Summa

We have all been in projects where we use a combination of open source libraries, for different components of our architecture. We know theoretically that it should work, but alas, something blows up at runtime. If we’re lucky, we experience this on a weekly basis, but we don’t get lucky that often. The “Conundrum Solved” series will tackle some of these hair-pulling, sleep-depriving, grouch-inducing problems some of us at Summa have encountered in our projects. We hope that by sharing them with you, you’ll keep your hair, get enough sleep, and maintain a smile on your face!

Problem: Invalidly getting an InvalidStateObjectStateException thrown upon calling  merge(), even if there were no updates to the entity.

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In a recent project the interface designer in my team asked whether we could disable the anchor tag (for expand/collapse) on the disclosure panel header and have a single button do the job, helping the user with a hint that this panel is actually expandable. I said OK, let’s see the DisclosurePanel javadoc. Suprise! All you can do is have a header and that itself is surrounded by the clickable anchor… time to extend Composite!

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Summa CEO Audrey Dunning will share insight to the future of Cloud Computing as a panelist along with representatives from Amazon, Salesforce.com and IBM at a TiE Pittsburgh event to be held at CMU on Wednesday, Jan 27. More information here: here and registration with TiE Pittsburgh here

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