Grails and Maven Integration: building war file by using maven - maven

Question

I can build a war file by running Grails command 'war', and the war file runs perfectly.
when it comes to maven, it doesn't work at all!
I build the project by run 'clean package', and skipped all the tests(don't know if this will affect the war)
The war file is generated in target directory, but I noticed the war file size is different from the one generated by grails command. Also when I deployed the maven generated war file onto out tomcat server, it cannot run.
Another question is do I need to add maven-war in the pom.xml? Because if I don't add the goal, it will still build a war file, what's the difference with setting up goal?
my pom file:
<properties>
<grails.version>2.1.1</grails.version>
</properties>
<dependencies>
<dependency>
<groupId>org.grails</groupId>
<artifactId>grails-dependencies</artifactId>
<version>${grails.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.grails</groupId>
<artifactId>grails-test</artifactId>
<version>${grails.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.grails</groupId>
<artifactId>grails-plugin-testing</artifactId>
<version>${grails.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>tomcat</artifactId>
<version>${grails.version}</version>
<scope>provided</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>cache</artifactId>
<version>1.0.1</version>
<scope>compile</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>database-migration</artifactId>
<version>1.3.2</version>
<scope>runtime</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>joda-time</artifactId>
<version>1.4</version>
<scope>runtime</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>hibernate</artifactId>
<version>${grails.version}</version>
<scope>runtime</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>jquery-ui</artifactId>
<version>1.8.24</version>
<scope>runtime</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>jquery</artifactId>
<version>1.8.0</version>
<scope>runtime</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>resources</artifactId>
<version>1.1.6</version>
<scope>runtime</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>webxml</artifactId>
<version>1.4.1</version>
<scope>provided</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>spring-security-core</artifactId>
<version>1.2.7.3</version>
<scope>provided</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>org.grails.plugins</groupId>
<artifactId>spring-security-ldap</artifactId>
<version>1.0.6</version>
<scope>provided</scope>
<type>zip</type>
</dependency>
<!--<dependency>-->
<!--<groupId>com.rbccm.erebus</groupId>-->
<!--<artifactId>erebus</artifactId>-->
<!--<version>4.1.1-SNAPSHOT</version>-->
<!--</dependency>-->
</dependencies>
<build>
<pluginManagement/>
<plugins>
<!-- Disables the Maven surefire plugin for Grails applications, as we have our own test runner -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
<executions>
<execution>
<id>surefire-it</id>
<configuration>
<skip>false</skip>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<filesets>
<fileset>
<directory>plugins</directory>
<includes>
<include>**/*</include>
</includes>
<followSymlinks>false</followSymlinks>
</fileset>
</filesets>
</configuration>
</plugin>
<plugin>
<groupId>org.grails</groupId>
<artifactId>grails-maven-plugin</artifactId>
<version>${grails.version}</version>
<configuration>
<!-- Whether for Fork a JVM to run Grails commands -->
<skipTests>true</skipTests>
<fork>true</fork>
</configuration>
<extensions>true</extensions>
<executions>
<execution>
<goals>
<goal>clean</goal>
<goal>maven-war</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<!-- fix for grails bug http://jira.grails.org/browse/MAVEN-1 -->
<id>recopy-resources-after-grails</id>
<phase>package</phase>
<goals>
<goal>resources</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>grails</id>
<name>grails</name>
<url>http://repo.grails.org/grails/core</url>
</repository>
<repository>
<id>grails-plugins</id>
<name>grails-plugins</name>
<url>http://repo.grails.org/grails/plugins</url>
</repository>
</repositories>
<profiles>
<profile>
<id>tools</id>
<activation>
<property>
<name>java.vendor</name>
<value>Sun Microsystems Inc.</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>${java.version}</version>
<scope>system</scope>
<systemPath>${java.home}/../lib/tools.jar</systemPath>
</dependency>
</dependencies>
</profile>
</profiles>

Answer 1

I figure out that I missed a jar dependency, so the war file cannot run