I was browsing through the fix list for Version 6.1 of the Application Server and was interested to note that APAR PK32169 is removing the J2CA0294W warning messaging (unless you have debug trace turned on) in Fix Pack 5. This is the warning that you see when performing a direct JNDI lookup of a connection factory i.e. you go straight to the global namespace rather than using a resource-reference and the application’s local namespace (java:comp/env). This message has always been rather contentious as it asserted that direct JNDI lookups were being deprecated yet various parts of the product still continued to use them. There was even a technote describing how to suppress the warnings as, in some cases, they were causing significant performance degradation.
Archive for the ‘Technology’ Category
Direct JNDI lookup warnings
Saturday, January 27th, 2007Another WordPress upgrade complete
Friday, January 26th, 2007I’ve now moved this blog and Christine’s up to WordPress 2.1. I’m still waiting for the WPG2 patch which resolves an issue with g2image and TinyMCE but as I rarely post via the web then this isn’t too much of a problem. More problematic was that WordPress now appears to add an extra paragraph tag in around the images which broke the style applied to the Gallery one-image class. Having moved that to the ImageFrame_none class everything appears to be functioning again.
One slightly annoying side-effect of the fact that categories are now shared between links and posts, when combined with my earlier fix, is that the empty Blogroll category now appears in my sidebar. Maybe one day I’ll implement the fix properly and hide entries that don’t have any posts in themselves or their sub-categories! In the meantime I just have to sit back and enjoy the new 2.1 features.
Update 28/01/07: Looks like wp_list_cats has now been fixed so that the hierarchical view does show empty categories with posts in sub-categories (indeed, the post count includes these) so I can remove my earlier fix.
More WebSphere ESB content on developerWorks
Saturday, January 20th, 2007I’m catching up on my developerWorks reading and there are a couple more articles on WebSphere ESB that are worth mentioning. The first is What’s new in WebSphere Enterprise Service V6. Note that the title actually refers to V6 not V6.0.2 so in fact this article provides a good overview of all of the product’s capabilities (although those new in V6.0.2 are highlighted). There are a couple of factual inaccuracies in the article which I’ve alerted the author to so hopefully those will get corrected.
One of the new features in 6.0.2 is the WebSphere MQ binding support which certainly seems to be getting a lot interest from my colleagues. Phil Norton from the WebSphere ESB development team has provided a tutorial that covers invoking a mediation module from an MQ Java client. In particular, it shows how to use a custom data binding to map from the MQ message to a data object. In the tutorial the service being invoked is represented as a Java component in the mediation module. This is by way of example and should not be considered best practice.
WordPress upgrade and widget fix
Tuesday, January 16th, 2007I’m glad I didn’t get round to moving up to WordPress 2.0.6 as, 10 days later, 2.0.7 is out. The upgrade itself went pretty smoothly. I’ve also fixed the categories widget in my sidebar. By default it doesn’t show categories without any postings but, in a hierarchical view, it doesn’t take in to account that sub-categories may have postings. Having selected Sidebar Widgets in the plugin editor, I located the widget_categories function in question. In the call to wp_list_cats I added &hide_empty=0 to the end of the parameter. You should now be able to see my People category (empty) but also its Family and Friends sub-categories (with postings).
Endpoint lookup mediation primitive
Monday, January 15th, 2007I’m finally finding some time to take a look at WebSphere ESB 6.0.2. The endpoint lookup mediation primitive for determining endpoint addresses based on information retrieved from WebSphere Service Registry and Repository was near the top of my list of things to try. Just as I was about to give up hope of getting it to work, a note arrived from Greg Flurry pointing out that you need to have Fix Pack 1 of Service Registry and Repository. Importantly, he also included a link to the install documentation in the InfoCenter. The update failed the first time as my machine was crawling along and the SOAP connection timed out. Having shutdown a few spare processes the fix pack went on fine and the primitive now works like a charm. Note that you can also install directly from the fix pack.
developerWorks WebSphere newsletter
Monday, January 8th, 2007The weekly developerWorks WebSphere newsletter, the prompt for many of my postings on this site and previously only available to IBMers, is now open to all. Sign up here.
MDB reconnection
Sunday, January 7th, 2007The asynchronous nature of message-driven beans means that the JMS provider must be permanently connected to the messaging system in order to know when a message is available for delivery. I received a question last week as to what WebSphere Application Server’s behaviour is when that connection is broken.
Image recovery
Sunday, January 7th, 2007A couple of weeks back I managed to wipe an SD camera card having failed to copy across a few images. Nothing too disastorous but I thought I’d see if I could get them back. Top marks to Zero Assumption Digital Image Recovery which found 120 images on the card including the ones I’d deleted. Meanwhile, my brother, who made the rather more serious mistake of wiping a whole USB hard drive only to discover the last backup had failed, has good things to say about the freeware PC INSPECTOR File Recovery.
RSS - Posts