Adam Bien's Weblog

Saturday Apr 27, 2013

A Minimalistic POM For JavaEE 6/7

The essential pom for JavaEE projects is < 40 lines of 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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.airhacks</groupId>
    <artifactId>javaee-essentials-pom</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>6.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

The war plugin has only has to be added to make web.xml optional :-). If you need a web.xml (for JAX-RS or Servlets web.xml is not needed), you can remove the war plugin as well.

The pom.xml was also checked-in into: https://github.com/AdamBien/javaee-essentials-pom

If you are planning to write tests (:-)), you should replace the javaee-web-api dependency with an actual server implementation.

See you at Java EE Workshops at MUC Airport (Maven is discussed in the "Effective JavaEE" workshop)!


NEW workshop: Microservices with Java EE 7 and Java 8, January 26th, 2015, Airport Munich

A book about rethinking Java EE Patterns

Comments:

Hello Adam,

Has the crippled APIs problem you mentioned in a previous article (http://www.adam-bien.com/roller/abien/entry/trouble_with_crippled_java_ee) been resolved?

Posted by Gérald on April 28, 2013 at 02:05 PM CEST #

@Gerald,

no. It is going to be resolved in JavaEE 7. For JavaEE 6 you will have to choose an application server. I'm going to add a note to this post.

Thanks for reminding me!,

adam

Posted by Adam Bien on April 28, 2013 at 03:13 PM CEST #

This is for Java EE 6 and will not work for Java EE 7 ?

Posted by Arun Gupta on April 28, 2013 at 07:14 PM CEST #

What would the minimum pom file look like if you need to create an ear file (needed for WebSphere)?

Posted by Craig Doremus on April 29, 2013 at 10:33 PM CEST #

@Arun,

it would work with JavaEE7. However, there is no a Maven JavaEE7 dependency yet deployed to Maven central. You would have to use the dependency from java.net now. I guess it is going to be resolved after JavaEE 7 is finalized.

thanks for the comment,

adam

Posted by Adam Bien on April 30, 2013 at 11:27 PM CEST #

@Craig,

I never used EARs in JavaEE6 projects again. I think the last time I did it in ~2010.

Use NetBeans Maven / Ear wizard or e.g. org.codehaus.mojo.archetypes:ear-javaee6 to get the first idea.

Usually you can delete a lot of stuff afterwards (what I did for WAR projects),

thanks!,

adam

Posted by Adam Bien on April 30, 2013 at 11:30 PM CEST #

To further shorten the POM you could replace the plugin declarations with only the properties:

<properties>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>

Posted by Arend v. Reinersdorff on August 08, 2013 at 12:24 AM CEST #

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