How to run GWT in production mode

Question

I am trying to run GWT project in production mode, as per the instructions at https://developers.google.com/web-toolkit/usingeclipse. So my project foo is located as a folder foo in my desktop under th workspace folder. When I right click on the foo project in the Project Explorer, click Google - GWT Compile, I see some message like permutations 1, 2.. etc in the debugging console, after which it says that compilation is complete.

However, contrary to what the Google page says, no additional HTML/Javascript files are generated in the war folder. Also, if I enter foo/war/foo.html in the URL bar, I am getting a timed-out error (even though the page contains only a simple alert call).

Can anyone tell me what is going on here?

`foo.html` is supposed to contain some boilerplate code to inject the web-app's javascript (` — Eliran Malka, Feb 01 '13 at 16:02
well, i'd suggest than you read on the basics on the GWT docs. — Eliran Malka, Feb 01 '13 at 16:26
I know the basics very well. And I have read the docs as well, that's why I pointed to it in the URL. The problem is there even after this, that's why I am asking... — SexyBeast, Feb 01 '13 at 17:54
no it will generate chache.js if you compiled successfully .. — Suresh Atta, Feb 01 '13 at 18:23
Then how do I load the HTML file in the browser? Do i have to give the complete filepath? — SexyBeast, Feb 01 '13 at 19:00
Please stop down voting....almost evey gwt starter will face this... — Suresh Atta, Feb 01 '13 at 19:00
Previously, I was clicking `Run - Run As - Web Application`, then double clicking the URL shown in the console window.. — SexyBeast, Feb 01 '13 at 19:03
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/23799/discussion-between-the-suresh-atta-and-cupidvogel) — Suresh Atta, Feb 01 '13 at 19:05

score 9 · Accepted Answer · answered Feb 01 '13 at 20:22

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If you are running in GWT development mode after the compile

remove the parameter gwt.codesvr=127.0.0.1:9997 in the url given by eclipse

After you compile the code the whole gwt code will convert in to javascript so you can access like an normal HTML page with proper paths .

answered Feb 01 '13 at 20:22

Suresh Atta

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@suresh since gwt 2.8.0 beta this doesn't work. Popup says "the gwt module may need to be compiled". Any ideas? – timmacp Apr 21 '16 at 13:38

score 1 · Answer 2 · edited May 23 '17 at 11:53

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If your GWT project is a Maven project, and you are using gwt-maven-plugin, you can run mvn jetty:run-war (for example, using that as the goal of an Eclipse Maven Run Configuration): That will GWT compile your project into a war, and run it on localhost, thus running your Prod mode.

edited May 23 '17 at 11:53

Community

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answered Dec 30 '15 at 09:41

cellepo

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score 0 · Answer 3 · edited May 23 '17 at 12:33

This can test ui-only features in Production Mode. That's useful if that's all you need to do, especially if otherwise the running of a server for Production Mode occupies limited resources of your development machine that you'd like to save (whereas occupying them with a running server would be a "waste" if your testing doesn't need to make requests to that server anyways).

If your GWT project...

doesn't make any server requests for data yet (maybe your project is still in its infancy as well), and...
is a Maven project

... you can...

GWT compile your project
Maven package (those directions use gwt-Eclipse-maven-plugin) your project
open the packaged GWT host page (i.e: index.html, or < Your Module >.html, under yourProject/target/yourProject-< snapshot version >/) in a browser. Profit!

This is sufficient to test the project's ui-only features, thus in Production Mode. In fact, if your project has features that make server requests for data, but you aren't testing any of them, then this will still work to test just those ui-only features. Basically, any features requesting server data will not have those requests returned (as there is no server running to do that), but all other features will function, as they are ui-only.

If you need to test features that make server requests for data, then you'll have to run Production Mode via a server (that would respond to the requests). For example with Jetty server, see my other Answer here.

How to run GWT in production mode

3 Answers3

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