Hello all, Further to email sent out back on 15/06/07 regarding concurrency issues using Wicket 1.2.4. Really keen to know best place to get a list of outstanding defects between releases wicket 1.2.4 and 1.2.6 is located? Are there release notes / URL links etc with this info easily available? Apache issues list starts with version 1.2.7 but this is no good in our case. Our concurrency problem can be reproduced without load testing s/w and (after exhaustively going through all our "static" code usages and other possible areas of contention) likely explanation now sits with the version of Wicket we're using. The Wicket website does include a section about a critical bug in 1.2.4. In our case, if this is the problem, then it has proven to be a show-stopper. Another point I'd really like to hear discussion about:- we're using WID version 2.0.1.2 which provides support for Java 1.4. At present, this limits us up to Wicket 1.3 - will there be ongoing maintenance support for users unable to migrate further due to limitations in the current app server versions of Java support available? As developers, we're definitely pro-Wicket but getting nervous regarding this project's usage of Wicket and outstanding defects. Especially with migration route options outlined above.
Hope some of you can put these fears to rest? Cheers, Rich. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Alex Objelean Sent: 15 June 2007 09:48 To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] AJAX causing UI state corruption.... I recommend you to use wicket-1.2.6. This version is better and have some useful fixes, including ajax related. Regarding the transparency issue, I recommend to use the http://malsup.com/jquery/block/ jquery.block plugin , or at least take it as an example for your own js implementation. I have my own light version of this plugin.. Seldon, Richard wrote: > > > Sure Alex, what i meant was that in order to get IFRAME to be transparent > i > tried a combination of setting allowtransparency="true" as an attribute on > the IFRAME element and then in css class definition for the IFRAME put in: > filter:"progid:DXImageTransform.Microsoft.Alpha(style=0, opacity=0)"; > Alpha > handles opacity allowing effectively transparency for the underlying page > content (didn't work with select form component though). > > Note IE worked for textfields (input type="text") html form components > with > these settings. it was the select that failed. Below is an example snippet > code with z-indexes to illustrate this point. the z-index is a constant > in > the example: > > <HTML> > <HEAD> > <TITLE>Z-Index</TITLE> > <script> > function setindex() > { > div1.style.zIndex=text1.value; > select1.style.zIndex=text2.value; > getindexes(); > } > > function getindexes(){ > > text1.value=div1.style.zIndex; > text2.value=select1.style.zIndex; > text3.value=5; > } > </script> > </HEAD> > <BODY onload="getindexes()"> > > Div > <input type="text" value="" id=text1 name=text1 ><p> > > Select > <input type="text" value="" id=text2 name=text2><p> > > IFrame > <input type="text" value="" id=text3 name=text3><p> > <input type="button" value="Set Z-Index" id=button1 name=button1 > onclick="setindex()"> > <DIV id=div1 name=div1 > style="width:200;height:200;background-color:lightblue; > position:absolute;left:350;top:250;z-index:">DIV</DIV> > <select id=select1 name=select1 > style=";position:absolute;left:300;top:400;width=500;z-index:" > size=1 > > <option>Option1 > <option>Option2 > <option>Option3 > </select> > <IFRAME id=iframe1 name=iframe1 src="" scroll=none > style="width:100;height:115;position:absolute; > left:400;top:300;border-color:green;z-index:5;"></iframe> > </BODY> > </HTML> > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Alex > Objelean > Sent: 14 June 2007 20:43 > To: wicket-user@lists.sourceforge.net > Subject: Re: [Wicket-user] AJAX causing UI state corruption.... > > > > Can you explain what do you mean by " but iframe transparency issues > meant > access to underlying > form component."? > > I am using option 2 to avoid UI state corruption and didn't have any > problems with it. > > > Seldon, Richard wrote: >> >> >> Experiencing a wicket problem to do with UI state corruption when using >> ajax >> tabbed panel. When the ajax links are rapidly clicked in succession >> various >> validation errors appear relating to panels that are hidden, form >> component >> drop downs lose their display UI values and UI state basically becomes >> "v.confused". Have not observed this behavior elsewhere but somehow it >> seems >> like the ajax requests are not stacking correctly or at least are losing >> synch with the UI rerendering somehow. >> >> Below are all the steps (in brevity) so far attempted and some unanswered >> questions I still have:- >> >> (1) Tried IAjaxIndicatorAware on individual form components and >> overridden >> tabbed panel links. Used this in conjunction with a server side request >> throttler. Basically wrote a timer class that intercepts onsubmit >> requests >> and rejects (returns without processing further) on any entered with >> given >> 2 >> second interval using standard Java api class implementations. This >> approach does actually work but doesn't explain why we're having this >> problem in first place? >> >> (2) Tried a DIV interceptor approach hooking into >> Wicket.Ajax.registerPreCallHandler, postcall, and failure. The idea was >> to >> cover the entire screen with a transparent div whilst asynch call being >> made - however, problematic using IE 6 but works with firefox. >> Essentially, >> seems IE deals with windowed and windowless components and certain html >> form components are windowed such as select. z-indexes are not respected >> between the two types and therefore setting div z-index higher than >> select >> z-index doesn't work. tried workaround using an iframe (which covers both >> z-indexes in IE6) but iframe transparency issues meant access to >> underlying >> form component. >> >> (3) Looked at wicket-ajax.js - was interested with configuration of the >> channels settings - but unsure how to get an appropriate configuration >> fix. >> There is an indicator between setting which gets read by reading out of >> a >> regex a character value of either 'd' or 's' where from what i can see >> 's' >> ensures requests are stacked. Found some help in an older newsgroup >> which >> mentions that "{wicket has "ajax channels" with different channel modes >> such >> as queue/disregard. that way you can disable certain groups of components >> only by assigning them to the same ajax channel.}" Looking at the wicket >> java api i couldn't manage to find any handle to setting this flag up. >> Is >> this a direct wicket-ajax.js edit and if so then my question would be >> "What >> is an "elegant" way to override the default to use 'd'?" >> >> (4) Finally, switched the asynch flag to "false" by editing >> wicket-ajax.js >> directly (this.type in request prototype class). This resolved the >> original >> problem but uncertain what the consequences of doing this are. Is this >> safe >> and is there any Java api accessible means to do this? In firefox by >> inspecting ajax responses via an ajax plugin, it seemed to indicate ajax >> requests yet the page is flickering on rerender much like a full page >> resubmission would. Does ajax submission still work or is it the main UI >> thread that now handles form submissions? >> >> >> This e-mail (and any attachments) may contain privileged and/or >> confidential information. If you are not the intended recipient please do >> not disclose, copy, distribute, disseminate or take any action in >> reliance >> on it. If you have received this message in error please reply and tell >> us >> and then delete it. Should you wish to communicate with us by e-mail we >> cannot guarantee the security of any data outside our own computer >> systems. 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