How to configure Maven shade plugin in a multi-module project?

Question

I have been trying to get jar using Maven Shade Plugin, but I still don\'t get a success.

This is my project structure:

MainModule
  -Module1
    -src
             


        

Answer 1

You MainModule is not supposed to produce a jar file. It can produce only... pom files. It contains configuration shared across all it child modules. This is why the shade plugin is called against each modules.

Instead, create a third module. Let's call it FinalModule. This module is a child of MainModule. Move the whole node from MainModule pom.xml to FinalModule pom.xml.

File structure:

   MainModule
      -FinalModule
        -src
        -pom.xml
      -Module1
        -src
        -pom.xml
      -Module2
        -src
        -pom.xml
      -pom.xml

The FinalModule pom.xml looks like this:

FinalModule (pom.xml)

    com.plugintest
    MainModule
    1.0-SNAPSHOT

FinalModule


    
        com.plugintest
        Module1
        1.0-SNAPSHOT
    
    
        com.plugintest
        Module2
        1.0-SNAPSHOT
    



    
        
            org.apache.maven.plugins
            maven-shade-plugin
            2.2
            
                
                    package
                    
                        shade
                    
                
            
        
    

In the end, you should get something like this:

[INFO] 
[INFO] --- maven-jar-plugin:2.3.2:jar (default-jar) @ FinalModule ---
[INFO] Building jar: D:\workspaces\java\Parent\FinalModule\target\FinalModule-1.0-SNAPSHOT.jar
[INFO] 
[INFO] --- maven-shade-plugin:2.2:shade (default) @ FinalModule ---
[INFO] Including my:Module1:jar:1.0-SNAPSHOT in the shaded jar.
[INFO] Including my:Module2:jar:1.0-SNAPSHOT in the shaded jar.
[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing D:\workspaces\java\Parent\FinalModule\target\FinalModule-1.0-SNAPSHOT.jar with D:\workspaces\java\Parent\FinalModule\target\FinalModule-1.0-SNAPSHOT-shaded.jar
[INFO] Dependency-reduced POM written at: D:\workspaces\java\Parent\FinalModule\dependency-reduced-pom.xml
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Parent ............................................ SUCCESS [0.016s]
[INFO] Module1 ........................................... SUCCESS [1.654s]
[INFO] Module2 ........................................... SUCCESS [0.343s]
[INFO] FinalModule ....................................... SUCCESS [0.953s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------