Re: Problems deploying GWT app in Tomcat

On Wednesday, January 23, 2013 11:52:30 AM UTC+1, Jostein wrote:

Hi

I have developed an application in dev mode in Eclipe for some time and everything workes fine. Yesterday I tried to deploy to Tomcat, but the application did not launch in the browser. 

Then I tried the same with a basic Web Application Starter Project, generated automatically when creating a new GWT project i Eclipse. The new project consists of some basic functionality, RPC included.

The deploying process goes like this (this is my understandig of how to do it)

1. Perform "GWT Compile Project" from the blue "g" dropdown in the toolbar in Eclipse

2. Use default settings in the "GWT compile" dialog. Press "Compile".

3. After comiling I select the .war folder in the TestTomcat project in Eclipse.

4. Then rightclick ->  Export -> Archive file -> Next

5. Change the "To archive file" to "D:\apache-tomcat-7.0.34\webapps\TestTomcat.war.zip" -> Finish

6. Opens the D:\apache-tomcat-7.0.34\webapps folder and renames the "TestTomcat.war.zip" to "TestTomcat.war"

7. Then I restart Tomcat and now a new folder "TestTomcat" has been created in the webapps folder

I run my app in a browser with this url:

http://localhost/TestTomcat/TestTomcat/war/TestTomcat.html

The application starts as expected, but when I press the "Send" button that is sending a name to the server I get an error message

"An error occurred while attempting to contact the server. Please check your network connection and try again."

My JAVA_HOME=C:\Program Files\Java\jdk1.7.0_09

a) Why doesn't RPC work?

The fact your host page is at "TestTomcat/TestTomcat/war/TestTomcat.html" should ring a bell. It should probably be at "TestTomcat/TestTomcat.html" instead, which means your *.war isn't packaged correctly. The WEB-INF/ folder should be at the root of the WAR, alongside the TestTomcat.html.

 

b) Is this the correct way to deploy GWT application in Tomcat?

Probably not. Any "correct" way in my book would involve a build script (Ant, Maven, Gradle, or even Make or a shell/batch script) to package the app.

Dropping the WAR into Tomcat's webapps dir and restarting Tomcat is OK though; see http://tomcat.apache.org/tomcat-7.0-doc/appdev/deployment.html#Deployment_With_Tomcat (read through the whole tutorial, a GWT is no different, just that the javascript is generated from Java code by an additional build step)

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