title: Persist url parameter throughout grails app
body: <p>Essentially I am looking to have a url query parameter persist throughout the life of the grails application (POST or GET). ex.</p>
  
  <pre><code>http://localhost:8080/demo/controller/action/?myParam=foobar
  </code></pre>
  
  <p>I have tried a couple routes. Dynamic method overriding <strong>redirect</strong> and customizing application tags for <strong>createLink</strong>. However, since I also use grails webflows it doesn't quite get every single URL. I also tried using a groovy servlet (<strong>groovlet</strong>) to capture every URL and append the query parameter. The last attempt hasn't been very successful. Am I missing an obvious component to grails? Am I on the right track? Is there another avenue I haven't explored yet?</p>
  
  <p>Thanks in advance</p>