Java multithreading with Spring JPA

Question

I have to improve a process that is currently sequential, and i wanna make it multi-thread. This process uses Spring JPA, with spring boot 2 and java 17.

I would like to have a feedback on the following mock-up and see if I can improve something, or there are errors.

The exportOrder() method is the one that contains the business logic. What happens is:

• Validates the object
• Maps OrdrDesc to ObjectA
• Stores ObjectA (Different database then OrdrDesc)
• Updates OrdrDesc
• If ObjectA was stored, maps OrdrDesc to ObjectB
• Stores ObjectB (Different database then OrdrDesc, but same as ObjectA)

Here is the code of the thread handling.

void test2() {
    final LinkedBlockingQueue<OrdrDesc> queue = new LinkedBlockingQueue<>();

    ExecutorService executorService = Executors.newFixedThreadPool(10);

    List<OrdrDesc> orders = getOrders(); // calls db - returns around 50k records
    for (OrdrDesc ordrDesc : orders) {
        try {
            queue.put(ordrDesc);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();  // set interrupt flag
            System.out.println("Failed to consume order: " + ordrDesc);
        }
    }

    Runnable consumer = () -> {
        while (!Thread.currentThread().isInterrupted() || !queue.isEmpty()) {
            OrdrDesc ordrDesc = queue.poll();
            if (ordrDesc != null) {
                exportOrder(ordrDesc);
            }
        }
    };

    while (!queue.isEmpty()) {
        executorService.execute(consumer);
    }
}