CODEWITHSUNDEEP
javamavenpropertiespom.xmlparent-pom
FraK
FraK

Reputation: 1089

Maven reuse properties from Super POM

I want to use the properties defined in the Super POM:

<properties>
    <jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
    <jdk.version>1.7</jdk.version>
    <jstl.version>1.2</jstl.version>
    <junit.version>4.11</junit.version>
    <logback.version>1.0.13</logback.version>
    <spring.version>4.1.1.RELEASE</spring.version>
 </properties>

In the POM.xml file of my project:

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
</dependency>

But I get the following error:

[ERROR]     'dependencies.dependency.version' for org.springframework:spring-core:jar must be a valid version but is '${spring.version}'. @ line 22, column 16

Then I have to add the same properties to the POM.xml of my project to make it work. Is there another way to do this, it seems really inefficient to do this. By the way I am new to maven.

Super POM:

 <!-- ====================================================================== -->
<!--                                                                        -->
<!-- Generated on 2015-09-04T05:07:36                                       -->
<!--                                                                        -->
<!-- ====================================================================== -->

<!-- ====================================================================== -->
<!--                                                                        -->
<!-- Effective POM for project                                              -->
<!-- 'com.mycompany.webapp:web-app:war:1.0-SNAPSHOT'                        -->
<!--                                                                        -->
<!-- ====================================================================== -->

<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.mycompany.webapp</groupId>
  <artifactId>web-app</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>web-app Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <properties>
    <jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
    <jdk.version>1.7</jdk.version>
    <jstl.version>1.2</jstl.version>
    <junit.version>4.11</junit.version>
    <logback.version>1.0.13</logback.version>
    <spring.version>4.1.1.RELEASE</spring.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.1.1.RELEASE</version>
      <scope>compile</scope>
      <exclusions>
        <exclusion>
          <artifactId>commons-logging</artifactId>
          <groupId>commons-logging</groupId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jcl-over-slf4j</artifactId>
      <version>1.7.5</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.0.13</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.1.1.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.1.1.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

  <repositories>
    <repository>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <id>central</id>
      <name>Central Repository</name>
      <url>http://repo.maven.apache.org/maven2</url>
    </repository>
  </repositories>

  <pluginRepositories>
    <pluginRepository>
      <releases>
        <updatePolicy>never</updatePolicy>
      </releases>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <id>central</id>
      <name>Central Repository</name>
      <url>http://repo.maven.apache.org/maven2</url>
    </pluginRepository>
  </pluginRepositories>

  <build>
    <sourceDirectory>/Users/marcelo/Documents/MavenTest/web-app/src/main/java</sourceDirectory>
    <scriptSourceDirectory>/Users/marcelo/Documents/MavenTest/web-app/src/main/scripts</scriptSourceDirectory>
    <testSourceDirectory>/Users/marcelo/Documents/MavenTest/web-app/src/test/java</testSourceDirectory>
    <outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/classes</outputDirectory>
    <testOutputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/test-classes</testOutputDirectory>

    <resources>
      <resource>
        <directory>/Users/marcelo/Documents/MavenTest/web-app/src/main/resources</directory>
      </resource>
    </resources>

    <testResources>
      <testResource>
        <directory>/Users/marcelo/Documents/MavenTest/web-app/src/test/resources</directory>
      </testResource>
    </testResources>

    <directory>/Users/marcelo/Documents/MavenTest/web-app/target</directory>
    <finalName>web-app</finalName>

    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-antrun-plugin</artifactId>
          <version>1.3</version>
        </plugin>
        <plugin>
          <artifactId>maven-assembly-plugin</artifactId>
          <version>2.2-beta-5</version>
        </plugin>
        <plugin>
          <artifactId>maven-dependency-plugin</artifactId>
          <version>2.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-release-plugin</artifactId>
          <version>2.0</version>
        </plugin>
      </plugins>
    </pluginManagement>

    <plugins>
      <plugin>
        <artifactId>maven-clean-plugin</artifactId>
        <version>2.4.1</version>
        <executions>
          <execution>
            <id>default-clean</id>
            <phase>clean</phase>
            <goals>
              <goal>clean</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-install-plugin</artifactId>
        <version>2.3.1</version>
        <executions>
          <execution>
            <id>default-install</id>
            <phase>install</phase>
            <goals>
              <goal>install</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.5</version>
        <executions>
          <execution>
            <id>default-resources</id>
            <phase>process-resources</phase>
            <goals>
              <goal>resources</goal>
            </goals>
          </execution>
          <execution>
            <id>default-testResources</id>
            <phase>process-test-resources</phase>
            <goals>
              <goal>testResources</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.10</version>
        <executions>
          <execution>
            <id>default-test</id>
            <phase>test</phase>
            <goals>
              <goal>test</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <executions>
          <execution>
            <id>default-testCompile</id>
            <phase>test-compile</phase>
            <goals>
              <goal>testCompile</goal>
            </goals>
          </execution>
          <execution>
            <id>default-compile</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.1.1</version>
        <executions>
          <execution>
            <id>default-war</id>
            <phase>package</phase>
            <goals>
              <goal>war</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.7</version>
        <executions>
          <execution>
            <id>default-deploy</id>
            <phase>deploy</phase>
            <goals>
              <goal>deploy</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.0</version>
        <executions>
          <execution>
            <id>default-site</id>
            <phase>site</phase>
            <goals>
              <goal>site</goal>
            </goals>
            <configuration>
              <outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
              <reportPlugins>
                <reportPlugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-project-info-reports-plugin</artifactId>
                </reportPlugin>
              </reportPlugins>
            </configuration>
          </execution>
          <execution>
            <id>default-deploy</id>
            <phase>site-deploy</phase>
            <goals>
              <goal>deploy</goal>
            </goals>
            <configuration>
              <outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
              <reportPlugins>
                <reportPlugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-project-info-reports-plugin</artifactId>
                </reportPlugin>
              </reportPlugins>
            </configuration>
          </execution>
        </executions>
        <configuration>
          <outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
          <reportPlugins>
            <reportPlugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-project-info-reports-plugin</artifactId>
            </reportPlugin>
          </reportPlugins>
        </configuration>
      </plugin>
    </plugins>
  </build>

  <reporting>
    <outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
  </reporting>
</project>

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>
  <groupId>com.mycompany.webapp</groupId>
  <artifactId>web-app</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>web-app Maven Webapp</name>
  <url>http://maven.apache.org</url>
    <properties>
        <jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
        <jdk.version>1.7</jdk.version>
        <jstl.version>1.2</jstl.version>
        <junit.version>4.11</junit.version>
        <logback.version>1.0.13</logback.version>
        <spring.version>4.1.1.RELEASE</spring.version>
    </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

      <!-- Spring Core -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>${spring.version}</version>
          <exclusions>
              <exclusion>
                  <groupId>commons-logging</groupId>
                  <artifactId>commons-logging</artifactId>
              </exclusion>
          </exclusions>
      </dependency>

      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>jcl-over-slf4j</artifactId>
          <version>${jcl-over-slf4j.version}</version>
      </dependency>

      <dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-classic</artifactId>
          <version>${logback.version}</version>
      </dependency>

      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>${spring.version}</version>
      </dependency>

      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>${spring.version}</version>
      </dependency>

      <!-- jstl -->
      <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>${jstl.version}</version>
      </dependency>

  </dependencies>
  <build>
    <finalName>web-app</finalName>
  </build>
</project>

Upvotes: 1

Views: 2816

Answers (2)

bhdrkn
bhdrkn

Reputation: 6712

In order to use properties from a parent pom your child project must extend from parent. But in order to extend, your parent pom packaging must be pom instead of war. IMHO, it would be best if you create a real parent pom and put all the properties there and than extend other two web app from that project.

Here is an example;

Parent pom.xml

<?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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.mycompany.webapp</groupId>
    <artifactId>parent-pom</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <name>parent-pom</name>

    <properties>
        <jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
        <jdk.version>1.7</jdk.version>
        <jstl.version>1.2</jstl.version>
        <junit.version>4.11</junit.version>
        <logback.version>1.0.13</logback.version>
        <spring.version>4.1.1.RELEASE</spring.version>

    </properties>


    <modules>
        <module>web-app-1</module>
        <module>web-app-2</module>
    </modules>

</project>

Than on your different projects (for example I will use web-app-1 and web-app-2)

<?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/xsd/maven-4.0.0.xsd">
    <parent>
      <groupId>com.mycompany.webapp</groupId>
      <artifactId>parent-pom</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.mycompany.webapp</groupId>
    <artifactId>web-app-1</artifactId>
    <packaging>war</packaging>
    ...
</project>

And 

<?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/xsd/maven-4.0.0.xsd">
    <parent>
      <groupId>com.mycompany.webapp</groupId>
      <artifactId>parent-pom</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.mycompany.webapp</groupId>
    <artifactId>web-app-2</artifactId>
    <packaging>war</packaging>
    ...
</project>

And your project structure will be

project-root
-- pom.xml (this is parent pom)
-- web-app-1
---- pom.xml
-- web-app-2
---- pom.xml

If you have a local maven repository (nexus, artifactory etc) you can even release parent pom and sub module differently.

And if you want to override a property simply redefine it in your sub projects (web-app-1 and web-app-2)

Upvotes: 1

Jose Martinez
Jose Martinez

Reputation: 12022

What you are calling effective POM sounds like a parent POM.

Your POM needs this

<parent>
  <groupId>com.mycompany.webapp</groupId>
  <artifactId>web-app</artifactId>
  <version>1.0-SNAPSHOT</version>
</parent>

Upvotes: 1

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