Hi all,
The following is a little scheme I came up with for configuring a
maven based gwt project. I specifically wanted to avoid using gwt-
maven-plugin as I've had some issues with it. It feels a bit redundant
too.
The example pom below is for an experimentation project that uses gwt,
the incubator and commons-io. The project layout uses the maven
standard /src/main/webapp for the exploded war and not /war as
google's gwt eclipse plugin does. To achieve this maven is configured
to output class files in /src/main/webapp/WEB-INF/classes and not
under /target. The clean plugin is also pointed to same output
locations so that mvn clean works.
The pom defines two profiles. One is the dev profile ( active by
default ) which also depends on the gwt-dev artifact for dev mode,
etc. The second is the web profile which is used for running the gwt
compiler ( for example by calling mvn -Pweb install ). The web profile
uses maven-antrun-plugin and ant's java task to run the gwt compiler.
A trivial bit of javascript is used to determine the processor count
on the current machine and so it's possible to pass the optimal -
localWorkers setting to the gwt compiler.
An ide launch configuration for dev mode would need to:
* use com.google.gwt.dev.DevMode as main class
* add src/main/java and src/main/resources to the classpath
* add something like -
agentlib:jdwp=transport=dt_socket,address=1025,server=y,suspend=n to
the VM args to allow connecting a debugger to the web app
* use something like this for the main class's arguments:
-war src/main/webapp
-startupUrl /index.html
-codeServerPort 1026
-port 1027
com.example.TestGWT.TestGWT
If setting this up in, say, eclipse feels like too much clicking, it's
possible to achieve the same effect from a linux shell by:
running once:
cp=`mvn dependency:build-classpath | grep -E '^[^[]'`;
running every time you want to start dev mode:
ava -agentlib:jdwp=transport=dt_socket,address=1025,server=y,suspend=n
-Xms256m -Xmx512m -Xss50M -XX:PermSize=128m -XX:MaxPermSize=192m -cp
$cp:src/main/java:src/main/resources com.google.gwt.dev.DevMode -war
src/main/webapp -startupUrl /index.html -codeServerPort 1026 -port
1027 com.example.TestGWT.TestGWT
The entire pom:
<project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://
www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://
maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";>
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>TestGWT</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>TestGWT</name>
<properties>
<project.build.sourceEncoding>UTF-8</
project.build.sourceEncoding>
<gwtVersion>2.0.4</gwtVersion>
<gwtIncubatorVersion>20100204-r1747</gwtIncubatorVersion>
<maven.test.skip>true</maven.test.skip>
</properties>
<build>
<outputDirectory>${basedir}/src/main/webapp/WEB-INF/classes</
outputDirectory>
<testOutputDirectory>${basedir}/src/main/webapp/WEB-INF/
classes</testOutputDirectory>
<resources>
<resource>
<directory>${basedir}/src/main/java</directory>
</resource>
<resource>
<directory>${basedir}/src/test/java</directory>
</resource>
<resource>
<directory>${basedir}/src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<configuration>
<filesets>
<fileset>
<directory>src/main/webapp/
com.example.TestGWT</directory>
</fileset>
<fileset>
<directory>src/main/webapp/WEB-INF/
classes</directory>
</fileset>
<fileset>
<directory>src/main/webapp/WEB-INF/lib</
directory>
</fileset>
</filesets>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwtVersion}</version>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwtVersion}</version>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-incubator</artifactId>
<version>${gwtIncubatorVersion}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
</dependencies>
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
<scope>runtime</scope>
</dependency>
</dependencies>
</profile>
<profile>
<id>web</id>
<activation>
<activeByDefault>false</activeByDefault>
</activation>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>gwtc</id>
<phase>process-classes</phase>
<configuration>
<tasks>
<script language="javascript">
<![CDATA[
cores =
java.lang.Runtime.getRuntime().availableProcessors();
java.lang.System.setProperty("coreCount", cores);
]]>
</script>
<java failonerror="true"
fork="true" classpathref="maven.plugin.classpath"
classname="com.google.gwt.dev.Compiler">
<classpath>
<pathelement
location="src/main/java" />
<pathelement
location="src/test/java" />
<path
refid="maven.compile.classpath" />
<path
refid="maven.runtime.classpath" />
</classpath>
<jvmarg value="-Xmx256M" /
>
<!-- Additional arguments
like -style PRETTY or -logLevel DEBUG -->
<arg value="-war" />
<arg value="${basedir}/src/
main/webapp" />
<arg value="-
localWorkers" />
<arg value="${coreCount}" /
>
<arg
value="com.example.TestGWT.TestGWT" />
</java>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-apache-bsf</
artifactId>
<version>1.7.1</version>
</dependency>
<dependency>
<groupId>rhino</groupId>
<artifactId>js</artifactId>
<version>1.7R2</version>
</dependency>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-nodeps</artifactId>
<version>1.7.1</version>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>
I hope this helps :)
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