/code> will only be available if it is
 also available in the execution thread (for example, when the proxy method
 is invoked from a Servlet or Bean Managed Transaction). When there is
 no existing transaction on the execution thread, such as when running tasks
 that are submitted to a <a href="ManagedExecutorService.html" title="interface in jakarta.enterprise.concurrent"><code>ManagedExecutorService</code></a> or a
 <a href="ManagedScheduledExecutorService.html" title="interface in jakarta.enterprise.con