Avrom’s Java EE and Oracle ADF Blog

This is the last in a series of posts about tuning business components. The complete list:

• Entity Objects
• Associations
• View Objects, Part 1
• View Objects, Part 2
• View Objects, Part 3
• View Links
• Application Modules, Part 1
• Application Modules, Part 2
• Application Modules, Part 3 (this post).

The last post was about understanding application module pooling, so I’m going to assume you understand it now. And if you understand application module pooling, you can understand the pain points from a performance perspective, and you can gain some idea of how to balance out differing concerns. Here are the pain points, in decreasing order of importance.

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Last week, I talked about a couple of tuning opportunities for ADF application modules: Lazy loading and shared application module instances. This week and next, I’m going to talk about a way to tune your application modules that is, in my opinion, even more important: Knowing how and when to adjust your application module pool settings. This week, I’m going to write about what application module pooling is; it’s pretty vital that you understand it before you try to tune it. Next week, in the final post in the ADF BC Tuning series, I’ll provide the actual application module pool tuning tips.

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It’s been a while since the last installment of ADF BC Tuning, but it’s time to start it up again. I’ve already posted tips for tuning entity objects, associations, view objects (in three parts), and view links, so now, let’s turn our attention to the last of the major business components: application modules.

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Last week, I talked about the essentials for doing any client-side component manipulation, as described in Lucas Jellema’s ODTUG Kaleidoscope 2009 talk, “That’s Rich! Putting a smile on ADF Faces.” This week, I’m going to talk about a couple of simple use cases for client-side programming that he demonstrated.

Before I do that, though, I should mention what I think is currently the most important resource for client-side programming: Frank Nimphius‘ JavaScript Programming Nuggets page. That contains a lot of tips about ADF Faces RC client-side programming, and goes into a considerably higher level of sophistication than Lucas’ talk did (or this post will). But in case you find that a bit intimidating to start out with, here are three very simple use cases for client-side programming.

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Two weeks ago, I compared a pair of talks I saw at ODTUG Kaleidoscope 2009, “That’s Rich! Putting a smile on ADF Faces,” by Lucas Jellema, and “Fusion Design Fundamentals,” by Duncan Mills. In particular, I contrasted the two opinions given of ADF Faces RC client-side (that is, Javascript) programming, and came down on Lucas’ side: Adding Javascript to ADF Faces RC applications, though it shouldn’t be overdone, can be very useful, and the usual risks attendant on Javascript programming are significantly mitigated if you develop exclusively to the ADF Faces RC Client-Side API (rather than attempting direct access to/manipulation of the DOM) and understand what validation in Javascript can and can’t do (provide convenience for the user and protection against honest user error and provide real enforcement of data integrity, respectively).

What I didn’t get a chance to do in that post was talk about the actual tips for client-side component manipulation that Lucas provided. I’m going to do this over the next couple of weeks. This week, I’m going to talk about the essentials for doing any client-side component manipulation. Next week, I’ll talk about some specific component manipulation use cases that Lucas went over in his talk.

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