My maven module cannot be built and I don´t understand why

Question

I am learning Maven and trying to set up a simple project. I would like this structure:

-myproject
  -myproject-ear
  -myproject-service
    -webservice
  -myproject-ejb

EDIT 1
Solved. New problem in edit 2 below.

EDIT 2
I can compile and deploy my EAR file when I don´t have support for JavaEE. But when I add support for JavaEE I get some errors. The root pom.xml (myproject) is as follows:

 <?xml version="1.0" encoding="UTF-8"?>
 <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>myproject</groupId>
<artifactId>myproject</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<name>myproject</name>
<url>http://maven.apache.org</url>

<modules>
    <module>myproject-ejb</module>
    <module>myproject-service</module>
    <module>myproject-ear</module>
</modules>

<repositories>
    <repository>
        <id>jboss</id>
        <url>http://repository.jboss.org/maven2/</url>
    </repository>
</repositories>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.jboss.spec</groupId>
            <artifactId>jboss-javaee-6.0</artifactId>
            <version>3.0.2.Final</version>
            <scope>provided</scope>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.2.0.Final</version>
            <scope>provided</scope>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.2.0.Final</version>
            <scope>provided</scope>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-ejb-plugin</artifactId>
            <version>2.3</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>2.3.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-ear-plugin</artifactId>
            <version>2.8</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.4</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-resources-plugin</artifactId>
            <version>2.4.3</version>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <archive>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-ejb-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <ejbVersion>3.0</ejbVersion>
                    <archive>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-ear-plugin</artifactId>
                <version>2.8</version>
                <configuration>
                    <archive>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.1.1</version>
                <configuration>
                    <archive>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-release-plugin</artifactId>
                <version>2.0</version>
                <configuration>
                    <remoteTagging>true</remoteTagging>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <remoteTagging>true</remoteTagging>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <remoteTagging>true</remoteTagging>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
    </plugins>
</build>

And the pom.xml for the myproject-ejb looks like this:

<?xml version="1.0"?>
<project
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>myproject</groupId>
        <artifactId>myproject</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>myproject</groupId>
    <artifactId>myproject-ejb</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>myproject-ejb</name>
    <packaging>ejb</packaging>
    <url>http://maven.apache.org</url>

    <dependencies>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.2.0.Final</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

If I create an interface, like

package org.myproject.ejb.customer;

import javax.ejb.Remote;

@Remote
public interface TestBean {
    public void createSomethingOnDatabase();
}

then the javax.ejb.* package cannot be found and mvn clean install fails. Have I missed something in my pom.xml for myproject-ejb?

EDIT 3
This is what I get if I add the dependency for jboss-javaee-6.0 (including the version) in myproject-ejb:

[ERROR] Failed to execute goal on project myproject-ejb: Could not resolve dependencies for project myproject:myproject-ejb:ejb:1.0-SNAPSHOT: The following artifacts could not be resolved: org.jboss.spec:jboss-javaee-6.0:jar:3.0.2.Final, xalan:xalan:jar:2.7.1.jbossorg-2: Could not find artifact org.jboss.spec:jboss-javaee-6.0:jar:3.0.2.Final in central (http://repo.maven.apache.org/maven2) -> [Help 1]

Answer 1

Dependencies are matched against those in dependency management using groupId, artifactId, type and classifier. Default value for type is jar and for classifier it's null.

The dependency in myproject-ejb should therefore be:

<dependency>
  <groupId>org.jboss.spec</groupId>
  <artifactId>jboss-javaee-6.0</artifactId>
  <type>pom</type>
</dependency>

(regarding EDIT 3)

Answer 2

Based on what i can see in the output you didn't defined a dependency on the webservice in your ear module, cause the webservice must be build before the ear module.

Answer 3

It looks like you are trying to depend on <artifactId>myproject-webservice</artifactId>but your module is myproject-service

Also, should myproject-service be packaged as a jar rather than a war? Typically if a project is used as a dependency by another project, it will be packaged as a jar. See this question for some notes.

Answer 4

You can add the JavaEE dependency in the myproject-ejb.

    <dependency>
        <groupId>org.jboss.spec</groupId>
        <artifactId>jboss-javaee-6.0</artifactId>
        <version>3.0.2.Final</version>
    </dependency>

Regarding your third update to the question:

Here is the dependency I use for javax.ejb.Remote :

<dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-api</artifactId>
    <version>6.0</version>
    <scope>provided</scope>
</dependency>

You may use it instead of org.jboss.spec.

Answer 5

For your EDIT 3 problem: you need to include repository into your parent pom or pom:

<repositories>
    <repository>
        <id>jboss-repo</id>
        <name>jboss-repo</name>
        <url>https://repository.jboss.org/nexus/content/repositories/thirdparty-releases</url>
    </repository>
</repositories>

Then force to update your maven dependencies.

mvn clean install -U