GXT 2.X to 4.0.2 migration issues

Question

We used to have GWT 2.4 & GXT 2.2.5 and we are migrating to GWT 2.8.1.

Now I am using GWT 2.8 with gxt 2.2.5 and Jdk 1.8.0_291, even when upgrading gxt-2.3.1a-gwt22 I still get this error when maven is building I got this error

jar:file:/war/WEB-INF/lib/gxt-2.3.1a-gwt22.jar!/com/extjs/gxt/ui/client/widget/form/ListField.java' > Line 322: The method append(boolean) is ambiguous for the type StringBuffer

After searching I thought it is imposible to resolve it, I don't have the right to edit the dependency.

So I decided to upgrade gxt to 4.0.2, am I right?

but when I did all the app broke, most of Types don't exist anymore and the migration is not well documented on sencha website, they provide a unique page that doesn't help.

Do you have a tutorial or a guide that helps? or maybe a workaround?

Answer 1

Moving from GXT 2.x to 4.0.2 will create a lot of work. Take a look here:

Sencha GXT 2.x to 4.x Migration Guide

To get gxt-2.3.1a working with GWT 2.8.2 or even 2.9.0 (and maybe 2.10.0 - did not check this) you need to fix the bugs. The easiest way would be to override the class and correct the things that are wrong.

F.e.: Fixing the ListField bug, you have to:

• create a package: 'com.extjs.gxt.ui.client.widget.form'
• create a class named 'ListField'
• copy the code from the ListField class into you new class
• fix the problem

I did that in the past and IIRC it was not much work.