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POWhat is the maven-shade-plugin used for, and why would you want to relocate Java packages?
 

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  1. POWhat is the maven-shade-plugin used for, and why would you want to relocate Java packages?
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    <p>I found the maven-shade-plugin being used in someone's pom.xml. I've never used maven-shade-plugin before (and I'm a Maven n00b) so I tried to understand the reason for using this and what it does. </p> <p>I looked at the <a href="http://maven.apache.org/plugins/maven-shade-plugin" rel="noreferrer">Maven docs</a>, however I can't understand this statement:</p> <blockquote> <p>"This plugin provides the capability to package the artifact in an uber-jar, including its dependencies and to shade - i.e. rename - the packages of some of the dependencies." The documentation on the page doesn't seem very newbie-friendly.</p> </blockquote> <p>What is an "uber jar?" Why would someone want to make one? What's the point of renaming the packages of the dependencies? I tried to go through the examples on the maven-shade-plugin apache page such as "Selecting contents for Uber Jar," but I still can't understand what is being accomplished with "shading."</p> <p>Any pointers to illustrative examples/use-cases (with an explanation of why shading was required in this case - what problem is it solving) would be appreciated. Lastly, when should I use the maven-shade-plugin?</p>
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    1. COFor the naming "uber jar" I have the only association with German, where "über" means "over". Together literally it means "jar-over-all-other-jars". "Shading" is the same as "package reallocation" which is needed for classes or resources that collide.
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