Hands-On Cloud-Native Applications with Java and Quarkus

Using asynchronous and bulkhead policies

Asynchronous programming is not a new pattern for Enterprise developers. However, when used in combination with the BulkHead policy, you can achieve a powerful fault tolerance pattern for your microservices. In a nutshell, if you annotate a method with @Asynchronous, it will be executed asynchronously on a separate thread.

In the following example, we are performing some logic in the createOrder method, which spins off some debugging in a separate thread by means of the writeSomeLogging method, which returns a CompletableFuture instance:

public void createOrder(Orders order, Customer c) {    order.setCustomer(c);    entityManager.persist(order);    writeSomeLogging(order.getItem());}@Asynchronousprivate Future ...