title: how to parse query argument using vertx?
body: <p>I wanted to check if we can use getparam to parse start_time and end_time from the below request URL</p>
  
  <pre><code>https://[--hostname--]/sample_app/apthroughput/getAllControllers?start_time=&lt;start time value&gt;&amp;end_time=&lt;end time value&gt;&amp;label=&lt;selected label&gt;
  </code></pre>