Google App Engine
Starting a new project
Due to security restrictions on Google App Engine's sandbox,
some of VRaptor3's components must be replaced, and a different
selection of dependencies must be used. A version of the
blank project featuring these modifications is available at
our download page.
Limitations
A relevant detais is that the dependency injection does not work
when redirecting from one logic to another; the controller is
instantiated by filling with null all of its arguments. This
said, one should avoid call like:
result.use(Results.logic()).redirectTo(SomeController.class).someMethod();
validator.onErrorUse(Results.logic()).of(SomeController.class).someMethod();
using, instead, Results.page(). An alternative would be to
prepare your controllers to expect null as construction
arguments.
Troubleshooting
App Engine's execution environment nor does enable support
for Expression Language by default, nor supports the
<jsp-config/jsp-proprerty-group/el-ignored> tag. In this
situation, to enable the EL support, it's required to add
the following line to your JSP files:
<%@ page isELIgnored="false" %>
For tag files, use:
<%@ tag isELIgnored="false" %>
