title: Spring JMS MessageListenerContainer recieving messages simultaneously?
body: <p>I would like to know what happens if <strong>MessageListenerContainer</strong>, pointing to a topic, recieves 2 (or more) messages at the same time. </p>
  
  <p>For example, 2 users of the app triggers a publish at the same time, hence 2 <strong>jmstemplate</strong> calls sending 2 different messages to the same topic. </p>
  
  <p>How will the <strong>container</strong> handle this? </p>
  
  <ol>
  <li>Will the container create 2 threads calling the <strong>MessageListenerAdapter</strong> (which should implemented as thread-safe) at same time? </li>
  <li>Or will the <strong>container</strong> have just 1 thread calling the <strong>MessageListenerAdapter</strong> serially (sequentially)?</li>
  </ol>