Maven project depending on two versions of the same artifact

Question

I have a project with two seperate modules that uses sqlline and another library(say OtherLib) that depends on jline. However on different versions.

External Librari

Answer 1

I found a an answer here using maven-dependency-plugin

In pom.xml

<build>
   <plugins>
      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-dependency-plugin</artifactId>
         <version>2.1</version>
         <executions>
           <execution>
               <id>copy-model</id>
               <phase>package</phase>
               <goals>
                  <goal>copy</goal>
               </goals>
               <configuration>
                 <artifactItems>
                   <artifactItem>
                       <groupId>jline</groupId>
                       <artifactId>jline</artifactId>
                       <version>2.10</version>
                       <type>jar</type>
                   </artifactItem>
                 <artifactItems>
                 <outputDirectory>../../resources/lib</outputDirectory>
               </configuration>
           </execution>
        </executions>
     </plugin>
   <plugins>  
 <build>
   

And in assembly.xml

   <fileSet>
        <directory>../../resources/lib</directory>
        <outputDirectory>${HOME}/lib/module1</outputDirectory>
        <directoryMode>755</directoryMode>
        <fileMode>644</fileMode>
        <includes>
            <include>jline-*</include>
        </includes>
    </fileSet>

jline-0.9.94 is included in a dependencySet as any other dependency. I hope this helps. :)

Answer 2

If you're absolutely sure, what you're doing, you can repackage one of the version using something like maven-shade-plugin. But please be absolutely sure, what you're doing.

With maven-shade-plugin you could create a new Maven module, say jline:jline_2_10:jar:1.0 and use jline:jline:jar:2.10 as a dependency. The maven-shade-plugin would then package it in your jline_2_10-1.0.jar.

Since your new artifact has its own groupId:artifactId combination, there will be no conflicts with the other jline:jline:jar:0.9.94 artifact, so you'll happily have both in the classpath.