title: Mule ESB How to implement a counter variable to count how much times a flow is called
body: <p>I am wordering about how to implement a counter  which is will increase 1 step when flow is called. For example:
  I have a flow named: <a href="http://localhost:8080/doSomething" rel="nofollow noreferrer">http://localhost:8080/doSomething</a> and a variable counter.
  The counter variable will increase by 1 when I hit enter in doSomething service</p>
  
  <p>Many thanks</p>