Monday, March 10, 2014 4:03 AM To: users@wicket.apache.org Subject: Re: Wicket and memory, caching Hi, On Sat, Mar 8, 2014 at 9:24 PM, Brown, Berlin [PRI-1PP] berlin.br...@primerica.com wrote: We are running into memory issues and it looks like wicket stores a lot of data in heap memory but also a lot of data is stored in session. Some numbers that prove your words would really help here! Percenage wise, the numbers are pretty high. Out of a 1.5 gig heap, we see the WicketApplication eating up 1% of the heap. We aren't that concerned with page versioning or caching approaches. E.g. we can just turn all of that off. We thought about using setVersioning to false for all components. Also use the leastevictionstrategy and not use the secondlevelsessionstore. What is leastevictionstrategy ?! Sorry: package org.apache.wicket.session.pagemap; LeastRecentlyAccessedEvictionStrategy secondlevelsessionstore is DefaultPageStore that by default holds up to 40 pages. Let's say an average size of a page is 500Kb (and this is a really big/complex page!) then this cache adds 20Mb in total. Not sure about Wicket 1.4.x but in 1.5+ you can disable it by setting its size to any non-positive number (see IStoreSettings) In addition to that, we see one object that seems to eat up a lot of heap: WicketApplication - Settings - MarkupCache$DefaultCacheImplementation For this object MarkupCache, if we change the caching strategies, will the MarkupCache not fill up so much? Is there any setting that controls the MarkupCache? MarkupCache holds the contents of the markup files (the .html templates). This helps to avoid re-loading the content from the file system again and again. How much memory it uses ? The MarkupCache is stored in the Settings object and eventually the WicketApplication. Usually about 1% of a 1.5 gig heap. Higher than objects. Especially since there is only one wicket application. Is there way to control the MarkupCache? Or is that part of the page store settings? Note: still using an old release 1.4.x (latest) Berlin Brown
Wicket and memory, caching
We are running into memory issues and it looks like wicket stores a lot of data in heap memory but also a lot of data is stored in session. We aren't that concerned with page versioning or caching approaches. E.g. we can just turn all of that off. We thought about using setVersioning to false for all components. Also use the leastevictionstrategy and not use the secondlevelsessionstore. In addition to that, we see one object that seems to eat up a lot of heap: WicketApplication - Settings - MarkupCache$DefaultCacheImplementation For this object MarkupCache, if we change the caching strategies, will the MarkupCache not fill up so much? Is there any setting that controls the MarkupCache? Note: still using an old release 1.4.x (latest) Berlin Brown
Web app vulnerability protection in wicket (csrf)
Does wicket have support for top vulnerabilities? Mainly I am trying to protect against cross site scripting and cross site request forgery attacks. I haven't found anything yet explicitly for those attacks but for CSRF, I was going to try to use the encrypted URL strategy. (And I am assuming the default URL versioning strategy or the random parameter on the url is not a full protection against those attacks?). Also, for csrf, is there an easy way to inject tokens for each request, if those tokens are valid, then we could generate an error. Note: I am assuming an ancient version of wicket.1.4.x(1.4.15).
RE: OT: good java hosting
It is a little pricey. But I prefer linode for virtual hosting. And they have good docs on tomcat configuration -Original Message- From: Ernesto Reinaldo Barreiro [mailto:reier...@gmail.com] Sent: Thursday, January 16, 2014 9:55 AM To: users@wicket.apache.org Subject: Re: OT: good java hosting Dank je wel! On Thu, Jan 16, 2014 at 3:52 PM, Thomas Matthijs li...@selckin.be wrote: hetzner.de On Thu, Jan 16, 2014 at 3:50 PM, Ernesto Reinaldo Barreiro reier...@gmail.com wrote: Danje wel, Bijvoorbeeld? Thanks! On Thu, Jan 16, 2014 at 3:43 PM, Thomas Matthijs li...@selckin.be wrote: On Thu, Jan 16, 2014 at 2:54 PM, Ernesto Reinaldo Barreiro reier...@gmail.com wrote: Apologies for the OT message... but I value the opinion of people in this list. Can you suggest a good place to host Wicket applications? I'm hosting a couple of them somewhere I'm NOT very satisfied with service provided. I started to compare offers myself... but a bit of help on that direction will be appreciated. 1- Applications are not very resource/traffic intensive. 2- Quality of support/up time should be good. 3- Just need any relational database. A cheapish dedicated server might be ideal for this, (and way cheaper then anything that even hits at cloud) For 50eur/month you can have 32gb ram quad core i7s mvg, -- Regards - Ernesto Reinaldo Barreiro -- Regards - Ernesto Reinaldo Barreiro - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Wicket and HTML5/jQuery or Dojo
Will Wicket support most of the HTML5 tags? Canvas? footer header etc? Can wicket support plug and play javascript frameworks. I asked this on reddit: http://www.reddit.com/r/java/comments/1s5tq6/what_is_the_java_serverside_response_to_html5_and/
RE: Wicket and HTML5/jQuery or Dojo
Would wicket make it easier to use those tags. Could I just throw in a Footer object or Meter object into my code (from the core library). Yes, I guess I could create custom components for it. But is there a strategy to respond to those components or not mention them at all? -Original Message- From: Martin Grigorov [mailto:mgrigo...@apache.org] Sent: Friday, December 13, 2013 10:21 AM To: users@wicket.apache.org Subject: Re: Wicket and HTML5/jQuery or Dojo Hi, You are a long time Wicket user so I hope you have a good answer for: How Wicket stands on your way to use canvas, header, footer or any JavaScript library ? Does Wicket throw exceptions when it sees header ? No. Just use whatever does the job the best way for you. Martin Grigorov Wicket Training Consulting On Fri, Dec 13, 2013 at 5:12 PM, Brown, Berlin [PRI-1PP] berlin.br...@primerica.com wrote: Will Wicket support most of the HTML5 tags? Canvas? footer header etc? Can wicket support plug and play javascript frameworks. I asked this on reddit: http://www.reddit.com/r/java/comments/1s5tq6/what_is_the_java_serversi de_response_to_html5_and/
RE: Wicket and HTML5/jQuery or Dojo
OK, just making sure. And footer is a bad example, but like I see in that code, there might special scenarios for using Geolocation tags or canvas tags. Shrug. -Original Message- From: Martin Grigorov [mailto:mgrigo...@apache.org] Sent: Friday, December 13, 2013 10:44 AM To: users@wicket.apache.org Subject: Re: Wicket and HTML5/jQuery or Dojo How footer is different than div ? You can associate it with WebMarkupContainer, or with Panel. It depends what you want to do with it. https://github.com/wicketstuff/core/tree/master/jdk-1.6-parent/wicket-html5-parent provides components for some HTML5 elements. Anyone is welcome to add more if (s)he thinks they will be useful Martin Grigorov Wicket Training Consulting On Fri, Dec 13, 2013 at 5:33 PM, Brown, Berlin [PRI-1PP] berlin.br...@primerica.com wrote: Would wicket make it easier to use those tags. Could I just throw in a Footer object or Meter object into my code (from the core library). Yes, I guess I could create custom components for it. But is there a strategy to respond to those components or not mention them at all? -Original Message- From: Martin Grigorov [mailto:mgrigo...@apache.org] Sent: Friday, December 13, 2013 10:21 AM To: users@wicket.apache.org Subject: Re: Wicket and HTML5/jQuery or Dojo Hi, You are a long time Wicket user so I hope you have a good answer for: How Wicket stands on your way to use canvas, header, footer or any JavaScript library ? Does Wicket throw exceptions when it sees header ? No. Just use whatever does the job the best way for you. Martin Grigorov Wicket Training Consulting On Fri, Dec 13, 2013 at 5:12 PM, Brown, Berlin [PRI-1PP] berlin.br...@primerica.com wrote: Will Wicket support most of the HTML5 tags? Canvas? footer header etc? Can wicket support plug and play javascript frameworks. I asked this on reddit: http://www.reddit.com/r/java/comments/1s5tq6/what_is_the_java_server si de_response_to_html5_and/
Modern javascript/html code generation, is Wicket the only one?
This is more a general question. Is wicket pretty much the only mainstream java framework that generates javascript calls from Java code. E.g. Wicket generates ajax code for those particular widgets. With the web moving to javascript heavy frameworks, does struts/spring mvc really stand up if they just generating pure HTML. Also for wicket, is there a move to use more jquery or some other javascript framework, more javascript?
RE: Possible asynchronous ajax operations with form ajaxsubmitlink
I don't know how the page serialization matters. But I just did a test
case and a user can submit ajax requests to wicket asynchronously but
the requests are processed as part of a queue and the processing is
synchronous.
Is that mechanism handled in Java side/server side? What classes?
-Original Message-
From: Sven Meier [mailto:s...@meiers.net]
Sent: Thursday, September 12, 2013 9:29 AM
To: users@wicket.apache.org
Subject: Re: Possible asynchronous ajax operations with form
ajaxsubmitlink
No, because all access to Wicket pages is serialized (on the server).
Sven
On 09/12/2013 03:20 PM, Brown, Berlin [PRI-1PP] wrote:
Is it possible for wicket to execute operations asynchronously in
terms of handling ajax calls.
For example, if I have an ajax submit link.
AjaxSubmitLink1 {
OnSubmit() {
runLongRunningOperation();
// Imagine this operation runs 10 seconds
}
}
AjaxSubmitLink2 {
OnSubmit() {
runLongRunningOperation();
// Imagine this operation runs 2 seconds
}
}
Let's say a user clicks on ajaxsubmitlink1 and then ajaxsubmitlink2.
(1)Runs in 10 seconds.
(2)Runs in 5 seconds.
Is it possible that ajax submit link2 will complete before
ajaxsubmitlink1 even though the user click on 1 first?
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Possible asynchronous ajax operations with form ajaxsubmitlink
Is it possible for wicket to execute operations asynchronously in terms
of handling ajax calls.
For example, if I have an ajax submit link.
AjaxSubmitLink1 {
OnSubmit() {
runLongRunningOperation();
// Imagine this operation runs 10 seconds
}
}
AjaxSubmitLink2 {
OnSubmit() {
runLongRunningOperation();
// Imagine this operation runs 2 seconds
}
}
Let's say a user clicks on ajaxsubmitlink1 and then ajaxsubmitlink2.
(1)Runs in 10 seconds.
(2)Runs in 5 seconds.
Is it possible that ajax submit link2 will complete before
ajaxsubmitlink1 even though the user click on 1 first?
