### Relevant Articles:
- [Why wait() Requires Synchronization?](https://www.baeldung.com/java-wait-necessary-synchronization)
- [Working with Exceptions in Java CompletableFuture](https://www.baeldung.com/java-exceptions-completablefuture)
- [CountDownLatch vs. Semaphore](https://www.baeldung.com/java-countdownlatch-vs-semaphore)
- [Callbacks in ListenableFuture and CompletableFuture](https://www.baeldung.com/java-callbacks-listenablefuture-completablefuture)
- [Guide to ExecutorService vs. CompletableFuture](https://www.baeldung.com/java-executorservice-vs-completablefuture)