If you have not already done so, prepare the broker distribution before running the example.
To run the example, simply type mvn verify from this directory, or mvn -PnoServer verify if you want to start and create the broker manually.
This example shows how a message plugin can be used to filter message sent to a consumer depending on that consumers roles. Credentials for a user are by default invalidated every 10 seconds so this plugin may cause excessive authentication if used without configuring the security-invalidation-interval limit appropriately.