Re: How to initialize a session variable in a page render request?
Well, in the life cycle guide, it is said it could be used for initializations or caching. Actually, I have confirmed it could do that, but just it doesn't work to retrieve and mutate persistent variables. Cheers, Jeffrey Ai Michael Courcy wrote: > > I may be wrong as I'm a tapestry newbie, but pageAttached is something > related to the compilation and pooling of the page template. Thus it > should not deal with session buisness. > > jeffrey ai a écrit : >> Hi Folks, >> >> I am looking for the best way to initialize a session variable(@Persist) >> in >> a page render request once, so I could access it in the next action >> request. >> >> I tried to put the logic into "pageAttached" method like below: >> >> @Persist >> private xxx myVar; >> >> @SuppressWarnings(value = "unused") >> private void pageAttached() >> { >> if (myVar == null) initializeVar(); >> } >> >> >> It doesn't work as I expected. myVar is always null in "pageAttached" >> method. It seems the "pageAttached" method is not supposed to mutate a >> persistent variable. >> >> However, if I put this logic into some other place like below, it works >> fine. >> >> @Persist >> private xxx myVar; >> >> public String getSomeOtherVar() >> { >> if (myVar == null) initializeVar(); >> return someOtherVar; >> } >> >> >> Although it works, apparently, this is not a good place. >> Is there a better place to do session variable initialization? >> I believe it should not be put into constructor too because it will be >> viewable to other sessions. >> >> Thanks, >> Jeffrey Ai >> > > > -- > Michael Courcy > http://courcy.blogspot.com > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/T5%3A-How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13861371 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
Thanks Lasitha. I did a search later of all guide. It's only mentioned in the page navigation guide. I still think it should be mentioned in the life cycle guide. I think that's the first place for developers to look for that information. Cheers, Jeffrey Ai lasitha wrote: > > On Nov 20, 2007 4:54 AM, jeffrey ai <[EMAIL PROTECTED]> wrote: >> >> onActivate() solve the problem. I thought this method only get called for >> an >> action request, not for a page render request. >> Apparently, I am wrong. I think it should be documented at the following >> "Page Lifecycle" guide. >> http://tapestry.apache.org/tapestry5/tapestry-core/guide/lifecycle.html > > Is it not sufficient to have it here?: > http://tapestry.apache.org/tapestry5/tapestry-core/guide/pagenav.html > Perhaps a reference from lifecycle to pageNavigation? > > Cheers, lasitha. > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/T5%3A-How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13861368 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
No Carlos. Actually, you reminded me. The original message title is without T5. I added it later after reading your message. Thanks, Jeffrey Ai carlos f wrote: > > > > carlos f wrote: >> >> If you are using tap 4.x . . . >> > > Maybe if I looked at the subject of the original message I would have seen > the "T5" staring at me ;) > > Carlos > -- View this message in context: http://www.nabble.com/T5%3A-How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13860937 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
carlos f wrote: > > If you are using tap 4.x . . . > Maybe if I looked at the subject of the original message I would have seen the "T5" staring at me ;) Carlos -- View this message in context: http://www.nabble.com/T5%3A-How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13859449 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
I may be wrong as I'm a tapestry newbie, but pageAttached is something related to the compilation and pooling of the page template. Thus it should not deal with session buisness. jeffrey ai a écrit : Hi Folks, I am looking for the best way to initialize a session variable(@Persist) in a page render request once, so I could access it in the next action request. I tried to put the logic into "pageAttached" method like below: @Persist private xxx myVar; @SuppressWarnings(value = "unused") private void pageAttached() { if (myVar == null) initializeVar(); } It doesn't work as I expected. myVar is always null in "pageAttached" method. It seems the "pageAttached" method is not supposed to mutate a persistent variable. However, if I put this logic into some other place like below, it works fine. @Persist private xxx myVar; public String getSomeOtherVar() { if (myVar == null) initializeVar(); return someOtherVar; } Although it works, apparently, this is not a good place. Is there a better place to do session variable initialization? I believe it should not be put into constructor too because it will be viewable to other sessions. Thanks, Jeffrey Ai -- Michael Courcy http://courcy.blogspot.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
On Nov 20, 2007 4:54 AM, jeffrey ai <[EMAIL PROTECTED]> wrote: > > onActivate() solve the problem. I thought this method only get called for an > action request, not for a page render request. > Apparently, I am wrong. I think it should be documented at the following > "Page Lifecycle" guide. > http://tapestry.apache.org/tapestry5/tapestry-core/guide/lifecycle.html Is it not sufficient to have it here?: http://tapestry.apache.org/tapestry5/tapestry-core/guide/pagenav.html Perhaps a reference from lifecycle to pageNavigation? Cheers, lasitha. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
Thanks, Josh. onActivate() solve the problem. I thought this method only get called for an action request, not for a page render request. Apparently, I am wrong. I think it should be documented at the following "Page Lifecycle" guide. http://tapestry.apache.org/tapestry5/tapestry-core/guide/lifecycle.html Cheers, Jeffrey Josh Canfield-2 wrote: > >> >> I am looking for the best way to initialize a session variable(@Persist) >> in >> a page render request once, so I could access it in the next action >> request. >> >> > I can't tell you why pageAttached doesn't work (haven't tried it) but you > can use onActivate, or if it's for a form onPrepare. > > Josh > > On Nov 19, 2007 12:15 PM, jeffrey ai <[EMAIL PROTECTED]> wrote: > >> >> Hi Folks, >> >> I am looking for the best way to initialize a session variable(@Persist) >> in >> a page render request once, so I could access it in the next action >> request. >> >> I tried to put the logic into "pageAttached" method like below: >> >>@Persist >>private xxx myVar; >> >>@SuppressWarnings(value = "unused") >>private void pageAttached() >>{ >>if (myVar == null) initializeVar(); >>} >> >> >> It doesn't work as I expected. myVar is always null in "pageAttached" >> method. It seems the "pageAttached" method is not supposed to mutate a >> persistent variable. >> >> However, if I put this logic into some other place like below, it works >> fine. >> >>@Persist >>private xxx myVar; >> >>public String getSomeOtherVar() >>{ >>if (myVar == null) initializeVar(); >>return someOtherVar; >> } >> >> >> Although it works, apparently, this is not a good place. >> Is there a better place to do session variable initialization? >> I believe it should not be put into constructor too because it will be >> viewable to other sessions. >> >> Thanks, >> Jeffrey Ai >> -- >> View this message in context: >> http://www.nabble.com/How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13844361 >> Sent from the Tapestry - User mailing list archive at >> Nabble.com<http://nabble.com/> >> . >> >> >> - >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> > > > -- > -- > TheDailyTube.com. Sign up and get the best new videos on the internet > delivered fresh to your inbox. > > -- View this message in context: http://www.nabble.com/T5%3A-How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13847864 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
jeffrey ai wrote: > > I am looking for the best way to initialize a session variable(@Persist) > in a page render request once, so I could access it in the next action > request. > Jeffrey, I am not sure about the particulars of your situation. If you are using tap 4.x, you might want to look into the InitialValue/Bean annotation/specification element or use an application state object to configure and manage your session scoped object. Carlos -- View this message in context: http://www.nabble.com/How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13846518 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to initialize a session variable in a page render request?
> > I am looking for the best way to initialize a session variable(@Persist) > in > a page render request once, so I could access it in the next action > request. > > I can't tell you why pageAttached doesn't work (haven't tried it) but you can use onActivate, or if it's for a form onPrepare. Josh On Nov 19, 2007 12:15 PM, jeffrey ai <[EMAIL PROTECTED]> wrote: > > Hi Folks, > > I am looking for the best way to initialize a session variable(@Persist) > in > a page render request once, so I could access it in the next action > request. > > I tried to put the logic into "pageAttached" method like below: > >@Persist >private xxx myVar; > >@SuppressWarnings(value = "unused") >private void pageAttached() >{ >if (myVar == null) initializeVar(); >} > > > It doesn't work as I expected. myVar is always null in "pageAttached" > method. It seems the "pageAttached" method is not supposed to mutate a > persistent variable. > > However, if I put this logic into some other place like below, it works > fine. > >@Persist >private xxx myVar; > >public String getSomeOtherVar() >{ >if (myVar == null) initializeVar(); >return someOtherVar; >} > > > Although it works, apparently, this is not a good place. > Is there a better place to do session variable initialization? > I believe it should not be put into constructor too because it will be > viewable to other sessions. > > Thanks, > Jeffrey Ai > -- > View this message in context: > http://www.nabble.com/How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13844361 > Sent from the Tapestry - User mailing list archive at > Nabble.com<http://nabble.com/> > . > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- -- TheDailyTube.com. Sign up and get the best new videos on the internet delivered fresh to your inbox.
How to initialize a session variable in a page render request?
Hi Folks, I am looking for the best way to initialize a session variable(@Persist) in a page render request once, so I could access it in the next action request. I tried to put the logic into "pageAttached" method like below: @Persist private xxx myVar; @SuppressWarnings(value = "unused") private void pageAttached() { if (myVar == null) initializeVar(); } It doesn't work as I expected. myVar is always null in "pageAttached" method. It seems the "pageAttached" method is not supposed to mutate a persistent variable. However, if I put this logic into some other place like below, it works fine. @Persist private xxx myVar; public String getSomeOtherVar() { if (myVar == null) initializeVar(); return someOtherVar; } Although it works, apparently, this is not a good place. Is there a better place to do session variable initialization? I believe it should not be put into constructor too because it will be viewable to other sessions. Thanks, Jeffrey Ai -- View this message in context: http://www.nabble.com/How-to-initialize-a-session-variable-in-a-page-render-request--tf4839139.html#a13844361 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]