Depending on your backend (Spring Boot or not) you can generate ready to go 
Maven-projects. Use Maven goals to start the code server and the server. 
And debug inside the browser. No need for a GWT-plugin inside the IDE. 

Use: https://github.com/tbroyer/gwt-maven-archetypes to generate a module 
with separate client, server and shared module in case you do not have a 
Spring Boot server. Use: 
https://github.com/NaluKit/gwt-maven-springboot-archetype in case you 
prefer to use Spring Boot. This one also generates separate client-, 
shared- and server-module. Both are perfect starts for an update. 

When working on Windows use: *mvn:devmode *instead of *mvn:codeserver* .

Frank schrieb am Donnerstag, 15. Dezember 2022 um 14:34:52 UTC+1:

> Maybe https://dev.to/ibaca/modern-gwt-first-steps-509k can help
>
> As a note. We use the paid version of IntelliJ. This has a GWT plugin 
> aboard which we find very usefull.
>
> Op woensdag 14 december 2022 om 20:50:58 UTC+1 schreef 
> [email protected]:
>
>> It is a bit of a challenge to get GWT to work well in IntelliJ with 
>> Jetty. We finally got it working very well a year ago, thanks to a site 
>> that explained some of the key points for getting it to work. The URL of 
>> the site is 
>> https://imsavva.com/how-to-debug-gwt-in-2021-and-fix-error-scanning-entry/
>>
>> The site is a bit dated, but the main points are still valid. If you use 
>> jetty, do use jetty 10, not jetty 11. GWT 2.10.0 works. Java versions all 
>> the way to java 17 work. Not sure whether jetty 9.4 works with Java 9 and 
>> up; we never tried that combination. Over the last year, our combinations, 
>> with IntelliJ, have been:
>>
>> 1. gwt 2.8.2 with builtin jetty 9.2 (initially, before we moved to using 
>> the jetty plugin in IntelliJ))
>> 2. gwt 2.8.2, gwt 2.9.0, and gwt 2.10.0 with jetty plugin (jetty 9.4) and 
>> java 8
>> 3. gwt 2.10 with jetty 10 and jetty plugin and java 17. This is what we 
>> have now. The GWT configuration is a tiny bit different as GWT 2.10.0 can 
>> only handle Java 11 right now, not Java 17.
>>
>> We never found the need to use the jetty plugin until we needed to use 
>> WebSocket and jetty 9.2 can't handle WebSocket very well. There was a way 
>> to get around it, but unfortunately that way was blocked by Java 9 and up. 
>> A year ago, I found out about that site. I followed the instructions from 
>> that site and got everything working with some changes, as my source code 
>> structure is different from his.
>>
>> Let me know if you encountered an issue you can't solve. I don't check 
>> the mailbox of this email address, so posting the questions here is better. 
>> If this is the right way to go about this in this group.
>>
>> We have been using GWT since the beginning, for almost 15 years now. We 
>> started using jetty about 8 years ago; before that, we were using Tomcat 
>> (and Apache). We migrated from Eclipse to IntelliJ about 3 years ago. We 
>> never use maven as we need to be able to build the whole system with 
>> everything included in a repo (except Java). Just a weird requirement, that 
>> is for sure. So, we are still using ant to build our war file as well.
>>
>> On Wednesday, December 14, 2022 at 12:53:35 PM UTC-5 [email protected] 
>> wrote:
>>
>>> Hi,
>>>
>>> We succesfully use the gwt 2.10 dev mode to run and debug our 
>>> applications. We had to overide the JettyLauncher class to be able to run 
>>> it with java > 8.
>>> What kind of issue do you have with the dev mode (with gwt plugin on 
>>> eclipse) ?
>>>
>>> Le mer. 14 déc. 2022 à 18:22, mmo <[email protected]> a écrit :
>>>
>>>> Over the last years our GWT development environment has eroded more and 
>>>> more.
>>>> First the browser plugins seized to work, then the 
>>>> mapping/JS-code-backtranslation stopped working and recently also the IDE 
>>>> plugins for Eclipse and IntelliJ that would deploy the generated artifacts 
>>>> to the correct places, start the code server and allowed some minimalistic 
>>>> form of debugging seized to work. It is getting more and more not just 
>>>> frustrating but really horrible and "mission impossible".
>>>>
>>>> Thus a while ago I began an effort to port our application to GWT 2.10 
>>>> and Java 8 (our "production version" still runs with GWT 2.7 and Java 7 
>>>> and 
>>>> I can't go to higher Java versions due to some libraries, yet). 
>>>>
>>>> Meanwhile I found my way through all the library conflicts so that I am 
>>>> able to build and generate a version that runs fine when deploying the 
>>>> generated .war file to to a Tomcat Server (v8.5 in our case).
>>>>
>>>> But being able to building a running version is one thing. The other is 
>>>> to have a development setup that doesn't shy away developers crying and 
>>>> yelling but allows to do decent client side code debugging.
>>>>
>>>> With the "old" GWT plugin the commands "gwt:run" and "gwt:debug" didn't 
>>>> work anymore with GWT 2.10. I keep getting the following error during 
>>>> Jetty 
>>>> startup:
>>>>
>>>> java.lang.IllegalArgumentException: Object of class 
>>>> 'com.google.gwt.dev.shell.jetty.JettyLauncher.WebAppContextWithReload' is 
>>>> not of type 'org.eclipse.jetty.webapp.WebAppContext'. 
>>>> Object Class and type Class are from different loaders. in 
>>>> file:///D:/Projects/our-app/our-app-web/target/our-app/WEB-INF/jetty-web.xml
>>>>      at 
>>>> org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:421)
>>>>  
>>>>
>>>>      ...
>>>>
>>>> I also read in this forum that other people had issues with GWT 2.10 
>>>> and Jetty (and that the maintainers of GWT are aware of that but don't 
>>>> plan 
>>>> to fix this) so I guess it's time to switch to deploying to Tomcat, 
>>>> instead. Probably I also will switch to the new GWT plugin (by T.Broyer). 
>>>> I 
>>>> already tried it and I can at least build the same .war file using it.
>>>>
>>>> But how do I set this while thing up to provide a better developer 
>>>> experience? Is there some example or description of how to deploy a GWT 
>>>> 2.10 application to a Tomcat server in development mode (i.e. with code 
>>>> server and - if possible - hot code replacement, etc.)? How can GWT 
>>>> development be made "convenient" or at least acceptable again? 
>>>>
>>>> Any pointers, descriptions or examples would be highly appreciated!
>>>>
>>>> -- 
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>>>> an email to [email protected].
>>>> To view this discussion on the web visit 
>>>> https://groups.google.com/d/msgid/google-web-toolkit/d2fd58f0-f5e7-4a2b-9320-45d5ec244379n%40googlegroups.com
>>>>  
>>>> <https://groups.google.com/d/msgid/google-web-toolkit/d2fd58f0-f5e7-4a2b-9320-45d5ec244379n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>>

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