How to create a web flow with Struts
Hi I have a new project were I have to create an application that is a web flow of multiple standalone applications. Basically the user picks a service and the web flow will take the user to all the applications necessary to fulfill the service. We want to be able to save in a database the user navigation information. Has anybody done something like this with struts? Regards, Néstor Boscán
RE: Which version of Validator was shipped with Struts 1.1b2
Thanks a lot Phil. I hope somene can tell me how to do this, because I'm not into CVS at all. -Original Message- From: Phil Steitz [mailto:[EMAIL PROTECTED] Sent: Friday, April 08, 2005 8:27 AM To: Struts Users Mailing List Subject: Re: Which version of Validator was shipped with Struts 1.1b2 IIRC, at the time when struts 1.1b2 was released, struts was bundling commons jars built from tagged sources. There is a tag named STRUTS_1_1_B2 in the validator sources. If you check out the source files using this tag, you should get the sources corresponding to what was bundled with struts 1.1b2. Can one of the struts committers pls confirm this? Also, is there an svn way to grab these sources or should they be checked out from the old cvs repo? Phil On Apr 4, 2005 3:02 AM, tarek.nabil <[EMAIL PROTECTED]> wrote: > Hi, > > I'm using Oracle's BC4J framework which was shipped with JDeveloper > 9.0.3.4 and I can not upgrade to newer versions. This frameworks > supports Struts 1.1b2 and not any other version. I'm currently facing > a problem with getting the validation framework to work in my > application and I need to debug using the source code. > > My problem is, I can not determine exactly which version of > commons-validator shipped with Struts 1.1b2. I tried almost all the > versions on the distribution site and there's a mismatch between all > of them and the JAR file that shipped with Struts 1.1b2. > Unfortunately, the manifest file in the JAR doesn't say anything :( > > I really need to determine the version and also get my hands on the > source code. I'm having a problem with the fact that some of the older > source code is being taken off the arhive.apache.org site. For > example, Struts 1.1b2 is not on the site and if the source wasn't > shipped with JDeveloper I wouldn't have been able to get my hands on it. > Unfortunately, the source of the dependencies is not shipped with > JDeveloper. > > Please help. > > Tarek Nabil > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005 1:12 PM, Anil <[EMAIL PROTECTED]> wrote: > Matt Raible raibledesigns.com> writes: > > > > > As far as drop-downs, I typically populate all (or most) of mine from a > > database at application startup using a ServletListener. I stuff these > > into the application scope as Lists of LabelValue beans. Then I code > > up a ReloadAction that can call my Listener to reload them all. I've > > found this useful so I don't have to restart the app if data changes. > > > > Matt > > > > If I have edit screens for the drop-downs, I'll replace the List in > > application scope after saving. > > If the application scope has been used to store the drop-down values, how will > you handle the updates on data in application scope in clustered environment? > Is there any way to get rid of the problem? > One option would be to add an administrative action in your URL that calls the code to reinitialze the application scoped lists (i.e. the same code called by your context listener or init method to load them in the first place)? That way, you can set up a button or something that triggers reloading whenever someone knows that it is necessary. An alternative strategy I've used in the past is to have a single application scope bean that exposes each of the lists as a read-only property. The getter for that list, then, could do something (such as a cheap database read to get a last modified timestamp or something) to see if it needs to refresh the list before returning it. That way, the user of the list never has to worry about reloading. > Anil. Craig - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: session expiration issue and tiles
sudip shrestha wrote: I have user types with varying level of privileges and only a defined user type can access a particular page. I thought of using filter for this purpose, but not sure how to designate which layout*.jsp (have created multiple layout.jsp pages for varying user types: e.g. admin can access layout1.jsp, user can access layout2.jsp) can be accessed by which user type. I'm not sure if we're addressing the same problems, or if my solution is a good one, but I have "tiles:insert" tags that insert menuing sub-tiles wrapped by an authorization level check, so depending on their auth level they get a different menu tile inserted. So the overall layout is the same for all user types, but different user authorization levels have different subtiles inserted. This method could be extended to cover any aspect of the layout: in my case it's a single row of menu options underneath the page's logo header. I imagine you could also create the name of the tile to be inserted on-the-fly using EL, but I didn't do that. Don't know why not; that seems cleaner, but I'm tired. Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005, at 2:12 PM, Anil wrote: Matt Raible raibledesigns.com> writes: As far as drop-downs, I typically populate all (or most) of mine from a database at application startup using a ServletListener. I stuff these into the application scope as Lists of LabelValue beans. Then I code up a ReloadAction that can call my Listener to reload them all. I've found this useful so I don't have to restart the app if data changes. Matt If I have edit screens for the drop-downs, I'll replace the List in application scope after saving. If the application scope has been used to store the drop-down values, how will you handle the updates on data in application scope in clustered environment? Is there any way to get rid of the problem? I tend to do this mostly for drop-downs that are pretty much static, but might change once a week/month. I'm probably over-engineering in most cases - but once the infrastructure is setup, it's easy to do. In a clustered environment, I'd probably keep the same solution and take the hit on application startup. Otherwise, you could do request-scoped lists when you load your forms - or use something like XmlHttpRequest (the DWR project is nice - http://drw.dev.java.net) to populate drop-downs when your pages loads. Spring MVC is pretty slick in that their form controllers have a "referenceData()" method that's specifically designed to populate drop-downs and such. Matt - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: session expiration issue and tiles
Dave:
I have user types with varying level of privileges and only a defined
user type can access a particular page. I thought of using filter for
this purpose, but not sure how to designate which layout*.jsp (have
created multiple layout.jsp pages for varying user types: e.g. admin
can access layout1.jsp, user can access layout2.jsp) can be accessed
by which user type. I could not use ldaprealm as system
administrators disagreed to storing password in server.xml file (which
is needed to read group membership)(I could have used container
managed security), so I am using tiles-layout page for the
verification. This auth piece is at the top of the page, so I don't
see the page already outputting to the HTTP connection before this
script executes.
On Apr 8, 2005 11:55 AM, Dave Newton <[EMAIL PROTECTED]> wrote:
> sudip shrestha wrote:
>
> >--
> >I have few layout.jsp templates where I have following chuck of code
> >which should redirect the browser to login page if session expires:
> ><% String loginCheck = "notLoggedIn";
> > if( session.getAttribute( "session_unique_id" )!=null )
> > {
> > loginCheck = (String)session.getAttribute(
> > "session_unique_id" );
> > }
> > if( !loginCheck.equals("admin0") )
> > {
> >%>
> >
> ><% }
> >%>
> >
> >But when session expires, or when somebody who is not 'admin0' tries
> >to access the page, they get a blank page instead of getting
> >redirection. I have tried using jsp:forward directive as well, but
> >the result is same.
> >If anybody has any suggestion on this, please let me know.
> >
> >
> Put this logic somewhere else like a filter or request processor.
>
> Not knowing the full layout of your tiles I'd say that you've probably
> already output to the HTTP connection, which means you can't redirect
> anymore. Just a guess. In any case this is handled _far_ better some
> place other than the presentation layer, especially if you have the same
> code in more than one place--sketchy.
>
> Dave
>
> -
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>
>
-
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Re: Meta Information in Action Form
Craig McClanahan wrote: That being said, I have seen cases where the potential performance penalty is quite large (many seconds of database access), which will show up in one of your users waiting an abnormally long time for their response -- not something I would find very appealling. I don't like my users much anyway. If it were up to me, they'd be waiting an infinitely long time for EVERYTHING. Saves me the trouble of having to write it. It's Friday, and I'm crabby :/ ;) Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
Matt Raible raibledesigns.com> writes: > > As far as drop-downs, I typically populate all (or most) of mine from a > database at application startup using a ServletListener. I stuff these > into the application scope as Lists of LabelValue beans. Then I code > up a ReloadAction that can call my Listener to reload them all. I've > found this useful so I don't have to restart the app if data changes. > > Matt > If I have edit screens for the drop-downs, I'll replace the List in > application scope after saving. If the application scope has been used to store the drop-down values, how will you handle the updates on data in application scope in clustered environment? Is there any way to get rid of the problem? Anil. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005 12:39 PM, Dave Newton <[EMAIL PROTECTED]> wrote: > Craig McClanahan wrote: > > >On Apr 8, 2005 11:28 AM, Dave Newton <[EMAIL PROTECTED]> wrote: > > > > > >>I haven't done much (anything?) with servlet listeners--what's the > >>advantage to doing it this way as opposed to a servlet.init that loads > >>on app startup? Generally what we've done is to have a thread that > >>checks a flag that signals DB changes that then calls the same code to > >>reload everything. I'm not too involved with that part of the code though. > >> > >The servlet container is *not* required to leave your load-on-startup > >servlet loaded for the entire duration of the webapp's lifetime > >(although, in practice, most containers do). For example, the > >container could unload a servlet that it sees isn't being used, or if > >it has memory contention issues, or for whatever reason is desired. > > > > > If the servlet is just putting objects into application scope does this > matter? > > We weren't using the same servlet to reload that app-scoped data (don't > ask; I don't know) but even if we were, would the only penalty be time? > IOW, the servlet isn't "gone forever," right? > The previous servlet instance is indeed "gone forever", but anything that it has placed into servlet context attributes is still around. That being said, I have seen cases where the potential performance penalty is quite large (many seconds of database access), which will show up in one of your users waiting an abnormally long time for their response -- not something I would find very appealling. > >A ServletContextListener, on the other hand, guarantees that > >contextInitialized() will get called at startup time (before any > >requests have been processed), and contextDestroyed() will get called > >at shutdown time (after the last request), no matter what happens in > >between. > > > > > I think I'll move all this stuff over to there anyway; that sounds much > cleaner. > Yep -- it's definitely cleaner. > Thanks! > > Dave > > Craig - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
Craig McClanahan wrote: On Apr 8, 2005 11:28 AM, Dave Newton <[EMAIL PROTECTED]> wrote: I haven't done much (anything?) with servlet listeners--what's the advantage to doing it this way as opposed to a servlet.init that loads on app startup? Generally what we've done is to have a thread that checks a flag that signals DB changes that then calls the same code to reload everything. I'm not too involved with that part of the code though. The servlet container is *not* required to leave your load-on-startup servlet loaded for the entire duration of the webapp's lifetime (although, in practice, most containers do). For example, the container could unload a servlet that it sees isn't being used, or if it has memory contention issues, or for whatever reason is desired. If the servlet is just putting objects into application scope does this matter? We weren't using the same servlet to reload that app-scoped data (don't ask; I don't know) but even if we were, would the only penalty be time? IOW, the servlet isn't "gone forever," right? A ServletContextListener, on the other hand, guarantees that contextInitialized() will get called at startup time (before any requests have been processed), and contextDestroyed() will get called at shutdown time (after the last request), no matter what happens in between. I think I'll move all this stuff over to there anyway; that sounds much cleaner. Thanks! Dave
Re: Meta Information in Action Form
On Apr 8, 2005 12:15 PM, Matt Raible <[EMAIL PROTECTED]> wrote: > > On Apr 8, 2005, at 1:00 PM, Christine Huang wrote: > > > On Apr 8, 2005 1:40 PM, Craig McClanahan <[EMAIL PROTECTED]> wrote: > >> > >> The servlet container is *not* required to leave your load-on-startup > >> servlet loaded for the entire duration of the webapp's lifetime > >> (although, in practice, most containers do). For example, the > >> container could unload a servlet that it sees isn't being used, or if > >> it has memory contention issues, or for whatever reason is desired. > >> > >> Of course, if you're talking about ActionServlet, it will get reloaded > >> again on the next request, but that will cause your init() method to > >> run again -- wasting a whole bunch of time in many cases. > >> > >> A ServletContextListener, on the other hand, guarantees that > >> contextInitialized() will get called at startup time (before any > >> requests have been processed), and contextDestroyed() will get called > >> at shutdown time (after the last request), no matter what happens in > >> between. > >> > >> Craig > >> > > > > Craig, > > > > Thanks for the information about ServletContextListener. But I wonder > > what you do to reload updated data from database without restarting > > using ServletContextListener. Have another action to call it reload() > > like Matt Riable said? > > Just in case you're interested in some code: > > StartupListener: http://tinyurl.com/3wvk9 > ReloadAction: http://tinyurl.com/6webx > > Note that my StartupListener extends Spring's ContextLoaderListener. > This is because servlet 2.3 containers do not guarantee listener order > initialization. If you're using Spring, I recommend this approach. If > not, you don't need to extend anything. > Actually, both 2.3 and 2.4 are quite specfic about calling order -- see SRV.10.3.3 (startup calls in the order of registration, which means the order of listing in web.xml) and SRV.10.3.4 (shutdown calls in reverse order of presentation). Nothing wrong with what Matt suggests, but it shouldn't be necessary in a compliant container. (AFAICR, Tomcat 4.x and 5.x have always done this in the order described above.) > Matt Craig - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005, at 1:00 PM, Christine Huang wrote: On Apr 8, 2005 1:40 PM, Craig McClanahan <[EMAIL PROTECTED]> wrote: The servlet container is *not* required to leave your load-on-startup servlet loaded for the entire duration of the webapp's lifetime (although, in practice, most containers do). For example, the container could unload a servlet that it sees isn't being used, or if it has memory contention issues, or for whatever reason is desired. Of course, if you're talking about ActionServlet, it will get reloaded again on the next request, but that will cause your init() method to run again -- wasting a whole bunch of time in many cases. A ServletContextListener, on the other hand, guarantees that contextInitialized() will get called at startup time (before any requests have been processed), and contextDestroyed() will get called at shutdown time (after the last request), no matter what happens in between. Craig Craig, Thanks for the information about ServletContextListener. But I wonder what you do to reload updated data from database without restarting using ServletContextListener. Have another action to call it reload() like Matt Riable said? Just in case you're interested in some code: StartupListener: http://tinyurl.com/3wvk9 ReloadAction: http://tinyurl.com/6webx Note that my StartupListener extends Spring's ContextLoaderListener. This is because servlet 2.3 containers do not guarantee listener order initialization. If you're using Spring, I recommend this approach. If not, you don't need to extend anything. Matt - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005 11:50 AM, Jay Burgess <[EMAIL PROTECTED]> wrote: > We too use a PlugIn, and I'm now wondering based on Craig's explanation > whether > there are any advantages/disadvantages of one technique over the other? Struts PlugIns are initialized and destroyed by the ActionServlet.init and ActionServlet.destroy methods, so they are (of course) subject to the same potential problems. If you're on a Servlet 2.3 or later container, I would recommend migrating your plugins to use ServletContextListener instead. It's really easy -- just tweak the method signature of the two relevant methods. You have access to the ServletContext for the application (it's in the event parameter), so it's easy to do things like set up application scope caches for your domain tables. Craig > > Jay > Vertical Technology Group > http://www.vtgroup.com/ > > > -Original Message- > From: Joe Germuska [mailto:[EMAIL PROTECTED] > Sent: Friday, April 08, 2005 2:35 PM > To: Struts Users Mailing List > Subject: Re: Meta Information in Action Form > > Matt's general approach is the one we use also, except instead of > ServletListeners and the database, we use the DigestingPlugIn, which > produces objects based on XML and can put them in the application > context. There's an example in the mailreader app which you should > be able to just about cut-and-paste, with the exception of changing > the XML which represents your menu items. > > Joe > > At 12:12 PM -0600 4/8/05, Matt Raible wrote: > >As far as drop-downs, I typically populate all (or most) of mine > >from a database at application startup using a ServletListener. I > >stuff these into the application scope as Lists of LabelValue beans. > >Then I code up a ReloadAction that can call my Listener to reload > >them all. I've found this useful so I don't have to restart the app > >if data changes. > >If I have edit screens for the drop-downs, I'll replace the List in > >application scope after saving. > > -- > Joe Germuska > [EMAIL PROTECTED] > http://blog.germuska.com > "Narrow minds are weapons made for mass destruction" -The Ex > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005 1:40 PM, Craig McClanahan <[EMAIL PROTECTED]> wrote: > > The servlet container is *not* required to leave your load-on-startup > servlet loaded for the entire duration of the webapp's lifetime > (although, in practice, most containers do). For example, the > container could unload a servlet that it sees isn't being used, or if > it has memory contention issues, or for whatever reason is desired. > > Of course, if you're talking about ActionServlet, it will get reloaded > again on the next request, but that will cause your init() method to > run again -- wasting a whole bunch of time in many cases. > > A ServletContextListener, on the other hand, guarantees that > contextInitialized() will get called at startup time (before any > requests have been processed), and contextDestroyed() will get called > at shutdown time (after the last request), no matter what happens in > between. > > Craig > Craig, Thanks for the information about ServletContextListener. But I wonder what you do to reload updated data from database without restarting using ServletContextListener. Have another action to call it reload() like Matt Riable said? Christine - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Meta Information in Action Form
We too use a PlugIn, and I'm now wondering based on Craig's explanation whether there are any advantages/disadvantages of one technique over the other? Jay Vertical Technology Group http://www.vtgroup.com/ -Original Message- From: Joe Germuska [mailto:[EMAIL PROTECTED] Sent: Friday, April 08, 2005 2:35 PM To: Struts Users Mailing List Subject: Re: Meta Information in Action Form Matt's general approach is the one we use also, except instead of ServletListeners and the database, we use the DigestingPlugIn, which produces objects based on XML and can put them in the application context. There's an example in the mailreader app which you should be able to just about cut-and-paste, with the exception of changing the XML which represents your menu items. Joe At 12:12 PM -0600 4/8/05, Matt Raible wrote: >As far as drop-downs, I typically populate all (or most) of mine >from a database at application startup using a ServletListener. I >stuff these into the application scope as Lists of LabelValue beans. >Then I code up a ReloadAction that can call my Listener to reload >them all. I've found this useful so I don't have to restart the app >if data changes. >If I have edit screens for the drop-downs, I'll replace the List in >application scope after saving. -- Joe Germuska [EMAIL PROTECTED] http://blog.germuska.com "Narrow minds are weapons made for mass destruction" -The Ex - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
Matt's general approach is the one we use also, except instead of ServletListeners and the database, we use the DigestingPlugIn, which produces objects based on XML and can put them in the application context. There's an example in the mailreader app which you should be able to just about cut-and-paste, with the exception of changing the XML which represents your menu items. Joe At 12:12 PM -0600 4/8/05, Matt Raible wrote: As far as drop-downs, I typically populate all (or most) of mine from a database at application startup using a ServletListener. I stuff these into the application scope as Lists of LabelValue beans. Then I code up a ReloadAction that can call my Listener to reload them all. I've found this useful so I don't have to restart the app if data changes. If I have edit screens for the drop-downs, I'll replace the List in application scope after saving. -- Joe Germuska [EMAIL PROTECTED] http://blog.germuska.com "Narrow minds are weapons made for mass destruction" -The Ex - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
On Apr 8, 2005 11:28 AM, Dave Newton <[EMAIL PROTECTED]> wrote: > Matt Raible wrote: > > > As far as drop-downs, I typically populate all (or most) of mine from > > a database at application startup using a ServletListener. I stuff > > these into the application scope as Lists of LabelValue beans. Then > > I code up a ReloadAction that can call my Listener to reload them > > all. I've found this useful so I don't have to restart the app if > > data changes. If I have edit screens for the drop-downs, I'll > > replace the List in application scope after saving. > > I haven't done much (anything?) with servlet listeners--what's the > advantage to doing it this way as opposed to a servlet.init that loads > on app startup? Generally what we've done is to have a thread that > checks a flag that signals DB changes that then calls the same code to > reload everything. I'm not too involved with that part of the code though. > The servlet container is *not* required to leave your load-on-startup servlet loaded for the entire duration of the webapp's lifetime (although, in practice, most containers do). For example, the container could unload a servlet that it sees isn't being used, or if it has memory contention issues, or for whatever reason is desired. Of course, if you're talking about ActionServlet, it will get reloaded again on the next request, but that will cause your init() method to run again -- wasting a whole bunch of time in many cases. A ServletContextListener, on the other hand, guarantees that contextInitialized() will get called at startup time (before any requests have been processed), and contextDestroyed() will get called at shutdown time (after the last request), no matter what happens in between. Craig > (We store a LOT of information in the DB as we do not have access to the > production servers. The more we keep in the DB the better off we are. I > even keep some Jython scripts in there and almost had them convinced to > keep classes, but sanity prevailed :) > > Dave > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
Matt Raible wrote: As far as drop-downs, I typically populate all (or most) of mine from a database at application startup using a ServletListener. I stuff these into the application scope as Lists of LabelValue beans. Then I code up a ReloadAction that can call my Listener to reload them all. I've found this useful so I don't have to restart the app if data changes. If I have edit screens for the drop-downs, I'll replace the List in application scope after saving. I haven't done much (anything?) with servlet listeners--what's the advantage to doing it this way as opposed to a servlet.init that loads on app startup? Generally what we've done is to have a thread that checks a flag that signals DB changes that then calls the same code to reload everything. I'm not too involved with that part of the code though. (We store a LOT of information in the DB as we do not have access to the production servers. The more we keep in the DB the better off we are. I even keep some Jython scripts in there and almost had them convinced to keep classes, but sanity prevailed :) Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
As far as drop-downs, I typically populate all (or most) of mine from a database at application startup using a ServletListener. I stuff these into the application scope as Lists of LabelValue beans. Then I code up a ReloadAction that can call my Listener to reload them all. I've found this useful so I don't have to restart the app if data changes. If I have edit screens for the drop-downs, I'll replace the List in application scope after saving. Matt On Apr 8, 2005, at 12:03 PM, Christine Huang wrote: If those drop-down values are not dynamic, I would use a application scope bean. If it is dynamic, like credit card profiles in a dropdown list for a particular user, I will declare it as ActionForm property. I would like to hear about other people's solution. Christine On Apr 8, 2005 12:18 PM, Anil <[EMAIL PROTECTED]> wrote: Leon Rosenberg anotheria.net> writes: Sorry, but what exactly do you mean with meta information? Leon -Ursprüngliche Nachricht- Von: news [mailto:news sea.gmane.org] Im Auftrag von Anil Gesendet: Freitag, 8. April 2005 02:34 An: user struts.apache.org Betreff: Meta Information in Action Form Hi All, Is it good approach to keep the meta information in action form ? Thanks in advance. Regards, Anil. - To unsubscribe, e-mail: user-unsubscribe struts.apache.org For additional commands, e-mail: user-help struts.apache.org Hi Leon, Thanks for the reply. Meta information is like drop-down values that are being shown in a JSP page. In my case, this data should be fetched from database. Before going to the JSP page, I have to make sure that the drop-down values exist somewhere in scope. Here my question is, Is it ok to keep this kind of information in Action Form? Thanks, Anil. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
If those drop-down values are not dynamic, I would use a application scope bean. If it is dynamic, like credit card profiles in a dropdown list for a particular user, I will declare it as ActionForm property. I would like to hear about other people's solution. Christine On Apr 8, 2005 12:18 PM, Anil <[EMAIL PROTECTED]> wrote: > > > Leon Rosenberg anotheria.net> writes: > > > > > Sorry, but what exactly do you mean with meta information? > > > > Leon > > > > > -Ursprüngliche Nachricht- > > > Von: news [mailto:news sea.gmane.org] Im Auftrag von Anil > > > Gesendet: Freitag, 8. April 2005 02:34 > > > An: user struts.apache.org > > > Betreff: Meta Information in Action Form > > > > > > > > > Hi All, > > > > > > Is it good approach to keep the meta information in action form ? > > > > > > Thanks in advance. > > > > > > Regards, > > > Anil. > > > > > > > > > - > > > To unsubscribe, e-mail: user-unsubscribe struts.apache.org > > > For additional commands, e-mail: user-help struts.apache.org > > > > > > > > > > Hi Leon, > > Thanks for the reply. Meta information is like drop-down values that are being > shown in a JSP page. In my case, this data should be fetched from database. > Before going to the JSP page, I have to make sure that the drop-down values > exist somewhere in scope. Here my question is, Is it ok to keep this kind of > information in Action Form? > > Thanks, > Anil. > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Meta Information in Action Form
Leon Rosenberg anotheria.net> writes: > > Sorry, but what exactly do you mean with meta information? > > Leon > > > -UrsprÃngliche Nachricht- > > Von: news [mailto:news sea.gmane.org] Im Auftrag von Anil > > Gesendet: Freitag, 8. April 2005 02:34 > > An: user struts.apache.org > > Betreff: Meta Information in Action Form > > > > > > Hi All, > > > > Is it good approach to keep the meta information in action form ? > > > > Thanks in advance. > > > > Regards, > > Anil. > > > > > > - > > To unsubscribe, e-mail: user-unsubscribe struts.apache.org > > For additional commands, e-mail: user-help struts.apache.org > > > > > Hi Leon, Thanks for the reply. Meta information is like drop-down values that are being shown in a JSP page. In my case, this data should be fetched from database. Before going to the JSP page, I have to make sure that the drop-down values exist somewhere in scope. Here my question is, Is it ok to keep this kind of information in Action Form? Thanks, Anil. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: session expiration issue and tiles
sudip shrestha wrote:
--
I have few layout.jsp templates where I have following chuck of code
which should redirect the browser to login page if session expires:
<% String loginCheck = "notLoggedIn";
if( session.getAttribute( "session_unique_id" )!=null )
{
loginCheck = (String)session.getAttribute( "session_unique_id"
);
}
if( !loginCheck.equals("admin0") )
{
%>
<% }
%>
But when session expires, or when somebody who is not 'admin0' tries
to access the page, they get a blank page instead of getting
redirection. I have tried using jsp:forward directive as well, but
the result is same.
If anybody has any suggestion on this, please let me know.
Put this logic somewhere else like a filter or request processor.
Not knowing the full layout of your tiles I'd say that you've probably
already output to the HTTP connection, which means you can't redirect
anymore. Just a guess. In any case this is handled _far_ better some
place other than the presentation layer, especially if you have the same
code in more than one place--sketchy.
Dave
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RE: [OT] How to transpose a table in MS SQL Server 2000
Assuming that month, val1 & val2 are the *names* of columns this is going to be a tricky problem to solve with just SQL. You need to query the system tables to extract the names of the columns. The other problem is that the number of columns in your result set needs to vary depending on the number of rows in your source data. The only way I could solve this would be procedurally using TransactSQL (create a temp table, populate it & select from it). Paul > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > Sent: 08 April 2005 16:12 > To: Struts Users Mailing List > Subject: RE: [OT] How to transpose a table in MS SQL Server 2000 > > > id/ID are synthetic keys and can be ignored (as well as > 'total'). So, the > simplified case is: > > source_table > - > month val1val2 > jan 1 2 > feb 3 4 > > target_target > - > VAL COL1COL2 > month jan feb > val11 3 > val22 4 > > Thanks, > Dennis > > > > > > Paul McCulloch <[EMAIL PROTECTED]> > 04/08/2005 10:47 AM > Please respond to > "Struts Users Mailing List" > > > To > 'Struts Users Mailing List' > cc > > Subject > RE: [OT] How to transpose a table in MS SQL Server 2000 > > > > > > > I don't 100% understand your tables. Where does ID come from > (the values 1 > & > 2 exist in the first view, but 1,2,3,4 in the second). > > Are the totals derived? > > Give me the SQL for the first view and I'll have a look. > > Paul > > > -Original Message- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] > > Sent: 08 April 2005 14:46 > > To: Struts Users Mailing List > > Subject: [OT] How to transpose a table in MS SQL Server 2000 > > > > > > So, I have the following table: > > > > id month val1val2total > > 1 jan 1 2 3 > > 2 feb 3 4 7 > > > > And I'd like it transformed to: > > > > ID VAL COL1COL2 > > 1 month jan feb > > 2 val11 3 > > 3 val22 4 > > 4 total 3 7 > > > > I'm guessing that it's possible, as I've seen variants of > > this type of > > tranformation. I have googled this, but the solutions (I've > > found) are > > considerably more complicated and revolve around > > summing/aggregating, when > > I just need to change the structure of the results. > > > > Has anybody seen a solution that fits this problem? > > > > Thanks, > > Dennis > > > > > > > > > > [EMAIL PROTECTED] > > 04/08/2005 09:26 AM > > Please respond to > > "Struts Users Mailing List" > > > > > > To > > "Struts Users Mailing List" > > cc > > > > Subject > > [OT] RE: concurrency problem > > > > > > > > > > > > > > As I hit the send button, something tickled in the back of my > > mind, and I > > began to remember that the spec forbids thread primitiives on > > bean methods > > > > and that the EJB container is responsible for handling > > concurrent access. > > Sounds like your provider might have a defect. > > > > Dennis > > > > > > > > > > > > [EMAIL PROTECTED] > > 04/08/2005 09:13 AM > > Please respond to > > "Struts Users Mailing List" > > > > > > To > > "Struts Users Mailing List" > > cc > > > > Subject > > RE: concurrency problem > > > > > > > > > > > > > > You're synchronizing on an object which is unique for each > > user, which > > might explain why more than 1 thread can concurrently enter > > the critsec. > > Wouldn't a better solution be to declare the method as synchronized? > > > > Dennis > > > > > > > > > > > > "Kalra, Ashwani" <[EMAIL PROTECTED]> > > 04/08/2005 08:53 AM > > Please respond to > > "Struts Users Mailing List" > > > > > > To > > "Struts Users Mailing List" > > cc > > > > Subject > > RE: concurrency problem > > > > > > > > > > > > > > > > Isnt that valid when request is going to same action. In my > scenario, > > different actions are invoked quickly and all the actions > > have this call > > to SFSB. Which I want to synchronise > > > > Thanks & Regds > > Ashwani > > > > Ext: 1860 > > > > > > > > > > > > > > > > > -Original Message- > > > From: James Mitchell [mailto:[EMAIL PROTECTED] > > > Sent: Friday, April 08, 2005 6:04 PM > > > To: Struts Users Mailing List > > > Subject: Re: concurrency problem > > > > > > > > > > > > > You'd be better off implementing token processing. > > > > > > > > Struts includes token generation and helper methods to ensure > > > > > only one valid > > > > > request is handled at a time. Look at the struts example > > application > > > > > (mailreader) for an example. > > > > > > > > For detailed info on why this pattern works, see: > > > http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l > > > pr_g_1/102-8250064-5792120?v=glance&s=books > > > > > > > > > > > > > > > >
Re: concurrency problem
Maybe I'm being dense here but:
If every session contains a reference to the bean, and every thread is
synchronizing on their own session;
It would seem that there would not be any concurrency control.
I would think that they all need to sync on the same object.
JC
"Kalra, Ashwani"
<[EMAIL PROTECTED]To: "Struts (E-mail)"
gemini.com> cc:
Subject: concurrency problem
04/08/2005 06:10
AM
Please respond to
"Struts Users
Mailing List"
I am facing concurrency problem in following scenario.
All our action classes call same stateful session bean . Each action class
obtains the reference from HTTPSession object and calls one and only one
business method.
To prevent the concurrent access to this instance which occurs when user
immediately presses two links quickly in succession I am using the
following code block
execute(...) //execute methods of Action class
{
//Obtain the session from Request.User will always be in session here
session=request.getSession()
Synchronised(session)
{
//call ejb's business method.
}
}
However sometimes more than one thread is able to pass through, And I get
exception from Appserver. As 2 threads are not allowed for statefull
Session bean.
Can there be problem in above code. Is it ok to synchronise on session
object.
Thanks & Regds
Ashwani
Ext: 1860
This message contains information that may be privileged or confidential
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RE: [OT] How to transpose a table in MS SQL Server 2000
id/ID are synthetic keys and can be ignored (as well as 'total'). So, the
simplified case is:
source_table
-
month val1val2
jan 1 2
feb 3 4
target_target
-
VAL COL1COL2
month jan feb
val11 3
val22 4
Thanks,
Dennis
Paul McCulloch <[EMAIL PROTECTED]>
04/08/2005 10:47 AM
Please respond to
"Struts Users Mailing List"
To
'Struts Users Mailing List'
cc
Subject
RE: [OT] How to transpose a table in MS SQL Server 2000
I don't 100% understand your tables. Where does ID come from (the values 1
&
2 exist in the first view, but 1,2,3,4 in the second).
Are the totals derived?
Give me the SQL for the first view and I'll have a look.
Paul
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]
> Sent: 08 April 2005 14:46
> To: Struts Users Mailing List
> Subject: [OT] How to transpose a table in MS SQL Server 2000
>
>
> So, I have the following table:
>
> id month val1val2total
> 1 jan 1 2 3
> 2 feb 3 4 7
>
> And I'd like it transformed to:
>
> ID VAL COL1COL2
> 1 month jan feb
> 2 val11 3
> 3 val22 4
> 4 total 3 7
>
> I'm guessing that it's possible, as I've seen variants of
> this type of
> tranformation. I have googled this, but the solutions (I've
> found) are
> considerably more complicated and revolve around
> summing/aggregating, when
> I just need to change the structure of the results.
>
> Has anybody seen a solution that fits this problem?
>
> Thanks,
> Dennis
>
>
>
>
> [EMAIL PROTECTED]
> 04/08/2005 09:26 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> [OT] RE: concurrency problem
>
>
>
>
>
>
> As I hit the send button, something tickled in the back of my
> mind, and I
> began to remember that the spec forbids thread primitiives on
> bean methods
>
> and that the EJB container is responsible for handling
> concurrent access.
> Sounds like your provider might have a defect.
>
> Dennis
>
>
>
>
>
> [EMAIL PROTECTED]
> 04/08/2005 09:13 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> RE: concurrency problem
>
>
>
>
>
>
> You're synchronizing on an object which is unique for each
> user, which
> might explain why more than 1 thread can concurrently enter
> the critsec.
> Wouldn't a better solution be to declare the method as synchronized?
>
> Dennis
>
>
>
>
>
> "Kalra, Ashwani" <[EMAIL PROTECTED]>
> 04/08/2005 08:53 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> RE: concurrency problem
>
>
>
>
>
>
>
> Isnt that valid when request is going to same action. In my scenario,
> different actions are invoked quickly and all the actions
> have this call
> to SFSB. Which I want to synchronise
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> > -Original Message-
> > From: James Mitchell [mailto:[EMAIL PROTECTED]
> > Sent: Friday, April 08, 2005 6:04 PM
> > To: Struts Users Mailing List
> > Subject: Re: concurrency problem
> >
>
> >
>
> > You'd be better off implementing token processing.
> >
>
> > Struts includes token generation and helper methods to ensure
>
> > only one valid
>
> > request is handled at a time. Look at the struts example
> application
>
> > (mailreader) for an example.
> >
>
> > For detailed info on why this pattern works, see:
> > http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> > pr_g_1/102-8250064-5792120?v=glance&s=books
> >
>
> >
>
> >
>
> >
>
> > --
> > James Mitchell
> > Software Engineer / Open Source Evangelist
> > Consulting / Mentoring / Freelance
> > EdgeTech, Inc.
> > 678.910.8017
> > AIM: jmitchtx
> > Yahoo: jmitchtx
> > MSN: [EMAIL PROTECTED]
> >
>
> >
>
> >
>
> >
>
> > - Original Message -
>
> > From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> > To: "Struts (E-mail)"
> > Sent: Friday, April 08, 2005 7:10 AM
> > Subject: concurrency problem
> >
>
> >
>
> >
>
> > I am facing concurrency problem in following scenario.
> >
>
> > All our action classes call same stateful session bean .
>
> > Each action class
>
> > obtains the reference from HTTPSession object and calls one
>
> > and only one
>
> > business method.
> > To prevent the concurrent access to this instance which
>
> > occurs when user
>
> > immediately presses two links quickly in succession I am
>
> > using the following
>
> > code block
> >
>
> >
>
> > execute(...) //execute methods of Action class
> > {
> >
> >
> >
>
> > //Obtain the session from Request.User will always be in
> session here
> > session=request.getSession()
>
RE: [OT] How to transpose a table in MS SQL Server 2000
I don't 100% understand your tables. Where does ID come from (the values 1 &
2 exist in the first view, but 1,2,3,4 in the second).
Are the totals derived?
Give me the SQL for the first view and I'll have a look.
Paul
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]
> Sent: 08 April 2005 14:46
> To: Struts Users Mailing List
> Subject: [OT] How to transpose a table in MS SQL Server 2000
>
>
> So, I have the following table:
>
> id month val1val2total
> 1 jan 1 2 3
> 2 feb 3 4 7
>
> And I'd like it transformed to:
>
> ID VAL COL1COL2
> 1 month jan feb
> 2 val11 3
> 3 val22 4
> 4 total 3 7
>
> I'm guessing that it's possible, as I've seen variants of
> this type of
> tranformation. I have googled this, but the solutions (I've
> found) are
> considerably more complicated and revolve around
> summing/aggregating, when
> I just need to change the structure of the results.
>
> Has anybody seen a solution that fits this problem?
>
> Thanks,
> Dennis
>
>
>
>
> [EMAIL PROTECTED]
> 04/08/2005 09:26 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> [OT] RE: concurrency problem
>
>
>
>
>
>
> As I hit the send button, something tickled in the back of my
> mind, and I
> began to remember that the spec forbids thread primitiives on
> bean methods
>
> and that the EJB container is responsible for handling
> concurrent access.
> Sounds like your provider might have a defect.
>
> Dennis
>
>
>
>
>
> [EMAIL PROTECTED]
> 04/08/2005 09:13 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> RE: concurrency problem
>
>
>
>
>
>
> You're synchronizing on an object which is unique for each
> user, which
> might explain why more than 1 thread can concurrently enter
> the critsec.
> Wouldn't a better solution be to declare the method as synchronized?
>
> Dennis
>
>
>
>
>
> "Kalra, Ashwani" <[EMAIL PROTECTED]>
> 04/08/2005 08:53 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> RE: concurrency problem
>
>
>
>
>
>
>
> Isnt that valid when request is going to same action. In my scenario,
> different actions are invoked quickly and all the actions
> have this call
> to SFSB. Which I want to synchronise
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> > -Original Message-
> > From: James Mitchell [mailto:[EMAIL PROTECTED]
> > Sent: Friday, April 08, 2005 6:04 PM
> > To: Struts Users Mailing List
> > Subject: Re: concurrency problem
> >
>
> >
>
> > You'd be better off implementing token processing.
> >
>
> > Struts includes token generation and helper methods to ensure
>
> > only one valid
>
> > request is handled at a time. Look at the struts example
> application
>
> > (mailreader) for an example.
> >
>
> > For detailed info on why this pattern works, see:
> > http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> > pr_g_1/102-8250064-5792120?v=glance&s=books
> >
>
> >
>
> >
>
> >
>
> > --
> > James Mitchell
> > Software Engineer / Open Source Evangelist
> > Consulting / Mentoring / Freelance
> > EdgeTech, Inc.
> > 678.910.8017
> > AIM: jmitchtx
> > Yahoo: jmitchtx
> > MSN: [EMAIL PROTECTED]
> >
>
> >
>
> >
>
> >
>
> > - Original Message -
>
> > From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> > To: "Struts (E-mail)"
> > Sent: Friday, April 08, 2005 7:10 AM
> > Subject: concurrency problem
> >
>
> >
>
> >
>
> > I am facing concurrency problem in following scenario.
> >
>
> > All our action classes call same stateful session bean .
>
> > Each action class
>
> > obtains the reference from HTTPSession object and calls one
>
> > and only one
>
> > business method.
> > To prevent the concurrent access to this instance which
>
> > occurs when user
>
> > immediately presses two links quickly in succession I am
>
> > using the following
>
> > code block
> >
>
> >
>
> > execute(...) //execute methods of Action class
> > {
> >
> >
> >
>
> > //Obtain the session from Request.User will always be in
> session here
> > session=request.getSession()
> > Synchronised(session)
> > {
> > //call ejb's business method.
> > }
> >
>
> > }
> >
>
> > However sometimes more than one thread is able to pass
>
> > through, And I get
>
> > exception from Appserver. As 2 threads are not allowed for
>
> > statefull Session
>
> > bean.
> > Can there be problem in above code. Is it ok to synchronise
>
> > on session
>
> > object.
> >
>
> >
>
> >
>
> >
>
> >
>
> > Thanks & Regds
> > Ashwani
> >
>
> > Ext: 1860
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > This message contains information that may be privileged or
>
> > conf
Re: Authorized Site Creation With Struts
Scott. I have architectured an application a little over a year ago... And opted to use a filter to handle logic before getting into the Struts portion of the application. At first... I was unsure if this was the best way to go... but today I am sure glad I did so. The users started making riduculous demands... since they have the stash of money it is hard to tell them they are crazy! As an example, they wanted the application to update a database (another system) with the requested pages... plus with some detailed information. This was not availble in the standard log files. Since this was not the goal of the application but an external user request (dumb one) I simply used the HTTP Client to fire off a post to a page and don't really care what happens afterwards. The filter gave me an incredibly efficient option to handle changes without affecting the application logic at all. SInce then I have had other twisted requests! Finally, if ever I need to remove this feature... it can be done in 5 minutes! - Glenn "Scott Purcell" <[EMAIL PROTECTED]> 08/04/2005 10:28 AM Please respond to "Struts Users Mailing List" To: cc: (bcc: Glenn Deschenes/NAT/CMHC-SCHL/CA) Subject:Authorized Site Creation With Struts Classification: Hello, First off, I am having trouble with creating a more elegant solution to a proboem. A- Problem, I have a site that requires authentication (form-based) when they hit our site. Upon building the site which requires an "AppObject" and "UserObject", I subclassed the RequestProcessor, and put in logic to ensure that both objects existed. This works good. Next, I needed to find out when a user's session expired. Upon further investigation, I subclassed an Action class and added a new executeAction(signature) that pulled in the AppObject and UserObject that were in the session from the Request Processor. I then checked if the UserObject had a logged-in flag. If so, great, they can work, else I would throw them to the front door and create a ActionMessage that says "Session Expired". All of this works, and does its job. Problem is now, I am not happy with my creation. It screwed with my ability to use DispatchAction and LookupDispatchAction. Two things I wasn't sure I would need when I began. Anyway, I have searched and searched, and was hoping someone may have a better way to handle this session-management possibly all in the RequestProcesor? The problem I am finding, is that I create new UserObject and AppObject each time someone comes through, because I do not know if they are new or returning users. It is not until they are looking for an inside page, that I am aware they are not valid. Does this make sense? I figured a lot of you out there may have this same type of secure site. Any ideas? Thanks, Scott K Purcell
RE: Authorized Site Creation With Struts
The two approaches I have succesfully used are container managed authentication & Filters. Filters are simpler & more flexible than container managed authentication, so unless you need a particular feature of CMA (e.g. automatic propogation of credentials to EJBs) I wouldn't recommend it. I believe, though I haven't used it, that there is a free package called SecurityFilter which does lots of cools things for you. Paul > -Original Message- > From: Scott Purcell [mailto:[EMAIL PROTECTED] > Sent: 08 April 2005 15:28 > To: user@struts.apache.org > Subject: Authorized Site Creation With Struts > > > Hello, > First off, I am having trouble with creating a more elegant > solution to a proboem. > > A- Problem, I have a site that requires authentication > (form-based) when they hit our site. > Upon building the site which requires an "AppObject" and > "UserObject", I subclassed the > RequestProcessor, and put in logic to ensure that both > objects existed. > > This works good. > >Next, I needed to find out when a user's session expired. > Upon further investigation, >I subclassed an Action class and added a new > executeAction(signature) that pulled in >the AppObject and UserObject that were in the session from > the Request Processor. > > I then checked if the UserObject had a logged-in flag. If > so, great, they can work, else > I would throw them to the front door and create a > ActionMessage that says "Session Expired". > > All of this works, and does its job. Problem is now, I am not > happy with my creation. It screwed with my ability to use > DispatchAction and LookupDispatchAction. Two things I wasn't > sure I would need when I began. > > Anyway, I have searched and searched, and was hoping someone > may have a better way to handle > this session-management possibly all in the RequestProcesor? > > The problem I am finding, is that I create new UserObject and > AppObject each time someone comes through, because I do not > know if they > are new or returning users. It is not until they are looking > for an inside page, that I am aware they are not valid. > > Does this make sense? I figured a lot of you out there may > have this same type of secure site. Any ideas? > > Thanks, > > Scott K Purcell > > > > > > Axios Email Confidentiality Footer Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message, and notify us immediately. If you or your employer does not consent to Internet email messages of this kind, please advise us immediately. Opinions, conclusions and other information expressed in this message are not given or endorsed by my Company or employer unless otherwise indicated by an authorised representative independent of this message. WARNING: While Axios Systems Ltd takes steps to prevent computer viruses from being transmitted via electronic mail attachments we cannot guarantee that attachments do not contain computer virus code. You are therefore strongly advised to undertake anti virus checks prior to accessing the attachment to this electronic mail. Axios Systems Ltd grants no warranties regarding performance use or quality of any attachment and undertakes no liability for loss or damage howsoever caused. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] RE: concurrency problem
No, I am getting appropriate exception from app server. Here is the exception.
I want to avoid it and synchronize the request. But synchronisation is not
working some how. Here is what my app server gives exception
com.evermind.server.rmi.OrionRemoteException: Second thread call to stateful
session bean at
com.evermind.server.ejb.AbstractEJBObject.startCall(AbstractEJBObject.java:138)
I want to avoid this.
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]
> Sent: Friday, April 08, 2005 6:57 PM
> To: Struts Users Mailing List
> Subject: [OT] RE: concurrency problem
>
>
> As I hit the send button, something tickled in the back of my
> mind, and I
> began to remember that the spec forbids thread primitiives on
> bean methods
> and that the EJB container is responsible for handling
> concurrent access.
> Sounds like your provider might have a defect.
>
> Dennis
>
>
>
>
>
> [EMAIL PROTECTED]
> 04/08/2005 09:13 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> RE: concurrency problem
>
>
>
>
>
>
> You're synchronizing on an object which is unique for each
> user, which
> might explain why more than 1 thread can concurrently enter
> the critsec.
> Wouldn't a better solution be to declare the method as synchronized?
>
> Dennis
>
>
>
>
>
> "Kalra, Ashwani" <[EMAIL PROTECTED]>
> 04/08/2005 08:53 AM
> Please respond to
> "Struts Users Mailing List"
>
>
> To
> "Struts Users Mailing List"
> cc
>
> Subject
> RE: concurrency problem
>
>
>
>
>
>
>
> Isnt that valid when request is going to same action. In my scenario,
> different actions are invoked quickly and all the actions
> have this call
> to SFSB. Which I want to synchronise
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> > -Original Message-
> > From: James Mitchell [mailto:[EMAIL PROTECTED]
> > Sent: Friday, April 08, 2005 6:04 PM
> > To: Struts Users Mailing List
> > Subject: Re: concurrency problem
> >
>
> >
>
> > You'd be better off implementing token processing.
> >
>
> > Struts includes token generation and helper methods to ensure
>
> > only one valid
>
> > request is handled at a time. Look at the struts example
> application
>
> > (mailreader) for an example.
> >
>
> > For detailed info on why this pattern works, see:
> > http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> > pr_g_1/102-8250064-5792120?v=glance&s=books
> >
>
> >
>
> >
>
> >
>
> > --
> > James Mitchell
> > Software Engineer / Open Source Evangelist
> > Consulting / Mentoring / Freelance
> > EdgeTech, Inc.
> > 678.910.8017
> > AIM: jmitchtx
> > Yahoo: jmitchtx
> > MSN: [EMAIL PROTECTED]
> >
>
> >
>
> >
>
> >
>
> > - Original Message -
>
> > From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> > To: "Struts (E-mail)"
> > Sent: Friday, April 08, 2005 7:10 AM
> > Subject: concurrency problem
> >
>
> >
>
> >
>
> > I am facing concurrency problem in following scenario.
> >
>
> > All our action classes call same stateful session bean .
>
> > Each action class
>
> > obtains the reference from HTTPSession object and calls one
>
> > and only one
>
> > business method.
> > To prevent the concurrent access to this instance which
>
> > occurs when user
>
> > immediately presses two links quickly in succession I am
>
> > using the following
>
> > code block
> >
>
> >
>
> > execute(...) //execute methods of Action class
> > {
> >
> >
> >
>
> > //Obtain the session from Request.User will always be in
> session here
> > session=request.getSession()
> > Synchronised(session)
> > {
> > //call ejb's business method.
> > }
> >
>
> > }
> >
>
> > However sometimes more than one thread is able to pass
>
> > through, And I get
>
> > exception from Appserver. As 2 threads are not allowed for
>
> > statefull Session
>
> > bean.
> > Can there be problem in above code. Is it ok to synchronise
>
> > on session
>
> > object.
> >
>
> >
>
> >
>
> >
>
> >
>
> > Thanks & Regds
> > Ashwani
> >
>
> > Ext: 1860
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > This message contains information that may be privileged or
>
> > confidential and
>
> > is the property of the Capgemini Group. It is intended only
>
> > for the person
>
> > to whom it is addressed. If you are not the intended
>
> > recipient, you are not
>
> > authorized to read, print, retain, copy, disseminate,
>
> > distribute, or use
>
> > this message or any part thereof. If you receive this
>
> > message in error,
>
> > please notify the sender immediately and delete all copies
>
> > of this message.
> >
>
> >
>
> >
>
> >
> -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
>
> >
>
>
> This message contains information that may be privileged or
> confidential
> and is the property of the Capgemini Group. It is intended
> only for the
> person to whom it is addressed. If y
Authorized Site Creation With Struts
Hello, First off, I am having trouble with creating a more elegant solution to a proboem. A- Problem, I have a site that requires authentication (form-based) when they hit our site. Upon building the site which requires an "AppObject" and "UserObject", I subclassed the RequestProcessor, and put in logic to ensure that both objects existed. This works good. Next, I needed to find out when a user's session expired. Upon further investigation, I subclassed an Action class and added a new executeAction(signature) that pulled in the AppObject and UserObject that were in the session from the Request Processor. I then checked if the UserObject had a logged-in flag. If so, great, they can work, else I would throw them to the front door and create a ActionMessage that says "Session Expired". All of this works, and does its job. Problem is now, I am not happy with my creation. It screwed with my ability to use DispatchAction and LookupDispatchAction. Two things I wasn't sure I would need when I began. Anyway, I have searched and searched, and was hoping someone may have a better way to handle this session-management possibly all in the RequestProcesor? The problem I am finding, is that I create new UserObject and AppObject each time someone comes through, because I do not know if they are new or returning users. It is not until they are looking for an inside page, that I am aware they are not valid. Does this make sense? I figured a lot of you out there may have this same type of secure site. Any ideas? Thanks, Scott K Purcell
Re: LazyLists and dynamic forms
Richard Rozema wrote the following on 4/7/2005 5:57 PM: I'm pretty new on struts programming and I've read to avoid using session. The only real reason I see not to use session is that if I stick 2 instances of my search tile in the same page (and I will do so), they will share the same property names in the session. Or do you think they will not overwrite each others values? I've never added two instances of a tile with a form in it into a page, so I'm not sure of the effect. I'm not really sure of the concept of what you are trying to do there. You could be right here, I introduced the indexed properties because the searchForm may contain from 1 to any number of properties to select on depending on the table being searched. Each line in the form contains one property for which the end user may select an operator to build a selection criterium and enter values. But how else will I be able to determine which operator to apply to a property and it's value(s)? or in other words, how do I keep the property name, operator and values of each line grouped together? Sorry, I should have been more clear, I've been using the nested tag so long I forgot that for what you wanted to do you WOLD need indexed properties unlss you did use the nested tag (part of Struts) or simply made the indexed values yourself with JSTL (which is what I opt for when not using the nested tag, only because I'm not sure how indexed works when you end up with deeply nested objects within objects(?)). The nested tag will take care of this cleanly for you. So, for example, if you had a List of Employees (firstName, lastName, and inside each Employee was also a "AddressBean" with street, city,etc) your formBean might just have a settter getter for getEmployees() setEmployees(List employees). Then creating the form.. or if you don't like address.city, address.state you could do... -- Rick - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Open source paginator
Hi http://kulkarni_ash.tripod.com/howto/jsptaglib-howto.html Ashish --- Rick Reumann <[EMAIL PROTECTED]> wrote: > N G wrote the following on 4/7/2005 3:31 PM: > > Does anyone know of some open source paginator > package out there? > > Something generic enough that you could stick > collections into and it > > would paginate it for you based on some criteria > and expose methods to > > nextPage(), previousPage() and stuff like that. > > You can try http://displaytag.sourceforge.net/ I > haven't used it in a > long time though. Looks like a lot of progress on it > since I used it > over a year or two ago. > > -- > Rick > > - > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > __ Do you Yahoo!? Yahoo! Personals - Better first dates. More second dates. http://personals.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
session expiration issue and tiles
Using: Tomcat 5.5.7, Sun JDK 1.5, Struts 1.2.4
--
I have few layout.jsp templates where I have following chuck of code
which should redirect the browser to login page if session expires:
<% String loginCheck = "notLoggedIn";
if( session.getAttribute( "session_unique_id" )!=null )
{
loginCheck = (String)session.getAttribute( "session_unique_id"
);
}
if( !loginCheck.equals("admin0") )
{
%>
<% }
%>
But when session expires, or when somebody who is not 'admin0' tries
to access the page, they get a blank page instead of getting
redirection. I have tried using jsp:forward directive as well, but
the result is same.
If anybody has any suggestion on this, please let me know.
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[OT] How to transpose a table in MS SQL Server 2000
So, I have the following table:
id month val1val2total
1 jan 1 2 3
2 feb 3 4 7
And I'd like it transformed to:
ID VAL COL1COL2
1 month jan feb
2 val11 3
3 val22 4
4 total 3 7
I'm guessing that it's possible, as I've seen variants of this type of
tranformation. I have googled this, but the solutions (I've found) are
considerably more complicated and revolve around summing/aggregating, when
I just need to change the structure of the results.
Has anybody seen a solution that fits this problem?
Thanks,
Dennis
[EMAIL PROTECTED]
04/08/2005 09:26 AM
Please respond to
"Struts Users Mailing List"
To
"Struts Users Mailing List"
cc
Subject
[OT] RE: concurrency problem
As I hit the send button, something tickled in the back of my mind, and I
began to remember that the spec forbids thread primitiives on bean methods
and that the EJB container is responsible for handling concurrent access.
Sounds like your provider might have a defect.
Dennis
[EMAIL PROTECTED]
04/08/2005 09:13 AM
Please respond to
"Struts Users Mailing List"
To
"Struts Users Mailing List"
cc
Subject
RE: concurrency problem
You're synchronizing on an object which is unique for each user, which
might explain why more than 1 thread can concurrently enter the critsec.
Wouldn't a better solution be to declare the method as synchronized?
Dennis
"Kalra, Ashwani" <[EMAIL PROTECTED]>
04/08/2005 08:53 AM
Please respond to
"Struts Users Mailing List"
To
"Struts Users Mailing List"
cc
Subject
RE: concurrency problem
Isnt that valid when request is going to same action. In my scenario,
different actions are invoked quickly and all the actions have this call
to SFSB. Which I want to synchronise
Thanks & Regds
Ashwani
Ext: 1860
> -Original Message-
> From: James Mitchell [mailto:[EMAIL PROTECTED]
> Sent: Friday, April 08, 2005 6:04 PM
> To: Struts Users Mailing List
> Subject: Re: concurrency problem
>
>
> You'd be better off implementing token processing.
>
> Struts includes token generation and helper methods to ensure
> only one valid
> request is handled at a time. Look at the struts example application
> (mailreader) for an example.
>
> For detailed info on why this pattern works, see:
> http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> pr_g_1/102-8250064-5792120?v=glance&s=books
>
>
>
>
> --
> James Mitchell
> Software Engineer / Open Source Evangelist
> Consulting / Mentoring / Freelance
> EdgeTech, Inc.
> 678.910.8017
> AIM: jmitchtx
> Yahoo: jmitchtx
> MSN: [EMAIL PROTECTED]
>
>
>
>
> - Original Message -
> From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> To: "Struts (E-mail)"
> Sent: Friday, April 08, 2005 7:10 AM
> Subject: concurrency problem
>
>
>
> I am facing concurrency problem in following scenario.
>
> All our action classes call same stateful session bean .
> Each action class
> obtains the reference from HTTPSession object and calls one
> and only one
> business method.
> To prevent the concurrent access to this instance which
> occurs when user
> immediately presses two links quickly in succession I am
> using the following
> code block
>
>
> execute(...) //execute methods of Action class
> {
>
>
>
> //Obtain the session from Request.User will always be in session here
> session=request.getSession()
> Synchronised(session)
> {
> //call ejb's business method.
> }
>
> }
>
> However sometimes more than one thread is able to pass
> through, And I get
> exception from Appserver. As 2 threads are not allowed for
> statefull Session
> bean.
> Can there be problem in above code. Is it ok to synchronise
> on session
> object.
>
>
>
>
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> This message contains information that may be privileged or
> confidential and
> is the property of the Capgemini Group. It is intended only
> for the person
> to whom it is addressed. If you are not the intended
> recipient, you are not
> authorized to read, print, retain, copy, disseminate,
> distribute, or use
> this message or any part thereof. If you receive this
> message in error,
> please notify the sender immediately and delete all copies
> of this message.
>
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
This message contains information that may be privileged or confidential
and is the property of the Capgemini Group. It is intended only for the
person to whom it is addressed. If you are not the intended recipient, you
are not authorized to read, print, retain, copy, disseminate, distribute,
or use this message or any part thereof. If you receive this message in
error, please notify t
Re: Nested ActionForm Validation
I think the only way you can have one ActionForm reuse another
ActionForm is to include the second ActionForm as a property of the
first. For example, if you have a standard AddressActionForm that
includes validation rules for street, city, state, postal code, etc.
you can use this as a property in your PersonActionForm and your
CompanyActionForm.
public AddressActionForm getAddress() { return this.addressForm; }
public void setAddress(AddressActionForm newAddress) {
this.addressForm = newAddress; }
Then, in the validate() method in PersonActionForm and
CompanyActionForm, you'll need to call this.addressForm.validate().
-- Jeff
On Apr 8, 2005 6:57 AM, Ciaran Hanley <[EMAIL PROTECTED]> wrote:
> I am trying to reuse ActionForms within an application but I am unsure how
> to deal with validation. What I have at the moment is an ActionForm1 which
> contains a second form ActionForm2. In validation.xml, how do I use the
> validation for ActionForm2 within the ActionForm1 validation? Can I use it
> with something like this -
>
>
>
>
>
>
>
>
>
>
>
> ActionForm2 has its own custom validations which I also need to call when
> submitting the form, can I call them by just using
> getActionForm2.validate(mapping,request) within ActionForm1 validation
> method or how can this be achieved?
>
> Thanks,
>
> Ciaran
>
>
--
Jeff Beal
Webmedx, Inc.
Pittsburgh, PA USA
-
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[OT] RE: concurrency problem
As I hit the send button, something tickled in the back of my mind, and I
began to remember that the spec forbids thread primitiives on bean methods
and that the EJB container is responsible for handling concurrent access.
Sounds like your provider might have a defect.
Dennis
[EMAIL PROTECTED]
04/08/2005 09:13 AM
Please respond to
"Struts Users Mailing List"
To
"Struts Users Mailing List"
cc
Subject
RE: concurrency problem
You're synchronizing on an object which is unique for each user, which
might explain why more than 1 thread can concurrently enter the critsec.
Wouldn't a better solution be to declare the method as synchronized?
Dennis
"Kalra, Ashwani" <[EMAIL PROTECTED]>
04/08/2005 08:53 AM
Please respond to
"Struts Users Mailing List"
To
"Struts Users Mailing List"
cc
Subject
RE: concurrency problem
Isnt that valid when request is going to same action. In my scenario,
different actions are invoked quickly and all the actions have this call
to SFSB. Which I want to synchronise
Thanks & Regds
Ashwani
Ext: 1860
> -Original Message-
> From: James Mitchell [mailto:[EMAIL PROTECTED]
> Sent: Friday, April 08, 2005 6:04 PM
> To: Struts Users Mailing List
> Subject: Re: concurrency problem
>
>
> You'd be better off implementing token processing.
>
> Struts includes token generation and helper methods to ensure
> only one valid
> request is handled at a time. Look at the struts example application
> (mailreader) for an example.
>
> For detailed info on why this pattern works, see:
> http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> pr_g_1/102-8250064-5792120?v=glance&s=books
>
>
>
>
> --
> James Mitchell
> Software Engineer / Open Source Evangelist
> Consulting / Mentoring / Freelance
> EdgeTech, Inc.
> 678.910.8017
> AIM: jmitchtx
> Yahoo: jmitchtx
> MSN: [EMAIL PROTECTED]
>
>
>
>
> - Original Message -
> From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> To: "Struts (E-mail)"
> Sent: Friday, April 08, 2005 7:10 AM
> Subject: concurrency problem
>
>
>
> I am facing concurrency problem in following scenario.
>
> All our action classes call same stateful session bean .
> Each action class
> obtains the reference from HTTPSession object and calls one
> and only one
> business method.
> To prevent the concurrent access to this instance which
> occurs when user
> immediately presses two links quickly in succession I am
> using the following
> code block
>
>
> execute(...) //execute methods of Action class
> {
>
>
>
> //Obtain the session from Request.User will always be in session here
> session=request.getSession()
> Synchronised(session)
> {
> //call ejb's business method.
> }
>
> }
>
> However sometimes more than one thread is able to pass
> through, And I get
> exception from Appserver. As 2 threads are not allowed for
> statefull Session
> bean.
> Can there be problem in above code. Is it ok to synchronise
> on session
> object.
>
>
>
>
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> This message contains information that may be privileged or
> confidential and
> is the property of the Capgemini Group. It is intended only
> for the person
> to whom it is addressed. If you are not the intended
> recipient, you are not
> authorized to read, print, retain, copy, disseminate,
> distribute, or use
> this message or any part thereof. If you receive this
> message in error,
> please notify the sender immediately and delete all copies
> of this message.
>
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
This message contains information that may be privileged or confidential
and is the property of the Capgemini Group. It is intended only for the
person to whom it is addressed. If you are not the intended recipient, you
are not authorized to read, print, retain, copy, disseminate, distribute,
or use this message or any part thereof. If you receive this message in
error, please notify the sender immediately and delete all copies of this
message.
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RE: concurrency problem
You're synchronizing on an object which is unique for each user, which
might explain why more than 1 thread can concurrently enter the critsec.
Wouldn't a better solution be to declare the method as synchronized?
Dennis
"Kalra, Ashwani" <[EMAIL PROTECTED]>
04/08/2005 08:53 AM
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RE: concurrency problem
Isnt that valid when request is going to same action. In my scenario,
different actions are invoked quickly and all the actions have this call
to SFSB. Which I want to synchronise
Thanks & Regds
Ashwani
Ext: 1860
> -Original Message-
> From: James Mitchell [mailto:[EMAIL PROTECTED]
> Sent: Friday, April 08, 2005 6:04 PM
> To: Struts Users Mailing List
> Subject: Re: concurrency problem
>
>
> You'd be better off implementing token processing.
>
> Struts includes token generation and helper methods to ensure
> only one valid
> request is handled at a time. Look at the struts example application
> (mailreader) for an example.
>
> For detailed info on why this pattern works, see:
> http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> pr_g_1/102-8250064-5792120?v=glance&s=books
>
>
>
>
> --
> James Mitchell
> Software Engineer / Open Source Evangelist
> Consulting / Mentoring / Freelance
> EdgeTech, Inc.
> 678.910.8017
> AIM: jmitchtx
> Yahoo: jmitchtx
> MSN: [EMAIL PROTECTED]
>
>
>
>
> - Original Message -
> From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> To: "Struts (E-mail)"
> Sent: Friday, April 08, 2005 7:10 AM
> Subject: concurrency problem
>
>
>
> I am facing concurrency problem in following scenario.
>
> All our action classes call same stateful session bean .
> Each action class
> obtains the reference from HTTPSession object and calls one
> and only one
> business method.
> To prevent the concurrent access to this instance which
> occurs when user
> immediately presses two links quickly in succession I am
> using the following
> code block
>
>
> execute(...) //execute methods of Action class
> {
>
>
>
> //Obtain the session from Request.User will always be in session here
> session=request.getSession()
> Synchronised(session)
> {
> //call ejb's business method.
> }
>
> }
>
> However sometimes more than one thread is able to pass
> through, And I get
> exception from Appserver. As 2 threads are not allowed for
> statefull Session
> bean.
> Can there be problem in above code. Is it ok to synchronise
> on session
> object.
>
>
>
>
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> This message contains information that may be privileged or
> confidential and
> is the property of the Capgemini Group. It is intended only
> for the person
> to whom it is addressed. If you are not the intended
> recipient, you are not
> authorized to read, print, retain, copy, disseminate,
> distribute, or use
> this message or any part thereof. If you receive this
> message in error,
> please notify the sender immediately and delete all copies
> of this message.
>
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
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RE: concurrency problem
Isnt that valid when request is going to same action. In my scenario, different
actions are invoked quickly and all the actions have this call to SFSB. Which
I want to synchronise
Thanks & Regds
Ashwani
Ext: 1860
> -Original Message-
> From: James Mitchell [mailto:[EMAIL PROTECTED]
> Sent: Friday, April 08, 2005 6:04 PM
> To: Struts Users Mailing List
> Subject: Re: concurrency problem
>
>
> You'd be better off implementing token processing.
>
> Struts includes token generation and helper methods to ensure
> only one valid
> request is handled at a time. Look at the struts example application
> (mailreader) for an example.
>
> For detailed info on why this pattern works, see:
> http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=l
> pr_g_1/102-8250064-5792120?v=glance&s=books
>
>
>
>
> --
> James Mitchell
> Software Engineer / Open Source Evangelist
> Consulting / Mentoring / Freelance
> EdgeTech, Inc.
> 678.910.8017
> AIM: jmitchtx
> Yahoo: jmitchtx
> MSN: [EMAIL PROTECTED]
>
>
>
>
> - Original Message -
> From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
> To: "Struts (E-mail)"
> Sent: Friday, April 08, 2005 7:10 AM
> Subject: concurrency problem
>
>
>
> I am facing concurrency problem in following scenario.
>
> All our action classes call same stateful session bean .
> Each action class
> obtains the reference from HTTPSession object and calls one
> and only one
> business method.
> To prevent the concurrent access to this instance which
> occurs when user
> immediately presses two links quickly in succession I am
> using the following
> code block
>
>
> execute(...) //execute methods of Action class
> {
>
>
>
> //Obtain the session from Request.User will always be in session here
> session=request.getSession()
> Synchronised(session)
> {
> //call ejb's business method.
> }
>
> }
>
> However sometimes more than one thread is able to pass
> through, And I get
> exception from Appserver. As 2 threads are not allowed for
> statefull Session
> bean.
> Can there be problem in above code. Is it ok to synchronise
> on session
> object.
>
>
>
>
>
> Thanks & Regds
> Ashwani
>
> Ext: 1860
>
>
>
>
>
>
>
> This message contains information that may be privileged or
> confidential and
> is the property of the Capgemini Group. It is intended only
> for the person
> to whom it is addressed. If you are not the intended
> recipient, you are not
> authorized to read, print, retain, copy, disseminate,
> distribute, or use
> this message or any part thereof. If you receive this
> message in error,
> please notify the sender immediately and delete all copies
> of this message.
>
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
This message contains information that may be privileged or confidential and is
the property of the Capgemini Group. It is intended only for the person to whom
it is addressed. If you are not the intended recipient, you are not authorized
to read, print, retain, copy, disseminate, distribute, or use this message or
any part thereof. If you receive this message in error, please notify the
sender immediately and delete all copies of this message.
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To unsubscribe, e-mail: [EMAIL PROTECTED]
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Re: concurrency problem
You'd be better off implementing token processing.
Struts includes token generation and helper methods to ensure only one valid
request is handled at a time. Look at the struts example application
(mailreader) for an example.
For detailed info on why this pattern works, see:
http://www.amazon.com/exec/obidos/tg/detail/-/0201634988/ref=lpr_g_1/102-8250064-5792120?v=glance&s=books
--
James Mitchell
Software Engineer / Open Source Evangelist
Consulting / Mentoring / Freelance
EdgeTech, Inc.
678.910.8017
AIM: jmitchtx
Yahoo: jmitchtx
MSN: [EMAIL PROTECTED]
- Original Message -
From: "Kalra, Ashwani" <[EMAIL PROTECTED]>
To: "Struts (E-mail)"
Sent: Friday, April 08, 2005 7:10 AM
Subject: concurrency problem
I am facing concurrency problem in following scenario.
All our action classes call same stateful session bean . Each action class
obtains the reference from HTTPSession object and calls one and only one
business method.
To prevent the concurrent access to this instance which occurs when user
immediately presses two links quickly in succession I am using the following
code block
execute(...) //execute methods of Action class
{
//Obtain the session from Request.User will always be in session here
session=request.getSession()
Synchronised(session)
{
//call ejb's business method.
}
}
However sometimes more than one thread is able to pass through, And I get
exception from Appserver. As 2 threads are not allowed for statefull Session
bean.
Can there be problem in above code. Is it ok to synchronise on session
object.
Thanks & Regds
Ashwani
Ext: 1860
This message contains information that may be privileged or confidential and
is the property of the Capgemini Group. It is intended only for the person
to whom it is addressed. If you are not the intended recipient, you are not
authorized to read, print, retain, copy, disseminate, distribute, or use
this message or any part thereof. If you receive this message in error,
please notify the sender immediately and delete all copies of this message.
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
RE: Popups and Struts Actions
As I recall, and contrary to what some documentation says, it is actually the
absence or presence of the settings of open() that determines what chrome
elements are present. So:
window.open(this.target,'','width=1,height=1');
I believe is what you want. AFAIK,you also need to throw quotes around the
options and it also looks like you missing the title (dunno if there are
overloaded versions of open()) Here is how I do it in a production app, with
just scrollbars visible, and it also centers the window...
myLeft = (screen.width) ? (screen.width - 1180) / 2 : 0;
myTop = (screen.height) ? (screen.height - 924) / 2 : 0;
myOpts = "resizable,scrollbars,width=1180,height=924,top=" + myTop + ",left=" +
myLeft + ",";
window.open('page1.do', 'TOA', myOpts);
Frank
-Original Message-
From: "Dakota Jack"<[EMAIL PROTECTED]>
Sent: 4/8/05 3:01:43 AM
To: "Struts Users Mailing List"
Subject: Popups and Struts Actions
I am using the following code and do not want the menubar, etc. on my
popup. But the menubar and everything else is still showing up. You
javascript mavens out there, what is wrong?
--
"You can lead a horse to water but you cannot make it float on its back."
~Dakota Jack~
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[Message truncated. Tap Edit->Mark for Download to get remaining portion.]
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To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: Popups and Struts Actions
As I recall, and contrary to what some documentation says, it is actually the
absence or presence of the settings of open() that determines what chrome
elements are present. So:
window.open(this.target,'','width=1,height=1');
I believe is what you want. AFAIK,you also need to throw quotes around the
options and it also looks like you missing the title (dunno if there are
overloaded versions of open()) Here is how I do it in a production app, with
just scrollbars visible, and it also centers the window...
myLeft = (screen.width) ? (screen.width - 1180) / 2 : 0;
myTop = (screen.height) ? (screen.height - 924) / 2 : 0;
myOpts = "resizable,scrollbars,width=1180,height=924,top=" + myTop + ",left=" +
myLeft + ",";
window.open('page1.do', 'TOA', myOpts);
Frank
-Original Message-
From: "Dakota Jack"<[EMAIL PROTECTED]>
Sent: 4/8/05 3:01:43 AM
To: "Struts Users Mailing List"
Subject: Popups and Struts Actions
I am using the following code and do not want the menubar, etc. on my
popup. But the menubar and everything else is still showing up. You
javascript mavens out there, what is wrong?
--
"You can lead a horse to water but you cannot make it float on its back."
~Dakota Jack~
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
[Message truncated. Tap Edit->Mark for Download to get remaining portion.]
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Dinamic forms
Hi, can your helpmy with a dinamic form with struts? I need an example of a dinamic form, please thanks. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT]Tool to find amount of data transfered in web application
I'd use a packet sniffer like ethereal (www.ethereal.com) . Its free under the GNU license and tremendously powerful. You should be able to use it to measure both HTTP and Telnet traffic. The only problem I have with it is the amount of stuff it captures, fortunately it has sophisticated filtering so you can limit it to Just your application endpoint for instance. Duncan http://www.groundside.com/blog Ashish Kulkarni wrote: Hi I need this tool to find out the bandwidth used when using a green screen (clinet access) application and bandwidht when using web application Ashish --- "Fogleson, Allen" <[EMAIL PROTECTED]> wrote: You might check out jmeter (http://jakarta.apache.org/jmeter/index.html) it might be able to do what you want. Don't remember off the top of my head if it includes bandwidth reports but I think it does. Al -Original Message- From: Ashish Kulkarni [mailto:[EMAIL PROTECTED] Sent: Thursday, April 07, 2005 9:46 AM To: user@struts.apache.org Subject: [OT]Tool to find amount of data transfered in web application Hi I have to make a report to display amount of data transfered when using a web application, to find out if it will work in existing networking (Intranet) and there are no band width issues, Is there a open source tool which will tell the amount of data transfere in Intranet when accessing a web site from client browser machine Ashish __ Do you Yahoo!? Yahoo! Personals - Better first dates. More second dates. http://personals.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
concurrency problem
I am facing concurrency problem in following scenario.
All our action classes call same stateful session bean . Each action class
obtains the reference from HTTPSession object and calls one and only one
business method.
To prevent the concurrent access to this instance which occurs when user
immediately presses two links quickly in succession I am using the following
code block
execute(...) //execute methods of Action class
{
//Obtain the session from Request.User will always be in session here
session=request.getSession()
Synchronised(session)
{
//call ejb's business method.
}
}
However sometimes more than one thread is able to pass through, And I get
exception from Appserver. As 2 threads are not allowed for statefull Session
bean.
Can there be problem in above code. Is it ok to synchronise on session object.
Thanks & Regds
Ashwani
Ext: 1860
This message contains information that may be privileged or confidential and is
the property of the Capgemini Group. It is intended only for the person to whom
it is addressed. If you are not the intended recipient, you are not authorized
to read, print, retain, copy, disseminate, distribute, or use this message or
any part thereof. If you receive this message in error, please notify the
sender immediately and delete all copies of this message.
Nested ActionForm Validation
I am trying to reuse ActionForms within an application but I am unsure how to deal with validation. What I have at the moment is an ActionForm1 which contains a second form ActionForm2. In validation.xml, how do I use the validation for ActionForm2 within the ActionForm1 validation? Can I use it with something like this - ActionForm2 has its own custom validations which I also need to call when submitting the form, can I call them by just using getActionForm2.validate(mapping,request) within ActionForm1 validation method or how can this be achieved? Thanks, Ciaran
Re: Popups and Struts Actions
method="post"
action="album_photo.CRACKWILLOW"
target="whereOwhere"
onsubmit="window.open(this.action,this.target,
'directories=0,status=0,menubar=0,scrollbar=2,toolbar=0,resizable=0,copyhistory=0,width=1,height=1');return
false">
You should consider moving your scripts out to a separate method. It would
even be better to move them to a separate .js file and include that on the
page.it's that whole 'reuse' thing.
--
James Mitchell
Software Engineer / Open Source Evangelist
Consulting / Mentoring / Freelance
EdgeTech, Inc.
678.910.8017
AIM: jmitchtx
Yahoo: jmitchtx
MSN: [EMAIL PROTECTED]
- Original Message -
From: "Dakota Jack" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List"
Sent: Friday, April 08, 2005 3:01 AM
Subject: Popups and Struts Actions
I am using the following code and do not want the menubar, etc. on my
popup. But the menubar and everything else is still showing up. You
javascript mavens out there, what is wrong?
onsubmit="window.open('',this.target,directories=0,status=0,menubar=0,scrollbar=2,toolbar=0,resizable=0,copyhistory=0,width=1,height=1);return
true;">
--
"You can lead a horse to water but you cannot make it float on its back."
~Dakota Jack~
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Popups and Struts Actions
I am using the following code and do not want the menubar, etc. on my popup. But the menubar and everything else is still showing up. You javascript mavens out there, what is wrong? -- "You can lead a horse to water but you cannot make it float on its back." ~Dakota Jack~ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
