Java: set timeout on a certain block of code?

Question

Is it possible to force Java to throw an Exception after some block of code runs longer than acceptable?

Answer 1

If you want a CompletableFuture way you could have a method like

public MyResponseObject retrieveDataFromEndpoint() {

   CompletableFuture endpointCall 
       = CompletableFuture.supplyAsync(() ->
             yourRestService.callEnpoint(withArg1, withArg2));

   try {
       return endpointCall.get(10, TimeUnit.MINUTES);
   } catch (TimeoutException 
               | InterruptedException 
               | ExecutionException e) {
       throw new RuntimeException("Unable to fetch data", e);
   }
}

If you're using spring, you could annotate the method with a @Retryable so that it retries the method three times if an exception is thrown.