From the Desk of Oracle ACE Director

Chris Muir

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Top Stories by Chris Muir

The following documents a somewhat small issue we're having with JDeveloper At this time I'm unable to lodge an SR with Oracle Support as we don't understand the circumstances under which it occurs, thus we can't build the usual simple "Hello World" test case that Support so thrives on. However as we've identified the symptoms of the problem and the associated workaround I'll publish them here for others to benefit (including my team) so we don't hit the issue again. Note this issue is only verified under JDev I have no knowledge if the issue can be replicated in other JDev versions as this stage. Issue Symptoms From time to time after checking out an application from SVN inside JDeveloper: ....we'd discover JDev has incidentally modified one of the project files. In the following example the ViewController project is italicized meaning it has ... (more)

An ADF Logic Bomb

One of my talented colleagues discovered an interesting ADF logic bomb which I thought I'd share here. The issue is with the instantiation order of ADF Faces scoped beans in JDev 11g when using Bounded Task Flows embedded as regions in another page. Regular readers would be familiar with the fact that Oracle's ADF solution is built on top of JavaServer Faces (JSF). ADF supports bean scopes such as ViewScope, PageFlowScope and BackingBeanScope on top of the regular JSF ApplicationScope, SessionScope and RequestScope beans. Readers should also be familiar that the beans have a defi... (more)

Stress & Load Testing Web Apps (Even ADF & Apex) Using Apache JMeter

A couple of years ago I presented Take a load off! Load testing your Oracle Apex or JDeveloper web applications at OOW and AUSOUG. I can't recommend enough the importance of stress testing your web applications, it's saved my bacon a number of times. Frequently as developers, we develop under a single user (developer) model where concurrency issues are easily avoided. When our programs hit production, with just 1 more user, suddenly our programs grind to a halt or fall over in bizarre places. Result, pie on developers' faces, users' faith in new technologies destroyed, and genera... (more)

One-Way SSL with JAX-WS Using JDeveloper 11gR1 and WLS 10.3.1

A while back Gerard Davison blogged some simple examples of using WS-Security Policies. Gerard's specific example dealt with the WLS policy Wssp1.2-2007-Wss1.1-UsernameToken-Plain-X509-Basic256.xml. As Gerard notes the said policy (further documented in the WLS 10.3.1 doco here) implements user name tokens, encryption of the tokens and signing of the whole SOAP payload. The following post strips back Gerard's example to instead to consider the steps in setting up and testing One-Way SSL for a JAX-WS web service generated via JDeveloper 11gR1 and installed in WLS 10.3.1, using the... (more)

Upgrading Oracle WebLogic Servers from 10.3 to 10.3.1

Recently we upgraded our Oracle WebLogic Servers from 10.3 to 10.3.1, and coincidentally migrated a JDeveloper ADF application 11g to 11gR1. ADF applications require a set of libraries that must be deployed to WLS before the ADF application can run, of which we completed successfully, or so we thought. This post documents a little trap for new players when configuring WLS and deployed applications. On deploying our upgraded ADF 11gR1 application to our WLS 10.3.1 server with the updated ADF libraries, we hit an error on deployment from JDev. The logs showed the following results:... (more)