Apache Wicket 1.4 Released

by Dio Synodinos on Aug 13, 2009 | This item in chinese |

The Apache Wicket project has released version 1.4 of its open source, component oriented Java web application framework. This is their first release that requires Java 5 and above which allows for the use of Java 5 idioms like the generics which increase type safety of the APIs.

Athough there have been several notable changes in 1.4 it is mostly compatible with 1.3 so migrating your application to the latest release should be smooth:

From all the changes that went into this release, the following are the most important ones:

  • Generified IModel interface and implementations increases type safety in your Wicket applications
  • Component#getModel() and Component#setModel() have been renamed to getDefaultModel() and setDefaultModel() to better support generified models
  • The Spring modules have been merged (wicket-spring-annot is now obsolete, all you need is wicket-spring)
  • Many API's have been altered to better work with Java 5's idioms
  • Wicket jars are now packaged with metadata that makes them OSGI bundles

You can download manually this release or get it with Maven:


Arun Gupta reports on his experience upgrading to 1.4:

You may encounter the following error:

2009-08-05 05:58:49.387::INFO: No Transaction manager found - if your webapp requires one, please configure one.
ERROR - DiskPageStore - Couldn't load DiskPageStore index from file /Users/arungupta/workspaces/runner~subversion/wicket/runner/target/work/wicket.runner-filestore/DiskPageStoreIndex.
java.lang.ClassNotFoundException: org.apache.wicket.util.concurrent.ConcurrentHashMap
        at Method)
        at java.lang.ClassLoader.loadClass(

At least I did :)

Fortunately the fix is simple and intuitive. Instead of running "mvn jetty:run", invoke the command:

mvn clean jetty:run

Basically, "clean" will clean out references to older version of Wicket jars in your project and voila!

The Mystic Coders have also posted an upgrade to 1.4 guide for their original “5 Days of Wicket!” tutorial.

You can find more information about Wicket and other Frameworks right here on InfoQ!

Rate this Article


Hello stranger!

You need to Register an InfoQ account or or login to post comments. But there's so much more behind being registered.

Get the most out of the InfoQ experience.

Tell us what you think

Allowed html: a,b,br,blockquote,i,li,pre,u,ul,p

Email me replies to any of my messages in this thread

Congratulation! by qiu james

Web development gets funny again with Wicket.

a greate upgrade for wicket 1.4 by bb Ghost

i used Tapestry for years, this time sounds a greate upgrade for wicket 1.4
a simple translate:Apache Wicket 1.4 发布

Allowed html: a,b,br,blockquote,i,li,pre,u,ul,p

Email me replies to any of my messages in this thread

Allowed html: a,b,br,blockquote,i,li,pre,u,ul,p

Email me replies to any of my messages in this thread

2 Discuss
General Feedback
Marketing and all content copyright © 2006-2016 C4Media Inc. hosted at Contegix, the best ISP we've ever worked with.
Privacy policy

We notice you're using an ad blocker

We understand why you use ad blockers. However to keep InfoQ free we need your support. InfoQ will not provide your data to third parties without individual opt-in consent. We only work with advertisers relevant to our readers. Please consider whitelisting us.