Re: Concerning DataModel usage plus overhead?
Kevin, I am trying to get Sylvain involved in this to explain forceIndexFormula better (hint: this should be in the documentation ;) - but I believe that his solution is somewhat similar to your suggestion! Particularly, you just get the id of the data row as part of the client-id in your action, and it is your responsibility then to fetch this row! regards, Martin On 8/30/05, Kevin Galligan [EMAIL PROTECTED] wrote: My brain is very struts centric as well. There's some things I like about the JSF model too though. Thats why I'm probably landing somewhere in between. I generally avoided session scoping anything that didn't need to be, which I guess is my big reservation with JSF. I know exactly what you mean with the lazy list in the form. You do have some extra effort involved, like building the property string on the input objects and tracking the id's in a hidden input component, but there's not as much going on behind the curtain either. I think that's enough for today though... Rick Reumann wrote: On 8/30/05, Kevin Galligan [EMAIL PROTECTED] wrote: I think updating several rows at the same time, which might require local copies of the data, and just linking are two different things. They might need two different components. With Struts this was a piece of cake. Your ActionForm has a bean property that is a List of the objects you want to update (Helps if it's a LazyList if not using session scope), and when your form submits BeanUtils (in the background) simply copies your form objects to the List in the Action form. Super simple imo. The only slightly tricky part is validation, but I always provide a manual validation method in my Action classes so this was easy to handle. -- http://www.irian.at Your JSF powerhouse - JSF Trainings in English and German
master detail pages
Hi all I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial. I read a lot of tutorials on page navigation and event handling... but I still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed bean but I can implement the passage to the detailed page? thanks Sam
RE: master detail pages
Hi Download the my-faces examples from http://myfaces.apache.org/binary.cgi and look at the Master-Detail in the Component menu. Balaji -Original Message- From: ::SammyRulez:: [mailto:[EMAIL PROTECTED] Sent: Wednesday, 31 August 2005 5:01 PM To: users@myfaces.apache.org Subject: master detail pages Hi all I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial. I read a lot of tutorials on page navigation and event handling... but I still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed bean but I can implement the passage to the detailed page? thanks Sam This correspondence is for the named persons only. It may contain confidential or privileged information or both. No confidentiality or privilege is waived or lost by any mis transmission. If you receive this correspondence in error please delete it from your system immediately and notify the sender. You must not disclose, copy or relay on any part of this correspondence, if you are not the intended recipient. Any opinions expressed in this message are those of the individual sender except where the sender expressly, and with the authority, states them to be the opinions of the Department of Emergency Services, Queensland.
Re: Tree2 Questions
Hi Bryan, IMHO, the lazy loading mechanism is not responsibility of the tree2 itself, but of the treemodel that provides the data to the tree2, so you can provide your own implementation using, for example, Hibernate or OJB.2005/8/30, Sean Schofield [EMAIL PROTECTED]: Please send tree2 questions to the mailing list so all users canbenefit from the answers.Also, there are many more users on the listwho can help you and the component authors do not have time to answerall of the questions individually. Regards,sean-- Forwarded message --From: Dunbar, Bryan [EMAIL PROTECTED]Date: Aug 30, 2005 11:22 AMSubject: Tree2 Questions To: [EMAIL PROTECTED]Sean - Do you have a good way to implement Lazy loading via tree2?This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) namedabove. If you receive this e-mail in error, please do not read, copyor disseminate it in any manner. If you are not the intendedrecipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to themessage immediately by informing the sender that the message wasmisdirected. After replying, please erase it from your computersystem. Your assistance in correcting this error is appreciated.
RE: master detail pages
-Original Message- I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial. I read a lot of tutorials on page navigation and event handling... but I still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed bean but I can implement the passage to the detailed page? -/Original Message- Have you checked the tutorials at: http://www.jsftutorials.net/? Basically you add a command-link as a child to a column and pass it some identifying attribute of the current row-object as a parameter. hth Alexander Else join us on the IRC-channel (search the mailing-list archives for the coordinates)...
Re: master detail pages
Just a question... Why do you need a parameter to the commandlink? Wouldn't it be sufficient to have the datatable in your backing bean and simply call getRowData()?2005/8/31, Jesse Alexander (KBSA 21) [EMAIL PROTECTED]: -Original Message-I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial.I read a lot of tutorials on page navigation and event handling... butI still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed beanbut I can implement the passage to the detailed page?-/Original Message-Have you checked the tutorials at: http://www.jsftutorials.net/?Basically you add a command-link as a child to a column and pass it someidentifying attribute of the current row-object as a parameter.hthAlexanderElse join us on the IRC-channel (search the mailing-list archives for the coordinates)...
Re: difficult savestating question
Hi Martin, This sounds interesting. Could you please tell me more precisely what does AutoUpdateDataTable do exactly? Thanks, Quique.2005/8/30, Martin Marinschek [EMAIL PROTECTED]: Hmmm...Do you want to look at AutoUpdateDataTable?We have implemented a way of fetching data from the server, and if thestate of the server changes, to change the state on the client as well(replacing the input hidden field on the client with the new state returned from the client).If I understood you correctly, this would be what you need as well!regards,MartinOn 8/30/05, Werner Punz [EMAIL PROTECTED] wrote: Hi this question goes very deep into the structures of jsf. I did some 1:n relational programming today, the idea was to have a master form with the :n relational data in a subarea of this form. My idea was to bypass the entire refresh cycle by using ajax for the display of the :n relational data, that did work execptionally well although it is plain html at the current stage. I also did the create and update cycle of the data with popup boxes which trigger the ajax releoad at the end of their operations, worked also exceptionally well. Bit I ran into one minor problem I am not sure how to solve. Currently I keep the :n relational data due to easier handling in the session, and use saveState only for the dialog handling of the popups. I would love to push the :n relational data into saveState as well, but the main problem is, with my ajax request I am kindof out of the entire JSF lifecycle, but saveStating the data would guarantee that at the next page refresh of the main master form the data would be loaded properly without having to put the burden into the session. So my question, is there a way to trigger the serialization on a bean outside of the rendering cycle, so that at cycle the altered bean gets loaded and saved properly? Werner--http://www.irian.atYour JSF powerhouse -JSF Trainings in English and German
Re: master detail pages
this would be great... I'm looking at myFaces examples... thank you all.. ps: finaly I got it http://www.oracle.com/technology/oramag/oracle/04-mar/o24dev_jsf.html 2005/8/31, Enrique Medina [EMAIL PROTECTED]: Just a question... Why do you need a parameter to the commandlink? Wouldn't it be sufficient to have the datatable in your backing bean and simply call getRowData()? 2005/8/31, Jesse Alexander (KBSA 21) [EMAIL PROTECTED]: -Original Message- I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial. I read a lot of tutorials on page navigation and event handling... but I still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed bean but I can implement the passage to the detailed page? -/Original Message- Have you checked the tutorials at: http://www.jsftutorials.net/? Basically you add a command-link as a child to a column and pass it some identifying attribute of the current row-object as a parameter. hth Alexander Else join us on the IRC-channel (search the mailing-list archives for the coordinates)... -- ::SammyRulez:: http://sammyprojectz.blogspot.com
Re: JSF success story
Hi Werner, Could you please give us extenden information about the application of xdoclet for standard CRUD maks and the use of IoC? I have a slight idea of what you're talking, but to concrete ;-) Thanks.2005/8/30, Werner Punz [EMAIL PROTECTED]: Martin Manfred and the others from vienna, know already the app, Ishowed an early beta version to them in Vienna,I could not show it publicly due to various reasonsBut just for the general public here is a small success story, I did a JSF app, around the timeframe of the 15th of may til the 15th ofjune (core crunch phase with some maintainance until now)most of the controls currently hosted on jsf-comp were developed forthat program due to the insane specs I got in last minute, which I could not get rid of.So far so good, since the beginning of june the application has beenrolled out, it is an intranet app, servicing around 60 users some ofthem working constantly with it, with around 12.000 addresses so farhammered in manually.So far not a single crash, not the slightest memory problem,a few minor bugfixes in between, and the tomcat runs on conservative128mb, with not even spiking the server which is a xeon server to 3% from time to time.The application was programmed against myfaces 1.0.9, running on aTomcat 5.5.9 under JDK 5.0I just wanted to share an internal success story, and wantedto show that myfaces can be used perfectly for real apps... It scales very well...The app uses a combination of myfaces, some ajax controls,some other controls like the client side tabbing pane,hibernate in the old incarnation, and spring forsupporting classes in the middle tier. It also used some effects from the script.aculo.us libraryand from the fat library mapped into jsf tags.The development time was dramatically reduced by the application of xdoclet for standard CRUD masks (which the app consists of around 50%)and the application of the generated classes to the IOC system of springmerged into JSF, via the Spring JSF integration library. Werner
Re: JSF success story
Enrique Medina wrote:
Hi Werner,
Could you please give us extenden information about the application of
xdoclet for standard CRUD maks and the use of IoC?
I have a slight idea of what you're talking, but to concrete ;-)
Thanks.
Yes, I started off and still am in the project as a one man team, it
started off as a project which had to be finished very swiftly and
will be dumped once a bigger system goes online, more details is NDA...
I knew xdoclet in the past from an old job where I constantly had to
fight against monetary issues, and had in the end to do the work of an
entire team.
What I did was to use xdoclet sort of as a code templating wizard, which
generated the create update delete base code and the master detail views
from the given reverse engineered database objects...
All I did was to extend it that way, that I had to add basic metadata
with form information to the database pojos and then had a run via
xdoclet over them. The result is basically a master detail module with
all the forms, some basic verification code and the dao layer, and it is
working and also with working faces-config files which were generated.
Several form parts are split apart for easier maintenance via aliasbean
includes... or general includes
No to overwrite my code again and again I used basic inheritance to add
manually the additional functionality to the java parts, nowadays if I
had to write it from scratch I probably would weave the objects into the
rest of the system via inversion of object control.
the final forms were based upon the code templates generated but
manually altered and moved into separate directories, the binding could
then be done by altering the faces-config manually...
So what happened is that you basically generate a basic application out
of an existing db schema and then start to alter the parts you need
changed and move them out of the generation base, so that you do not
overwrite them. That also means, you need at least one working project
codebase to start on to write your templates for the next project.
Once this huge task is done and the codebase is stabilized you can reuse
it for the next projects...
one of the generation classes for xdoclet looks like this:
/**
* @dbo.form.single module=gen icon=img_institution_big
title=Institutionsverwaltung
* @dbo.binding.hibernate A simple changelog blog object which handles the
*change logs and infos of the system
* @author Punz
*
* PRE
*
* Dummy class to generate the database forms
*
* currently following tags are supported dbo.form.single marks the
class as dbo
* master object on a single master detail form dbo.method mars a
method which
* has to be parsed as dbo method (only getters have to be marked it has
* following attributes: header marks a plain text header or a ref to an
* internationalization file sortable if set marks this property as a sort
* criterion masterDisplay marks this one as displayable in the master
table
* detailDisplay marks this one as displayable in the detail table as well
* detailField gives the jsf detail field type detailFieldParams pushes the
* internal detail field params down to the template
*
* @dbo.method.validation marks that validation has to be added
*required=true/false marks that the required
flag has
*to be set stdvalidators= f:validateLength
*minimum='2' maximum='40' / a string of standard
*validators
*
* @dbo.action sets an action with following parameters
oneonmany=true marks
* the action as simply two form oneonmany relations
* header=Kontakte linkheader for the action
masterDisplay=true
* display the action in the master display
detailDisplay=true
* display the action in the detail display as well
* slave=Tblcontact slave object in case of a simple one
on many
*
* /pre
*/
public class Institution extends ommiddlegen.Institution {
/**
* @see ommiddlegen.AbstractDiffsyschangelog#getId()
* @dbo.method header=Id sortable=true masterDisplay=true
detailDisplay=true detailField=h:inputHidden
detailFieldType=h:inputHidden
*/
public Integer getId() {
return super.getId();
}
/**
* @see ommiddlegen.AbstractDiffsyschangelog#getTitle()
* @dbo.method header=Name masterDisplay=true
detailDisplay=true
* @dbo.method.validation required=true
stdvalidators=f:validateLength minimum='2' maximum='50' /
* @dbo.method.search likeQuery=true
*/
public String getNachname() {
return super.getNachname();
}
/**
* @see ommiddlegen.AbstractDiffsyschangelog#getDescription()
* @dbo.method header=Beschreibung detailDisplay=true
detailField=h:inputTextarea rows='10'
Re: master detail pages
getRowData() will work too. But if the data changes between the requests it could be possible that getRowData() returns the wrong object. Using a parameter with a commandlink which identifies the selected object would be safer. Regards, Mathias Enrique Medina schrieb: Just a question... Why do you need a parameter to the commandlink? Wouldn't it be sufficient to have the datatable in your backing bean and simply call getRowData()? 2005/8/31, Jesse Alexander (KBSA 21) [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]: -Original Message- I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial. I read a lot of tutorials on page navigation and event handling... but I still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed bean but I can implement the passage to the detailed page? -/Original Message- Have you checked the tutorials at: http://www.jsftutorials.net/? Basically you add a command-link as a child to a column and pass it some identifying attribute of the current row-object as a parameter. hth Alexander Else join us on the IRC-channel (search the mailing-list archives for the coordinates)...
cannot use AddResource class to add my own resources
Hi!
I wrote a new component based on MyFaces, and this component
has an external JS resource. While rendering, I want to add the reference of
this resource by the AddResource class: I tried simply to call AddResource.addJavaScriptToHeader(...).
But unfortunately this function can handle only the resources of the MyFaces
components, because of the line 203:
if( ! name.startsWith(COMPONENTS_PACKAGE) ){
log.error(
If I write my own AddResource class (functions like yours),
the ExtensionsFilter still references the old AddReource class (between lines 106
and 132), so I need to implement a new ExtensionFilter to handle my resources
well.
This solution of my problem works, but I won't use it. I
need a more structured solution. What shall I do to use the original AddResource
class? And what are these security reasons, why the restriction
to the package name is required?
Thanks,
Csaba
Re: cannot use AddResource class to add my own resources
I believe this need not be checked for, right.
Open a jira issue on this, and assign Sylvain Vieujot to the issue -
he is the original author of the ExtensionFilter.
regards,
Martin
On 8/31/05, Sebestyén Csaba [EMAIL PROTECTED] wrote:
Hi!
I wrote a new component based on MyFaces, and this component has an external
JS resource. While rendering, I want to add the reference of this resource
by the AddResource class: I tried simply to call
AddResource.addJavaScriptToHeader(...). But unfortunately
this function can handle only the resources of the MyFaces components,
because of the line 203:
if( ! name.startsWith(COMPONENTS_PACKAGE) ){ log.error(
If I write my own AddResource class (functions like yours), the
ExtensionsFilter still references the old AddReource class (between lines
106 and 132), so I need to implement a new ExtensionFilter to handle my
resources well.
This solution of my problem works, but I won't use it. I need a more
structured solution. What shall I do to use the original AddResource class?
And what are these „security reasons, why the restriction to the package
name is required?
Thanks,
Csaba
--
http://www.irian.at
Your JSF powerhouse -
JSF Trainings in English and German
Re: master detail pages
Hi Mathias, What about using getRowData() and then calling your service level to refresh the object? If it has recently changed, it would be in cache, so no hits to the DB are needed... because with the solution of the hidden parameter it is also necessary to retrieve the object in every request, isn't it? Once I heard that the use of hidden fields breaks security in the sense that you are giving everyone the possibility to know the PK of your data. What do you think about it? Thanks.2005/8/31, Mathias Broekelmann [EMAIL PROTECTED]: getRowData() will work too. But if the data changes between the requestsit could be possible that getRowData() returns the wrong object. Using aparameter with a commandlink which identifies the selected object would be safer.Regards,MathiasEnrique Medina schrieb: Just a question... Why do you need a parameter to the commandlink? Wouldn't it be sufficient to have the datatable in your backing bean and simply call getRowData()? 2005/8/31, Jesse Alexander (KBSA 21) [EMAIL PROTECTED] mailto: [EMAIL PROTECTED]: -Original Message- I'm a JSF total newbbie so.. I'm sorry if I'm asking something trivial. I read a lot of tutorials on page navigation and event handling... but I still can't figure out how to implement a simple master/detail pages. I make a page with dataTable reading values from a managed bean but I can implement the passage to the detailed page? -/Original Message- Have you checked the tutorials at: http://www.jsftutorials.net/? Basically you add a command-link as a child to a column and pass it some identifying attribute of the current row-object as a parameter. hth Alexander Else join us on the IRC-channel (search the mailing-list archives for the coordinates)...
MyFaces - navigation problem while extending jsp page in tiles.xml
Hello everybody...
I've created simple form with two input fields and one submit button
on jsp page.
test.jsp
!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN
http://www.w3.org/TR/html4/loose.dtd;
%@ page contentType=text/html;charset=windows-1257%
%@ taglib uri=http://java.sun.com/jsf/core; prefix=f%
%@ taglib uri=http://java.sun.com/jsf/html; prefix=h%
jsp:useBean id=backing_test class=mypackage.beans.backing.Test
scope=request /
%--= backing_test.action()--%
html
head
meta http-equiv=Content-Type content=text/html;
charset=windows-1257/meta
title
test
/title
/head
body
f:view
h:form binding=#{backing_test.form1}
Riigi id: h:inputText value=#{backing_test.id}/
Kood: h:inputText value=#{backing_test.kood}/
h:commandLink action=#{backing_test.goFilter} value=action /
h:commandButton value=push me action=#{backing_test.goFilter}
binding=#{backing_test.commandButton1}/
/h:form
/f:view
/body
/html
I've added such code to faces-config.xml
navigation-rule
from-view-id/test.jsp/from-view-id
navigation-case
from-outcomesuccess/from-outcome
to-view-id/filtered.jsp/to-view-id
/navigation-case
/navigation-rule
And that's piece of code ofTest.java bean I use to get to another page:
public String goFilter()
{
System.out.println(came to action);
// Add event code here...
return success;
}
Till now everything goes fine, user is redirected to filter.jsp page
after clicking button.
Now attention please:
As soon as I add such a code to my tiles.xml, my button stops working :(
I even don't get came to action message :(
definition name=/test.tiles extends=layout
put name=body value=/test.jsp/
/definition
Here layout defines basic page, with standard information on it
(banners, menus, etc).
I don't understand - how to heal such code... Is it possible to heal
it without printing each page's layout manually?
WG: best way to initialize BackingBean?
Hello! Is there another way without using an addon-framework to initialize a backing-bean (without constructor intialization, managed-properties)? Stefan Gesigora -Ursprüngliche Nachricht- Von: Stefan Gesigora Gesendet: Mittwoch, 31. August 2005 11:21 An: MyFaces Discussion Betreff: AW: best way to initialize BackingBean? Hi! Thx Martin! How can I integrate Shale into JSF (Sun RI)? Is there a tutorial about this? Stefan Gesigora -Ursprüngliche Nachricht- Von: Martin Marinschek [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 31. August 2005 11:13 An: MyFaces Discussion Betreff: Re: best way to initialize BackingBean? You might use Shale to do this kind of things. With Shale, if your beans implement a special interface, several methods will be called on your bean - one of them before the view is shown... regards, Martin On 8/31/05, Stefan Gesigora [EMAIL PROTECTED] wrote: Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I can't use the constructor initialization cause I need it everytime not only the first time. I can't use initialization via managed-property cause the data isn't static... Any suggestions? Thx Stefan Gesigora -- http://www.irian.at Your JSF powerhouse - JSF Trainings in English and German
Re: JSF + Spring + Hibernate
Martin Marinschek wrote: A very short hint from my side: that exception means this object is not in the session anymore. You can easily reapply it to the session by calling session.update(object) update is sort of problematic unless you really want to write unless you do transactioning... the better option would be to prefetch the affected parts so that you do not run into lazy loading issues over session boundaries. To my experience, the OpenSessionInViewFilter, covers most problems in these areas anyway because usually you only need the data you show or at least reference in one form, in the next one, and fore the few cases you do not need, a lazy false or object reload or bind does it. the spring OpenSessionInViewFilterfilter has another nice sideeffect it forces you to use dedicated transactions if you want to write, otherwise it refuses to write.
tree table
i tried to use the tree table components and all is OK but i have a lot of data and i need some sort of paging like a data table. Is there any way to obtain this behaviour ? Thanks for any answer
RE: best way to initialize BackingBean?
I didnt see your full message earlier. Along with Injection service, you should define the scope as request. And data retrieval logic keep it in another Backed bean which is defined before this bean store it in session. Regards Murali From: Murali [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 31, 2005 7:20 AM To: 'MyFaces Discussion' Subject: RE: best way to initialize BackingBean? You can use injections service available in JSF. The attributes of Backed bean can be initialized part of definition using other Backedbean properties. It is a great feature. The class code looks neat, as no initialization code, also it is easy to modify initialization code , which is part of Backed bean definition. Regards Murali 248.766.9009 (Cell) This e-mail message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information belonging to ECON LLC. Any unauthorized review, use, copying, disclosure or distribution of this message is strictly prohibited. If you are not an intended recipient of this message, please contact the sender by reply e-mail and destroy all soft and hard copies of the message and any attachments From: Stefan Gesigora [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 31, 2005 7:00 AM To: MyFaces Discussion Subject: AW: best way to initialize BackingBean? I use this kind of bean. But I have to initialize it dynamically. Like the initialization of a Form class in an action class in struts. Von: Guy Katz [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 31. August 2005 12:54 An: MyFaces Discussion Betreff: RE: best way to initialize BackingBean? why not useuse a request scope bean and bind it to the JSP you talk about? -Original Message- From: Stefan Gesigora [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 31, 2005 11:54 AM To: MyFaces Discussion Subject: best way to initialize BackingBean? Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I cant use the constructor initialization cause I need it everytime not only the first time. I cant use initialization via managed-property cause the data isnt static Any suggestions? Thx Stefan Gesigora
Antwort: imageLocation
Yes, it should be fixed in the nightly build.
Re: JSF + Spring + Hibernate
Thank you Turgay The solution unfortunately does not work for me. Maybe I do something stupid. So I have to read through all the other replies and try to understand ... Regards ... Rick Onsdag 31 august 2005 12:18 skrev Turgay Zengin: Sorry, I forgot the filter mapping part. You should also add this to web.xml: filter-mapping filter-namehibernateFilter/filter-name url-pattern*.do/url-pattern /filter-mapping Just replace the url-pattern with the correct pattern you use for JSF (*.jsf for example) -Turgay On 8/31/05, Turgay Zengin [EMAIL PROTECTED] wrote: Did you try the OpenSessionInViewFilter? In web.xml, define this filter: filter filter-namehibernateFilter/filter-name filter-classorg.springframework.orm.hibernate.support.OpenSessionInView Filter/filter-class /filter I have not tried this with MyFaces yet, but with Struts this worked for me. HTH, Turgay.
Re: best way to initialize BackingBean?
I'm new to JSF, so maybe this isn't best way. But couldn't you do that fromthe action that sends you to the page you want to initialize. Have your action mapped to the method you want to use as initilization method, then forward to the page. On 8/31/05, Stefan Gesigora [EMAIL PROTECTED] wrote: Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I can't use the constructor initialization cause I need it everytime not only the first time. I can't use initialization via managed-property cause the data isn't static… Any suggestions? Thx Stefan Gesigora
RE: Tree2 Questions
I agree with it being part of the model, however I feel (and I've seen it in other posts) that the tree should throw NodeExpansionEvents when the navigation controls are clicked. This way I could implement my lazy loading in my listener for those events. It would save developers the hassle of using there own navigation images to accomplish this task. Bryan From: Enrique Medina [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 31, 2005 3:19 AMTo: MyFaces DiscussionCc: Dunbar, BryanSubject: Re: Tree2 Questions Hi Bryan,IMHO, the lazy loading mechanism is not responsibility of the tree2 itself, but of the treemodel that provides the data to the tree2, so you can provide your own implementation using, for example, Hibernate or OJB. 2005/8/30, Sean Schofield [EMAIL PROTECTED]: Please send tree2 questions to the mailing list so all users canbenefit from the answers.Also, there are many more users on the listwho can help you and the component authors do not have time to answerall of the questions individually. Regards,sean-- Forwarded message --From: Dunbar, Bryan [EMAIL PROTECTED]Date: Aug 30, 2005 11:22 AMSubject: Tree2 Questions To: [EMAIL PROTECTED]Sean - Do you have a good way to implement Lazy loading via tree2?This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) namedabove. If you receive this e-mail in error, please do not read, copyor disseminate it in any manner. If you are not the intendedrecipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to themessage immediately by informing the sender that the message wasmisdirected. After replying, please erase it from your computersystem. Your assistance in correcting this error is appreciated. This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) named above. If you receive this e-mail in error, please do not read, copy or disseminate it in any manner. If you are not the intended recipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please erase it from your computer system. Your assistance in correcting this error is appreciated.
Re: JSF success story
this is a project on: sourceforge.net were people who want to drop jsf code can do it - without having to go through the rigorous ASF screening necessary ;) depending on license issues, users base etc. some of this code might wander over to MyFaces core at some point in time. regards, Martin On 8/31/05, Dave Brondsema [EMAIL PROTECTED] wrote: Werner Punz wrote: Martin Manfred and the others from vienna, know already the app, I showed an early beta version to them in Vienna, I could not show it publicly due to various reasons But just for the general public here is a small success story, I did a JSF app, around the timeframe of the 15th of may til the 15th of june (core crunch phase with some maintainance until now) most of the controls currently hosted on jsf-comp were developed for that program due to the insane specs I got in last minute, which I could not get rid of. What and where is jsf-comp? -- Dave Brondsema Software Developer Cornerstone University -- http://www.irian.at Your JSF powerhouse - JSF Trainings in English and German
Re: JSF + Spring + Hibernate
Rick Gruber-Riemer wrote:
Hej
I use MyFaces (1.0.9), Hibernate (3.0.5) and Spring (1.22) in my
webapplication. When I get a list of records from the database in a table or
make a new record using a form everything works fine. However when I try to
edit a record in a form, I get a org.hibernate.LazyInitializationException
error on opening the editform.
I understand this has something to do with the Hibernate sessions. And it has
nothing to do with MyFaces in particular. And I have found some hints by
googeling like Spring's OpenSessionInViewFilter. However I do not have a clue
what to change where in the configuration.
= Has somebody used JSF+Spring+Hibernate successfully?
= Downloadable sample code?
= Do I need the jsf-spring integration library?
Any hint would be much appreciated ... Rick
I'm using Hibernate 3.1 annotations, but I'm sure you can do this
without annotation syntax. The code that follows is a Menu object
with a unique key by date.
My DTO object is annotated like this:
@Table(name = tblFoodServiceMenu)
@org.hibernate.annotations.Proxy(lazy = false)
public class Menu implements Serializable {
...
I don't use OpenSessionInViewFilter
The DTOs are loaded with this DAO class:
public class MenuDAO extends HibernateDaoSupport {
private final Log log = LogFactory.getLog(getClass().getName());
public Menu getMenu(Date date) {
log.trace(creating object for key: + date);
try {
return (Menu) getHibernateTemplate().load(Menu.class,
date);
} catch (DataAccessException e) {
log.debug(detected that no object found);
return null;
}
}
public void saveMenu(Menu menu) {
log.trace(saving object with key: + menu.date);
getHibernateTemplate().saveOrUpdate(menu);
}
}
applicationContext.xml has:
bean id=dataSource ...
/bean
!-- Hibernate SessionFactory Definition --
bean id=sessionFactory
class=org.springframework.orm.hibernate3.LocalSessionFactoryBean
property name=configLocation
value/WEB-INF/classes/hibernate.cfg.xml/value
/property
property name=configurationClass
valueorg.hibernate.cfg.AnnotationConfiguration/value
/property
property name=dataSource
ref bean=dataSource/
/property
/bean
!-- Spring Data Access Exception Translator Defintion --
bean id=jdbcExceptionTranslator
class=org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator
property name=dataSourceref bean=dataSource//property
/bean
!-- Hibernate Template Defintion --
bean id=hibernateTemplate
class=org.springframework.orm.hibernate3.HibernateTemplate
property name=sessionFactoryref bean=sessionFactory//property
property name=jdbcExceptionTranslatorref
bean=jdbcExceptionTranslator//property
/bean
!-- User DAO object: Hibernate implementation --
bean id=menuDao class=my.package.model.MenuDAO
property name=hibernateTemplateref
bean=hibernateTemplate//property
/bean
And the Menu backing bean has a managed property which points to a
service locator class (that class connects to the spring container, but
I intend to switch to the jsf-spring library soon). Then in the
backing bean it has this method which loads a Menu:
public void setDate(Date date) {
if (date != null) {
this.date = date;
menu = menuDao.getMenu(date);
if (menu == null) {
menu = new Menu();
menu.setDate(date);
}
} else {
log.debug(ignoring setDate(null));
}
}
Hope that helps! Took me a while to figure out
--
Dave Brondsema
Software Developer
Cornerstone University
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Description: OpenPGP digital signature
Re: JSF + Spring + Hibernate
But Dave, you are not using lazy loading, are you?
The big problems appear when using lazy loading and objects are not initialized in the same Hibernate session...
2005/8/31, Dave Brondsema [EMAIL PROTECTED]:
Rick Gruber-Riemer wrote: Hej
I use MyFaces (1.0.9), Hibernate (3.0.5) and Spring (1.22) in my
webapplication. When I get a list of records from the database in a
table or make a new record using a form everything works fine. However
when I try to edit a record in a form, I get a
org.hibernate.LazyInitializationException error on opening the editform.
I understand this has something to do with the Hibernate sessions. And
it has nothing to do with MyFaces in particular. And I have found some
hints by googeling like Spring's OpenSessionInViewFilter. However I do
not have a clue what to change where in the configuration. = Has somebody used JSF+Spring+Hibernate successfully? = Downloadable sample code? = Do I need the jsf-spring integration library?
Any hint would be much appreciated ... RickI'm using Hibernate 3.1 annotations, but I'm sure you can do thiswithout annotation syntax.The code that follows is a Menu object
with a unique key by date.My DTO object is annotated like this:@Table(name = tblFoodServiceMenu)@org.hibernate.annotations.Proxy(lazy = false)public class Menu implements Serializable {
...I don't use OpenSessionInViewFilterThe DTOs are loaded with this DAO class:public class MenuDAO extends HibernateDaoSupport {private final Log log = LogFactory.getLog(getClass().getName());
public Menu getMenu(Date date) {log.trace(creating
object for key: + date);try {return
(Menu) getHibernateTemplate().load(Menu.class, date);}
catch (DataAccessException e) {log.debug(detected
that no object found);return
null;}}public void saveMenu(Menu menu) {log.trace(saving
object with key: + menu.date);getHibernateTemplate().saveOrUpdate(menu);}}applicationContext.xml has:bean id=dataSource .../bean
!-- Hibernate SessionFactory Definition --bean id=sessionFactoryclass=org.springframework.orm.hibernate3.LocalSessionFactoryBeanproperty name=configLocation
value/WEB-INF/classes/hibernate.cfg.xml/value/propertyproperty name=configurationClassvalueorg.hibernate.cfg.AnnotationConfiguration
/value/propertyproperty name=dataSourceref bean=dataSource//property/bean!-- Spring Data Access Exception Translator Defintion --
bean id=jdbcExceptionTranslatorclass=org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslatorproperty name=dataSourceref bean=dataSource//property
/bean!-- Hibernate Template Defintion --bean id=hibernateTemplateclass=org.springframework.orm.hibernate3.HibernateTemplateproperty name=sessionFactoryref bean=sessionFactory//property
property name=jdbcExceptionTranslatorrefbean=jdbcExceptionTranslator//property/bean!-- User DAO object: Hibernate implementation --
bean id=menuDao class=my.package.model.MenuDAOproperty name=hibernateTemplaterefbean=hibernateTemplate//property/bean
And the Menu backing bean has a managed property which points to aservice locator class (that class connects to the spring container, butI intend to switch to the jsf-spring library soon). Then in the
backing bean it has this method which loads a Menu:public void setDate(Date date) {if (date != null) {this.date
= date;menu
= menuDao.getMenu(date);if
(menu == null) {menu
= new Menu();menu.setDate(date);}} else {log.debug(ignoring
setDate(null));}}Hope that helps!Took me a while to figure out--Dave BrondsemaSoftware DeveloperCornerstone University
Re: best way to initialize BackingBean?
I'm using Shale for this. This is one of the specific things that Shale is designed to give you. And yes, you can use with either the RI or MyFaces (basically any JSF implementation.) I use it with MyFaces of course ;-) There is a nice overview on the Struts website now (http://struts.apache.org/shale.) Check out the javadocs as well since there is some good summary documentation in there as well. sean On 8/31/05, Jeff Cooper [EMAIL PROTECTED] wrote: I'm new to JSF, so maybe this isn't best way. But couldn't you do that from the action that sends you to the page you want to initialize. Have your action mapped to the method you want to use as initilization method, then forward to the page. On 8/31/05, Stefan Gesigora [EMAIL PROTECTED] wrote: Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I can't use the constructor initialization cause I need it everytime not only the first time. I can't use initialization via managed-property cause the data isn't static… Any suggestions? Thx Stefan Gesigora
Re: JSF + Spring + Hibernate
I don't see it in your fragment of the JSP code, but I guess you have
an EL accessing your lazy loaded variable inside your links object,
haven't you?
That is the precise moment where the error should appear, as all the
list has been created using a different Hibernate session from the one
you are now in this request ;-)
2005/8/31, Rick Gruber-Riemer [EMAIL PROTECTED]:
Hej MartinThe thing is, that this object does not even exist. At least not if Iunderstand the meaning of a request the right way.What I do is:# A DAO extending HibernateDaoSupport finds all records or a record with a
specifc id (ScanJourLinkHbmDAO)# The Page-objects get records or a record by means of a (shared)manager-class, which has a pointer to the DAO# Then in danafileResultPage.jsf I have a table, which shows all records based
on DanafileResultPage.java getting the records from the database via managerand DAO# Each row in the table contains links to edit a record in a new page(danafileScanJourModifyPage.jsf). The Page object for the new page
(DanafileScanJourModifyPage.java) has a property (idLink) which I access viaa MyFaces t:updateActionListener tag. Then in setIdLink(String anId) I tryto get the record from the database by means of the manager, which then calls
the DAO ...= I have no pointer to the object in either the Page, manager or DAO class.So I cannot call session.update(object) :-( And I guess that the call to anew page is a new request.Am I doing something wrong?
Regards ... Rickt:dataTableid=scanJourLinksTablestyleClass=standardTablecolumnClasses=list-column-leftheaderClass=list-header-left
rowClasses=list-row-even, list-row-oddvalue=#{DanafileResultPage.scanJourLinks}var=linksh:columnf:facet name=header
h:outputText
value=//f:faceth:commandLink
action="" immediate=trueh:outputText
value=#{msg.edit} /t:updateActionListener
property=#{DanafileScanJourModifyPage.idLink}value=#{links.id} //h:commandLink/h:columnpublic class DanafileScanJourModifyPage extends Page {
public void setIdLink(String anId) {if (logger.isDebugEnabled()) {logger.debug(getting
link with id= + anId);}link
= danafileManager.findScanJourLink(Long.valueOf(anId));setUpdating(true);} //public void setId(String)public class DanafileManager {public ScanJourLink findScanJourLink(Long id) {
return
scanJourLinkDAO.findScanJourLink(id);} //END public ScanJourLink findScanJourLink(Long)public class ScanJourLinkHbmDAO extends HibernateDaoSupport implementsIScanJourLinkDAO {//implements IScanJourLinkDAO
public ScanJourLink findScanJourLink(Long id) {ScanJourLink
link = (ScanJourLink)getHibernateTemplate().load(ScanJourLink.class, id);if (null == link) {throw
new ObjectRetrievalFailureException(ScanJourLink.class, id);}return link;}Onsdag 31 august 2005 12:26 skrev Martin Marinschek: A very short hint from my side:
that exception means this object is not in the session anymore. You can easily reapply it to the session by calling session.update(object) If you are sure that your object has not changed since it was last in
the session, you can call: session.lock(object, LockMode.NONE); regards, Martin On 8/31/05, Werner Punz [EMAIL PROTECTED]
wrote: I think before giving a short answer... I will give you a detailed explanation via a links:
http://wiki.apache.org/myfaces/HibernateAndMyFaces?highlight=%28hibernate %29 This small article describes exactly the problems you run into and how to solve them...
Werner Rick Gruber-Riemer wrote: Hej I use MyFaces (1.0.9), Hibernate (3.0.5) and Spring (1.22) in my webapplication. When I get a list of records from the database in a
table or make a new record using a form everything works fine. However when I try to edit a record in a form, I get a org.hibernate.LazyInitializationException error on opening the
editform. I understand this has something to do with the Hibernate sessions. And it has nothing to do with MyFaces in particular. And I have found some hints by googeling like Spring's
OpenSessionInViewFilter. However I do not have a clue what to change where in the configuration. = Has somebody used JSF+Spring+Hibernate successfully?
= Downloadable sample code? = Do I need the jsf-spring integration library? Any hint would be much appreciated ... Rick
hibernate-mapping class name=dk.trafikstyrelsen.data.transfer.dto.railsecurity.danafile.ScanJo urLink table=DANAFILE.SCANJOUR_LINK
id name=id type=long column=ROW_ID
meta attribute=scope-setprotected/meta
generator class=sequence
param name=sequenceDANAFILE.SEQNUMBER/param /generator /id
version column=REVISION name=revision /
property name=objId type=string not-null=true/
property name=scanJourNumber type=int column=SCANJOUR_NUMBER not-null=true/ property name=notes type=string column=NOTES not-null=false/ property name=active
type=yes_no column=ACTIVE not-null=true / property name=createdBy type=string column=CREATED_BY not-null=true/
property name=lastUpdatedBy type=string
Re: best way to initialize BackingBean?
I really can recomment, to add the spring JSF integration library to the entire mix of libs in the project, you get many benefits by using spring IOC, like integrated AOP mechanisms... Werner Enrique Medina wrote: At the moment, the IoC provided by JSF is only about objects and properties, I'm afraid. You'll have to use Spring or another advance IoC container for constructor dependency injection, etc. 2005/8/31, Stefan Gesigora [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]: Hello! Is there another way without using an addon-framework to initialize a backing-bean (without constructor intialization, managed-properties)? Stefan Gesigora -Ursprüngliche Nachricht- Von: Stefan Gesigora Gesendet: Mittwoch, 31. August 2005 11:21 An: MyFaces Discussion Betreff: AW: best way to initialize BackingBean? Hi! Thx Martin! How can I integrate Shale into JSF (Sun RI)? Is there a tutorial about this? Stefan Gesigora -Ursprüngliche Nachricht- Von: Martin Marinschek [mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 31. August 2005 11:13 An: MyFaces Discussion Betreff: Re: best way to initialize BackingBean? You might use Shale to do this kind of things. With Shale, if your beans implement a special interface, several methods will be called on your bean - one of them before the view is shown... regards, Martin On 8/31/05, Stefan Gesigora [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I can't use the constructor initialization cause I need it everytime not only the first time. I can't use initialization via managed-property cause the data isn't static... Any suggestions? Thx Stefan Gesigora -- http://www.irian.at Your JSF powerhouse - JSF Trainings in English and German
Re: JSF + Spring + Hibernate
You are right, I access the variable just in the same table in the next
column.
It seems to me, that I just have to get rid of all this lazy-stuff. Right now
I do not care whether this gives me some resourceproblems.
How and where can I specify, that I want a session per database request?
Regards ... Rick
t:dataTable
id=scanJourLinksTable
styleClass=standardTable
columnClasses=list-column-left
headerClass=list-header-left
rowClasses=list-row-even, list-row-odd
value=#{DanafileResultPage.scanJourLinks}
var=links
h:column
f:facet name=header
h:outputText value=/
/f:facet
h:commandLink action=edit_link
immediate=true
h:outputText
value=#{msg.edit} /
t:updateActionListener
property=#{DanafileScanJourModifyPage.idLink}
value=#{links.id} /
/h:commandLink
/h:column
h:column
f:facet name=header
h:outputText
value=#{msg.scanJourNumberLabel}/
/f:facet
h:outputText
value=#{links.scanJourNumber}/
/h:column
h:column
f:facet name=header
h:outputText
value=#{msg.notesLabel}/
/f:facet
t:popup styleClass=popup
closePopupOnExitingElement=true closePopupOnExitingPopup=true
displayAtDistanceX=10 displayAtDistanceY=10
h:outputText value=#{links.notes} /
f:facet name=popup
h:panelGroup
h:panelGrid columns=1
h:outputText value=#{links.notes}/
/h:panelGrid
/h:panelGroup
/f:facet
/t:popup
/h:column
/t:dataTable
h:form
t:commandButton
id=saveBtn
tabindex=4
value=#{msg.buttonAdd}
action=add_link
forceId=true
styleClass=button
immediate=true
t:updateActionListener
property=#{DanafileScanJourModifyPage.objIdLink}
value=#{DanafileResultPage.caseDocument.objId} /
/t:commandButton
/h:form
Onsdag 31 august 2005 14:38 skrev Enrique Medina:
I don't see it in your fragment of the JSP code, but I guess you have an EL
accessing your lazy loaded variable inside your links object, haven't
you?
That is the precise moment where the error should appear, as all the list
has been created using a different Hibernate session from the one you are
now in this request ;-)
2005/8/31, Rick Gruber-Riemer [EMAIL PROTECTED]:
Hej Martin
The thing is, that this object does not even exist. At least not if I
understand the meaning of a request the right way.
What I do is:
# A DAO extending HibernateDaoSupport finds all records or a record with
a specifc id (ScanJourLinkHbmDAO)
# The Page-objects get records or a record by means of a (shared)
manager-class, which has a pointer to the DAO
# Then in danafileResultPage.jsf I have a table, which shows all records
based
on DanafileResultPage.java getting the records from the database via
manager
and DAO
# Each row in the table contains links to edit a record in a new page
(danafileScanJourModifyPage.jsf). The Page object for the new page
(DanafileScanJourModifyPage.java) has a property (idLink) which I access
via
a MyFaces t:updateActionListener tag. Then in setIdLink(String anId) I
try
to get the record from the database by means of the manager, which then
calls
the DAO ...
= I have no pointer to the object in either the Page, manager or DAO
class.
Re: ajax ajax ajax
Hi Balaji, I have just downloaded Firefox 1.0.6 and still doesn't work for me... Could you please post a quick step-by-step guide of your configuration? Thanks.2005/8/31, Balaji Kalyansundaram [EMAIL PROTECTED]: It works in Firefox 1.0.6 -Original Message-From: Enrique Medina [mailto:[EMAIL PROTECTED]]Sent: Tuesday, 30 August 2005 8:48 PMTo: MyFaces DiscussionSubject: Re: ajax ajax ajaxAlso is not working for me in Firefox 1.0 :-(Error: [Exception... Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIXMLHttpRequest.getResponseHe ader] nsresult: 0x80040111 (NS_ERROR_NOT_AVAILABLE) location: JS frame :: http://localhost:8080/DeltaR/faces/myFacesExtensionResource/ajax.UIAjaxViewComponent/11245933/JSFAJAX.js :: anonymous :: line 48 data: no]Source File: http://localhost:8080/DeltaR/faces/myFacesExtensionResource/ajax.UIAjaxViewComponent/11245933/JSFAJAX.js Line: 48where the source line is: var idsFromResponse = req.getResponseHeader(Ajax-Update-Ids); 2005/8/30, Arash Bijanzadeh [EMAIL PROTECTED]: On 8/15/05, Werner Punz [EMAIL PROTECTED] wrote: Just checked the wiki again, some russian guy postedlinks to his projectthat stuff looks really interestinghttp://wiki.apache.org/myfaces/AJAX_Framework It is not working on mozilla 1.7.8 with error message AJAX not found!-- from debian manifesto:Debian Linux is a brand-new kind of Linux distribution. Rather than being developed by one isolated individua l or group, as other distributions of Linux have been developed in thepast, Debian is being developed openly in the spirit of Linux and GNU. This correspondence is for the named persons only. It may contain confidential or privileged information or both. No confidentiality or privilege is waived or lost by any mis transmission. If you receive this correspondence in error please delete it from your system immediately and notify the sender. You must not disclose, copy or relay on any part of this correspondence, if you are not the intended recipient. Any opinions expressed in this message are those of the individual sender except where the sender expressly, and with the authority, states them to be the opinions of the Department of Emergency Services, Queensland.
RE: JSF success story
-Original Message- What and where is jsf-comp? -/Original Message- https://sourceforge.net/projects/jsf-comp/ current active components: - optional validator - tabbed pane memory idea: - easy accessible repository for code around JSF - access for everyone willing to contribute - all licensing must be Apache license v2 to allow for easy migration to myfaces hth Alexander
Re: best way to initialize BackingBean?
Sean, Have you a good tuto on Shale ? 2005/8/31, Sean Schofield [EMAIL PROTECTED]: Yes but really you should look at Shale. It provides a simple *standard* way to do this. Take the time to learn this aspect of Shale. You won't regret it. sean On 8/31/05, hicham abassi [EMAIL PROTECTED] wrote: Is it possible to do that with a PhaseListener ? http://www.jsfcentral.com/redirect?listingTitle=JSF%20PhaseListener%20-%20Is%20This%20User%20Logged%20In?categoryTitle=Articles%20and%20BookscategoryPath=readingsite=http://groups.yahoo.com/group/jsf-developers/message/471 I have to do the same thing than Stephan 2005/8/31, Werner Punz [EMAIL PROTECTED]: I really can recomment, to add the spring JSF integration library to the entire mix of libs in the project, you get many benefits by using spring IOC, like integrated AOP mechanisms... Werner Enrique Medina wrote: At the moment, the IoC provided by JSF is only about objects and properties, I'm afraid. You'll have to use Spring or another advance IoC container for constructor dependency injection, etc. 2005/8/31, Stefan Gesigora [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]: Hello! Is there another way without using an addon-framework to initialize a backing-bean (without constructor intialization, managed-properties)? Stefan Gesigora -Ursprüngliche Nachricht- Von: Stefan Gesigora Gesendet: Mittwoch, 31. August 2005 11:21 An: MyFaces Discussion Betreff: AW: best way to initialize BackingBean? Hi! Thx Martin! How can I integrate Shale into JSF (Sun RI)? Is there a tutorial about this? Stefan Gesigora -Ursprüngliche Nachricht- Von: Martin Marinschek [mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 31. August 2005 11:13 An: MyFaces Discussion Betreff: Re: best way to initialize BackingBean? You might use Shale to do this kind of things. With Shale, if your beans implement a special interface, several methods will be called on your bean - one of them before the view is shown... regards, Martin On 8/31/05, Stefan Gesigora [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I can't use the constructor initialization cause I need it everytime not only the first time. I can't use initialization via managed-property cause the data isn't static... Any suggestions? Thx Stefan Gesigora -- http://www.irian.at Your JSF powerhouse - JSF Trainings in English and German -- hicham ABASSI [EMAIL PROTECTED] -- hicham ABASSI [EMAIL PROTECTED]
Re: best way to initialize BackingBean?
Nope. Just check the link from earlier in the thread. There are nightly builds and simple examples as well so you should be able to get up to speed pretty quickly. sean On 8/31/05, hicham abassi [EMAIL PROTECTED] wrote: Sean, Have you a good tuto on Shale ? 2005/8/31, Sean Schofield [EMAIL PROTECTED]: Yes but really you should look at Shale. It provides a simple *standard* way to do this. Take the time to learn this aspect of Shale. You won't regret it. sean On 8/31/05, hicham abassi [EMAIL PROTECTED] wrote: Is it possible to do that with a PhaseListener ? http://www.jsfcentral.com/redirect?listingTitle=JSF%20PhaseListener%20-%20Is%20This%20User%20Logged%20In?categoryTitle=Articles%20and%20BookscategoryPath=readingsite=http://groups.yahoo.com/group/jsf-developers/message/471 I have to do the same thing than Stephan 2005/8/31, Werner Punz [EMAIL PROTECTED]: I really can recomment, to add the spring JSF integration library to the entire mix of libs in the project, you get many benefits by using spring IOC, like integrated AOP mechanisms... Werner Enrique Medina wrote: At the moment, the IoC provided by JSF is only about objects and properties, I'm afraid. You'll have to use Spring or another advance IoC container for constructor dependency injection, etc. 2005/8/31, Stefan Gesigora [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]: Hello! Is there another way without using an addon-framework to initialize a backing-bean (without constructor intialization, managed-properties)? Stefan Gesigora -Ursprüngliche Nachricht- Von: Stefan Gesigora Gesendet: Mittwoch, 31. August 2005 11:21 An: MyFaces Discussion Betreff: AW: best way to initialize BackingBean? Hi! Thx Martin! How can I integrate Shale into JSF (Sun RI)? Is there a tutorial about this? Stefan Gesigora -Ursprüngliche Nachricht- Von: Martin Marinschek [mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 31. August 2005 11:13 An: MyFaces Discussion Betreff: Re: best way to initialize BackingBean? You might use Shale to do this kind of things. With Shale, if your beans implement a special interface, several methods will be called on your bean - one of them before the view is shown... regards, Martin On 8/31/05, Stefan Gesigora [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Hi folks! What is the best way to initialize BackingBeans? I would like to get data from a DB everytime before the jsp will be shown initializing the jsp with this data. I can't use the constructor initialization cause I need it everytime not only the first time. I can't use initialization via managed-property cause the data isn't static... Any suggestions? Thx Stefan Gesigora -- http://www.irian.at Your JSF powerhouse - JSF Trainings in English and German -- hicham ABASSI [EMAIL PROTECTED] -- hicham ABASSI [EMAIL PROTECTED]
Re: JSF + Spring + Hibernate
Hej everybody Thank you very much for your responses. I have got a lot of reading stuff from you all (including Hibernate chapter 20 to do, and maybe I should buy a book on Hibernate). I solved the problem by setting lazy=false like Enrique (see below if you are a beginner like me). OpenSessionInViewFilter did not work, but probably I made a mistake in the url-pattern although I changed it to *.faces (and use the hibernate3 package). The challenge is that I have mixed code in my current project, where some of the data is fetched using JDBC and the newest tiny part with Hibernate. If a jsf-page is hit, which does not need data from Hibernate, then the filter casts an exception due to a missing Hibernate session. But this is just a configuration issue in web.xml ;-) Regards ... Rick hibernate-mapping class name=dk.trafikstyrelsen.data.transfer.dto.railsecurity.danafile.ScanJourLink table=DANAFILE.SCANJOUR_LINK lazy=false id name=id type=long column=ROW_ID meta attribute=scope-setprotected/meta generator class=sequence param name=sequenceDANAFILE.SEQNUMBER/param /generator /id version column=REVISION name=revision / property name=objId type=string not-null=true/ ... /class /hibernate-mapping Onsdag 31 august 2005 15:13 skrev Werner Punz: The opensessioninview filter comes with spring, somebody posted already a semi correct configuration (that one was for struts, you have to adjust the filter patterns for jsf) it is probably the easiest way you can get, to deal with lazy binding, it at least has solved many problems regarding the lazy flag in my current struts project and works perfectly. werner Rick Gruber-Riemer wrote: You are right, I access the variable just in the same table in the next column. It seems to me, that I just have to get rid of all this lazy-stuff. Right now I do not care whether this gives me some resourceproblems. How and where can I specify, that I want a session per database request?
Re: immediate = true ?
Bjørn T Johansen wrote:
I thought the reason for setting this property to true, was so the submit would
skip the
validation phase, but that doesn't work for me...
I have the following...:
h:selectOneMenu accesskey=D value=#{bean.domainID} immediate=true
onchange=submit();
f:selectItems value=#{selectMain.listDomain}/
/h:selectOneMenu
h:inputText id=text value=#{bean.name} size=40 maxlength=40
required=true
f:validateLength minimum=3 maximum=30 /
/h:inputText
But when I change a value in the drop down box, the validation still occurs...
Does anyone know why?
Regards,
BTJ
Does not work that way... but I just had the same problem, there is a
simple workaround to the validation problem, if you want some kind of
cancel functionality, just bind the controls which you have to turn off
to the backend bean and if you want to bypass validation turn off
the validation on the controls directly, that way I could get a nice
cancel functionality although several fields of my form were
set to required...
Werner
Re: Concerning DataModel usage plus overhead?
Hello, I'm not sure I understand your problem, but I'll try to explain what I can : If your problem is that in fields in a table, only the first field is updated, then this has nothing to do with forceIndexFormula, and it might very well be a bug. I had a similar problem, but I didn't take the time to dig into it. Another probable bug is that the table content is only updated on the second request. This too might be a bug, and I didn't had time to check it either. The problem solved by forceIndexFormula is when the backend data can change between requests (order changes, or data insertion/deletion). It makes sure that the right row is updated. This is explained a the bottom of the t:dataTable doc : http://myfaces.apache.org/tomahawk/extDataTable.html HTH Sylvain. On Wed, 2005-08-31 at 08:53 +0200, Martin Marinschek wrote: Kevin, I am trying to get Sylvain involved in this to explain forceIndexFormula better (hint: this should be in the documentation ;) - but I believe that his solution is somewhat similar to your suggestion! Particularly, you just get the id of the data row as part of the client-id in your action, and it is your responsibility then to fetch this row! regards, Martin On 8/30/05, Kevin Galligan [EMAIL PROTECTED] wrote: My brain is very struts centric as well. There's some things I like about the JSF model too though. Thats why I'm probably landing somewhere in between. I generally avoided session scoping anything that didn't need to be, which I guess is my big reservation with JSF. I know exactly what you mean with the lazy list in the form. You do have some extra effort involved, like building the property string on the input objects and tracking the id's in a hidden input component, but there's not as much going on behind the curtain either. I think that's enough for today though... Rick Reumann wrote: On 8/30/05, Kevin Galligan [EMAIL PROTECTED] wrote: I think updating several rows at the same time, which might require local copies of the data, and just linking are two different things. They might need two different components. With Struts this was a piece of cake. Your ActionForm has a bean property that is a List of the objects you want to update (Helps if it's a LazyList if not using session scope), and when your form submits BeanUtils (in the background) simply copies your form objects to the List in the Action form. Super simple imo. The only slightly tricky part is validation, but I always provide a manual validation method in my Action classes so this was easy to handle.
Re: url query string parameters as input to JSF action - not possible??
Thank you for your opinions
I have a few notes:
1) If you need to invoke an action method you should definitely use
h:commandLink or h:commandButton BUT is it necessary to call an action method
whenever you need to move to a different page?
* using outputLink to navigate to a different page (plus specifying page
name + parameters explicitly) is not the best way BUT what if we would use
y:navigation method=GET navigationResult=detailPage
value=#{item.label}
f:param name=itemName value=#{item.name} /
f:param name=itemCategory value=#{item.category} /
/y:navigation - this could render as simple link a
href=detailPage.jsp?itemName=FerrariF50?itemCategory=SportsCarsFerrari
F50/a
2) Personally, I consider our solution as a hack from the point of view of
JSF BUT what if your application is REQUIRED to support links like
page.jspparameters= ...? (this requirement is pretty valid and useful!) Is
it impossible to achieve this neatly using JSF (MyFaces)???
I think code is sometimes like a cup of coffee. The taste is a unique
experience. I wouldn't say that creating a custom JSF component is a hack.
JSF just give you several methods to accomplish page navigation.
If you favor classic struts, you might prefer something like this:
h:outputLink value=detailPage.jsp
f:param name=itemName value=#{bean.productName}/
f:param name=itemId value=#{bean.productId}/
f:verbatimView acme widget/f:verbatim
/h:outputLink
managed-bean
description
This class simulates the classic Struts FormBean where
request parameters are populated in a POJO object.
/description
managed-bean-nameformBean/managed-bean-name
managed-bean-classxxx.MyFormBean/managed-bean-class
managed-bean-scoperequest/managed-bean-scope
managed-property
property-nameproductId/property-name
value#{param.itemId}/value
/managed-property
managed-property
property-nameproductName/property-name
value#{param.itemName}/value
/managed-property
/managed-bean
Gary
---BeginMessage---
Thank you for your opinions
I have a few notes:
1) If you need to invoke an action method you should
definitely use h:commandLink or h:commandButton BUT is it necessary to
call an action method whenever you need to move to a different page?
* using outputLink to navigate to a
different page (plus specifying page name + parameters explicitly) is
not the best way BUT what if we would use
y:navigation method=GET navigationResult=detailPage
value=#{item.label}
f:param name=itemName value=#{item.name} /
f:param name=itemCategory value=#{item.category} /
/y:navigation - this could render as simple link a
href=""
F50/a
2) Personally, I consider our solution as a hack from the
point of view of JSF BUT what if your application is REQUIRED to
support links like page.jspparameters= ...? (this requirement is
pretty valid and useful!) Is it impossible to achieve this neatly
using JSF (MyFaces)???
MNOn 8/30/05, Gary VanMatre [EMAIL PROTECTED] wrote:
snip I'm still a bit confused on how you deal with links that go to backing bean methods for standard links/buttons. As an example, imagine the header on a page...
John Doe[edit user] [logs for user] [user summary][look up company] 1455 some address[edit address] Somewhere, state, 12456 The example above is a bit exaggerated, but the point is the links(or
even buttons) would have to access methods in all different kinds of backing beans. You might give the commandLink component a try.h:commandLink id=editUser action=""
somBean.editUser}h:outputText value=edit user//h:commandLinkh:commandLink id=logsForUser action="">h:outputText value=logs for user/
/h:commandLink -- RickGary
---End Message---
Re: JSF + Spring + Hibernate
I have a question about designing a webapp to use a DAO layer, lazily loaded objects, Hibernate, and the OpenSessionInView technique. Doesn't this strategy make it very difficult to reimplement the DAO layer sometime in the future? If you switched a DAO implementation from Hibernate to let's say, Spring JDBC, then how would all the lazy loading work? There would be no equivalent OpenSessionInView technique for Spring JDBC. For this reason, I have been shying away from designing my domain objects such that the rest of the app expects them to lazily load data. So, instead of a Company class having a getEmployees() method, I would choose, instead, to have a CompanyDao.getEmployees(Company company) method that must be called at the point my webapp needs all the Employees for a Company. Have any of you had the same concerns? Or am I missing how a webapp that relies on lazy-loaded object graphs can change DAO implementations easily? -Ken
Re: JSF + Spring + Hibernate
Heheh, are you suggesting that making your DAO layer depend upon your view layer is a bad idea? I would have to agree Larry On 8/31/05, Ken Weiner [EMAIL PROTECTED] wrote: I have a question about designing a webapp to use a DAO layer, lazily loaded objects, Hibernate, and the OpenSessionInView technique. Doesn't this strategy make it very difficult to reimplement the DAO layer sometime in the future? If you switched a DAO implementation from Hibernate to let's say, Spring JDBC, then how would all the lazy loading work? There would be no equivalent OpenSessionInView technique for Spring JDBC. For this reason, I have been shying away from designing my domain objects such that the rest of the app expects them to lazily load data. So, instead of a Company class having a getEmployees() method, I would choose, instead, to have a CompanyDao.getEmployees(Company company) method that must be called at the point my webapp needs all the Employees for a Company. Have any of you had the same concerns? Or am I missing how a webapp that relies on lazy-loaded object graphs can change DAO implementations easily? -Ken
Thanks and a best practice question in regard to set up of backing bean Actions
Thanks everyone for your help with the crud demo app I've been working
with. (Special thanks to Brendan for his fine Car example code that
he posted in another thread).
I want to start out on the right foot doing things in a 'correct' way
before I get into some bad practices.
Currently, I have a list of employees in a table you click on the
employee and a backing bean method gets the correct row, grabs the id,
gets the true larger Employee object back, then forwards to an
Employee form where you can edit the employee info.
What I'm debating about his how to best set up the backing bean that
supports the 'save' of this form. Currently it's part of an
EmployeeAction object and the pertinent code looks like:
EmployeeAction.java
--
private EmployeeVO employee = new EmployeeVO();
private EmployeesListBean empListBean;
public EmployeesListBean getEmployeesListBean() {
return empListBean;
}
public void setEmployeesListBean(EmployeesListBean empListBean) {
this.empListBean = empListBean;
}
public EmployeeVO getEmployee() {
return employee;
}
public void setEmployee(EmployeeVO employee) {
this.employee = employee;
}
public String prepareForEdit() {
log.debug(prepareForEdit);
this.employee =
(EmployeeVO)getEmployeesListBean().getEmployeesModel().getRowData();
//get Employee from backend
this.employee = EmployeeService.getEmployee( employee.getId() );
log.debug(returned employee = +employee );
return success;
}
public String saveAction() {
//need way to tell update vs insert ?
log.debug(In saveAction );
EmployeeService.updateEmployee(employee);
return success;
}
The prepareForEdit method is called from a link next to the name of
each employee on the employees.jsp. After clicking the link the
success result will navigate you to emloyeeForm.jsp...
The part I'm not so sure about is the setup of the EmployeeAction..
I'm having to initialize EmployeeVO employee = new EmployeeVO();
because if I don't have this, I'll end up with conversion errors since
the employee is null when the form submits. Is it better to not create
this new instance and maybe use saveState on the form instead?
Also on the form I'm doing...
h:inputText value=#{employeeAction.employee.name}/
I like the above since it saves me from having to add extra set/gets
in my EmployeeAction class to deal with the EmployeeVO nested inside
of EmployeeAction.However maybe there are some major drawbacks to
doing it that way I've implemented it?
Thanks for any comments.
Re: JSF + Spring + Hibernate
Actually some valid points here, but the whole opensessioninviewfilter technique is more like a keep the session open as long as possible technique, so that you do not have to care about it anywhere. so basically what happens is following, that normally you have the problem of keeping track of prefetching etc... and often the session handling on dao level, now the session handling is moved into the request cycle and now should be fully transparent to the user (not allways but often enough) the benefit you get from this, is that you do not run into the lazy loading issues as often as with small dedicated sessions... So what happens if you move lets say from Hibernate to plain JDBC... you simple remove the opensessioninview filter and from the outside you handle the pojos the same, all which happens is that you replace lots of lazy loaded classes and some dao code with the same classes prefilled from the jdbc connection... the OpenSessionInView filter basically just eases the pain of having to keep track of lazily loaded classes in many instances (not in all) but besides that is rather transparent to the implementation if done well... I wil give you an example without OpenSessionInView... load some person classes getHibernateTemplate().load(Person.class, id); with OpenSessionInView getHibernateTemplate().load(Person.class, id); the main difference is, that if person in the first case references another bunch of lazy objects like: person.getAddress().getStreetName()... you might get an error while rendering the data or doing something with it in the second case you wont get the error, because the lazy loading still can be done due to the open session. ideal would be to have some kind of session per session filter but in most circumstances that is not possible, so opensessioninview is the second best choice you can get. Werner Ken Weiner wrote: I have a question about designing a webapp to use a DAO layer, lazily loaded objects, Hibernate, and the OpenSessionInView technique. Doesn't this strategy make it very difficult to reimplement the DAO layer sometime in the future? If you switched a DAO implementation from Hibernate to let's say, Spring JDBC, then how would all the lazy loading work? There would be no equivalent OpenSessionInView technique for Spring JDBC. For this reason, I have been shying away from designing my domain objects such that the rest of the app expects them to lazily load data. So, instead of a Company class having a getEmployees() method, I would choose, instead, to have a CompanyDao.getEmployees(Company company) method that must be called at the point my webapp needs all the Employees for a Company. Have any of you had the same concerns? Or am I missing how a webapp that relies on lazy-loaded object graphs can change DAO implementations easily? -Ken
Re: Problem with t:div
I've just tried to reproduce this problem with the latest SVN and everything seems to be working ok. What server are you using? Are there any old myfaces jars in the classpath? Bruno 2005/8/31, [EMAIL PROTECTED] [EMAIL PROTECTED]: Hello all, I am using the latest Night build. On a Page with a t:div I get first a lot of warnings: WARN [2005-08-31 18:07:13,685] HtmlRenderKitImpl - Unsupported component-family/renderer-type: javax.faces.Output/org.apache.myfaces.DivRenderer WARN [2005-08-31 18:07:13,685] HtmlRenderKitImpl - Unsupported component-family/renderer-type: javax.faces.Output/org.apache.myfaces.DivRenderer and then a lot of errors till a stack overflow error: at org.apache.myfaces.custom.div.Div.getClientId(Div.java:54) at javax.faces.component.UIComponentBase.getRenderer( UIComponentBase.java:531) at org.apache.myfaces.custom.div.Div.getClientId(Div.java:54) java.lang.StackOverflowError Is this a bug or I am doing something wrong? Regards, Marc
Re: best way to initialize BackingBean?
On 8/31/05, Ken Weiner [EMAIL PROTECTED] wrote:
The Spring JSF integration I've seen focuses on enabling Spring IoC for
JSF managed beans. There is a way to enable IoC for JSF
Converters, Validators, and UIComponents too. I posted
information on the Spring JSF Wiki: http://opensource.atlassian.com/confluence/spring/x/Qgo
I was hoping Spring would incorporate the SpringApplication and
SpringApplicationFactory code in a future release, but there haven't
yet been comments on the Wiki page.
For converters, isn't this already possible out of the box (if you've got the Spring IoC integration with managed beans)?
h:inputText ... converter=#{myConverter} .../
where myConverter is a spring bean.
For validators, you can bind to a validator *method* of some bean that happens to be created via the IoC facility.
-Ken
Craig
RE: Highlight datatable row based on business logic
Title: Message
If you
use t:column instead of h:column, you can specify a style, and,
if you combine thisa rendered="#{myBean.styleQuery}" attribute setting,
then you can conditionally set a style for that cell. That's as far as
we've gotten in being able to set styles dynamically in a
table.
-
Brendan
-Original Message-From: Matt Cronin
[mailto:[EMAIL PROTECTED] Sent: Wednesday, August 31, 2005 1:03
PMTo: users@myfaces.apache.orgSubject: Highlight
datatable row based on business logicI have seen that the
datatable allows highlighting of rows, but all the examples seem to highlight
alternate rows. I would like to highlight specific rows based on
business logic. Is there a way to do this with the datatable?
RE: JSF + Spring + Hibernate
You can also use transfer objects with your DAOs, or turn lazy loading off for certain classes or collections that you are using as transfer objects. Either approach will eliminate the need for OpenSessionInView-like things and enable you to switch DAO implemenations. The right choice depends on how much work you are willing to do in order to be able to switch DAO implementations. -Original Message- From: news [mailto:[EMAIL PROTECTED] On Behalf Of Werner Punz Sent: Wednesday, August 31, 2005 1:52 PM To: users@myfaces.apache.org Subject: Re: JSF + Spring + Hibernate well OpenSessionInView... is one of those rare circumstances where it actually makes sense, because it eases the portability and implementation... I would not say it reall is dependend on the view layer, more on the control layer of the server... It is one of those border cases... Larry Meadors wrote: Heheh, are you suggesting that making your DAO layer depend upon your view layer is a bad idea? I would have to agree Larry On 8/31/05, Ken Weiner [EMAIL PROTECTED] wrote: I have a question about designing a webapp to use a DAO layer, lazily loaded objects, Hibernate, and the OpenSessionInView technique. Doesn't this strategy make it very difficult to reimplement the DAO layer sometime in the future? If you switched a DAO implementation from Hibernate to let's say, Spring JDBC, then how would all the lazy loading work? There would be no equivalent OpenSessionInView technique for Spring JDBC. For this reason, I have been shying away from designing my domain objects such that the rest of the app expects them to lazily load data. So, instead of a Company class having a getEmployees() method, I would choose, instead, to have a CompanyDao.getEmployees(Company company) method that must be called at the point my webapp needs all the Employees for a Company. Have any of you had the same concerns? Or am I missing how a webapp that relies on lazy-loaded object graphs can change DAO implementations easily? -Ken
Re: JSF + Spring + Hibernate
The issue I was getting at was that knowing that your app has this lazy loading capability, you may make different design decisions on what methods go into your domain objects and what your domain object graph looks like. I prefer to design the domain object graphs, keeping in mind that the DAO layer would be responsible for completely loading the graphs. So if there are many Employees for a Company and you don't always want to load the Employees when you load a Company, then I probably wouldn't put a getEmployees() method on the Company class. I guess you could argue that it is okay to add the getEmployees() method and document it so that sometimes it returns null and sometimes it doesn't, but that seems undesireable to me. I'd rather leave off the method and add an extra method to a DAO that can fetch the employees for a Company whenever I need them. -KenOn 8/31/05, Werner Punz [EMAIL PROTECTED] wrote: well OpenSessionInView... is one of those rare circumstances where itactually makes sense, because it eases the portability and implementation...I would not say it reall is dependend on the view layer, more on the control layer of the server...It is one of those border cases...Larry Meadors wrote: Heheh, are you suggesting that making your DAO layer depend upon your view layer is a bad idea? I would have to agree Larry On 8/31/05, Ken Weiner [EMAIL PROTECTED] wrote:I have a question about designing a webapp to use a DAO layer, lazily loaded objects, Hibernate, and the OpenSessionInView technique. Doesn't this strategy make it very difficult to reimplement the DAO layersometime in the future?If you switched a DAO implementation from Hibernate to let's say, Spring JDBC, then how would all the lazy loading work?Therewould be no equivalent OpenSessionInView technique for Spring JDBC.Forthis reason, I have been shying away from designing my domain objects such that the rest of the app expects them to lazily load data. So, instead of a Company class having a getEmployees() method, I wouldchoose, instead, to have a CompanyDao.getEmployees (Company company) methodthat must be called at the point my webapp needs all the Employees for aCompany. Have any of you had the same concerns?Or am I missing how a webapp that relies on lazy-loaded object graphs can change DAO implementations easily? -Ken
Re: JSF + Spring + Hibernate
Joshua Davis wrote: You can also use transfer objects with your DAOs, or turn lazy loading off for certain classes or collections that you are using as transfer objects. Either approach will eliminate the need for OpenSessionInView-like things and enable you to switch DAO implemenations. The right choice depends on how much work you are willing to do in order to be able to switch DAO implementations. I still do not see the problem of the opensessioninview filter... the method is totally transparent, and if you are in need for a different dao layer, then simply turn it off on the pages where you already have replaced the layer. The filter itself, just simplifies the handling of lazy loaded objects in a transparent way to the programmer, so that he in most cases does not have to care anymore if the object is lazily bound or not. Werner
Re: best way to initialize BackingBean?
h:inputText ... converter=#{myConverter}
.../
If I have a converter configured as myConverter in
faces-config.xml, it looks like this
h:inputText ... converter=myConverter
.../
Under which circumstances are the #{} needed?
Re: best way to initialize BackingBean?
I hadn't thought of that. I guess it would work fine when you
want to specify a converter by ID. However, it wouldn't work when
JSF looks for a converter by Class, would it?On 8/31/05, Craig McClanahan [EMAIL PROTECTED] wrote:
On 8/31/05, Ken Weiner
[EMAIL PROTECTED] wrote:
The Spring JSF integration I've seen focuses on enabling Spring IoC for
JSF managed beans. There is a way to enable IoC for JSF
Converters, Validators, and UIComponents too. I posted
information on the Spring JSF Wiki: http://opensource.atlassian.com/confluence/spring/x/Qgo
I was hoping Spring would incorporate the SpringApplication and
SpringApplicationFactory code in a future release, but there haven't
yet been comments on the Wiki page.
For converters, isn't this already possible out of the box (if you've got the Spring IoC integration with managed beans)?
h:inputText ... converter=#{myConverter} .../
where myConverter is a spring bean.
For validators, you can bind to a validator *method* of some bean that happens to be created via the IoC facility.
-Ken
Craig
Re: best way to initialize BackingBean?
On 8/31/05, Ken Weiner [EMAIL PROTECTED] wrote: I hadn't thought of that. I guess it would work fine when you want to specify a converter by ID. However, it wouldn't work when JSF looks for a converter by Class, would it? If you are using by-Class converters, you don't need to register them on the *component* at all -- they get registered in the Application instance along with the class they are for. I'm not sure I see a need to use a DI framework to instantiate those, since you already have the ability to configure the implementation class that will be used. For converters registered by id, see my next response to a a separate question in this thread. Craig
Re: best way to initialize BackingBean?
On 8/31/05, Craig McClanahan [EMAIL PROTECTED] wrote: If you are using by-Class converters, you don't need to register them on the *component* at all -- they get registered in the Application instance along with the class they are for. I'm not sure I see a need to use a DI framework to instantiate those, since you already have the ability to configure the implementation class that will be used. Craig, Can you expand on this? What do I need to do to gain the ability to configure the implementation class? I have lots of converters registered by class, and I want to DI a managed JSF bean into each of them. How do I do this? -Mike
Re: best way to initialize BackingBean?
On 8/31/05, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
h:inputText ... converter=#{myConverter}
.../
If I have a converter configured as myConverter in
faces-config.xml, it looks like this
h:inputText ... converter=myConverter
.../
Under which circumstances are the #{} needed?
If you have a converter registered by id, you would not need the
#{...} _expression_ capability. But, that limits you to an
instance of the converter that is essentially created like what you'd
get from a new operator, with only the default set of
properties. What if you want to use some Converter class, but
customize its property settings?
This question surfaces an interesting (and not always understood) feature of the converter property:
* If you pass a literal string, JSF looks up a converter that you
have registered by id in some faces-config.xml file.
* If you pass a value binding _expression_, JSF evaluates it
at runtime and expects the evaluation to return an instance
of type javax.faces.convert.Converter.
Even without Spring in the picture, that means you can declare a
managed bean named myConverter that will be instantiated on demand
(when the #{myConverter} is evaluated). Just to give a trivial
example of this, lets assume your model data is of type java.util.Date,
but you always want to display it showing the time only (i.e. if you're
using the standard DateTimeConverter, you would set the type property
to time. You can define a component like this:
h:inputText ... converter=#{timeConverter} .../
and then define a managed bean in your faces-config.xml file:
managed-bean
managed-bean-nametimeConverter/managed-bean-name
managed-bean-classjavax.faces.convert.DateTimeConverter/managed-bean-class
managed-bean-scopenone/managed-bean-scope
managed-property
property-nametype/property-name
valuetime/value
/managed-property
/managed-bean
and you'll get a preconfigured converter that does the right thing,
without having to remember to set the property every single time.
For extra fun, you can use value binding expressions in the
value element, to initialze property values based on dynamic
conditions. JSF's managed beans, in other words, *provide* a
simple Dependency Injection (DI) or Inversion of Control (IoC)
framework out of the box.
If you include the Spring IoC integration along with JSF, you can still
do the above ... or, you can use the standard Spring configuration file
to instantiate a Spring bean named timeConverter, configured using
the full power of DI that Spring offers (for example, you can
instantiate an instance that uses constructor injection instead of
setter injection). That's because the integration layer will
first look to see if there is a managed bean definition for a given
name and, if not, check to see if Spring knows how to create one.
The developer who writes the value bnding _expression_ into the JSP page
does not have to know or care which mechanism is actually used to
create the converter for you at runtime.
Craig
RE: Thanks and a best practice question in regard to set up of backing bean Actions
You'll also want an EmployeeBean as a managed bean, which can be defined
as having type EmployeeVO.
Then you'll want your EmployeeAction to have a managed reference to
EmployeeBean, and don't instantiate that; let JSF do that. And don't
instantiate it; let JSF do that. Then, when the user hits Save, JSF
will automatically populate your EmployeeBean with the correct values
(assuming your JSF page uses EmployeeBean), and your save() method can
just refer to the EmployeeBean values.
- Brendan
-Original Message-
From: Rick Reumann [mailto:[EMAIL PROTECTED]
Sent: Wednesday, August 31, 2005 12:48 PM
To: MyFaces Discussion
Subject: Thanks and a best practice question in regard to set up of
backing bean Actions
Thanks everyone for your help with the crud demo app I've been working
with. (Special thanks to Brendan for his fine Car example code that
he posted in another thread).
I want to start out on the right foot doing things in a 'correct' way
before I get into some bad practices.
Currently, I have a list of employees in a table you click on the
employee and a backing bean method gets the correct row, grabs the id,
gets the true larger Employee object back, then forwards to an
Employee form where you can edit the employee info.
What I'm debating about his how to best set up the backing bean that
supports the 'save' of this form. Currently it's part of an
EmployeeAction object and the pertinent code looks like:
EmployeeAction.java
--
private EmployeeVO employee = new EmployeeVO();
private EmployeesListBean empListBean;
public EmployeesListBean getEmployeesListBean() {
return empListBean;
}
public void setEmployeesListBean(EmployeesListBean empListBean) {
this.empListBean = empListBean;
}
public EmployeeVO getEmployee() {
return employee;
}
public void setEmployee(EmployeeVO employee) {
this.employee = employee;
}
public String prepareForEdit() {
log.debug(prepareForEdit);
this.employee =
(EmployeeVO)getEmployeesListBean().getEmployeesModel().getRowData();
//get Employee from backend
this.employee = EmployeeService.getEmployee( employee.getId() );
log.debug(returned employee = +employee );
return success;
}
public String saveAction() {
//need way to tell update vs insert ?
log.debug(In saveAction );
EmployeeService.updateEmployee(employee);
return success;
}
The prepareForEdit method is called from a link next to the name of
each employee on the employees.jsp. After clicking the link the
success result will navigate you to emloyeeForm.jsp...
The part I'm not so sure about is the setup of the EmployeeAction..
I'm having to initialize EmployeeVO employee = new EmployeeVO();
because if I don't have this, I'll end up with conversion errors since
the employee is null when the form submits. Is it better to not create
this new instance and maybe use saveState on the form instead?
Also on the form I'm doing...
h:inputText value=#{employeeAction.employee.name}/
I like the above since it saves me from having to add extra set/gets
in my EmployeeAction class to deal with the EmployeeVO nested inside
of EmployeeAction.However maybe there are some major drawbacks to
doing it that way I've implemented it?
Thanks for any comments.
Re: best way to initialize BackingBean?
On 8/31/05, Craig McClanahan [EMAIL PROTECTED] wrote: In other words, you want to use DI for configuring properties on a by-class converter? That, sadly, isn't supported unless you were to override the Application instance provided by your JSF impementation (or if your JSF implementation provided this feature as part of its own implementation, hint hint :-). The technique I described doesn't reference any by-id or by-type registered converters ... it creates anonymous instances. Yeah, after I sent the message, I saw that we were discussion two separate issues. DI of managed beans into a by-class converter was what I was referring to as a weakness in JSF converter/managed-beans configuration, and not injecting the converter into something else. Ken Weiner's methodology looks like it can solve this problem (which, as you repeat above, it does by overriding the Application instance).
RE: ajax ajax ajax
Hi
Enrique
I'm
not developing using Ajax.But I found the components in http://wiki.apache.org/myfaces/AJAX_Framework
working in Firefox. So I though that it is not the issue with
Firefox 1.0.6.
Balaji
-Original Message-From: Enrique Medina
[mailto:[EMAIL PROTECTED]Sent: Wednesday, 31 August 2005 11:02
PMTo: MyFaces DiscussionSubject: Re: ajax ajax
ajaxHi Balaji,I have just downloaded Firefox
1.0.6 and still doesn't work for me...Could you please post a quick
step-by-step guide of your configuration?Thanks.
2005/8/31, Balaji Kalyansundaram [EMAIL PROTECTED]:
It works in Firefox
1.0.6
-Original
Message-From: Enrique Medina [mailto:[EMAIL PROTECTED]]Sent: Tuesday, 30 August
2005 8:48 PMTo: MyFaces DiscussionSubject: Re: ajax
ajax ajaxAlso is not working for me in Firefox 1.0
:-(Error: [Exception... "Component returned failure code:
0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIXMLHttpRequest.getResponseHe
ader]" nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"
location: "JS frame :: http://localhost:8080/DeltaR/faces/myFacesExtensionResource/ajax.UIAjaxViewComponent/11245933/JSFAJAX.js
:: anonymous :: line 48" data: no]Source File: http://localhost:8080/DeltaR/faces/myFacesExtensionResource/ajax.UIAjaxViewComponent/11245933/JSFAJAX.js
Line: 48where the source line is: var idsFromResponse = req.getResponseHeader("Ajax-Update-Ids");
2005/8/30, Arash Bijanzadeh [EMAIL PROTECTED]:
On 8/15/05, Werner Punz [EMAIL PROTECTED]
wrote:
Just
checked the wiki again, some russian guy postedlinks to his
projectthat stuff looks really interestinghttp://wiki.apache.org/myfaces/AJAX_Framework
It is not working on mozilla
1.7.8 with error message AJAX not found!--
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Re: saveState confusion/question
How's it breaking? The little info that you've provided seems fine.
However, you might find it more efficient to do this since you're
doing the same thing with an hidden field.
x:saveState id=employee value=#{employeeAction.employee.id}/
-Mike
On 8/31/05, Rick Reumann [EMAIL PROTECTED] wrote:
I'd like to use saveState to avoid having to use hidden vars on a form...
h:inputText value=#{employeeAction.employee.name}/
h:inputText value=#{employeeAction.employee.id}/ --- use saveState
instead?
EmployeeAction has a reference to Employee:
managed-bean
managed-bean-nameemployeeAction/managed-bean-name
managed-bean-classnet.reumann.EmployeeAction/managed-bean-class
managed-bean-scoperequest/managed-bean-scope
managed-property
property-nameemployeesListBean/property-name
value#{employeesListBean}/value
/managed-property
managed-property
property-nameemployee/property-name
value#{employee}/value
/managed-property
/managed-bean
I have both EmployeeAction and Employee implementing Serializable.
I've tried
x:saveState id=employeeAction value=#{employeeAction}/
and
x:saveState id=employee value=#{employeeAction.employee}/
I'm having difficulty getting saveState to work. Any tips much appreciated.
Things work fine if use the hidden vars.
Cannot sort x:DataTable Page structure issue?
Hello everyone, Problem: I want to use the x:DataTable tag. It works, with and without J-Script, if I use the page structure of the myfaces example (see below) with my managed bean. -So far so good -. If i copy and paste the working x:DataTable-Tag in my page structure (see below), to the place where I want it to appear, it is displayed correctly the first time but cannot be sorted, i.e. the sort-page-respose does not contain any change, neither with client or server-side state saving, neither with or without J-Script. Question: Any ideas? Note1: I wrote the managed bean referring to the example extending an abstract sortablelist. The problem does not seem to be here. Note2: My page structure is more complicated than the example, due to the fact that I use tiles with the myfaces JspTilesViewHandlerImpl. Note3: I used to have many struggles with my page structure in the past. I thought I'd done it right now. Thanks to all of you in advance Regards Christian Myfaces example page structure -- %@ taglib... % html body f:view f:loadBundle .../ x:dataTable styleClass=standardTable // code according to example /x:dataTable /f:view /body /html My Structure html f:view head link rel=stylesheet .../ f:loadBundle ... / title h:outputText ...//title /head body f:subview h:form h:panelGrid f:facet name=header h:panelGrid [] /h:panelGrid /f:facet f:subview id=menu h:panelGrid [] /h:panelGrid /f:subview f:subview id=content x:dataTable styleClass=standardTable ### code according to example ### /x:dataTable /f:subview f:facet name=footer h:panelGroup styleClass=footer [] /h:panelGroup /f:facet /h:panelGrid /h:form /f:subview /body /f:view /html
RE: JSF + Spring + Hibernate
The scope of the Hibernate session must match the scope of any lazily loaded objects or collections. That's one of the rules of Hibernate (or any other ORM that I've used, for that matter). Putting a proxy object in web session scope while the Hibernate session is in request scope breaks that rule. You need to either use a transfer object, or cause Hibernate to initialize the proxy by either setting the lazy attribute to false, or using Hibernate.initialize(). You can also re-associate the object with the Hibernate session as was mentioned before. [EMAIL PROTECTED] I think you may have skipped the rest of my email. I detailed the ways I'm working around that. Yep, I read it. I understand it breaks the Hibernate contract, I was merely mentioning it as a possible issue because everyone had simply been talking about problems within a single request. I just wanted to point out that that is not the only issue with lazily loaded objects and you need to be careful about putting them in the HTTP session. What do you mean by use a transfer object? Transfer Object is a design pattern frequently used with EJB: http://java.sun.com/blueprints/corej2eepatterns/Patterns/TransferObject.html . Your managed beans could copy the Hibernate-mapped objects (I call them Persistent Domain Objects) into simple POJOs that aren't mapped. Leave these in the session, stick them in a cache, store them in base64 encoded hidden input fields, or whatever. That's the first time I've ever heard anyone mention that. The problem with telling Hibernate to initialize the object graph is that, in most cases I think, the use of Hibernate is abstracted away from the webapp layer. So your backing beans don't really know they need to do that and even if they did they couldn't. The DAO should do it. The backing beans (business session pattern) can ask the DAO to do it in an abstract way. And setting the lazy attribute to false is a workaround, but could lead to large graphs being loaded into many users HTTP sessions. This works for simple graphs only. For complex graphs, your DAO (which is the only thing in your system that should import Hibernate) can pick and chose which objects to initialize. What this is doing is essentially turning your PDOs into Transfer Objects. Reassociating the object with the session has a similar problem as trying to initialize the object from within the webapp layer before putting it in the session. Your webapp simply does not know that you are using Hibernate. And even if it did, it has no access to the actual Hibernate session. I toyed around at one time with the idea of trying to create a servlet filter that would automatically reassociate anything in the HTTP session with the Hibernate session. There are a couple of problems with that tho. First off, it's not always easy to determine what objects are Hibernate persisted objects and which aren't. Second, if the actual Hibernate object is wrapped in a backing bean that is actually put in the HTTP session simply scanning objects in the HTTP session won't work. Finally, what convinced me it was a bad idea is that the only ways to reassociate an object with a Hibernate session that I was able to find is to use merge(), update(), or lock(). The first two will update the database with the object you provide, and locking requires the underlying data in the db hasn't changed. So you'd lose any changes that could have occured while the object was in the session. Yikes! That sounds complicated. ;) The only reason you would want to reassociate the objects is if you want to update them. If you are just using the session as a cache, then these objects should not be mapped. That will cause all kinds of headaches. So, like I said, just refetching the Hibernate objects for each request is much easier and doesn't cause too much extra load on the database if your using the 2nd level cache. Bingo! You've got it there. To me, it makes sense to use Transfer Objects, or at least make the integration layer (where the DAOs live) able to provide initialized sub-graphs - mapped objects turned into Transfer Objects. Which brings me back to JSF... My current JSF application uses DAOs that provide the mapped objects to the business beans. These beans create transfer objects that are accessed by the view. When actions that require db modification occur, the DAO is used to look up the object again and the new values are set into the mapped object from the transfer object. This is a little bit more programming if you have a separate class for the mapped object and the transfer object, but it's not much more work at all if you use the initialized subgraph concept. The benefit is that there is no need for any fancy session reassociation or anything like that. The presentation layer and the persistence (integration) layer are
Process the Submitted Data Table and Create Another List
I have create a data table A based on a List. To
create this data table A with a checkbox in each row
of the table, I specify the following:
a. managed-bean-class: packageName.ListAction
b. managed-bean-name: listAction
c. The List is called personnel.
d. The properties of the PersonnelBean are the columns
of data Table.
e. I have a selected boolean property on the
PersonnelBean that can be used to mark which persons
have been selected.
I am going to submit all the data in table A,
iterate through all the rows and create another List
based on marked checkboxes. And I have four questions
regarding how to process the data. My questions are
embedded in the code below. For display ing the next
data table B that contains all the selected records
of data table A:
a. managed-bean-class: packageName.SelectAction.
b. managed-bean-name: selectAction
c. The List to be created is called departPersonnel
[code]
import
public class SelectAction
{
List departPersonnel = null;
public SelectAction()
{
SelectDelegate sd = new SelectDelegate();
// Question 1. Should I put the next two line
of code here?
// or I should put the
next two line of code in the
// SelectDelegate
class and call the
//
updateDepartPersonnel()
// method of that class
without supplying a parameter?
DataModel personnelData =
ListAction().getPersonnel();
List personnel =
(List)personnelData.getWrappedData();
departPersonnel = sd.updateDepartPersonnel(
personnel );
}
// Question 2. A bean should have an empty
constructor and a pair of
//get and set methods for
each of its properties. I
// certainly do not have an
empty constructor. What is the
// correct way of doing it?
public List getDepartPersonnel()
{
return this.departPersonnel;
}
public void setDepartPersonnel( List data )
{
this departPersonnel= data;
}
}
[/code]
[code]
import .
public class SelectDelegate
{
List departPersonnel = null;
// Method to update all the selected personnel
records
public List updateDepartPersonnel()
{
DataModel personnelData =
ListAction().getPersonnel();
List personnel =
(List)personnelData.getWrappedData();
// Iterate through the data rows ...
int first = 0;
int rows = personnel.size();
for (int index = first; index (first +
rows); index++)
{
// Question 3. Does the statement below
obtain all the properties
//of a particular
row?
PersonnelBean personnelBean =
(PersonnelBean)personnel.get(index);
// If this row is selected, add all data
fields the corresponding personnel information
// Question 4. The selected is the
boolean property of the
//PersonnelBean.
Should I code
//if
(personnelBean.selected) { ... } instead?
if (personnelBean.isSelected())
{
departPersonnel.add( personnelBean );
}
}
return departPersonnel;
}
[/code]
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