How to mark maven plugin threadSafe - maven-3

Question

I want to mark maven-clean-plugin as threadsafe using #threadSafe annotation. could anybody give an example?
EDIT:
After I upgraded to maven 3.0.5, my build got below warnings: (building using teamcity)
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] *****************************************************************Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * Your build is requesting parallel execution, but project *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * contains the following plugin(s) that are not marked as *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * #threadSafe to support parallel building. *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * While this /may/ work fine, please look for plugin updates *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * and/or request plugins be made thread-safe. *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * If reporting an issue, report it against the plugin in *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] * question, not against maven-core *Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] *****************************************************************Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] The following plugins are not marked #threadSafe in STRAW Main Application:Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] org.apache.maven.plugins:maven-clean-plugin:2.3Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] org.apache.maven.plugins:maven-install-plugin:2.2Agent time: 14:21:10
[18:51:10][com.dir.hay.straw:straw-parent] [WARNING] *****************************************************************
From the maven documentation, I too understand that clean plugin is thread safe. Even then, I get this warning. So, I thought I miss something somewhere.

Answer 1

First why you are trying to use is an old style XDoclet annotation which is deprecated you should Java 5 annotations like this:
What would you like to do? The maven-clean-plugin is already thread safe. Which version of maven-clean-plugin do you use?
#Mojo( name = "WhatEver",
threadSafe = true)
public class MyMojo
extends AbstractMojo