Map<String, Object> map = new HashMap<>(); map.put("key1", "value1"); map.put("key2", "value2"); Set<String> set = new HashSet<>(); set.add("value1"); set.add("value2"); Cache<String, Object> cache = CacheBuilder.newBuilder() .maximumSize(1000) .expireAfterWrite(10, TimeUnit.MINUTES) .build(); Object result = cache.get(key, () -> computeResult(key)); ExecutorService executor = Executors.newFixedThreadPool(10); Future<Object> future = executor.submit(() -> performTask()); Object result = future.get();