Wicket 8 AnnotatedMountScanner not working anymore

Question

After upgrading from Wicket 7 to Wicket 8, page mounting does not work anymore.

In Wicket 7 I added

new AnnotatedMountScanner().scanPackage("com.example").mount(this);

in my init() method of my AuthenticatedWebApplication And on my page I added @MountPath("/mypage").

In Wicket 8 this does not work anymore and instead of /mypage the browser URL points to wicket/bookmarkable/com.example.MyPage , however when I manually add
mountPage("AAA", MyPage.class); it works.

Here is my classpath with all wicket dependencies:

$ mvn dependency:tree | grep wicket [INFO] +-

org.apache.wicket:wicket-core:jar:8.0.0:compile [INFO] | +-
org.apache.wicket:wicket-request:jar:8.0.0:compile [INFO] | +-
org.apache.wicket:wicket-util:jar:8.0.0:compile [INFO] +-
org.wicketstuff:wicketstuff-annotation:jar:8.0.0:compile [INFO] +-
org.apache.wicket:wicket-spring:jar:8.0.0:compile [INFO] | -
org.apache.wicket:wicket-ioc:jar:8.0.0:compile [INFO] +-
org.apache.wicket:wicket-datetime:jar:8.0.0-M7:compile [INFO] +-
org.apache.wicket:wicket-auth-roles:jar:8.0.0:compile [INFO] +-
de.agilecoders.wicket:wicket-bootstrap-core:jar:2.0.2:compile [INFO]
| +- de.agilecoders.wicket:jquery-selectors:jar:2.0.0:compile [INFO] | +- de.agilecoders.wicket.webjars:wicket-webjars:jar:2.0.7:compile [INFO] | +- org.apache.wicket:wicket-extensions:jar:8.0.0:compile [INFO] +- de.agilecoders.wicket:wicket-bootstrap-extensions:jar:2.0.2:compile
[INFO] +-
com.googlecode.wicket-jquery-ui:wicket-jquery-ui-plugins:jar:8.0.0-M7:compile [INFO] | -
com.googlecode.wicket-jquery-ui:wicket-jquery-ui-core:jar:8.0.0-M7:compile

But I do not want to add all mypages manually. Is it possible to also use the AnnotatedMountScanner again in Wicket 8?

Answer 1

It turned out to be a class reloading issue with spring-boot devtools. When spring-boot-devtools was added as dependency, the RestartClassLoader always changed the Page Classes and Wickets Page Class Matching was out of order.

Explanation after debugging. When my BookmarkablePageLink called getURL() it went through normal Wicket processing of the RequestHandlers.

The crucial part began in the AbstractBookmarkableMapper#382 where Wicket tries to find out by calling checkPageClass if the page class from the RequestHandler matches to the class of the MountedMapper internally represented via the pageClassProvider.

@Override
protected boolean checkPageClass(Class<? extends IRequestablePage> pageClass)
{
    return Objects.equals(pageClass, this.getPageClass());
}

As the objects were not the same (due to the use of RestartClassLoader) my bookmarkable page did not get the URL from the MountedMapper.