How to add dependency to commons-lang

[mathias]

My verticle implementation should make use of the class HashCodeBuilder from the apache lib commons-lang.

But the problem is that "clean compile vertx:runMod" results in a compile failure.

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on project mymodule-vertx: Compilation failure: Compilation failure:
[ERROR] /.../TestVerticle.java:[25,39] package org.apache.commons.lang.builder does not exist
[ERROR] /.../TestVerticle.java:[63,17] cannot find symbol
[ERROR] symbol:   class HashCodeBuilder

So I added the dendency to the pom.xml (super pom):

</dependencies>
...
<dependency>
      <groupId>commons-lang</groupId>
       <artifactId>commons-lang</artifactId>
      <version>2.4</version>
      <scope>compile</scope>
      </dependency>
</dependencies>

This compiles fine. But this way I get a NoClassDefFoundError at runtime:

SEVERE: Exception in Java verticle
java.lang.NoClassDefFoundError: org/apache/commons/lang/builder/HashCodeBuilder

How to do it the right way?

[Alexander Lehmann]

how are you running your program in the end?

[mathias]

I use the following command: "mvn clean compile vertx:runMod"

[Jez P]

You need to run dependency:copy-dependencies after clean

[Alexander Lehmann]

I usually use "mvn clean package vertx:runMod" to run the module inside maven.

[mathias]

Everything runs fine with "mvn clean package vertx:runMod".
Thank you both!