Java Bien!

Trying to use Maven2 to build a GWT project, here is the simplest pom.xml I came up with, starting from Xavier’s

The project can be tested in debug mode with mvn gwt:gwt. It is tested in deployed mode with mvn jetty:run-war

Don’t forget to provide the gwt-user.jar in src/main/webapp/WEB-INF/lib.

Code legend:
Blue parts depend on your project and installation path.
Red part is only needed on a Mac.
Green part makes it easier to use the Jetty plugin.

<project>
  <properties>
    <google.webtoolkit.home>
    /Users/david/Applications/java/gwt-mac-1.4.10/
    </google.webtoolkit.home>
    <google.webtoolkit.extrajvmargs>
    -XstartOnFirstThread
    </google.webtoolkit.extrajvmargs>
  </properties>

  <repositories>
      <repository>
          <id>gwt-maven</id>
          <url>http://gwt-maven.googlecode.com/svn/trunk/mavenrepo</url>
      </repository>
  </repositories>

  <pluginRepositories>
      <pluginRepository>
          <id>gwt-maven</id>
          <url>http://gwt-maven.googlecode.com/svn/trunk/mavenrepo</url>
      </pluginRepository>
  </pluginRepositories>

  <build>
    <plugins>
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>maven-jetty-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>com.totsp.gwt</groupId>
        <artifactId>maven-googlewebtoolkit2-plugin</artifactId>
        <version>1.5.1</version>
        <configuration>
            <logLevel>ERROR</logLevel>
            <runTarget>com.valtech.planning.Planning/JnfPage.html</runTarget>
            <compileTarget>com.valtech.planning.Planning</compileTarget>
        </configuration>
        <executions>
            <execution>
                <goals>
                    <goal>compile</goal>
                </goals>
            </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

  <dependencies>
    <dependency>
        <groupId>com.google.gwt</groupId>
        <artifactId>gwt-user</artifactId>
        <version>1.4.10</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.google.gwt</groupId>
        <artifactId>gwt-servlet</artifactId>
        <version>1.4.10</version>
    </dependency>
  </dependencies>
</project>

Blog, Valtech Blog GWT, Maven

Googling for ways to integrate GWT with Spring, I didn’t find any simple solution.

Here is what I need :

• GWT RPC services should be Spring beans.
• They should be POJOs NOT extending RemoteServiceServlet.
• Mapping between Servlet paths and beans should be straightforward.

Here is what I came up with :

• It’s a very simple Servlet that receives every RPC request.
• It then gets a Spring bean by the name of the Servlet path used for the call.
• The method call to the bean is done with reflection.

public class SpringDispatchService extends RemoteServiceServlet {
    private final ClassPathXmlApplicationContext context;

    public SpringDispatchServiceImpl() {
        context=new ClassPathXmlApplicationContext(”beans.xml”);
    }

    public String processCall(String payload)
        throws SerializationException {
        try {
            Object target=context.getBean(getServletName());

            RPCRequest rpcRequest=RPC.decodeRequest(
                payload,target.getClass());
            
            Method method=rpcRequest.getMethod();
            Object[] params=rpcRequest.getParameters();

            Object result=method.invoke(target,params);
            
            return RPC.encodeResponseForSuccess(method,result);
        } catch(Throwable ex) {
            return RPC.encodeResponseForFailure(null,ex);
        }
    }
}

Blog, Valtech Blog GWT, Spring

Valtech organise les 23 et 24 octobre l’édition 2007 des Valtech Days. Cet événement sera l’occasion de partager sur les Méthodes Agiles, Web 2.0, les usines logicielles et SOA.

J’y prendrais pour ma part sans doute la parole sur la contractualisation des projets Agiles.

La deuxième journée est un Open Space Technology (Un des premiers en France à ma connaissance) sur les mêmes thèmes. Une belle occasion de partager vos retours d’expérience avec des intervenants de divers horizons

Blog Méthodes Agiles, Valtech