presto-main/src/main/java/io/prestosql/server/ServerMainModule.java/ExecutorCleanup/ExecutorCleanup
class ExecutorCleanup:        @Inject
        public ExecutorCleanup(
                @ForExchange ScheduledExecutorService exchangeExecutor,
                @ForAsyncHttp ExecutorService httpResponseExecutor,
                @ForAsyncHttp ScheduledExecutorService httpTimeoutExecutor)
        {
            executors = ImmutableList.of(
                    exchangeExecutor,
                    httpResponseExecutor,
                    httpTimeoutExecutor);
        }