AW: controlling portlet caching in jetspeed 1.5
Hi, I have got some further questions about caching strategy regarding Portlets and Portals. BTW, I use J2. When multiple Portlets get displayed on a page, it would speed up the Portal if only the portlet whereupon a user interaction happened gets updated. The other Portlets may cache their state in that simply their HTML fragment (or whatever the output format is) gets stored in a persistence layer. The Portal may take responsibility for this (and should, in fact, if one thinks about it more deeply) by providing a configurable framework to do this. Rendering all Portlets on a page, even though only one got updated, obviously costs performance. On the other hand, all Portlets get displayed in their current state when the rendering request gets delegated to each of them. But then again, we often have the nasty situation that the user enters data in different Portlets, one Portlet gets updated, all Portlets render but the entered data may be lost in some or all of them, since the Portlets did not cache the user input properly. Hint: I found a WebSphere White Paper which introduced a thing called Dynacache which is able to store HTML snippets from Portlets/Servlets. Here my questions: 1. Are there any resources available, where the raised problems are discussed on a general based. I.e. is it a helpful thing to cache Portlet states at all? If not: Why? 2. What does the portlet specification says about this, or does it leave this subject open to the concrete Portal implementation? 3. How does J2 supports Portlet caching? Are there any cache strategies in control, already? Is there anything planned in the near or far future, or: Is there a certain strategy J2 developers and users should have in mind to comply with what's already there or planned? So this quite a lot asked, I know. Any help is very welcome. Thank you, Sven. Hi folks, I am looking into portlet caching a bit in Jetspeed 1.5. We have some portlets, all subclasses of VelocityPortlet. The data they pull (from an oracle database) is mostly static, but there are some times where data changes, and we'd like the portlets to reflect that. All of these portlets are marked as cacheOnValue, cacheOnName in the registry. I can tell that the data layer is getting the new data because we have a search portlet and the results correspond to the changed data. However, other display portlets don't reflect the changed data until the server is restarted. I spend some time in the js1.5 source (thanks, koders.com) and found that VelocityPortlets are cacheable by default. A couple of questions: 1. Can I refresh the portlet cache without restarting my servlet container? 2. I was able to find reference to an expiration time in millisecods (in AbstractPortlet) but didn't see that in the configuration files, and couldn't find a default value. Is there one? 3. I think that all that happens after portlets are stale (epxired) is that their refresh method is called. Is that true? 4. I'm thinking that turning off cacheOnValue might be a fix for our situation. Does that make sense? Thanks, Dan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Problem in creating the Users
Hello I have configured Jboss 4.0.1 and Jetspeed 2.0 and I was able to login and view my administrative portlets, but if I create some new users and try to login with the new user, it is telling invalid user name and password, but I could see the new user in the database.It accepts only the default users i.e admin,manager, user. but not the new users created, I have checked the AUTH_FAILURES in the table SECURITY_CREDENTIAL it is '0' only. If I try to change the admin password ,it shows that password is changed but if I try to login with new password it shows invalid password but it takes my old password. kindly show the way out from this problem regards, Pradeep Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments.
RE: controlling portlet caching in jetspeed 1.5 (2.0)
Hi Sven, -Original Message- From: Sven Thiergen [mailto:[EMAIL PROTECTED] Subject: AW: controlling portlet caching in jetspeed 1.5 When multiple Portlets get displayed on a page, it would speed up the Portal if only the portlet whereupon a user interaction happened gets updated. The other Portlets may cache their state in that simply their HTML fragment (or whatever the output format is) gets stored in a persistence layer. The Portal may take responsibility for this (and should, in fact, if one thinks about it more deeply) by providing a configurable framework to do this. Before working with Jetspeed, I had written my own non-compliant portal, and what you describe is EXACTLY the strategy I took for implementing caching ... it seemed to make the most sense ... at least performance wise. Here my questions: 1. Are there any resources available, where the raised problems are discussed on a general based. http://community.java.net/portlet/ 2. What does the portlet specification says about this, or does it leave this subject open to the concrete Portal implementation? I'm not an expert ... but to the best of my knowledge, I think it leaves it open. If someone else knows otherwise, please correct me ... 3. How does J2 supports Portlet caching? Are there any cache strategies in control, already? Is there anything planned in the near or far future, or: Is there a certain strategy J2 developers and users should have in mind to comply with what's already there or planned? There is a setting in the portlet application deployment descriptor (from the spec) named expiration-cache/ ... I think this is supposed to be a timer setting to specify the length a portal implementation may or may not cache the content of a given portlet. I'm not sure if Jetspeed2 has implemented this or not ... any J2 developers out there know if this is functional yet??? If so, does a value of -1 indicate that content should not be cached at all? - Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Using three column layout in Jetspeed 2
I am trying to configure a 3 column layout in Jetspeed-2. I am attaching my psml file here. I would expect to see three columns in the page layout, but it still renders the page with two columns 50% each. Is there any other configuration that i need to take care of? Does the fragment id has any significance or it just need to be an unique id? -- ?xml version=1.0 encoding=UTF-8? page id=/default-page.psml hidden=false security-constraints security-constraints-refpublic-view/security-constraints-ref /security-constraints titleWelcome to Dashboard/title short-titleWelcome to Dashboard/short-title defaults skin=orange layout-decorator=simple portlet-decorator=tigris/ fragment id=dp-1 type=layout name=jetspeed::VelocityThreeColumns fragment id=dp-3 type=portlet name=pam::LocaleSelector property name=row value=0 layout=ThreeColumns/ property name=column value=0 layout=ThreeColumns/ /fragment fragment id=dp-12 type=portlet name=security::LoginPortlet property name=row value=0 layout=ThreeColumns/ property name=column value=1 layout=ThreeColumns/ /fragment fragment id=dp-7 type=portlet name=demo::PickANumberPortlet property name=row value=0 layout=ThreeColumns/ property name=column value=2 layout=ThreeColumns/ /fragment fragment id=dp-16 type=portlet name=demo::RoleSecurityTest property name=row value=1 layout=ThreeColumns/ property name=column value=0 layout=ThreeColumns/ /fragment fragment id=dp-9 type=portlet name=demo::IFramePortlet property name=row value=1 layout=ThreeColumns/ property name=column value=1 layout=ThreeColumns/ /fragment fragment id=dp-17 type=portlet name=demo::UserInfoTest property name=row value=1 layout=ThreeColumns/ property name=column value=2 layout=ThreeColumns/ /fragment fragment id=dp-18 type=portlet name=demo::BookmarkPortlet property name=row value=2 layout=ThreeColumns/ property name=column value=0 layout=ThreeColumns/ /fragment fragment id=dp-23 type=portlet name=dashboard::DashboardPortlet property name=row value=2 layout=ThreeColumns/ property name=column value=1 layout=ThreeColumns/ /fragment /fragment /page -- Regards Satya - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: JFreeChart and JetSpeed2
I figured this out. CeWolf tag library creates an image tag like img src=/context/..., and then a new request is made to tomcat to render the chart. My portlet and chart tag libraries are packaged in a different webapp and therefore, the sessions are also different. One solution is perhaps to deploy my portlet and JetSpeed in one webapp, but I think I will keep them separate just to keep them clean and then figure out an inter webapp communication mechanism to render the chart. Regards Satya -Original Message- From: Satyabrata Dash Sent: Thursday, February 10, 2005 10:14 PM To: jetspeed-user@jakarta.apache.org Subject: JFreeChart and JetSpeed2 Hi, I am trying to use CeWolf and JFreeChart packages within JetSpeed2 Portlets. The image never gets rendered and I get The Chart has expired and please reload error. When I debugged this error message, I found that somehow the session object used by renderer is different. So the image is never found in session object in the renderer code. Has anyone else ever run into similar issues? Regards -Satya - 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]
