title: How to cancel an ongoing Spring Flux?
body: <p>I'm using a spring flux to send parallel requests to a service, this is very simplified version of it:</p>
  
  <pre><code>Flux.fromIterable(customers)
    .flatMap { customer -&gt;
       client.call(customer)
    } ...
  </code></pre>
  
  <p>I was wondering how I could cancel this flux, as in, grab a reference to the flux somehow and tell it to shut down.</p>