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Peter Holditch

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This month's article is again inspired by a posting on the weblogic.developer.interest.transaction newsgroup. The question (excerpted from the posting) was: Does the 10 in weblogic-ejb-jar.xml apply to transactions that are in a suspended state? I have EJB1 (Container Managed/Required) that starts transaction T1 and does some work, then calls another EJB, EJB2 (Container Managed/NotSupported), which makes an interdomain T3 call. Since EJB2 is configured with NotSupported transaction attribute, transaction T1 is suspended for the time being while the business method of EJB2 is executing. The question is, if I set 10 for transactions started by EJB1, will it work? The answer is yes. End of article. Only joking! The subject of transaction timeouts and their relationship to ... (more)

Application Environments, Migration, and Transactions

No, don't worry, it's not a a floor-wax/dessert-topping/toothpaste article this month; it's simply a look at how multilanguage application environments might be used together in highly distributed systems. Interested? Well, don't worry, somebody has to beS Swallow your pride and read on, MacDuff! Looking at the IT systems of most large organizations is often closely akin to going on a fossil hunt. You dig through the J2EE surface to find a strata of C++ code in the supporting layers. Dig a little deeper and you start finding relics of a bygone age when C and Unix ruled the world. ... (more)

Transactions: How Distributed Are Yours?

Another discussion based on a weblogic.developer.interest.transaction posting this month. It's a newsgroup that always proves to be a good source of information for the world at large when it comes to transactional behavior (and a good source of inspiration for me when the article time of the month rolls around again). This particular posting is a great illustration of how an apparently simple assumption can pitch you into the bowels of the infrastructure, if you're not carefully guided by the architecture you're building against, and the possibilities it offers. The original po... (more)

WebLogic Performance: Pursuit of Speed Isn't Everything

"High performance" is what everybody strives for when putting together a new system. Technical folk often spend hours hung up on the raw speed of their code, and a certain machismo can be derived from shaving milliseconds off that pesky transaction that is the latest pride and joy. Often, this time is not very well spent. In the pursuit of raw speed, not only does readable code often get substituted for the obscure (usually to no avail - optimizing compilers are pretty good these days), thus causing a maintenance headache in the future, but in many cases the performance metric b... (more)

Transactions: Driving You to Distraction?

One definition of a commodity is something that you take for granted. I'll bet there aren't many readers out there who wake in the morning and exclaim, "Thank goodness there's air in the room to breathe!" Likewise, computer users will seldom give thanks for their operating systems, a proclamation like "praise be to those at AT&T and BSD for giving me Unix!" would likely raise more eyebrows than nods around an average water cooler. Things that are taken so much for granted are ripe for methods such as open source as provisioning mechanisms - at the end of the day, if its interfaces... (more)