Spring 3.1: GWT Maven Plugin and GWTHandler Integration (Part 4)

Review

In the previous section, we have studied how to generate a simple GWT application using the GWT Maven plugin. We've also learned how integrate Spring and GWT using the GWTHandler library. In this section, we will build and run the application using Maven, and show how to import the project in Eclipse (if you've decided in Part 2 to use command-line based development).

Table of Contents

Part 1: Introduction and Functional Specs
Part 2: Generating the GWT project
Part 3: Integrating Spring and GWTHandler
Part 4: Running the Application

Running the Application

Access the source code

To download the source code, please visit the project's Github repository (click here)

Building with Maven

1. Ensure Maven is installed
2. Open a command window (Windows) or a terminal (Linux/Mac)
3. Run the following command:
   

   mvn gwt:run

4. You should see the following output:
   

   [INFO] Scanning for projects...
   [INFO] ------------------------------------------
   [INFO] Building GWT Maven Archetype
   [INFO]    task-segment: [gwt:run]
   [INFO] ------------------------------------------
   [INFO] Preparing gwt:run
   [INFO] [gwt:i18n {execution: default}]
   [INFO] [gwt:generateAsync {execution: default}]
   [INFO] [gwt:run {execution: default-cli}]
   [ERROR] INFO: Mapped URL path [/greet] onto handler of type [class org.gwtwidgets.server.spring.GWTRPCServiceExporter]
   [ERROR] Feb 5, 2012 2:49:45 PM org.springframework.web.servlet.FrameworkServlet initServlet
   

Note: If the project will not build due to missing repositories, please enable the repositories section in the pom.xml!

Access the Entry page

1. Follow the steps with Building with Maven
2. Open a browser
3. Enter the following URL (8080 is the default port for Tomcat):
   

   http://127.0.0.1:8888/gwtmodule.html?gwt.codesvr=127.0.0.1:9997

   Or better yet, on the GWT Development Mode window, click on the Launch Default Browser button.
   

You should see the following page (the popup message will appear when you submit a name):

Import the project in Eclipse

1. Ensure Maven is installed
2. Open a command window (Windows) or a terminal (Linux/Mac)
3. Run the following command:
   

   mvn eclipse:eclipse -Dwtpversion=2.0

4. You should see the following output:
   

   [INFO] Scanning for projects...
   [INFO] Searching repository for plugin with prefix: 'eclipse'.
   [INFO] org.apache.maven.plugins: checking for updates from central
   [INFO] org.apache.maven.plugins: checking for updates from snapshots
   [INFO] org.codehaus.mojo: checking for updates from central
   [INFO] org.codehaus.mojo: checking for updates from snapshots
   [INFO] artifact org.apache.maven.plugins:maven-eclipse-plugin: checking for updates from central
   [INFO] artifact org.apache.maven.plugins:maven-eclipse-plugin: checking for updates from snapshots
   [INFO] -----------------------------------------
   [INFO] Building GWT Maven Archetype
   [INFO]    task-segment: [eclipse:eclipse]
   [INFO] -----------------------------------------
   [INFO] Preparing eclipse:eclipse
   [INFO] [gwt:i18n {execution: default}]
   [INFO] [gwt:generateAsync {execution: default}]
   [INFO] [eclipse:eclipse {execution: default-cli}
   [INFO] Adding support for WTP version 2.0.
   [INFO] -----------------------------------------
   [INFO] BUILD SUCCESSFUL
   [INFO] -----------------------------------------
   

   This command will add the following files to your project:
   

   .classpath
   .project
   .settings
   target

   You may have to enable "show hidden files" in your file explorer to view them
   
5. Open Eclipse and import the project

Maven Issues

If in case you have Maven repository issues, you can always download the depedencies directly from Sonatype OSS for Google GWT.

Conclusion

That's it! We've have successfully completed our GWT and Spring integration. We've learned how to generate a simple GWT project using the GWT Maven plugin, and integrate Spring using the GWTHandler library.

I hope you've enjoyed this tutorial. Don't forget to check my other tutorials at the Tutorials section.

Revision History

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Revision	Date	Description
1	Feb 5 2012	Uploaded tutorial and Github repository

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