[Google Guava]-缓存清除

public <K, V> LoadingCache<K, V> cached(CacheLoader<K, V> cacheLoader) {
		LoadingCache<K, V> cache = CacheBuilder.newBuilder().maximumSize(2).weakKeys().softValues().refreshAfterWrite(120, TimeUnit.SECONDS).expireAfterWrite(10, TimeUnit.MINUTES).removalListener(new RemovalListener<K, V>() {
			@Override
			public void onRemoval(RemovalNotification<K, V> rn) {
				System.out.println(rn.getKey() + "被移除");

			}
		}).build(cacheLoader);
		return cache;
	}

	/**
	 * 通过key获取value 调用方式 commonCache.get(key) ; return String
	 * 
	 * @param key
	 * @return
	 * @throws Exception
	 */

	public LoadingCache<String, String> commonCache(final String key) throws Exception {
		LoadingCache<String, String> commonCache = cached(new CacheLoader<String, String>() {
			@Override
			public String load(String key) throws Exception {
				return "hello " + key + "!";
			}
		});
		return commonCache;
	}

	@Test
	public void testCache() throws Exception {
		LoadingCache<String, String> commonCache = commonCache("1");
		System.out.println("1:" + commonCache.get("1"));
		// commonCache.apply("harry");
		System.out.println("2:" + commonCache.get("2"));
		// commonCache.apply("lisa");
		System.out.println("3:" + commonCache.get("3"));
		commonCache.invalidateAll();
	}