How to build an EAR project with EJB and WAR using Maven?

Question

I tried to create EAR Project with EJB and WAR but I have some problem. I created the main project from the Java EE 6 EAR Archetype:

Answer 1

I highly suggest that you understand how multi-module builds work. The Sonatype book has a great chapter describing in great detail.

To build an EAR with an EJB and a WAR, you actually need three modules, for the EJB, WAR and EAR. The parent POM just holds everything together and has a packaging type of POM.

So the parent pom.xml should look like this:

<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>org.sonatype.mavenbook.multi</groupId>
    <artifactId>simple-parent</artifactId>
    <packaging>pom</packaging>
    <version>1.0</version>
    <name>Multi Chapter Simple Parent Project</name>

    <modules>
        <module>ejb-module</module>
        <module>war-module</module>
        <module>ear-module</module>
    </modules>
</project>

Then, each of the child POMs would look like this:

ejb-module/pom.xml:

<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>
    <parent>
        <groupId>org.sonatype.mavenbook.multi</groupId>
        <artifactId>simple-parent</artifactId>
      <version>1.0</version>
    </parent>
    <artifactId>ejb-module</artifactId>
    <packaging>ejb</packaging>
</project>

war-module/pom.xml

<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>
    <parent>
        <groupId>org.sonatype.mavenbook.multi</groupId>
        <artifactId>simple-parent</artifactId>
        <version>1.0</version>
    </parent>

    <artifactId>war-module</artifactId>
    <packaging>war</packaging>
    <name>simple-webapp Maven Webapp</name>
    <dependencies>
        <dependency>
            <groupId>org.sonatype.mavenbook.multi</groupId>
            <artifactId>ejb-module</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>
</project>

ear-module/pom.xml:

<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>
    <parent>
        <groupId>org.sonatype.mavenbook.multi</groupId>
        <artifactId>simple-parent</artifactId>
        <version>1.0</version>
    </parent>

    <artifactId>ear-module</artifactId>
    <packaging>ear</packaging>
    <name>EAR module</name>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-ear-plugin</artifactId>
                <version>2.10.1</version>
                <configuration>
                    <ejbModule>
                        <groupId>org.sonatype.mavenbook.multi</groupId>
                        <artifactId>ejb-module</artifactId>
                        <bundleFilename>ejb-module.jar</bundleFilename>
                    </ejbModule>
                    <webModule>
                        <groupId>org.sonatype.mavenbook.multi</groupId>
                        <artifactId>war-module</artifactId>
                        <contextRoot>/foo</contextRoot>
                    </webModule>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Answer 2

> 1. parent  QCforCC-parent : 

    <artifactId>QCforCC-parent</artifactId>
    <packaging>pom</packaging>
    ...
    ...
    <modules>
        <module>QCforCC-ear</module>
        <module>QCforCC-ejb</module>
        <module>QCforCC-war</module>
    </modules>

> 2. QCforCC-ear :

<artifactId>QCforCC-ear</artifactId>
<packaging>ear</packaging>
...
...
 <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-ear-plugin</artifactId>
        <configuration>
          <version>5</version>
          <displayName>XXXXXXXX</displayName>  
          <modules>
             <webModule>             
                <moduleId>WebModule_XXX</moduleId>
                <groupId>${project.groupId}</groupId>
                <artifactId>>QCforCC-war</artifactId>   
               <contextRoot>XXXXXXXX</contextRoot>
             </webModule>  
                <jarModule>
                            <groupId>${project.groupId}</groupId>
                            <artifactId>QCforCC-ejb</artifactId>
                 </jarModule>            
          </modules>  
        </configuration>
      </plugin>
    </plugins>