As part of a migration for a build from Java 1.7 to 1.8, I am trying to cleanly maintain a separation of the maven artifacts (the current JRE on the web server is still running 1.7 - it would be a Bad Thing to have a Java 8 compiled program get on the wrong server). I am attempting to use a classifier that is added as part of a profile to clearly distinguish the artifacts that are built.
There is a jar 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">
<parent>
<artifactId>parentpom</artifactId>
<groupId>com.shagie.mvn</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<packaging>jar</packaging>
<artifactId>the-jar</artifactId>
</project>
There is a war 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">
<parent>
<artifactId>parentpom</artifactId>
<groupId>com.shagie.mvn</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>the-war</artifactId>
<dependencies>
<dependency>
<groupId>com.shagie.mvn</groupId>
<artifactId>the-jar</artifactId>
</dependency>
</dependencies>
</project>
There is also the 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.shagie.mvn</groupId>
<artifactId>parentpom</artifactId>
<version>1.0-SNAPSHOT</version>
<modules>
<module>the-jar</module>
<module>the-war</module>
</modules>
<packaging>pom</packaging>
<properties>
<java.version>1.7</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.shagie.mvn</groupId>
<artifactId>the-jar</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>jdk8</id>
<properties>
<java.version>1.8</java.version>
</properties>
<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
<configuration>
<classifier>jdk8</classifier>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>war</goal>
</goals>
<configuration>
<classifier>jdk8</classifier>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.shagie.mvn</groupId>
<artifactId>the-jar</artifactId>
<version>1.0-SNAPSHOT</version>
<classifier>jdk8</classifier>
</dependency>
</dependencies>
</dependencyManagement>
</profile>
</profiles>
</project>
The individual artifacts do build correctly with the specified Java version.
Unfortunately, the war is not getting built using the jdk8 classifier specified jar as a dependency.
This can be seen when running mvn help:effective-pom -P jdk8 in the war project:
...
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.shagie.mvn</groupId>
<artifactId>the-jar</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.shagie.mvn</groupId>
<artifactId>the-jar</artifactId>
<version>1.0-SNAPSHOT</version>
<classifier>jdk8</classifier>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.shagie.mvn</groupId>
<artifactId>the-jar</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
</dependencies>
...
This is reflected when running the dependency graph:
$ mvn dependency:tree -P jdk8
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building the-war 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ the-war ---
[INFO] com.shagie.mvn:the-war:jar:1.0-SNAPSHOT
[INFO] \- com.shagie.mvn:the-jar:jar:1.0-SNAPSHOT:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
Is there a way to have a profile activation to change specific jar dependencies to use a classifier?