Execute multiple queries in parallel via Streams

Question

I am having the following method:

public String getResult() {

        List serversList = getServerListFromDB();

        List ap         


        

Answer 1

As already mentioned, a standard parallel stream is probably not the best fit for your use case. I would complete each task asynchronously using an ExecutorService and "join" them when calling the getResult method:

ExecutorService es = Executors.newFixedThreadPool(3);

Future> serversList = es.submit(() -> getServerListFromDB());
Future> appList = es.submit(() -> getAppListFromDB());
Future> userList = es.submit(() -> getUserFromDB());

return getResult(serversList.get(), appList.get(), userList.get());