title: How to pass instance variables into Quartz job?
body: <p>I wonder how to pass an instance variable externally in Quartz?</p>
  
  <p>Below is pseudo code I would like to write. How can I pass externalInstance into this Job?</p>
  
  <pre><code>public class SimpleJob implements Job {
          @Override
          public void execute(JobExecutionContext context)
                  throws JobExecutionException {
  
              float avg = externalInstance.calculateAvg();
          }
  }
  </code></pre>