Re: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
On 20.12.2007, at 18:16, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Does this mean that Tapestry will keep in its page pool an IExternalPage page for each article I have in the DB (once this page is visited)? Please refer to http://tapestry.apache.org/tapestry4.1/usersguide/state.html Tapestry will keep in its pool one instance for each *concurrent request* it is serving. Your persistent page-id will be stored in the session or on the client (configurable). When a request comes in, Tapestry will pick a page from the pool and provide it with the persistent property data, e.g. the reference to your db-data. I don't see how this solves my problem of emitting DirectLinks with parameters into the page. If I understand you correctly, you say that by using persisted properties, my DirectLinks do not need to contain the page's parameters, right? Suppose my article page contains a link to download the article. This link is implemented via a DirectLink. Suppose now the user opens two tabs, in this order: http://my.org/app?page=Articleid=1 http://my.org/app?page=Articleid=2 After this, the session holds id=2. Now the user clicks the download link in the former page (id=1). As this DirectLink does not contain id=1 the user will get article 2. That's not what the user expects. Do I misunderstand this? It seems to me that persistent properties do not solve the problem. I need a way to tell DirectLink to look up the current external page's parameter's and embed them in the link. Kaspar P.S. I understand that I can pass additional parameters to the DirectLink by setting its parameters parameter. Still, I am posting because I do not understand Tapestry's idea of handling page parameters: For instance, I want to use Contrib:Table on my page. It emits lots of links (links to sort the table). But if these links do not contain my page parameters, the page will not render when the user clicks to sort the table. That's why I ask how to do this with a simple DirectLink -- although my actual problem is Contrib:Table, and possibly other components. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
2007/12/21, Kaspar Fischer [EMAIL PROTECTED]: On 20.12.2007, at 18:16, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Does this mean that Tapestry will keep in its page pool an IExternalPage page for each article I have in the DB (once this page is visited)? Please refer to http://tapestry.apache.org/tapestry4.1/usersguide/state.html Tapestry will keep in its pool one instance for each *concurrent request* it is serving. Your persistent page-id will be stored in the session or on the client (configurable). When a request comes in, Tapestry will pick a page from the pool and provide it with the persistent property data, e.g. the reference to your db-data. I don't see how this solves my problem of emitting DirectLinks with parameters into the page. If I understand you correctly, you say that by using persisted properties, my DirectLinks do not need to contain the page's parameters, right? Suppose my article page contains a link to download the article. This link is implemented via a DirectLink. Suppose now the user opens two tabs, in this order: http://my.org/app?page=Articleid=1 http://my.org/app?page=Articleid=2 After this, the session holds id=2. Now the user clicks the download link in the former page (id=1). As this DirectLink does not contain id=1 the user will get article 2. That's not what the user expects. Do I misunderstand this? It seems to me that persistent properties do not solve the problem. I need a way to tell DirectLink to look up the current external page's parameter's and embed them in the link. Sounds like what you really want is client-side persistence. This will store your page-state in the URL - or in a hidden field, if your page uses forms. So, to be concrete, if you're having a non-null property annotated with @Persist(client), or tagged appropriately in the .page xml-File, your direct Link will, magically, render as something like: http://localhost:8080/myapp/app?component=dlpage=Homeservice=directstate:Home=BrO0ABXcQAQAACXRyaWdnZXJlZHQAATE%3D The funny String making up the value of the parameter state:Home is actually the Base64 encoded version of your page-state. That way, a user opnening several instances of your page in multiple browser windows/tabs will see what he expects (possibly ;)) Btw., don't worry about asking basic questions, that's ok, of course. Marcus -- Marcus Schulte http://marcus-schulte.blogspot.com
RE: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
I suppose your page implements IExternalPage? If you seed you page/app with external parameters which you need later on, in subsequent requests, store them in page/component properties marked as @Persist-ent. -Original Message- From: Kaspar Fischer [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 19, 2007 4:10 PM To: Tapestry users Subject: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters) Dear list, In order to isolate the problem, I tried to do something much simpler: showing a DirectLink on one of my pages. The tapestry manual gives an example on how to use DirectLink with listeners: http://tapestry.apache.org/tapestry4/QuickStart/directlink.html http://tapestry.apache.org/tapestry4/UsersGuide/listenermethods.html However, these examples assume that the content of the page containing the DirectLink does not depend on page parameters. How can I use a DirectLink on a page that depends on a parameter, for instance of, on a page like this http://my.org/app?page=Articleid=27 The link generated by a DirectLink component is something like http://...Article,$MyComponent.$DirectLink.sdirect but does not mention the id. So the listener is executed but afterwards, the Article page does not know which item (namely id=27) it should show! I feel very much that I am on the wrong track and would be very glad to receive some help. Many thanks, Kaspar On 17.12.2007, at 20:50, Kaspar Fischer wrote: Hm, I think my question was not well formulated. Apologies. I'll try once more! Suppose you want to implement an index that shows all files starting with A, B, etc. My page would show A B C D ... X Y Z and you can click on a letter to show the files starting with this letter in a sortable Contrib:Table. How would I do this? Can somebody lead me on the right track? Thanks! Kaspar On 16.12.2007, at 17:08, Kaspar Fischer wrote: Hi list, How can I tell Contrib:Table to pass on page paremeters? When I click on a table column to sort it, the page that opens does not have the page parameters of the old page anymore! More precisely, my page Page.html uses a paremeter (nodeid) to know what content to display. So in Page.java's pageBeginRender() method I have String nodeIdParam = cycle.getParameter(nodeid); and then I load the data from a database and display a few things in a Contrib:Table. Unfortunately, the link that the Contrib:Table generates in order to sort a column does not contain the value for parameter nodeid: http://localhost:8080/kc/ Page,tableColumnComponent.linkColumn.sdirect?container=Contrib% 3ASimpleTableColumnPagesp=APage%2C% 24SortableTable.table.tableViewsp=SnodeTableTitle So when I click the link, my node does not know what data to load from the database! I think I need to tell Contrib:Table to include the nodeid in the link, right? How can I do this? Many thanks, Kaspar - 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: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Kasper, How can I use a DirectLink on a page that depends on a parameter, for instance of, on a page like this http://my.org/app?page=Articleid=27 So if i got the point, you just want to create a link that refers to a special article wich is identified by an id ... right? The tapestry manual gives an example on how to use DirectLink with listeners: http://tapestry.apache.org/tapestry4/QuickStart/directlink.html if you read a bit further there is a part Passing data in the links ... which should solve your problem. Andreas Kaspar Fischer wrote: Dear list, In order to isolate the problem, I tried to do something much simpler: showing a DirectLink on one of my pages. The tapestry manual gives an example on how to use DirectLink with listeners: http://tapestry.apache.org/tapestry4/QuickStart/directlink.html http://tapestry.apache.org/tapestry4/UsersGuide/listenermethods.html However, these examples assume that the content of the page containing the DirectLink does not depend on page parameters. How can I use a DirectLink on a page that depends on a parameter, for instance of, on a page like this http://my.org/app?page=Articleid=27 The link generated by a DirectLink component is something like http://...Article,$MyComponent.$DirectLink.sdirect but does not mention the id. So the listener is executed but afterwards, the Article page does not know which item (namely id=27) it should show! I feel very much that I am on the wrong track and would be very glad to receive some help. Many thanks, Kaspar On 17.12.2007, at 20:50, Kaspar Fischer wrote: Hm, I think my question was not well formulated. Apologies. I'll try once more! Suppose you want to implement an index that shows all files starting with A, B, etc. My page would show A B C D ... X Y Z and you can click on a letter to show the files starting with this letter in a sortable Contrib:Table. How would I do this? Can somebody lead me on the right track? Thanks! Kaspar On 16.12.2007, at 17:08, Kaspar Fischer wrote: Hi list, How can I tell Contrib:Table to pass on page paremeters? When I click on a table column to sort it, the page that opens does not have the page parameters of the old page anymore! More precisely, my page Page.html uses a paremeter (nodeid) to know what content to display. So in Page.java's pageBeginRender() method I have String nodeIdParam = cycle.getParameter(nodeid); and then I load the data from a database and display a few things in a Contrib:Table. Unfortunately, the link that the Contrib:Table generates in order to sort a column does not contain the value for parameter nodeid: http://localhost:8080/kc/Page,tableColumnComponent.linkColumn.sdirect?container=Contrib%3ASimpleTableColumnPagesp=APage%2C%24SortableTable.table.tableViewsp=SnodeTableTitle So when I click the link, my node does not know what data to load from the database! I think I need to tell Contrib:Table to include the nodeid in the link, right? How can I do this? Many thanks, Kaspar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHakWZM14O/Esx/74RAr0NAJ9pFv2K9OTzJ/zBl78ArQ3WinoH5wCgkqyC 7KlJPCE7kiJKuTgiK9N53gs= =NXgf -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
Hi Andreas, On 20.12.2007, at 11:36, Andreas Pursian wrote: How can I use a DirectLink on a page that depends on a parameter, for instance of, on a page like this http://my.org/app?page=Articleid=27 So if i got the point, you just want to create a link that refers to a special article wich is identified by an id ... right? The tapestry manual gives an example on how to use DirectLink with listeners: http://tapestry.apache.org/tapestry4/QuickStart/directlink.html if you read a bit further there is a part Passing data in the links ... which should solve your problem. I have read this, and you are right: it solves the problem in this particular case where I only want to generate a link. However, if you look at my original post, then I do not see anymore how to solve the problem. The latter post is about generating links, too. But this time it is not me who is generating the links but Contrib:Table. (It generates links to sort a table.) Again, I run into the same problem: The links generated by Contrib:Table only identify the page class (Article) but *not* its id. So when you click on the link, the page does not know which article to show. In the DirectLink example, I can -- as you say -- pass parameters manually. But how would I do it with Contrib:Table? Kaspar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
Dear Marcus, First of all, thanks a lot for your reply! I am not sure whether I understand what you say. I have a variable (and huge) number of actual pages. (In fact, each is coming from a DB entry.) Because the number is variable, I chose to implement a *single* Tapestry page class for the *many* pages I have. On 20.12.2007, at 09:55, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I suppose your page implements IExternalPage? You mean that I create a single Tapestry class implementing IExternalPage, right? All my (variably many) pages use this class. Correct? If you seed you page/app with external parameters which you need later on, in subsequent requests, store them in page/component properties marked as @Persist-ent. Does this mean that Tapestry will keep in its page pool an IExternalPage page for each article I have in the DB (once this page is visited)? Is this a good idea? I have lots of pages and at some point, the memory might be full. Or is there some mechanism that purges pages from the cache? I am sorry if my questions are quite basic! The more I appreciate your help. Kaspar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
I suppose your page implements IExternalPage? You mean that I create a single Tapestry class implementing IExternalPage, right? All my (variably many) pages use this class. Correct? Yes. If you seed you page/app with external parameters which you need later on, in subsequent requests, store them in page/component properties marked as @Persist-ent. Does this mean that Tapestry will keep in its page pool an IExternalPage page for each article I have in the DB (once this page is visited)? Please refer to http://tapestry.apache.org/tapestry4.1/usersguide/state.html Tapestry will keep in its pool one instance for each *concurrent request* it is serving. Your persistent page-id will be stored in the session or on the client (configurable). When a request comes in, Tapestry will pick a page from the pool and provide it with the persistent property data, e.g. the reference to your db-data. Is this a good idea? I have lots of pages and at some point, the memory might be full. Or is there some mechanism that purges pages from the cache? I am sorry if my questions are quite basic! The more I appreciate your help. Kaspar - 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]
Help needed with DirectLink and page parameters (Was: Contrib:Table and page parameters)
Dear list, In order to isolate the problem, I tried to do something much simpler: showing a DirectLink on one of my pages. The tapestry manual gives an example on how to use DirectLink with listeners: http://tapestry.apache.org/tapestry4/QuickStart/directlink.html http://tapestry.apache.org/tapestry4/UsersGuide/listenermethods.html However, these examples assume that the content of the page containing the DirectLink does not depend on page parameters. How can I use a DirectLink on a page that depends on a parameter, for instance of, on a page like this http://my.org/app?page=Articleid=27 The link generated by a DirectLink component is something like http://...Article,$MyComponent.$DirectLink.sdirect but does not mention the id. So the listener is executed but afterwards, the Article page does not know which item (namely id=27) it should show! I feel very much that I am on the wrong track and would be very glad to receive some help. Many thanks, Kaspar On 17.12.2007, at 20:50, Kaspar Fischer wrote: Hm, I think my question was not well formulated. Apologies. I'll try once more! Suppose you want to implement an index that shows all files starting with A, B, etc. My page would show A B C D ... X Y Z and you can click on a letter to show the files starting with this letter in a sortable Contrib:Table. How would I do this? Can somebody lead me on the right track? Thanks! Kaspar On 16.12.2007, at 17:08, Kaspar Fischer wrote: Hi list, How can I tell Contrib:Table to pass on page paremeters? When I click on a table column to sort it, the page that opens does not have the page parameters of the old page anymore! More precisely, my page Page.html uses a paremeter (nodeid) to know what content to display. So in Page.java's pageBeginRender() method I have String nodeIdParam = cycle.getParameter(nodeid); and then I load the data from a database and display a few things in a Contrib:Table. Unfortunately, the link that the Contrib:Table generates in order to sort a column does not contain the value for parameter nodeid: http://localhost:8080/kc/ Page,tableColumnComponent.linkColumn.sdirect?container=Contrib% 3ASimpleTableColumnPagesp=APage%2C% 24SortableTable.table.tableViewsp=SnodeTableTitle So when I click the link, my node does not know what data to load from the database! I think I need to tell Contrib:Table to include the nodeid in the link, right? How can I do this? Many thanks, Kaspar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
