What are the key benefits when upgrading from Wicket 1.3.7 to 1.4.9?

I am thinking about migrating a large web app from Wicket 1.3.7 to Wicket 1.49. As some basic things have changed with version 1.4, this will be quite some effort.

Apart from getting to use generics, what would be the key benefit开发者_StackOverflows of upgrading? From what I have read, I am not sure whether the benefits pay off for the migration effort. What is your opinion?

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The differences between 1.4.0 and 1.4.9 are mostly bugfixes and minor improvements, so your question really boils down to the benefits of going from 1.3 to 1.4. One caveat:

It is worth noting that WICKET-2846 will almost definitely be reverted in the next release because the community has shown a preference for this. So, it would be wise not to take advantage of the InheritableThreadLocal that was put into version 1.4.9.

-Wicket main page

Generics, which you mentioned, certainly are the most visible change, and the one that will likely involve the most work if you are annoyed by warnings. See the Wicket wiki on upgrading and the expanded news post for a more comprehensive list of the changes.

My team at work migrated a few months ago and didn't notice any big effects, good or bad. It did take a few hours to update the generics references, but there's some comfort in knowing you're not using past-end-of-life technology, too. We don't use Spring here, but 1.4 is supposedly much more compatible with Spring than previous versions were.

In your case, it may just come down to what you find more annoying: spending a few hours generifying your code or using something that's in end-of-life status.

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I have loaded Apache Wicket to Java upstream tracker service that performed backward compatibility analysis for all versions of Wicket API from 1.3 to 1.4.15 including 1.3.7 and 1.4.9 versions.

It may help you to investigate upgrade issues caused by incompatible changes in Wicket API.