Hello
Thanks for trying to help me !
One of my tries is : compile the "maven-googlewebtoolkit2-sample"
using gwt-maven-plugin
it was a three modules project war rpc and server
I reduced it to war server , by merging rpc and server
I join the pom and web.xml of the war
mvn package report
ERROR] Failed to execute goal
org.codehaus.mojo:gwt-maven-plugin:2.1.0-1:mergewebxml (default) on project
maven-googlewebtoolkit2-sample-war: Unable to merge web.xml:
NullPointerException -> [Help 1]
----- Original Message -----
From: Andreas Horst
To: [email protected]
Sent: Wednesday, December 22, 2010 12:26 AM
Subject: Re: Modular rpc blues
Another question just coming to my mind:
Where in the inherited module are you declaring the RPC servlet?
If you declare it in the inherited module's web.xml then make sure the Maven
GWT plugin parameter "webXml" properly points to it (Not sure how one would do
this - never did it myself - especially since inherited modules usually come
as a .jar. If so does yours include the web.xml?).
If you declare it in the inherited module's module descriptor (a.k.a.
*.gwt.xml) all should be fine. Hence I assume you do not declare it there? Look
here for details about the module descriptor, note the <servlet> tag.
My 2cents: Use the second option.
Why? Because obviously your inherited module realizes functionality that is
to be reused. It is hence some sort of library and not (only?) an application
or even a .war packed web application. All our inherited modules are _library_
modules, they don't get deployed on an _application_ server on their own. Now
if one of those features functionality through RPC (we have some of those) we
thankfully use the above mentioned <servlet> tag in the module descriptor and
let the Maven GWT plugin do its job. IMHO on the one hand a web.xml does not
belong into a common not "runnable" module and on the other one a (.war packed)
application is not best suitable for inheriting functionality.
Regards
2010/12/21 Andreas Horst <[email protected]>
2010/12/21 Thomas Broyer <[email protected]>
On Tuesday, December 21, 2010 9:51:38 AM UTC+1, coelho wrote:
Hello
What seems to me great in GWT is that it's easy to build
client code and server code that can communicate through GWT-RPC.
What 's great too is that you can write modules
and your webapp can use those modules.
Then why is it so complicated ( is it possible ? ) to have a module
with GWT-RPC code
( implementation and interfaces )
that could be used in a webapp
And by "so complicated" you mean adding half a dozen lines to your
web.xml file, right?
Actually the goal gwt:mergewebxml is really ALL you need (believe me, we
use it just like that for exactly what you are trying to). Please clarify what
you mean with "web.xml refers to external module". I assume either your web.xml
gets or already is troubled or your POM is not configured properly.
I tried many things in eclipse
I tried many things with maven
( gwt-maven-plugin : goal mergewebxml ) fails when web.xml refers
to external module
still no success !
Have a look at the cargo maven plugin (I haven't tried it though)
I wondered if there is such a project already done
Is there somewhere a jar , ready made , with GWT-RPC included that I
could use as a reference ?
or is hopeless ?
I believe that's what web-fragments in Servlets 3.0 are meant to solve:
http://java.sun.com/developer/technicalArticles/JavaEE/JavaEE6Overview_Part2.html#webfrags
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Andreas Horst
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Tel. +49 (0)170 4162251, mailto:[email protected]
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<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd"; >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!--
<servlet>
<servlet-name>HttpServlet</servlet-name>
<servlet-class>com.totsp.mavenplugin.gwt.sample.server.HttpServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HttpServlet</servlet-name>
<url-pattern>/HttpServlet</url-pattern>
</servlet-mapping>
-->
<servlet>
<servlet-name>TstServlet</servlet-name>
<servlet-class>com.totsp.mavenplugin.gwt.sample.server.BidonServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TstServlet</servlet-name>
<url-pattern>/BidonServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
<?xml version="1.0" encoding="UTF-8"?>
<project>
<parent>
<artifactId>maven-googlewebtoolkit2-sample</artifactId>
<groupId>com.totsp.gwt</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>maven-googlewebtoolkit2-sample-war</artifactId>
<packaging>war</packaging>
<name>maven-googlewebtoolkit2-sample-war</name>
<dependencies>
<dependency>
<groupId>com.totsp.gwt</groupId>
<artifactId>maven-googlewebtoolkit2-sample-server</artifactId>
</dependency>
<!-- GWT deps -->
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwtVersion}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwtVersion}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
<scope>provided</scope>
</dependency>
<!--
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
<classifier>${platform}-libs</classifier>
<type>zip</type>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
<classifier>${platform}</classifier>
<scope>provided</scope>
</dependency>
-->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
<!-- All the fantastical settings that GWT needs -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>2.1.0-1</version>
<!--
<version>1.3-SNAPSHOT</version>
-->
<!--
<groupId>com.totsp.gwt</groupId>
<artifactId>maven-googlewebtoolkit2-plugin</artifactId>
<version>2.0-RC1</version>
-->
<configuration>
<logLevel>INFO</logLevel>
<compileTargets>
<value>com.totsp.mavenplugin.gwt.sample.Application</value>
</compileTargets>
<runTarget>com.totsp.mavenplugin.gwt.sample.Application/Application.html</runTarget>
<!-- use style OBF for prod -->
<style>DETAILED</style>
<noServer>false</noServer>
<extraJvmArgs>-Xmx512m</extraJvmArgs>
<!-- this parameter is VERY important with automatic mode - has to match the version in your declared deps -->
<!-- if this is set incorrect, or left out and default does not match (default is 1.5.3 for 2.0-RC1) you will have mysterious errors -->
<gwtVersion>${gwtVersion}</gwtVersion>
</configuration>
<executions>
<execution>
<goals>
<!-- plugin goals -->
<goal>mergewebxml</goal>
<goal>compile</goal>
<!--
<goal>gwt</goal>
-->
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<webXml>target/web.xml</webXml>
</configuration>
</plugin>
<!--
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>unpack</id>
<phase>compile</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
<type>jar</type>
<overWrite>false</overWrite>
<outputDirectory>${settings.localRepository}/com/google/gwt/gwt-dev/${gwtVersion}</outputDirectory>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
-->
<!--
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>unpack</id>
<phase>compile</phase>
<goals>
<goal>unpack</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
<classifier>${platform}-libs</classifier>
<type>zip</type>
<overWrite>true</overWrite>
<outputDirectory>${settings.localRepository}/com/google/gwt/gwt-dev/${gwtVersion}</outputDirectory>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
-->
</plugins>
</build>
<!-- standard Maven reporting done here -->
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>
maven-project-info-reports-plugin
</artifactId>
<reportSets>
<reportSet>
<reports>
<report>dependencies</report>
</reports>
</reportSet>
</reportSets>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<!-- the Maven Surefire Report plugin has a bug where it re-runs the tests,
this is needed to avoid that - http://jira.codehaus.org/browse/SUREFIRE-257 -->
<reportSets>
<reportSet>
<reports>
<report>report-only</report>
</reports>
</reportSet>
</reportSets>
</plugin>
</plugins>
</reporting>
<!-- profiles (with activation per platform)
<profiles>
<profile>
<id>gwt-dev-windows</id>
<properties>
<platform>windows</platform>
</properties>
<activation>
<activeByDefault>true</activeByDefault>
<os>
<family>windows</family>
</os>
</activation>
</profile>
<profile>
<id>gwt-dev-mac</id>
<properties>
<platform>mac</platform>
</properties>
<activation>
<activeByDefault>false</activeByDefault>
<os>
<family>mac</family>
</os>
</activation>
</profile>
<profile>
<id>gwt-dev-linux</id>
<properties>
<platform>linux</platform>
</properties>
<activation>
<activeByDefault>false</activeByDefault>
<os>
<name>linux</name>
</os>
</activation>
</profile>
</profiles>
-->
</project>
