How to execute JPA Entity manager operations inside Quarkus-Kafka consumer method

问题

Dears, I want to update my domain entities according to message being received by Kafka topic. I am using Quarkus latest and Smallrye reactive messaging with Kafka. Pub-sub model is working fine with me, but in consumer method I am unable to update my entities using entityManager or HibernatePanache.

Whenever I try to use entityManager code inside consumer message, an exception is being thrown and handled silently. Here is my consumer code :

@Transactional
@Incoming("new-payment")
public CompletionStage<Void> updateTotalBuyers(String paymentEvent) {
        return CompletableFuture.runAsync(() -> {
            PaymentEvent event = jsonb.fromJson(paymentEvent, PaymentEvent.class);
            TypedQuery<Book> query = em.createQuery("SELECT b FROM Book b where b.isbn=:isbn", Book.class);
            query.setParameter("isbn", event.getIsbn());
            Book book = query.getSingleResult();
            book.setTotalBuyers(book.getTotalBuyers() + 1);
            em.merge(book);
        });
    }

If anyone has a working code snippet for my problem it would be great. Also, how can I print that silent exception for further debugging ?

Update : I surrounded the code with try/catch block and the below exception is being thrown :

javax.enterprise.context.ContextNotActiveException: interface javax.enterprise.context.RequestScoped at io.quarkus.hibernate.orm.runtime.RequestScopedEntityManagerHolder_ClientProxy.arc$delegate(RequestScopedEntityManagerHolder_ClientProxy.zig:83) at io.quarkus.hibernate.orm.runtime.RequestScopedEntityManagerHolder_ClientProxy.getOrCreateEntityManager(RequestScopedEntityManagerHolder_ClientProxy.zig:191) at io.quarkus.hibernate.orm.runtime.entitymanager.TransactionScopedEntityManager.getEntityManager(TransactionScopedEntityManager.java:78) at io.quarkus.hibernate.orm.runtime.entitymanager.TransactionScopedEntityManager.createQuery(TransactionScopedEntityManager.java:317) at io.quarkus.hibernate.orm.runtime.entitymanager.ForwardingEntityManager.createQuery(ForwardingEntityManager.java:142) at io.quarkus.hibernate.orm.panache.runtime.JpaOperations.find(JpaOperations.java:208) at io.quarkus.hibernate.orm.panache.runtime.JpaOperations.find(JpaOperations.java:200) at org.ibra.ebs.book.model.Book.find(Book.java) at org.ibra.ebs.book.service.BookService.lambda$updateTotalBuyers$0(BookService.java:106) at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1626) at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1618) at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

I added annotation @ActivateRequestContext on both class and method with no luck.

Update : I tried to elevate context-propagation using

<dependency>
   <groupId>io.quarkus</groupId>
   <artifactId>quarkus-smallrye-reactive-streams-operators</artifactId>
</dependency>

Also same exception is being thrown with some context-propagation classes (which means it is being activated).

Regards.

回答1:

Add @ApplicationScoped and @ActivateRequestContext both these annotations on the class and @Transactional annotation on the updateTotalBuyers method.

Cheers!

回答2:

Finally it worked :), Yes the answer was around context-propagation and here is what I did :

@Transactional
@Incoming("new-payment")
public CompletionStage<?> updateTotalBuyers(Message<String> paymentEvent) {

    //TODO: move to CDI producer
    ManagedExecutor executor = ManagedExecutor.builder()
            .maxAsync(5)
            .propagated(ThreadContext.CDI, 
                        ThreadContext.TRANSACTION)
            .build();
    //TODO: move to CDI producer
    ThreadContext threadContext = ThreadContext.builder()
                     .propagated(ThreadContext.CDI, 
                                 ThreadContext.TRANSACTION)
                     .build();

    return executor.runAsync(threadContext.contextualRunnable(() -> {
        try {
            log.info("Into update total buyers");
            PaymentEvent event = jsonb.fromJson(paymentEvent.getPayload(), PaymentEvent.class);
            Book book = Book.find("isbn", event.getIsbn()).singleResult();
            book.totalBuyers++;
            book.persist();
            log.info("Total books {}", book.totalBuyers);
        } catch(Exception e) {
            log.error("Something wrong happened !!!", e);
        } finally {
            paymentEvent.ack();
        }
    }));
}

I will try to make it more standard now.

回答3:

I had simillar issue using Quarkus + a single thread executor to collect AWS SQS messages.

Initial - wrong approach:

private final ExecutorService scheduler  = Executors.newSingleThreadExecutor();
scheduler.submit(/*MyRunnable*/)

Solution: Injecting ManagedExecutor which is provided by quarkus:

@Inject
ManagedExecutor managedExecutor;
managedExecutor.submit(/*MyRunnable*/);

In your particular case you can replace following code with injecting ManagedExecutor.

ManagedExecutor executor = ManagedExecutor.builder()
        .maxAsync(5)
        .propagated(ThreadContext.CDI, 
                    ThreadContext.TRANSACTION)
        .build();
//TODO: move to CDI producer
ThreadContext threadContext = ThreadContext.builder()
                 .propagated(ThreadContext.CDI, 
                             ThreadContext.TRANSACTION)
                 .build();

来源：https://stackoverflow.com/questions/58534957/how-to-execute-jpa-entity-manager-operations-inside-quarkus-kafka-consumer-metho

标签

apache-kafka

quarkus